SS power amp

[drew]

LRS-350-48
48 volts 7.3 amps

[roberto]

I am less happy about the fan in the power supply, which will never be noticed on stage, but is audible in my quiet room, and therefore a bit annoying. I may wire a fan on/off switch.

Don't. Add a temperature proportional speed controller for the fan instead, with something like this: https://www.mouser.com/ds/2/268/21448c-63501.pdf

[roberto]

does it need a 4 ohm speaker to perform at it it's best? that put me off as I never use single 4 ohm speakers.

You can choose the power amp to have the power you need at the impedance your cabs are set, then you can choose even a smaller power supply.

Don't forget that you can find modules with integrated power supply (I will show you my latest one DAC and class D power supply in the same enclosure).

[M Fowler]

My project Class D 600w mono with 48v Meanwell PS. Uses separate 12AX7 preamp.

23172681_10209779357472226_6446156116731051329_n.jpg

23167649_10209779358632255_8331311469949429653_n.jpg

[xtian]

You can choose the power amp to have the power you need at the impedance your cabs are set, then you can choose even a smaller power supply.

Don't forget that you can find modules with integrated power supply (I will show you my latest one DAC and class D power supply in the same enclosure).

Please do.

[roberto]

The price of this module jumped up alot during the last years, but this is the module I was talking about:
http://connexelectronic.com/wp-content/ ... 3020v4.pdf

I use it with the DAC for my Klipsch.
Will take some photos when I'll be back home.

[xtian]

I’m still enjoying the performance of the amp I built into my 2x12 cab, but the idea of assembling it on an aluminum backplate was short sighted—too many rattles. Going to have to rebuild or make external to cab.

[xtian]

Oops, I did it again. Built the same SS amp and PSU into a nice 1x12, solid pine Fender cabinet with a Jensen neodymium Jet Tornado. Great sound, 27 pounds.

amp3.jpg

amp2.jpg

[JazzGuitarGimp]

This is an interesting discussion indeed. And quite timely, as I have come to the same conclusion:
https://tubeamparchive.com/viewtopic.php?f=6&t=31082

[roberto]

Just one thing xtian, I'd put the modules on the top (or sidetop) side, in order to avoid to collect too much dust.

[roberto]

Please do.

I've found this ol post of mine: https://tubeamparchive.com/viewtopic.ph ... 61#p248061