Page 1 of 2 12 LastLast
Results 1 to 35 of 36

Thread: Any small- pedal size guitar Power amplifier layout?

  1. #1
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0

    Any small- pedal size guitar Power amplifier layout?

    Hi there.
    Is there any good working solid state guitar power amplifier layout (or simple schematic)?
    Around 50-100w . Small size would be more preferable.
    I just need to have my preamp and power amp on my pedal board ((or being able to carry them easily) and plug directly into a cabinet (8 or 4 ohm).
    Thanks in advance.

    0 Not allowed! Not allowed!

  2. #2
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,201
    Thumbs Up/Down
    Received: 3/0
    Given: 4/0
    There are tons of Class D power amps on the net.

    Prebuilt or in kit form.

    50-100 watt output will require a sizeable power supply. (a wall wort power pack will not cut it)

    0 Not allowed! Not allowed!

  3. #3
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Do they really work good for guitars. Any particular recommendation chip and built wise? What kind of power supply do they need?

    0 Not allowed! Not allowed!

  4. #4
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    29,854
    Thumbs Up/Down
    Received: 61/1
    Given: 0/0
    One that can power a 100 watt amp. That is what takes up the room.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  5. #5
    Supporting Member eschertron's Avatar
    Join Date
    Aug 2012
    Location
    Great Black Swamp
    Posts
    1,765
    Thumbs Up/Down
    Received: 11/0
    Given: 17/0
    This what I thought of premier guitar 44 Magnum Review
    I know you want to 'build', but this looks like what you want.

    0 Not allowed! Not allowed!
    If it still won't get loud enough, it's probably broken. - Steve Conner
    We need more chaos in music, in art... I'm here to make it. - Justin Thomas
    Distortion is a form of signal degradation. It is pretty easy to define what a good "clean" signal is, but trying to achieve just the right kind of "broken" can be pretty maddening. - glebert

  6. #6
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    10,046
    Thumbs Up/Down
    Received: 56/0
    Given: 59/2
    Reasonably possible goal, with a couple caveats:

    1) not exactly *pedal* sized, although it may fit in a *pedalboard*.

    2) for real world comparison:
    a) too much heat to dissipate (even if using a Class D amp) by the limited surface allowed by a typical aluminum pedal box.
    The mentioned Magnum 44, although excellent, is about the practical limit: and no matter what the brochure or Ad says, it´s real output is 30W RMS maximum
    b) which is maximum allowed by a 24V supply and an 8 ohm speaker ... I guess you need more than that.

    3) since you need a power supply anyway, *some* Class D EBay amps also include their own Switching type power supply, which I suggest.

    By definition it will match the power amp and overall size will be most compact, since they will probably share the same board.

    Best would be one of the ICE Power modules, which plug straight into mains (selectable 120 or 240V), have an audio in, 1 or 2 speaker out (most are Stereo or Bridgeable into Mono) and to boot supply "auxiliary" +/-24V or so to feed preamps or whatever BUT: are not sold in small quantities or to end users, they deal in truckload quantities only.

    That said, some people who need, say, 30 of them, buy the 50 pack which I guess is about the minimum order, and sell the unneeded ones on EBay, so just stay alert, I have seen them appear many times, and be sold in days.

    Here´s one example:
    https://www.ebay.com/itm/Bang-Olufse...-/271545989832

    that said, this is just an example, I bet there are similar EBay offerings from less famous suppliers.

    ICE Power AS50 mounted in a cabinet:

    They do take very little space by themselves, notice chassis is almost empty except for the module, supply is built in.
    In theory it could work "naked" but of course it must be enclosed in a grounded metal box for safety, some points of the board are at mains voltage, and such box must be perforated for ventilation.

    So this is about what´s achievable .

    You may buy an "Amplifier only" board, but then will need a power supply, not sure you´ll save space (quite the contrary) .

    0 Not allowed! Not allowed!
    Juan Manuel Fahey

  7. #7
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Thank you Juan Manuel.
    What do you think about this option?

    https://www.ebay.com/itm/ICEPOWER-Po...oAAOSw0O9bBQrW

    Does it need more parts?

