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Old 21st June 2005, 06:16 PM   #1
raszvan is offline raszvan  Russian Federation
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Default what amp should i build

i want to build an amp...i tryed to build the av400 with a friend...got it working..but not for long ...the irf's blow apart in a few days..i really don't want to build another av400...so i'm wondering..what amp should build now..
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Old 21st June 2005, 10:12 PM   #2
jaycee is offline jaycee  United Kingdom
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Perhaps you should consider a simpler amplifier if your expertise in constructing circuits isn't too good. High power amplifiers are very unforgiving of mistakes.

I would recommend you try Rod Elliot's P3A amplifier.
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Old 21st June 2005, 11:06 PM   #3
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If power isn't much of a concern try some well documented DIY project such as a Zen 4 From Nelson Pass or a Gain Clone for starts.

Other well documented projects on these forums are a mini Aleph also from NP.

For any of these you will find PCB at a low cost plus the valuable assistance from members of DIYaudio.com

Others such as Rod Elliot's are good starters project as jaycee suggests but you wont find much help or assitance from other members on these forums.

Want to get more involved? have a look at the Krell thread on this forum which is a new effort. There are a number of experimented members participating. This project will bring you awsome 50W of a classic class A power amp.

Have fun...
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Old 22nd June 2005, 07:49 AM   #4
Join Date: Jan 2005
Why not try this: http://hififorum.knaak.dk/Tekko/subw...darlington.JPG <-- my modified version, or: http://hififorum.knaak.dk/Tekko/subw...eg/schema1.JPG <-- the original schemo
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Old 22nd June 2005, 07:55 AM   #5
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Ifyoucan hold your breath for a week or so, I'll have an amp of 150W /8 ohm which will redefine price/performance.

I just need to get my website up.

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Old 23rd June 2005, 03:34 PM   #6
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What's wrong with the AV400? I had trouble only because of my carelessness. It may be a bit hot but 2 8cm computer fan that cost no more than $5 /pcs will solve the problem. No thumb at start up.

I think it's worth trying.
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Old 23rd June 2005, 03:42 PM   #7
Leolabs is offline Leolabs  Malaysia
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Try Gainclone too
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Old 23rd June 2005, 08:26 PM   #8
raszvan is offline raszvan  Russian Federation
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well....i want power...>200W(8 Ohm)...i'm good at making pcb's...but i'm not so good at all the small things in the circuit......anyway...i have have a few diy amp's at home..2*tda7294(100w..1%THD)...2*STK(120W 0.008%THD..and 3 amp's with irf's...they work great...but they have only 120W at 8 OHM..and 1%THD...
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