Eeyore wrote:

Don Pearce wrote:

I would add that finding an ideal position for one sub is hard, and
right positions for two are near enough impossible. Provided there is
very little distortion and the crossover frequency is sensible, there
is no benefit to having a pair of subs - you can't locate the sound
anyway.

Oh yes you can !

That's just an old wives' tale.

Graham


I'm not so sure. I did some tests a couple of months ago after reading
that in the early days of stereo, Philips reckoned that anything below
200 Hz was non-directional, and consequently, a sub and two satellites
was perfectly acceptable for stereo. EMI insisted on two full-range
loudspeakers.

Using sine waves into left only, right only or equally into both, below
220 Hz it was increasingly difficult to decide which was playing, and
impossible below 150 Hz. That of course is in my room, and other rooms
may be different.

However, when using a single subwoofer located to the right of the
right-hand 'speaker and with a crossover of 70Hz, it was disturbing to
hear the extreme bass separate from the 'speakers, possibly as a result
of hearing harmonics from the sub. The disturbing effect went away when
the sub was positioned between the main 'speakers.

I currently use two subs to fill in the bottom half-octave below my main
'speakers, and I have them located as close as possible to the mains to
create effectively a pair of larger 'speakers. Works for me.

S.