Suggestions for new amp chip.

[soundNERD]

I seem to always use the LM3886 chip, probably because it is the most popular chip avaliable. I would like to move onto something more powerful and that sounds even better. Are there any other lines of chips that are somthing easy to try?

I would like to try something class d even...

[Steve Eddy]

Originally posted by soundNERD
I seem to always use the LM3886 chip, probably because it is the most popular chip avaliable. I would like to move onto something more powerful and that sounds even better. Are there any other lines of chips that are somthing easy to try?

I first played with the monolithic power opamps back in the early 90s but when I moved on to hybrids (circuits which combine integrated and discrete circuit components built on a ceramic substrate) I haven't looked back.

My favorite has been the PA-16 from Apex Microtechnology.



The PA-02 is the same as the PA-16 but in a TO-3 style case.



If you need more power, the PA-03 can take up to +/- 75 volt supplies and swing up to +/- 30 amps of current.



None of them are cheap. The PA-03 will set you back $500. So you're looking at $1,000 for two channels. The PA-02 and PA-16 are a bit more reasonable at about $60 to $90 each respectively, but may not give you as much power as you want.

se

[li_gangyi]

Which is a lot more compared to a chip amp...maybe he should try a discreet design like the P3A...I tried it on breadbaord...sounds good...

[Variac]

The PA 12 seems to be over 120watts and about $75

[soundNERD]

No, you sure are right, those chips aren't cheap!! Choke Choke!!

What is the P3A that lil_gangyi was talking about?

And in my original post, i guess i could have said, a new gainclone to try. But thanks for the suggestions.

[audioPT]

The P3A is THIS

From Rod Elliott, a friend in Australia

[soundNERD]

Actually, I just looked at the power ratings for that chip. I can't even imaginge 2000W from 2 chips sitting in my stereo. After I come up with 1000 dollars to experiment (anotherwords, never) it would sure suck to burn up a $500 chip!! Besides, wouldn't the heatsink set you back pretty far too? I would think a 1000W chip can sure crank out the heat.

I would like to, as I said above, try class D amps too/ How about this:

TPA3001D1
http://focus.ti.com/docs/prod/folder...tpa3001d1.html

It is a heatsink free Class D 20W amp. I like the idea of no heatsink and the circuit doesn't even look that hard to build. Also, class d has less distortion and sounds clearer than class a/b right? Just wondering, but is there a class c? if so, what kind of amps are in that class.

I think I am going to use these chips for my computer speakers. The chip above will be for the subwoofer, and the chips below for the other 2 speakers:

TPA3004D2
http://focus.ti.com/docs/prod/folder...tpa3004d2.html

That chip is also class d and does 12W/channel. It also has a digital volume control built in with a controlled line out for headphone amps, so i could connect the subwoofer amp to the cicuit there.

I would get 12Wx2 + 20W I don't know too much about class d, but those ratings are for 8-ohm speakers. would I get more power into a 4-ohm spekaer?

Thanks, Mike

[ukram]

dual LM3886 + integrated DAC with SPDIF input would be nice sigle chip solution for eliminating gound loop problems. But as far as i know there is no such thing.

[Dirk]

TPA3001D1: pin distance = 0.65 mm
TPA3001D4: pin distance = 0.50 mm

How interesting the chips may look, I cannot solder these things

Dirk

[carlosfm]

How about the TDA7293?
More power than the LM3886, and with two in parallel you should have no problems with 4 ohm speakers.
Although I have doubts it sounds as good as the LM chips.