correction ... i own the Typhoon range more information is available on
-

http://www.pymblehifi.com.au/Whatmough%20Subwoofers.htm


max graff wrote:
Guys,

I am not sure if Whatmough sub's are available in UK.

I strongly suggest having a look at them. Its not the patriotic Aussie
in me blantantly favoring it, but they are really good. I have used
their entire range of speakers for almost 6 years now. Here is the
configuration for the Tornado range I own -

Configuration 1x300mm (12") cellulose fibre cone with a very long throw
suspension. This driver has a rubber surround and high temperature
voice coil.
Enclosure 25mm thick cabinet walls, fully braced bass enclosure with
bass reflex loading.
Amplifier 240 Watts continuous power output. Line and speaker level
outputs and inputs. Auto on/off switch. Thermal output protection.
Continuously variable gain (volume) control.
Electronic low-pass crossover from 40 to 160Hz.
Bass Extension 22Hz -3dB, usable bass to well below 20Hz
Average levels of 50 Watts.
Dimensions 500H x 470W x 570D mm.
Weight 30kg
Finish Bubinga real wood veneer

More information on their entire range is available on -

http://whatmough-whise.com/subwoofers.htm

I had the pleasure to meet up with the chief designer of the Impulse
range and understand the philosophy behind the design. Bloody awesome.
Cheers

Max

Keith G wrote:
"Serge Auckland" wrote in message
...
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.



This is interesting. This very thread has prompted me to set the 'sub ball'
rolling (finally) and I've scrounged a sub to play with for a few days:

http://www.apah69.dsl.pipex.com/show/subbie2.JPG

http://www.apah69.dsl.pipex.com/show/subbie3.JPG


...with a view to building one (or one like it) and am considering these
atm:

http://www.bkelec.com/HiFi/Sub_Woofers.htm

http://www.iplacoustics.co.uk/SW5%20...0subwoofer.htm


..unless anyone knows better?

But my point is that there is no way of locating the single sub by ear in my
small room and, as the sub in the photos (BK Electronics) has a *variable*
phase adjustment between 0 and 180 deg, is there not a danger of phase
cancellation with two subs, given that they seem to need a lot of adjustment
and faffing with to suit the various different types of music....??

IOW, is a pair of subs a possible complication that might be best *not*
bothered with....??