Forgot to add the amp does 22W in to an 8R load.
The 22W into 8 Ohms gives 13.3Vrms, since P = ( V x V / R )
Into 40 Ohms, that same 13.3Vrms gives P = ( 13.3 x 13.3 / 40 ) = 4.4W
In other words, for a voltage source type of power amplifier,
the output power varies inversely with the load.
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Any designs out there or commercial headphone amps that can deliver that sort of power?
Most seem to be limited to 1W, so I bought a module amp to test and find it very good
with loads of headroom.
I would keep that one, if it works well for you. Check here for many others:
Headphone Systems - diyAudio
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- Damping factor, could someone refresh my mind?