    And what about this one?

    https://www.ebay.com/itm/ASX50-MXR-A...cAAOSwRJ9XgfXL

    0 Not allowed! Not allowed!

  8. #8
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    10,046
    Thumbs Up/Down
    Received: 56/0
    Given: 59/2
    Mmmmmhhh,the first one needs an external power supply so it´s not what you need.

    The second link is for a very nice empty cabinet, properly grounded and with all hardware installed specially made for an ASX50 module, which IS self powered.

    I´d wait until an ASX50 appears, which looks perfect, and only then order the cabinet.
    Having both on a table, assembly should take a couple hours and I bet this would not take much space in your pedalboard.

    Keep searching, you might also find a "non famous" Chinese module doing the same as the full ICE one but at a fraction of the cost.

    All this is very fresh Technology of course.

    0 Not allowed! Not allowed!
    Juan Manuel Fahey

  9. #9
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    I guess this one is appropriate J M.

    https://www.ebay.com/itm/Bang-Olufse...AAAOSwIWVY90Hp

    But what I think is that it's a real overkill for a guitar class D power amp. I mean something like 150 euros is quite a lot for the power amp section of a guitar amp (which is not Hi Fi and doesn't need to be Hi Fi). I think this technology is still really expensive for what it does.
    Class D LM 3886 + power supply + small appropriate cabinet would be less than half the price. Ok space is an issue but still....
    Any opinion and advice or alternative ideas?

    0 Not allowed! Not allowed!

  10. #10
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,201
    Thumbs Up/Down
    Received: 3/0
    Given: 4/0
    Be aware of the specs on the datasheet of the Ice modules.

    That '50 W x 2' is not a continuous rating.

    0 Not allowed! Not allowed!

  11. #11
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    10,046
    Thumbs Up/Down
    Received: 56/0
    Given: 59/2
    Quote Originally Posted by tedsorvino View Post
    I guess this one is appropriate J M.

    https://www.ebay.com/itm/Bang-Olufse...AAAOSwIWVY90Hp

    But what I think is that it's a real overkill for a guitar class D power amp. I mean something like 150 euros is quite a lot for the power amp section of a guitar amp (which is not Hi Fi and doesn't need to be Hi Fi). I think this technology is still really expensive for what it does.
    Class D LM 3886 + power supply + small appropriate cabinet would be less than half the price. Ok space is an issue but still....
    Any opinion and advice or alternative ideas?
    I think that particular one is nor a good option: only stereo 50W/channel into 4 ohm and in my eyes expensive for what it offers.

    Besides I suspect these are old modules that maybe seller bought as surplus.
    Even if unused, one at last arrived corroded "as if it had been in the open for years" and clumsily wrapped in non original wrap.

    Model names add to the confusion:
    This is the one to get: ICEpower 50ASX2BTL, you can always turn too much power down and it also allows you to drive 8 and even 16 ohm loads, with less available power but still more than enough, 85W into 8 and 42W into 16, you have tons of speakers to choose from.

    This is the one offered above: ICEpower 50ASX2SE to get 50W you need a 4 ohm speaker (that reduces the field a lot) or 2 x 8 ohm in parallel (which increases bulk and weight), you will only get 25W into 8 ohms, less than the Magnum 44 pedal and with more bulk and cost

    Search for other brands, I guess there are a few, and more every day.

    I am thinking about going the light amp route myself, but am designing my own , specially because I want them to be repairable, not only now but in the future; I HATE parts/designs which become disposable in a year or two.

    0 Not allowed! Not allowed!
    Juan Manuel Fahey

  12. #12
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Excellent advice JM. I really appreciate it.
    I have to admit that I 've got two different cabinets. One with a 4'' and a more complicated one with 2 8'' ones that work on their own or together in parallel. But that's not the point. I want it for gigs that I don't need to carry my big tube amp head. Most of the gigs..
    If you were to chose an easier to find (and maybe cheaper) option which transistor and power supply would you advice for such a D class power amp project?
    What about LM3886?

