opaqueice;291976 Wrote: > I think Sean was probably referring to the "doesn't bode well" part of > your post when he said it was wrong. Read the second paragraph of the > wiki article you linked to. > Well I think NewBuyer had it right: you want maximum voltage across the target but I wanted to hear Sean's explanation.
> > Reconcile what? In both cases the source impedance is much lower than > the load's, as it should be. > TP (100 ohms) into Amp (10k ohms) vs Amp output (~4 ohms) into speakers (~4 ohms). In one case the impedance is not matched in the other it is. I assume this is because the speaker is a physical transducer and you'd need maximum power transfer but again I'd like to hear a designer's perspective. > > If in addition the input impedance isn't purely resistive and varies > with frequency (which is certainly the case for speakers), the effects > of the voltage divider will be frequency dependent and would seriously > distort the sound... unless the output impedance is much less than the > load resistance. Yes, this is a whole 'nother matter - LC effects. Not really wanting to get into that at this time for my purposes. Another thing I was curious about. I've heard that pre-amps are needed because often preamp DACs and volume controlled CD players, etc., don't have the output power suitable for a power amp input and that a preamp is needed. I want to use the TP as a pre-amp and avoid buying a separate pre-amp. That's why I'm asking these questions. Although it's good information I don't really want to hear "other's are doing it"... I like to know what the pros and cons are from a technical perspective. An MC402 by itself is pricey and if I've got to buy a pre-amp too then I've got to take that into account for my budget. regards, David -- wireless200 ------------------------------------------------------------------------ wireless200's Profile: http://forums.slimdevices.com/member.php?userid=11887 View this thread: http://forums.slimdevices.com/showthread.php?t=46347 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
