Home Brew Amp Ramping Advice

[Ben-The-Bass]

Hi, new to the site, found some intresting stuff Anyhoo i have a problem, i just bought myself a semipro homebrew 60watt amp, after a quick service it works and sounds great, but...when i turn it up past half way it begins to distort, this is great for guitar but not bass and i'm using it for bass. I believe the problem lies in that its based on a PA amp. Fortunatly it has a DI, an idea came to me, can i connect the DI to a mono power amp? I'm currently building a 400 watt cab for it, i'm no expert with electronics and i'm getting a little confused with it all, In conclusion, what will i need? (dont mind building a kit, there cheap and easy to build) I want to use the original amp circuitry beaucse it has a good EQ, i just want to ramp things up a bit.

Cheers
Ben

[Albert Kreuzer]

Yes, you can go from the DI output to the input of a power amp. If it (the first one) is a tube amp, keep a load connected to it (speaker or resistor) or pull the power tubes.

[Ben-The-Bass]

Yes, you can go from the DI output to the input of a power amp. If it (the first one) is a tube amp, keep a load connected to it (speaker or resistor) or pull the power tubes.

Thanks very much

[Ben-The-Bass]

Could somebody tell me what parts i need? i'm a little confused about the power supplies, rectifiers and such and how they should be matched. I'm looking at 400watts for a guide line.

Thanks
Ben

[Albert Kreuzer]

Hmmm... the kind of your question tells me that it may not be a good idea to build this yourself. How many amplifiers have you built yet? This is not a beginner project.

If you must, build two of these MOSFET power amplifier and bridge them into 8 Ohms.

In my bass rig I have a cheap studio PA, 2 x 250W bridged. Cost me less than the parts if I had bought them retail. Not worth the hassle (and time) to build such a thing IMO.

[Ben-The-Bass]

Hmmm... the kind of your question tells me that it may not be a good idea to build this yourself. How many amplifiers have you built yet? This is not a beginner project.

If you must, build two of these MOSFET power amplifier and bridge them into 8 Ohms.

In my bass rig I have a cheap studio PA, 2 x 250W bridged. Cost me less than the parts if I had bought them retail. Not worth the hassle (and time) to build such a thing IMO.

I've built ton's of electronic's kits over the years and a few headphone amps for guitar but never a proper amplifier. I've only built kits that come complete, hence i'm a tad lost on where to start but i have to start somewhere. This is something that really intrests me and i want the satisfaction of knowing i built it with my own hands, sure i could go out and buy one but where's the fun in that?

[Albert Kreuzer]

Ah, OK. I promise you'll have lots of fun building these (from my link above)
Just make sure your transformers, rectifiers and heatsinks are big enough.

[Ben-The-Bass]

Thanks for the link