    0 Not allowed! Not allowed!
    Last edited by tedsorvino; 05-25-2018 at 12:43 AM.

  13. #13
    Supporting Member Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,349
    Thumbs Up/Down
    Received: 14/0
    Given: 14/0
    Quote Originally Posted by tedsorvino View Post
    Hi there.
    Is there any good working solid state guitar power amplifier layout (or simple schematic)?
    Around 50-100w . Small size would be more preferable.
    I just need to have my preamp and power amp on my pedal board ((or being able to carry them easily) and plug directly into a cabinet (8 or 4 ohm).
    Thanks in advance.
    You are looking for a DIY project but here are some of the details for the Vox MV50 Rock amp which retails for $200 in response to some of the posts here:

    • The amp is rated for 50W at 4 ohms, 25W at 8 ohms and 12.5W at 16 ohms. With a decent 4 ohm cab the volume is similar to a 40 or 50 watt tube amp.

    • It does not use a wall wart but a two piece power supply similar to what might be used with a computer peripheral that has an IEC cord and a small module connected to the cord that plugs into the device. Only instead of an IEC cable it has a 3 pin "Mickey Mouse" connector.

    • As to size it all fits into an old bag designed to hold a portable CD player.

    I initially bought the MV50 Clean as I intended to use it with pedals for dirt and it does have separate bass and treble controls. I later bought and returned the MV AC since there was a lot of overlap between its lower gain settings and the MV50 Clean. After that I bought and returned the MV Rock which is what I recommend to anybody besides the target market for the MV Clean: jazz guitarists and pedal board junkies. (I would have liked to keep the Rock model but I returned it with the long-term same-as-cash financing applied towards a used Roland Blues Cube Artist 80W amp which is the best SS I have ever played and better than most of the one-or-two trick tube amps I have known.)



    MV50

    Enough for the store-bought guitar amps that you are not interested in... I suggest watching the DIY sites for someone to design a decent guitar amp using a Class D 40-50W power amp section. For now you might try running an MXR 10 band EQ between your pedalboard and a ready-made imported Class D audio power amp from Amazon or eBay that might cost somewhere between $30 & $50 (I have not looked into that in about 6 months.) Or what Juan recommended...

    Good luck!

    Steve A.

    P.S. I put velcro hooks on a piece of removable ABS plastic screwed to the bottom of MV50 Clean along with a patch of velcro loops on my 2 ohm cab so I can secure it there or to my home-made pedal board with indoor/outdoor carpet glued & stapled to a piece of thin plywood...

    Click image for larger version. 

Name:	MV50-ROCK.jpg 
Views:	164 
Size:	35.1 KB 
ID:	48949

    0 Not allowed! Not allowed!
    Last edited by Steve A.; 05-24-2018 at 10:47 PM.

  14. #14
    Old Timer olddawg's Avatar
    Join Date
    Dec 2007
    Location
    Carlsbad, CA and Kona, HI
    Posts
    2,607
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Quilter Performance Amplification
    If you look around a Quilter Power Block is $249 and will easily fit on your pedal board.

    0 Not allowed! Not allowed!

  15. #15
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Thanks a lot but I just need a power amp since I already have a superb ss pedal pre amp and several other pedal stuff (klon etc).
    So just a plain POWER amp. Nothing more.
    And preferably something that will cost under or around 100 euros. Otherwise it has to be something really amazing.

    0 Not allowed! Not allowed!

  16. #16
    Supporting Member Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,349
    Thumbs Up/Down
    Received: 14/0
    Given: 14/0
    Quote Originally Posted by tedsorvino View Post
    Thanks a lot but I just need a power amp since I already have a superb ss pedal pre amp and several other pedal stuff (klon etc).
    So just a plain POWER amp. Nothing more.
    And preferably something that will cost under or around 100 euros. Otherwise it has to be something really amazing.
    I have never had any luck running a guitar preamp or pedalboard into a hi-fi audio power amp — perhaps someone here has had better luck as I have not tried doing it for many years — which is why I suggested something like an MXR 10-band EQ with input and output sliders ahead of an audio power amp.

    BTW I forgot to mention that the Vox MV50 amps use a real dual triode vacuum tube (a Korg NuTube with a rectangular plastic "bottle") in the preamp section. IMO the NuTube technology is the biggest advance in vacuum tubes since perhaps the 1950s... I can't wait for them to become readily available at a decent price for the DIY community!

    https://korgnutube.com/en/

    Steve A.

