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RE: Has anyone else tried this experiment?

Hi Vinnie,

I admire your integrity in the test (not saying it's the be-all and end-all, but many audiophiles seem to pull out excuses when this happens rather than just reporting the result).

If you replace your resistors with something like a 33 ohm resistor to protect the power amps, you may find yourself hearing more of a difference, though. Because SET amps in particular tend to have rather high output impedance so their frequency response (and even output level) can be very much affected by the impedance of the speaker load which is usually not very flat. Putting an 8 ohm resistor across the speaker makes the impedance variation quite small, so would hide that particular effect. Of course if that did suddenly make the differences clearly detectable, it would be hard to argue that the SET was the better amp than the PP since it can be more messed up by speaker impedance curves.
_

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