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Good to know, thank you. Not sure how this simulates a lower or higher output impedance. For pure resisistive loads the output impedance is completly irrelevant as long as it is static (despite form a sligth decrease in signal level). As your reach the skinn depth limit within the audio band...

I don't have a problem with the AHB2, just doing some thougth experiment on possible improvement. For best overall efficiency, you need high efficient speakers. With my 99dB/W speakers I'm basically allways below 1 Watt and only the idle power consumption of the amplifier is important. And the...

Every stand of the wire is insulated individually with a thin layer of varnish like in a transformator. This gives you lower impedance at high frequencies due to reduced skinn effekt. Last year I have been developing a small inductive heater running at 100kHz and we got by far the lowest...

I have not aseked Purify yet. First I like to be sure that it is acctually a good idea before I bother them. By now I use the HF litz wire for the speakers and starquad for line signals.

Well, an ideal amplifier has a zero output impedance, and remote sensing compensates the wire impedance. So you are closer to the "ideal". I was just thinking about how can my setup be impreoved. But you are totally rigth, 0.1db in FB is totally irrelevant, given there are much larger factors...

Yes, this was also what I was thinking, but I'm allways open for new inputs or opinions. Well in this case confirmation. BTW, I'm running high efficeincy speakers (99dB/W) with 15'' base, so I'm a bit fanatic on giving the amp the possibility to accelerate and slow down the large membrane as...

Hi all Thank you for the input. Missing sense wire or loose connection is not an issue as I can add a small resisotr (e.g. 10 Ohm) on the amplifier as a backup. Wrong polarity is also not an issue with SpeakOn connectors. Stability on the other hand.... well lets hope Bruna has build in enougth...

So I'm running the AHB2 and I'm pretty happy with it. However, it has a relatively high output impedance: The 23 mOhm at low frequency are not too bad, but it rolls of quickly above 500 Hz. For the speaker cable I'm using a high frequency litz wire with 1050 strands of 0.1mm wire (8.24mm^2)...