Fosi v3 Mono Amplifier Reliability

[threej]

Have two USB-powered 120mm fans (generic from Amazon) set to medium speed --each beneath one V3 with about an inch between amps. They never get more than slightly warm, regardless of how hard I push them, but ran hot without fans. It concerned me enough that I ordered the fans immediately. I also switched from a shared PSU and added another Fosi 48V 10A PSU, with an extra filter to have one on each. These amps (fed by a ZD3 and ZP3) power A/D/S M15 speakers nicely, and I am very happy with them and with the sense that a reasonable sum can provide significant musical enjoyment. They have replaced Tandberg 3002a/3006a pre/power amps and the DAC in a Squeezebox Duet -- which, in today's dollars equate to a considerably greater outlay but which do not provide commensurate sound improvement, if any.

 

[Blew]

Have two USB-powered 120mm fans (generic from Amazon) set to medium speed --each beneath one V3 with about an inch between amps. They never get more than slightly warm, regardless of how hard I push them, but ran hot without fans. It concerned me enough that I ordered the fans immediately. I also switched from a shared PSU and added another Fosi 48V 10A PSU, with an extra filter to have one on each. These amps (fed by a ZD3 and ZP3) power A/D/S M15 speakers nicely, and I am very happy with them and with the sense that a reasonable sum can provide significant musical enjoyment. They have replaced Tandberg 3002a/3006a pre/power amps and the DAC in a Squeezebox Duet -- which, in today's dollars equate to a considerably greater outlay but which do not provide commensurate sound improvement, if any.

How much noise do the fans create?
The V3 Monos use the chassis as a heatsink, so they're designed to be much warmer than traditional amps.

If you can afford to spend a little extra, replacing the Squeezebox Receiver with a Raspberry Pi + piCorePlayer to attach to your ZD3 via USB is a significant improvement in capabilities to support > 48KHz, resampling, better wifi, and potentially DSP.

 

[threej]

If you can afford to spend a little extra, replacing the Squeezebox Receiver with a Raspberry Pi + piCorePlayer to attach to your ZD3 via USB is a significant improvement in capabilities to support > 48KHz, resampling, better wifi, and potentially DSP.

Time to pull out my old Rasperry Pi and try your suggestion. Thx.

 

[Connor1a]

How much noise do the fans create?
The V3 Monos use the chassis as a heatsink, so they're designed to be much warmer than traditional amps.

If you can afford to spend a little extra, replacing the Squeezebox Receiver with a Raspberry Pi + piCorePlayer to attach to your ZD3 via USB is a significant improvement in capabilities to support > 48KHz, resampling, better wifi, and potentially DSP.

Do you have a link with the tech directions to build something like this? TYVM

 

[threej]

Do you have a link with the tech directions to build something like this? TYVM

I can provide one: https://www.picoreplayer.org/

 

[threej]

How much noise do the fans create?
The V3 Monos use the chassis as a heatsink, so they're designed to be much warmer than traditional amps.

The fans, running on medium (middle of three speed settings) are inaudible. The V3s ran hot to the touch beforehand. Now they are tepid. I imagine, as with all things electronic, that less heat will be good for them. BTW, now have my Raspberry Pi up and running PiCorePlayer to replace the Duet