2x250 IRS2092 amp build

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Finally got this done and playing. Very simple build. If I can do it, so can you. I used this amp modual from Parts Express. http://www.parts-express.com/2x250w-...board--320-313
with a 45va Toridial form Antek.http://www.antekinc.com/an-10445-100...v-transformer/
It was thought I might be a little HOT but all said and done it puts out 64.6 volts under a load. Whew!
The PSU uses 8 per side caps from Apexjr. 2 bux per! 4700x 8 for 37000 per rail. I read a bunch but pretty much copied Hong's. I used a softstart module I got from ebay and a unit that turned 12vac to 12dc I bought from AJ. works like a charm to power a 12vdc fan and 12vdc truck light to show its on. Case is form Parmetal and was about $100. this is destined for my theater so I wanted it to blend. Feel free to ask questions.

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Re: 2x250 IRS2092 amp build

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Re: 2x250 IRS2092 amp build

BTW, nobody made a board big enough so I make my own from plexi.

[thekorvers]

Re: 2x250 IRS2092 amp build

Cool Arlis. I like what you did. Total cost + $350?

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Re: 2x250 IRS2092 amp build

Probably closer to $325. The case added a lot and this can be done with a lower va torodial but the 800 was out of stock so I went with the 1000. 600 would do fine. This build was to be overkill from the start. With a home made wooden box and smaller Toroid, it could be built much cheaper.

[WesL]

Re: 2x250 IRS2092 amp build

Very nice. I really need to edu-mah-cate myself on this stuff a bit more.

[Wolf]

Re: 2x250 IRS2092 amp build

The PSU uses 8 per side caps from Apexjr. 2 bux per! 4700x 8 for 37000 per rail. [/IMG][/URL]

You have them in series/parallel arrangement. That is 9400uF/'side'. Only parallel adds (doubles) capacitance. In series they will halve, but carry twice the voltage capacity.
Later,
Wolf

[hongrn]

Re: 2x250 IRS2092 amp build

Awesome Lowell! I was going to ask you about the amp's progress, but I'm glad it's done. Did you paint the case, or did you buy it anodized black?

Hong

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Re: 2x250 IRS2092 amp build

Anodized front, The rest is painted from the factory. Made all the holes with a step drill bit.

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Re: 2x250 IRS2092 amp build

You have them in series/parallel arrangement. That is 9400uF/'side'. Only parallel adds (doubles) capacitance. In series they will halve, but carry twice the voltage capacity.
Later,
Wolf

Are you sure about that. If so, then every PSU I have seen is wrong.
Its the same as Hong's http://techtalk.parts-express.com/sh...highlight=hong

[tomzarbo]

Re: 2x250 IRS2092 amp build

That's nice looking Lowell.

Stuff like this gets my juices flowing...There are so many fun aspects to the speaker/sound hobby, and I'd like to dabble in all of it!
I have a question, is the piece of plate metal between the Transformer and the amp in the second pic above there for some type of shielding, or as a heat shield from the amp?

TomZ

[scottsehlin]

Re: 2x250 IRS2092 amp build

Are you sure about that. If so, then every PSU I have seen is wrong.

Wolf is right with his capacitor math.

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Re: 2x250 IRS2092 amp build

That's nice looking Lowell.

Stuff like this gets my juices flowing...There are so many fun aspects to the speaker/sound hobby, and I'd like to dabble in all of it!
I have a question, is the piece of plate metal between the Transformer and the amp in the second pic above there for some type of shielding, or as a heat shield from the amp?

TomZ

Thanks Tom.
Yes, copper shielding between the Transformer and amp. It generates no sound at the speakers without input.

[donradick]

Re: 2x250 IRS2092 amp build

Very nice! IIRC, Neil Davis said the 2092 designs were cleaner than most of the other
Class D chipamps. Plenty of power for demanding sources like AC/DC and Wagner.

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Re: 2x250 IRS2092 amp build

Wolf is right with his capacitor math.

Here is another example. These are polarized caps. I used two of them with the + of one and - of the other joined to form the 'ground' for the amp.