    P.S. So do you have a real Klon or a Klone? I bought a modded EHX Soul Food pedal with a switch for germanium diodes (or no diodes at all) plus a Bass control... one of my favorite "dirt" pedals which has wonderfully enhanced clean tones, too!

    P.P.S. The datasheet mentioned in the FAQ excerpt below is NOT available on the NuTube webpage. I had to request one by pretending that Blue Guitar is a company. Hopefully they will send me the link to the file which I will post here at MEF.



    [ATTACHED=CONFIG]48950[/ATTACH]
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Screenshot_2018-05-24-15-33-41_20180524153558265.jpg 
Views:	164 
Size:	173.8 KB 
ID:	48950  

    0 Not allowed! Not allowed!
    Last edited by Steve A.; 05-24-2018 at 11:55 PM.

  17. #17
    Old Timer Leo_Gnardo's Avatar
    Join Date
    Sep 2012
    Location
    Dogpatch-on-Hudson
    Posts
    4,815
    Thumbs Up/Down
    Received: 8/0
    Given: 1/0
    Quote Originally Posted by Steve A. View Post
    I have never had any luck running a guitar preamp or pedalboard into a hi-fi audio power amp — perhaps someone here has had better luck as I have not tried doing it for many years — which is why I suggested something like an MXR 10-band EQ with input and output sliders ahead of an audio power amp.
    Sure, using hi fi amps has been done, and most famously by some of your Bay area neighbors back in 1973-74. In the lower photo you'll see five McIntosh MC2300 stereo power amps, just a fraction of the collection they used. I've done much smaller rigs for guitar, bass & keyboard systems. Of course there's no prohibition, and no shame, in using signal conditioning equipment like the graphic EQ you suggest to dial in the tone as necessary for the musos & audience.


    0 Not allowed! Not allowed!

  18. #18
    Supporting Member The Dude's Avatar
    Join Date
    May 2010
    Location
    Sioux Falls, SD
    Posts
    5,035
    Thumbs Up/Down
    Received: 13/0
    Given: 8/0
    Ah, the "wall of sound". An interesting fact about that sound system: Instead of separating instruments merely by a subgroup on a mixer and sharing amps and speakers like they do with current sound systems, each instrument and vocals had their own complete independent sound system. In other words, guitar came out of some speakers, bass others, vocals others, etc. An interesting concept in live sound production.

    0 Not allowed! Not allowed!
    “Yeah, well, you know, that’s just, like, your opinion, man.”

  19. #19
    Old Timer Leo_Gnardo's Avatar
    Join Date
    Sep 2012
    Location
    Dogpatch-on-Hudson
    Posts
    4,815
    Thumbs Up/Down
    Received: 8/0
    Given: 1/0
    Quote Originally Posted by The Dude View Post
    Ah, the "wall of sound". An interesting fact about that sound system: Instead of separating instruments merely by a subgroup on a mixer and sharing amps and speakers like they do with current sound systems, each instrument and vocals had their own complete independent sound system. In other words, guitar came out of some speakers, bass others, vocals others, etc. An interesting concept in live sound production.
    Right, they did have a mixer for vocals, and the semi-cylinder of 10 inch speakers plus EV tweeters midstage carried that. A mini version of the cylinder served piano above stage right. The mixer was an early Gamble with 18 channels. I had a chance to buy it - cheap - about 30 years ago. Drat & I should'a done it. Some well heeled aging Dead head would probably have paid a fortune for that relic. Oh well.... sic semper estimated profits.

    In any case this is all a thousand times bigger than the sort of system they're trying to hash out in this discussion so I'll butt out & leave 'em to it.

    0 Not allowed! Not allowed!

  20. #20
    Supporting Member The Dude's Avatar
    Join Date
    May 2010
    Location
    Sioux Falls, SD
    Posts
    5,035
    Thumbs Up/Down
    Received: 13/0
    Given: 8/0
    Sorry for , but one more quick interesting tidbit. I found a graphic of what speakers did what in the system. It's certainly an unconventional approach to live sound.

    Click image for larger version. 

Name:	WallOfSound_Sketch.jpg 
Views:	28 
Size:	485.0 KB 
ID:	48952

    0 Not allowed! Not allowed!
    “Yeah, well, you know, that’s just, like, your opinion, man.”

  21. #21
    Supporting Member jmaf's Avatar
    Join Date
    Apr 2009
    Location
    BSB-DF
    Posts
    1,315
    Thumbs Up/Down
    Received: 2/0
    Given: 1/0
    Some of these look like decent projects.

