"John Atkinson" wrote in message
ps.com...
Arny Krueger wrote:
"John Atkinson" wrote
in message
ups.com
Arny Krueger wrote:
"MvonB" wrote in message
http://www.eminent-tech.com/RWbrochure.htm
Note that true subwoofer fanciers like Nousaine rate
woofers in terms of output on the order of 120 dB @ 10
Hz.
The Eminent can do that easily. See, for example,
http://blog.stereophile.com/cedia2006/091906soundfield/
and
http://blog.stereophile.com/cedia2006/091606thigpen/
In the first photo, the subwoofer is outputting 8Hz at
115dB spl in the room next door.
Trivial observation: 115 120.
Correct, but that was the level in the other room, according to a
spectrum analyzer. I also witnessed a IHz tone at the same level,
but I found it compeletly inaudible. Bandwidth extended up to
25-30Hz, so this is a a true_sub_woofer.
Second observation, delivering 115 dB to a hotel room doesn't
take as much effort as delivering 120 dB to a good-sized
listening room.
True, but the room the Eminent subwoofer was operating into
was neither small nor a hotel bedroom. It was ameeting room
measuring around 15' x 25', if I remember correctly.
Third observation, distortion is only speced at a relatively
weak 90 dB SPL.
I couldn't hear any harmonics along with the 8Hz tone,
though there may have been some masking from the
noise of the furnishings/walls/ceiling rattling :-)
Harmonics visible on the spectrum analyzer were in the
few per cent.
And remember, this is with _one_ drive-unit and 30W
of amplification. No reason (other than financial) to
use multiple units.
What did you think of this subwoofer when you heard
it, Mr. Krueger?
He was preoccupied with chromosomes and missed it but I'm sure he'll ask
Nousaine how it sounded so he can convey his opinion of it to the rest of
us.
Cheers,
Margaret