Class d pedalboard amp project

[Miyagi_83]

It happened sooner than I expected, but that's good.
I tested it like you said, Loudthud, and it appears to be behaving correctly on both sides. Is it safe to assume that the amp isn't blown, in that case?

[Loudthud]

I think it's safe to assume the amp is working correctly. The vast majority of the Class D chips will protect themselves against shorts on one or both outputs.

[Miyagi_83]

The vast majority of the Class D chips will protect themselves against shorts on one or both outputs.

This is good to know indeed. Thanks for the help.
Next stop - machining the enclosure and building an input stage. Stay tuned.

[Miyagi_83]

Good day, everyone.
I'm slowly getting round to putting this whole thing together. As I have mentioned, I want to add an input stage of sorts to be able to use this power amp with low-level signals, but because I also intend to use a cooling fan, I'm not sure how to arrange the power supply, noise from the fan being a consideration.
Should I run the voltage regulators in series or is it a better idea to make a parallel connection? Or maybe it makes no difference at all?
The voltage regulator for the input stage is arbitrary. I'm also considering having it before the fan supply and using an 18V regulator.
Any input will be appreciated.
M.

[Tassieviking]

I have not had any problems with it, I just havent used it since I blew up the last laptop power supply, I think the amp is still fine.
If you want to see an even smaller one there is a company selling tiny 30 watt poweramps that are 25mm x 25mm x 100mm.
Even their 50 watt pedal is nice with a VU meter on it.
https://svisound.com/index.php/products/amps-cabs

I found a picture of this tiny amp, it is just a basic 30watt amplifier module glued inside the metal box.
It would be really easy to make one the same.

[g1]

As far as the series or parallel regulators, I think parallel would be better.
It will reduce the current through the 12V reg., and possibly also reduce noise due to the fan current (which would appear at input of 9V reg.).

[Miyagi_83]

As far as the series or parallel regulators, I think parallel would be better.
It will reduce the current through the 12V reg., and possibly also reduce noise due to the fan current (which would appear at input of 9V reg.).

I'll go parallel then. Thanks for the suggestion, g1.

I found a picture of this tiny amp, it is just a basic 30watt amplifier module glued inside the metal box.
It would be really easy to make one the same.

Oh, man, it's so beautifully compact! I wonder what kind of glue that is.

[Tassieviking]

I imagine it's some sort of 2 part epoxy glue like Araldite.
I would have used a couple of screws myself.
Maybe they glued it down so it got some thermal contact to use the case as a heatsink, but I would think a small 30 watt class D amp would not generate much heat anyway.

The module is only 22mm x 26mm and under $10, 20 watts at 12V @ 4 ohm and 10 watts at 12V @ 8 ohm.
That is plenty for a practice amp, 10 watts into 8 ohm most likely means you run it easily on a wall wart if not a pedal supply.
Want an amp when you go camping ?, you could run it on a small solar panel with some rechargeable batteries.