    Something like this could even accommodate a stereo out from chorus or delays on the pedalboard.

    0 Not allowed! Not allowed!
    Tube Amp Resources in Brazil: Valvulados.com

  22. #22
    Old Timer
    Join Date
    Feb 2010
    Location
    Just south of Bawlmer, Merlin
    Posts
    2,300
    Thumbs Up/Down
    Received: 17/1
    Given: 19/0

    You don't know what it's like to have Attention Defi... hey look, there's a squirrel!

    Way
    Quote Originally Posted by Leo_Gnardo View Post
    In the lower photo you'll see....
    Because I've lived under a rock all my life, I was about to ask... but found the answer myself.
    Click image for larger version. 

Name:	209081.jpg 
Views:	28 
Size:	212.7 KB 
ID:	48953

    We now return to the program in progress...

    -rb

    0 Not allowed! Not allowed!
    Those Who Hear Not the Music Think the Dancers Mad
    - Anon (multiple citations predate Friedrich Nietzsche)

  23. #23
    Senior Member
    Join Date
    May 2013
    Posts
    168
    Thumbs Up/Down
    Received: 2/0
    Given: 2/0

    0 Not allowed! Not allowed!

  24. #24
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,246
    Thumbs Up/Down
    Received: 9/0
    Given: 1/0
    I broadly categorize guitar players into two camps; Ones that steadfastly refuse to mic up their amps and rely on a narrow death-ray of sound from a loud setup to deafen one side of the audience, and ones that use the PA for the 'heavy lifting' and have a balanced sound and low-to-moderate stage volume. That doesn't mean to imply that the latter don't have larger setups, it's just that they don't run them to military levels. I have a customer with a 200w 4xKT88 amp and 2 2x12" cabs. I set it up with him to the level he has live and I had to ask him twice if he was certain that's where he has it - I measured just a little over 12W. All of his drive and EQ comes from his pedalboard. I have another setup that was used two years ago at the Reading festival, a Tone King Imperial used clean, again with all the drive from pedals. I checked the output and it was peaking at 9W. The owner asked me if he could turn it up (he usually has it at about 3 1/2 to 4 on the lead channel). He got the volume to 8 and said he'd never had it turned up so loud. This is a guy that plays all over the world to some very large crowds.

    By contrast some of the pub setups fall into the first category. A few weeks ago I had a 100w stack with 2 4x12" cabs and a boost pedal that made 156w. The guy said he always plays it at that level regardless. It was way to loud for me even with my best ear defenders (used for marshalling jets on aircraft carriers).

    So, a pedalboard-sized amp comes down to what you want to achieve. Bear in mind that a typical Marshall 100W amp will deliver about 80W before clipping. If your sound comes from pedals and you just need some volume, are you relying on numbers to come up with a power output; is 50w-100w what you actually need? Most players I see are actually running about 18-20w actual clean volume that rely on pedalboards for sound. That's a big difference in sizing, power requirements and heat dissipation.

    0 Not allowed! Not allowed!

  25. #25
    Old Timer olddawg's Avatar
    Join Date
    Dec 2007
    Location
    Carlsbad, CA and Kona, HI
    Posts
    2,607
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Quote Originally Posted by Mick Bailey View Post
    I broadly categorize guitar players into two camps; Ones that steadfastly refuse to mic up their amps and rely on a narrow death-ray of sound from a loud setup to deafen one side of the audience, and ones that use the PA for the 'heavy lifting' and have a balanced sound and low-to-moderate stage volume. That doesn't mean to imply that the latter don't have larger setups, it's just that they don't run them to military levels. I have a customer with a 200w 4xKT88 amp and 2 2x12" cabs. I set it up with him to the level he has live and I had to ask him twice if he was certain that's where he has it - I measured just a little over 12W. All of his drive and EQ comes from his pedalboard. I have another setup that was used two years ago at the Reading festival, a Tone King Imperial used clean, again with all the drive from pedals. I checked the output and it was peaking at 9W. The owner asked me if he could turn it up (he usually has it at about 3 1/2 to 4 on the lead channel). He got the volume to 8 and said he'd never had it turned up so loud. This is a guy that plays all over the world to some very large crowds.

