Simple Stereo Audio Amplifier

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NoSnipeLimit

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Hi All,

Criticism welcome, actually encouraged :D (I dont think this is HiFi) Seeing as they use it in cars.

So I've been browsing the webs and found the TDA1558Q amplifier chip, it's a 4 channel 11w per channel amplifier, but you can bridge two of the channels to have 22w stereo. 
It's the the mute/standby pins, but I don't need that anyways :)

The circuit is dead simple.  4 Caps and the chip:

TDA1558_Q.jpg


As far as I understand one of the projects I read, you can use a 10k POT with dual input/output to have the two channels adjust together.
You can build a PSU circuit for this, I see you get some 12v 3amp transformers. 

However I was thinking of using a SMPS that also delivers 12v (3.5amp max)

Price Breakdown:
SMPS:  R115
TDA1558Q: R25-40 depending on where you buy.
Caps: ~R5-10 depending on rating
Connectors/POT:  ~R30

Given the above, what other options do i have for about R200?
I'm not going to be throwing parties or anything with this, it's just for powering PC speakers.
 
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