Mark Knecht wrote: >On Fri, 15 Oct 2004 17:11:50 +0100, anahata <anahata@xxxxxxxxxxxxxx> wrote: > > >>On Fri, Oct 15, 2004 at 08:19:36AM -0700, Erik Steffl wrote: >> >> >> >>> sony STR-SE581 >>> voltage 150mV >>> impedance 10kOhms >>> >>> the creative.com knowledge base search revealed: >>> Line In Full Scale Input 2.0 Vrms >>> Line In Impedance 10k ohms >>> >>> what is Vrms? I guess it has something to do with voltage... should >>>2.0 Vrms play nicely with 150mV? >>> >>> > > > rms is a way to mesure AC voltage, In case of a sine, 2Vmrs corresponds with a sine of 2*sqrt(2) V of amplitude. take a look at http://www.doctronics.co.uk/rms.htm (it's always good to learn new things :) >Basically that a 2V sine wave on the input of the Sound Blaster would >give you full volume. > >On the other hand, if the Sony only puts out 150mV at full volume then >you are not driving the SB very hard. > >Couple this with a 10K output impeadance and a 10K input impedance and >your 150mV is cut in half to 75mV into a 2V input. That's pretty low >in my mind... > > > > >