    By contrast some of the pub setups fall into the first category. A few weeks ago I had a 100w stack with 2 4x12" cabs and a boost pedal that made 156w. The guy said he always plays it at that level regardless. It was way to loud for me even with my best ear defenders (used for marshalling jets on aircraft carriers).

    So, a pedalboard-sized amp comes down to what you want to achieve. Bear in mind that a typical Marshall 100W amp will deliver about 80W before clipping. If your sound comes from pedals and you just need some volume, are you relying on numbers to come up with a power output; is 50w-100w what you actually need? Most players I see are actually running about 18-20w actual clean volume that rely on pedalboards for sound. That's a big difference in sizing, power requirements and heat dissipation.
    I run into this conundrum constantly. I generally, anymore, use a (maybe) 20 watt open back combo with one inefficient 12” speaker and a speaker attenuator so I can crank it and (maybe) mic it slightly. The guy across from me plays an Ibanez with EMGs into an old VHF wireless into a processor rack into a Marshall rack preamp into the main amp input on a JCM 2000 into an oversized 4x12” sealed cab... AND uses a DI into the PA off of the preamp. I say in small clubs use a small amp with a equivalent extension cab on the other side each. Automatic stage balance and level. But it will never happen. The guy has to have HIS rig to get HIS tone and has absolutely no conceptions how the pile actually works together. That the VHF wireless is a white noise generator. That the wireless and the buffer on the a/d converter on the processor doesn’t care about his EMGs. That a rack preamp isn’t necessary. I doubt that 100 watt JCM2000 ever gets pushed past 20 Watts. Certainly not clipping. But it’s one hissy effected bucket of bees going into it most of the time, lol! The damn pig of a cab is VERY directional so it hard to hear unless you are standing in front of it. I hate the sound of it in the monitors. But it’s always like this. Guitarist get pissed off if you try to explain anything to them. It’s like “speak English!” Or.. but “but the preamp has a tube in it”.

    0 Not allowed! Not allowed!

  26. #26
    Old Timer
    Join Date
    Feb 2010
    Location
    Just south of Bawlmer, Merlin
    Posts
    2,300
    Thumbs Up/Down
    Received: 17/1
    Given: 19/0
    Quote Originally Posted by olddawg View Post
    The guy has to have HIS rig to get HIS tone and has absolutely no conceptions how the pile actually works together....But it’s always like this. Guitarist get pissed off if you try to explain anything to them.
    That personality disorder is not exclusive to guitarists. Hell, I play with a fiddler who reminds me of your bud.

    -rb

    0 Not allowed! Not allowed!
    Last edited by rjb; 05-27-2018 at 07:36 AM.
    Those Who Hear Not the Music Think the Dancers Mad
    - Anon (multiple citations predate Friedrich Nietzsche)

  27. #27
    Old Timer J M Fahey's Avatar
    Join Date
    Oct 2007
    Location
    Buenos Aires, Argentina
    Posts
    10,046
    Thumbs Up/Down
    Received: 56/0
    Given: 59/2
    Well, here it´s different, in Argentina people play LOUD, everywhere, from Pub to Stadium.
    Very good reason behind that being that both we have very good drummers all over the place and they are respected and given free reign.
    Best ones even play in more than one band, go figure, and nobody complains; my granddaughter´s Father plays in 3: a Metallica type band, a Punk one, he plays full blast in both, and a modern Techno Pop one, where he plays somewhat softer, because much of the Music is synthetic Notebook-into-PA stuff. And even so .....

    So they *do* play loud, nobody even dreams of asking them to play softer, and rest of musicians simply gear up to match them ... and rise own volume as needed.

    That means at least a 2 bottle (6L6 or EL34 of course, 6V6 are unknown here and "EL84 are for sissies") amp full blast at least into a "good" 12" (think Celestion G12T - V30 ; Eminence Legend or one of my own 12") preferrably 2 x 12" combo (Laney/Peavey/Crate) or straight into a 4 x 12" ... the "kid´s dream made true".

