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TDA 7924 dual mono diy power amplifier.

IPunchCholla

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I’m considering DIYing this amplifier. After successfully making new (and better) crossovers for my speakers and resurrecting a Pass ACA. I thought I might turn my hand to building an amp. I had planned on doing a kit, but none were exactly what I was looking for. As I still need to improve my soldering skills and I have access to Fusion 360, I thought I might build one that was exactly what I want.

So this is based 99% on STI’s suggested application for running the TDA7294. The circuit circuit is one half of a dual mono setup. The only things I have changed are running it balanced, having a line out (that just uses half the balanced signal), and an LED circuit. It’ll be powered off an external supply. Heat is managed by the heat sinks on the Pass ACA, which are just slightly better than the equations suggest for running each channel at 1/10th load constantly.

Anyway, this is the circuit and I have the PCB layout finished, but I thought I would post it up here since I’m a newb and probably screwing up something obvious. Thank you for any pointers.

Patrick
 
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IPunchCholla

IPunchCholla

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I decided to use a THAT120X series op-amp for the differential input. They com in 0dB, -3dB, and -6dB options opening up using SE in the future and also keeping it closer to the reference circuit. Now I just need to work on getting 3D and spice models running for all the pieces.

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IPunchCholla

IPunchCholla

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Just posting up, because I've had time to make a couple revisions... PCB where I'm at now.

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