Bass amp

dan stanton · 9th February 2010, 11:25 PM

Hi all,
I am looking to build a practice bass amp, 30 watts rms, or so. I would like to keep it simple, using op amps for pre and power sections. I enjoy building, but don't know squat about design. Any help is appreciated.

dan stanton · 10th February 2010, 12:11 AM

Gues wrong forum, sorry!

Cal Weldon · 10th February 2010, 12:14 AM

I usually post when I've moved a thread but the time is short today.

dan stanton · 10th February 2010, 09:29 PM

Guess I get no help anyways.

Minion · 11th February 2010, 12:05 AM

Well any good Bass amp is all about haveing a Good eq on the amp , so for a Simple bass amp with an eq you can just built a lm3886 for the Power amp , maybe use a BA3812 EQ chip to make a 5 Band graphic EQ and maybe a simple opamp at the front end as a Buffer with a Pot to controll the gain and maybe some clipping diodes if you are into a distorted fuzzy bass.....

As Far as there being an easy to build DIY Bass amp Project with detailed instructions on the net I don"t think you will find one nor do I know of any Kits .....

Good luck

Racket Scientist · 11th February 2010, 04:17 AM

For bass, the tone shaping isn't as big an issue as for guitar - they try to run a fair amount of power fairly clean. You might try finding schematics of one of the older Peavey bass amps to look over - they tended to use fairly standard op amp design in an intelligent manner. I will say that especially with solid state you're likely to spend more building your own than just buying a used commercial unit, so do it only if you just want to build. I would also consider building something at least 100 watts, as this is about as small as is practical for actual playing use in many situations, just turn down for practice. A simple, used solid state bass amp with between 30 and 100 watts can sometimes be found (Craigslist, pawn shops, Ebay) for less than $150. If you find one not working and fix it, you're talking less money than that.

dan stanton · 11th February 2010, 05:07 AM

Minion, yes the build is the idea.
Racket, I have the original Peavey Bass. Says nothing else on it. 210 watts. Best i ever found.
And to any one who cares......I'm looking for a bass amp with one chip each for pre and power amps. I got the skill to build, not design. And, yes, way cheaper to build than even to buy used. And much more fun.

9th February 2010, 11:25 PM	#1
dan stanton diyAudio Member Join Date: Feb 2010 Location: Houston, TX	Bass amp Hi all, I am looking to build a practice bass amp, 30 watts rms, or so. I would like to keep it simple, using op amps for pre and power sections. I enjoy building, but don't know squat about design. Any help is appreciated.

10th February 2010, 12:14 AM	#3
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	I usually post when I've moved a thread but the time is short today. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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10th February 2010, 12:11 AM	#2
dan stanton diyAudio Member Join Date: Feb 2010 Location: Houston, TX	Gues wrong forum, sorry!

10th February 2010, 09:29 PM	#4
dan stanton diyAudio Member Join Date: Feb 2010 Location: Houston, TX	Guess I get no help anyways.

11th February 2010, 12:05 AM	#5
Minion diyAudio Member Join Date: May 2006	Well any good Bass amp is all about haveing a Good eq on the amp , so for a Simple bass amp with an eq you can just built a lm3886 for the Power amp , maybe use a BA3812 EQ chip to make a 5 Band graphic EQ and maybe a simple opamp at the front end as a Buffer with a Pot to controll the gain and maybe some clipping diodes if you are into a distorted fuzzy bass..... As Far as there being an easy to build DIY Bass amp Project with detailed instructions on the net I don"t think you will find one nor do I know of any Kits ..... Good luck

11th February 2010, 04:17 AM	#6
Racket Scientist diyAudio Member Join Date: Jan 2010	For bass, the tone shaping isn't as big an issue as for guitar - they try to run a fair amount of power fairly clean. You might try finding schematics of one of the older Peavey bass amps to look over - they tended to use fairly standard op amp design in an intelligent manner. I will say that especially with solid state you're likely to spend more building your own than just buying a used commercial unit, so do it only if you just want to build. I would also consider building something at least 100 watts, as this is about as small as is practical for actual playing use in many situations, just turn down for practice. A simple, used solid state bass amp with between 30 and 100 watts can sometimes be found (Craigslist, pawn shops, Ebay) for less than $150. If you find one not working and fix it, you're talking less money than that.

11th February 2010, 05:07 AM	#7
dan stanton diyAudio Member Join Date: Feb 2010 Location: Houston, TX	Minion, yes the build is the idea. Racket, I have the original Peavey Bass. Says nothing else on it. 210 watts. Best i ever found. And to any one who cares......I'm looking for a bass amp with one chip each for pre and power amps. I got the skill to build, not design. And, yes, way cheaper to build than even to buy used. And much more fun.

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