    My own bread and butter amp, sold steadily since 1970 or so, more than 10000 of them by now, is an SS 100W head into 2 x 12" cabinet.
    Which of course can be used at any level keeping sound the same, obviously all Tone comes from preamp, not much Mojo in 2N3055 or TIP142/147
    That said, it also has a "sweet spot" and I chose it to be around 6 or 7 Volume setting which means "quite loud" and that so "Musicians use it as-if it were a Tube amp".

    0 Not allowed! Not allowed!
    Juan Manuel Fahey

  28. #28
    Old Timer olddawg's Avatar
    Join Date
    Dec 2007
    Location
    Carlsbad, CA and Kona, HI
    Posts
    2,607
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Quote Originally Posted by J M Fahey View Post
    Well, here it´s different, in Argentina people play LOUD, everywhere, from Pub to Stadium.
    Very good reason behind that being that both we have very good drummers all over the place and they are respected and given free reign.
    Best ones even play in more than one band, go figure, and nobody complains; my granddaughter´s Father plays in 3: a Metallica type band, a Punk one, he plays full blast in both, and a modern Techno Pop one, where he plays somewhat softer, because much of the Music is synthetic Notebook-into-PA stuff. And even so .....

    So they *do* play loud, nobody even dreams of asking them to play softer, and rest of musicians simply gear up to match them ... and rise own volume as needed.

    That means at least a 2 bottle (6L6 or EL34 of course, 6V6 are unknown here and "EL84 are for sissies") amp full blast at least into a "good" 12" (think Celestion G12T - V30 ; Eminence Legend or one of my own 12") preferrably 2 x 12" combo (Laney/Peavey/Crate) or straight into a 4 x 12" ... the "kid´s dream made true".

    My own bread and butter amp, sold steadily since 1970 or so, more than 10000 of them by now, is an SS 100W head into 2 x 12" cabinet.
    Which of course can be used at any level keeping sound the same, obviously all Tone comes from preamp, not much Mojo in 2N3055 or TIP142/147
    That said, it also has a "sweet spot" and I chose it to be around 6 or 7 Volume setting which means "quite loud" and that so "Musicians use it as-if it were a Tube amp".
    Maybe making generalizations for a whole country is a reach .. and maybe it’s a cultural shift/demographic thing Juan? Back in the day we said “If it’s too loud you are too old!”. I remember my drummers using the back ends of their sticks and always having a stack, lol. But as far as clubs go where I play nowadays mostly... the drummer sets the stage volume and isn’t a monster (maybe because he’s old too ). If you are too loud you don’t get asked back. It’s about bar sales and not pissing off the owner/manager.. AND they are usually out front with a dB meter because of noise ordinances. You can’t drive people out and you can’t break the law. And with a “house” pa you have no idea how many times a sound guy has told me that the level on the FIVE WATT amp I was using cranked a while back had to come down. It’s why I started using an attenuator. Doesn’t seem to be a local phenomenon either. I live on the West Coast. Last week I was hanging out in NYC at Cafe Wah. The “House Band” had 3 Deluxe Reverbs. I was worried at first because in the bar light before they started I thought they were Twins and I was seated up front. Doesn’t mean large gear doesn’t have its place. Very large rooms or huge outdoor events, yeah. But I’ve had several bass players and even drummers say I’m to loud with my small open back rig and prefer to be next to the skyscraper on the other side of the stage. I just assume it was his closed back cab being more directional and me not being overcompressed with some bite. A lot of people tend to confuse bite and clarity with volume.

    0 Not allowed! Not allowed!

  29. #29
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,201
    Thumbs Up/Down
    Received: 3/0
    Given: 4/0
    Quote Originally Posted by tedsorvino View Post
    Thanks a lot but I just need a power amp since I already have a superb ss pedal pre amp and several other pedal stuff (klon etc).
    So just a plain POWER amp. Nothing more.
    And preferably something that will cost under or around 100 euros. Otherwise it has to be something really amazing.
    I knew I saw this somewhere, so I called a local musician & this is what he bought.

    MicroBlock 45 | Quilter Performance Amplification

    45 watts the size of a standard pedal.
    Power supply is 24 volts.

