Surely there are a couple of things at play here - the input impedance of the power amp and it's overall gain.
A 3V pp input would produce an 84V pp output at the speakers with a power amplifier with a fairly typical gain of +29dBs. But if the input impedance of the power amp is too low (or the output impedance of the source to high), then the source may not be able to properly drive it's 3V pp output to the power amp. Passive preamps are generally a bit of a compromise between input and output impedance - which is why they don't work in every situation - but the transporter/SB3 is not the same as a passive pre. It has an active, low impedance output stage. I usually feed my SB+ directly into a Power Amp with a gain of about +23dB and an input impedance of about 30K Ohms; and use the SB+ digital volume control - it works really well. -- Patrick Dixon www.at-tunes.co.uk ------------------------------------------------------------------------ Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=27158 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
