pfarrell Wrote: > jonheal wrote: > > Actually, I think my system goes fairly low as it is. I haven't put > an > > SPL meter on it yet, but I think it's safe to say that it's no more > > than 3db down at 60Hz. Maybe 50Hz. (I'll find out for sure with a > meter > > before I proceed too much further.) > > (I'm looking for that extra octave with the sub.) > > An octave is only half the Hz. So if you go down to 60Hz, an extra > octave is only to 30Hz. But that would let you hear the low E > on a bass. > > IMHO, it is not a subwoofer if it makes any signal > above 50 hz. And I could agree with folks arguing that > sub woofers stop at 40hz. > > > I was under the impression that it was not acceptable to sum the > > channels with a Y-connector because you mess up the impedance. Is > this > > not true? > > It is correct, you do not want to use a Y to sum, It is fine > (usually) to use a Y to drive two outputs from one source. > To mix, you need an active component. > > The SPL meter will not tell you if the signal is correct. > Lots of systems "double" at low frequencies, and the SPL > will look right. Doubling is when the woofer can't reproduce > the fundamental, so it does the second harmonic instead. > > Any audiophile speaker should go into the 50s or even 40s > without doubling, even mini-monitors. A rolloff > of 3db/octave starting at 50 is fairly typical > unless you have big drivers, or lots of watts. > > -- > Pat > http://www.pfarrell.com/music/slimserver/slimsoftware.html Pat,
There is a free program at: http://www.marchandelec.com/fg.html ...that will generate a sine wave at any frequency between 1Hz and 20kHz. My assumption is that any doubling my main speakers do will be audible to me as I pass through various frequencies between, say 40Hz and 70Hz, and then I can try to take that into account in attempting to determine where my mains start to lose it. What do you think? The second harmonic is twice the frequency, yes? -- jonheal Jon Heal says: Have a nice day! http://www.theheals.org/ ------------------------------------------------------------------------ jonheal's Profile: http://forums.slimdevices.com/member.php?userid=2133 View this thread: http://forums.slimdevices.com/showthread.php?t=20907 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
