Eden wt 400 issues

[ibanez7]

Wt 400

I'm using a 4x10 400 watts 4ohms,tried different cab,I think the amp is not putting out enough power ,thats why i thought there might be a internal mod I can do to the amp itself.

[J M Fahey]

That amp is a beast. 400W into 4 ohms is a lot.
Tweaking electronics you *might* get 1dB extra; tweaking speakers you may get 3 to 6dB.
If possible, test your head with a fridge size 2x15" (Peaveys are relatively inexpensive and great) or, if you know a soundman, ask him to let you test it with a couple 15" woofers.
For a low cost solution, consider building a large box with 2xEVM15L or the equivalent Eminence clone (2.5" aluminum ribbon voice coil, heavy magnet).
It will not only be loud but punchy, and will stand up front in the mix , way over other "theorically better" speakers.
A couple months ago, a customer, who has a WT550, came in despair .
He had an SWR "Goliath" something box, 2x10"PAS+Tweeter, 8 ohms total (16 ohms each speaker), he was not loud enough, had burnt one of them.
Burnt as with a blow torch, a hole in the voice coil form you could put a finger through, no kidding.
Of course, it was Thursday, he *had* to play on Saturday, he was an anxious Musician (aren't they all?).
Since there was *no way* the replacement kit would arrive on time (we are in Buenos Aires) I hand wound a replacement coil for him; round wire, I can't edge wind aluminum ribbon at home, and he saved the weekend.
Later we repaired it properly, he sold it to a happy Fusion player where it belongs, today he uses a 2x15" for oomph, a 4x10" for slap, everybody's happy.
2x10" for Metal? ... what was he thinking?

[Steve Conner]

Yep, that's the rule with bass rigs: The harder they are to move, the better they're going to sound.

I've tried a few, and my favourite was the Hartke VX215. It was relatively small and light for a 2x15". I could have done without the stupid silver trims on the speakers, but it sounded great.

The Peavey 410TX was good too, but when I first got mine (2nd hand) I found a problem that might be relevant to this thread. The first gig I used it at, I couldn't get any volume or bottom end from it, just useless farting. On closer inspection, it turned out that one of the woofers had gone open-circuit, and that also disabled the one it was in series with. So only 2 out of the 4 drivers were working, the cabinet was out of tune, and the amp was seeing 16 ohms. A recipe for disaster.

After fixing the faulty driver, the increase in volume and bass was terrific. I took it to a garage jam session, and it shook clouds of dust, even whole light fittings loose from the ceiling.

So, measure the impedance your cabinet is showing at the jack socket. It should be the same as, or a little less than what it says on the nameplate. If it's almost twice the nameplate value, you've blown a speaker.

[ibanez7]

wt 400

I think my amp has'nt got the eden this mod,can you look at the diagfram and let me know what I need to change,resisitors,caps etc.

[J M Fahey]

What are those "mods" supposed to do?

[ibanez7]

wt400

I think increase output by x40 watts I'm guessing

[J M Fahey]

Well, they do not.
And even *if* they did, you can't hear the difference between 400 and 440W (nor do I).
Please tell me what your actual setup is (what box you have) , what do the others use , so as to know who are you fighting with, whether it's a studio or you play live, what size room, how many people in the public, some idea of PA used (if any), type of music; in a nutshell, whatever can give us an idea as to the challenges you face.
We also need to know what kind of sound do you actually prefer: slappy/punchy/woofy/ultra-deep/middy, etc.
Otherwise we are shooting in the dark.
Thanks.

[Thor]

Unfortunately, the schematic links above appear outdated (vB upgrade I assume). Do any of you fine people that posted this a few years back have one to repost? (I fried 2 amps last week, a WT-400 was one of them.) A search here for the schematic brought me this close, anyway.
Thanks, Thor.

[g1]

reposting schematics

[Thor]

Thank you very much, well appreciated!