On 3 Feb 2012, at 00:35, cunobeli...@mac.com wrote: > > On 2 Feb 2012, at 23:48, pski wrote: > >> >> TiredLegs;688202 Wrote: >>> Also, the fact that your speakers are specified to 40 Hz does not mean >>> that they have zero output below that frequency, it just means that the >>> output below that frequency is reduced below whatever threshold they use >>> in their spec. (The response falloff isn't necessarily a cliff.) >> >> +1 >> >> As well, the sound at the "bottom" is important. Does the speaker "drop >> off like a rock" or "make a graceful exit" rather than burp and fart? >> There's a little subjective issue here. >> >> Where the speakers sit in the room and whether the amp has enough are >> the questions. Expected volume is the other variable. > > My LS3/5As specified a frequency response down to about 70Hz, +/-3db (I think > - long time since I've looked at the spec). They measured as having a > diminishing but still very significant output down to 45-50Hz or so, when it > tailed rapidly off. > > My sub was set to start rolling off at 40Hz (I now find, checking the > settings) and did so at a rate of 12db per octave up to 240Hz, 24db per > octave above that. The result was a pretty flat response up to 300Hz when the > test signals I was using gave out. But that's using only an SPL, and as has > been pointed out, the presence of loud distortions around the measured > frequency, especially low down, make that only a very rough guide. Still a > useful start for tweaking though.
That should have been "the combined result was a pretty flat response" etc etc. _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
