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Re: Gonna Try Building a 1kW Class D Amp for Only $396
danmagicman7 #335078 01/20/11 11:43 PM
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Originally Posted By: danmagicman7
Since this amp seems very simple to put together, if you really wanted to go DIY you could do component upgrades. Most of the time they are transformer or capacitor upgrades. Some believe that component upgrades can push "cheap" equipment with good circuitry designs into something that's great. Tried looking up mods for this amp, couldn't find much.


Chris is right, you have to be careful with Class D type amps. Tom will upgrade the boards to whatever caps you want. You can either have him buy them, or mail the caps, etc. to him. He'll do the soldering for you. I asked Tom about an upgrade of the power supply caps from 4700uF caps to 10000uF caps. He said each one would cost about $15 more because he does not buy them in bulk. He said he would not recommend spending money on that though because it was just not worth it (I would not really hear any difference). I trusted his opinion and went with the stock caps. He did say that the toroid upgrade was a wise choice for multiple amps.

I can tell you from looking at what is on the board, these are high quality components.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #335097 01/21/11 03:04 AM
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Took about 2 hours, and it isn't the prettiest thing now, but I have it all wired now except for the toroid. Hoping it will come tomorrow of Saturday. I used 12 gauge wire to connect the power supply to the amps, and it was a tight fit (it's where I spent most of the time). I'll probably go with 14 gauge in the permanant installation.




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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #335098 01/21/11 03:12 AM
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Very cool Steve! I have always wondered about DIY amps.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
fredk #335099 01/21/11 03:18 AM
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Kewwl! thanks for posting pictures, Steve. It looks like something I might want to try as well.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
Adrian #335101 01/21/11 03:49 AM
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This isn't looking too bad. I was originally thinking you had to solder all of the pieces onto the boards. I may have to give something like this a try.

Re: Gonna Try Building a 1kW Class D Amp for Only $396
CatBrat #335103 01/21/11 03:53 AM
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yeah, if I'm not mistaken they are in some type of screw or tensioned socket? Just when you get this thing all juiced up and the capacitors are full, don't touch anyting. smile


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SirQuack #335104 01/21/11 03:56 AM
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Nice! Where'd you get the RCA connectors?


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
SirQuack #335105 01/21/11 03:58 AM
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Yes, the caps are my main worry Randy. I'll probably have to let it sit for a long while unplugged to let the caps discharge before I'm ready to take it apart for the final build.

The sockets are all screw down. Real easy.

Once the toroid arrives, my plan is to test it out first using my iPhone as the input, and my old VP150 as the sacrifical lamb before I even think about hooking it into my system. I'll test one channel at a time with the 6 ohm load of the VP150 and make sure everything looks good. If it all checks out, I'll hook it into my main system and have it drive both M80s using the AVR-3806 pre-outs.


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Re: Gonna Try Building a 1kW Class D Amp for Only $396
Ken.C #335106 01/21/11 03:59 AM
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Originally Posted By: kcarlile
Nice! Where'd you get the RCA connectors?


I just cut apart an old cable I had lying around for now. I'll buy RCA connectors with solder tabs when I'm ready for the permanent installation.


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Gonna Try Building a 1kW Class D Amp for Only $396
SRoode #335107 01/21/11 04:04 AM
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That's what I figured, but I was thinking the wires inside must have been TEENY.


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