    0 Not allowed! Not allowed!

  30. #30
    Old Timer olddawg's Avatar
    Join Date
    Dec 2007
    Location
    Carlsbad, CA and Kona, HI
    Posts
    2,607
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Quote Originally Posted by Jazz P Bass View Post
    I knew I saw this somewhere, so I called a local musician & this is what he bought.

    MicroBlock 45 | Quilter Performance Amplification

    45 watts the size of a standard pedal.
    Power supply is 24 volts.
    Quilter MicroBlock 45 45W Guitar Amp Head https://www.amazon.com/dp/B06XDYB3QG..._CmYcBb6RERWK0

    Yeah I was going to second that... the only issue is the power supply is larger than the pedal. It’s like a laptop supply and probably why they don’t show it. But it comes with the pedal for that price.

    0 Not allowed! Not allowed!

  31. #31
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,246
    Thumbs Up/Down
    Received: 9/0
    Given: 1/0
    The TPA3116 boards are pretty cheap - I've seen them sold 'cased' (by Breeze Audio) at around £25 or less. 50W+50W but they may be configured to 100W mono. Banana outputs but connections to the board are by flying leads so should be swappable to 1/4". You still need a hefty PSU. I got a 24v 7A unit the size of a laptop supply but intended for a printer - cost about £1 from a boot sale.

    0 Not allowed! Not allowed!

  32. #32
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,201
    Thumbs Up/Down
    Received: 3/0
    Given: 4/0
    Quote Originally Posted by olddawg View Post
    Quilter MicroBlock 45 45W Guitar Amp Head https://www.amazon.com/dp/B06XDYB3QG..._CmYcBb6RERWK0

    Yeah I was going to second that... the only issue is the power supply is larger than the pedal. It’s like a laptop supply and probably why they don’t show it. But it comes with the pedal for that price.
    The gent that I spoke with keeps the Quilter & the power supply at his cabinet.
    There really is no need to have it on the pedal board.

    0 Not allowed! Not allowed!

  33. #33
    Senior Member
    Join Date
    May 2013
    Posts
    168
    Thumbs Up/Down
    Received: 2/0
    Given: 2/0
    Quote Originally Posted by J M Fahey View Post
    That said, it also has a "sweet spot" and I chose it to be around 6 or 7 Volume setting.
    Hi Juan Manuel, may I ask what is the main reason of this sweet spot in your SS amp?

    0 Not allowed! Not allowed!

  34. #34
    Junior Member
    Join Date
    Mar 2008
    Posts
    17
    Thumbs Up/Down
    Received: 0/0
    Given: 1/0
    Finally I ordered an LM3886 board mono PCB

    https://www.ebay.com/itm/HiFi-LM3886...53.m2749.l2649

    with the appropriate rectifier board (i may use just two capacitors instead of four in order not to choke the amp so much).

    https://www.ebay.com/itm/Dual-Power-...53.m2749.l2649

    It seems an affordable and ok size wise solution.
    I think I have a +-25V transformer somewhere. Maybe it will be more like a small rack.
    There is this schematic
    http://www.generalguitargadgets.com/...lm3886_amp.pdf
    and excellent advice and ideas in here
    Elliott Sound Products - The Audio Pages (Main Index).
    I will follow the current - mixed mode feedback in order to raise the output impedance.
    As I said No need for preamps etc.

    Thanks for the help and the ideas

    0 Not allowed! Not allowed!

  35. #35
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,246
    Thumbs Up/Down
    Received: 9/0
    Given: 1/0
    Don't forget the heatsink requirements.

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 30+ watt amp the size of a pedal!
    By olddawg in forum Theory & Design
    Replies: 37
    Last Post: 03-07-2017, 02:43 PM
  2. What Small Router for guitar and pickups routing?
    By big_teee in forum Tools and Coil Winding Gear
    Replies: 61
    Last Post: 12-11-2013, 07:39 PM
  3. Replies: 33
    Last Post: 01-31-2012, 07:08 AM
  4. Small Tube Amplifier Conversion
    By JKowalski in forum Conversion Projects
    Replies: 23
    Last Post: 09-01-2009, 12:29 AM
  5. Tube Driver Guitar Pedal Power Adaptor
    By mitz in forum Guitar Effects
    Replies: 10
    Last Post: 10-02-2008, 06:40 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •