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My preamp is a MiniDSP 2x4 HD. This gives me full EQ/correction/levels/crossover and volume control. I'm using optical input. The outputs are unbalanced, but I have no issues with noise or ground loop hum. Currently it sends L-R to my pair of V3 monos and then also a subwoofer out to a Crown...

I watched Dune Part 1 with the volume high (reference levels) using my monos and after 3 hours they were only a few degrees warmer (48c) than when set to ON for an extended period (46c). I'm running a 2.1 system so the bass is being shipped off to the subwoofer. Maybe my amps would be warmer if...

I have done this, but I only measured the outside case temperature. You can see my previous post to see the temperatures before adding paste. The short version is that adding paste made no difference in the external temp of the case. This may not be intuitive to everyone, but there's a good...

I checked the power and heat on my 2x V3 mono. I am connected through the RCA for all of these tests. Here's what I found: With both units set to OFF: 2.2w This is the power my power supplies waste when there is no demand. I'm not using the Fosi PS bricks, so they may be different. Both in...

I'll try to get FFT screen shots when I'm next able to test.

I assume most people in this thread are also watching the main Review thread, but I did some more testing last night with 2x mono on a single power supply and posted the results over there...

Follow up on my previous test with 2x mono on my own 48v 10A power supply. This is without the power filter that Fosi will be supplying. I pulled out my calibrated mic and took some measurements 1m in front of my Right speaker. 1. Both off: 35.6 dBA 2. Both powered on: 40.8 dBa - The primary...

This is a class AB amplifier. It will be much less efficient than the V3 Mono which is class D. For the same wattage, the Neumann needs to dissipate much more energy, hence the very large heatsink.

This is a known issue that Fosi has addressed: https://www.audiosciencereview.com/forum/index.php?threads/fosi-audio-v3-mono-amplifier-review.53474/page-53#post-1955204 The filters they are providing with the 10A power supplies are to address this issue.

fyi, As an experiment I tried running 2x monos on a single 10A power supply (my own high end 48v PS, not the one Fosi supplies), and the noise was surprisingly loud. Not speaker damaging loud, but certainly could not be ignored. Not a big deal for me as I have plenty of power supplies, but I...

Got my pair installed today running each with its own power supply. I designed and printed a cradle that holds both amps and my DAC in my media cabinet. I oriented them vertically to give a little more room for them to breath while fitting into the space I have for them. So far they sound very...

My 2x Mono (no PS) arrived today. Exactly one week after ship notification (to MN).

I'm in MN and the tracking I received last week shows delivery in two days (Thursday)

The picture is hard to read, so I thought it looked like both big resistors are in parallel and connected to the power jack, but I might be wrong. Being a Zobel network is a solid alternative. Considering Erin's Audio Corner fried one of his units doing test tones, it is not impossible to...

I'm pretty sure they're using the big resistors in conjunction with the NTC thermistor for inrush limiting. I suspect the white relay is used to bypass the inrush protection once the bulk capacitors are near full voltage.

Those two large resistors are designed to protect from current inrush when applying power. It appears they previously used SMD resistors which (to my eye) are obviously undersized given the bulk capacitance used in this design.

#293 Shipped. 2x Mono no PS.