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echo: audio
to: GORDON GILBERT
from: JOHN ALLEN
date: 1996-07-06 08:26:00
subject: RE: SUBS AND AC-3

 >  >        I am evidently missing something big here and perhaps you can 
 >         AC-3 gives you a *lot* of flexibility when it comes to subs.  The 
 > ".1" sub channel is neither for the front channels or the rear channels.  
 > It's a separate "bass-only" channel.  However, the bass in the other 5 
 > channels is still easily directed to this same channel, if desired.  You 
 > can direct *all* bass (front, center, and rear channel bass, along with 
the 
 > ".1" bass) to one subwoofer.  Or you can direct only the rear channel bass 
 >         Basically the idea here is that your ears won't localize rear bass 
 > channels (or even stereo ones) below a certain frequency (usually 
 > considered 80Hz for normal program material) so then it becomes simply not
           When I experimented with the subs I built I crossed them over at 
40 and 50 Hz, and placed them in the only open area available, which happened 
to be immediately behind my main right speaker, which placed it almost in the 
kitchen. When walking to the kitchen I could hear the main speaker drop off 
and the sub continue, the farther into the kitchen I walked. Hmmmm. Just 
couldn't resist the urge and scared my wife half to death as she caught a 
glimpse of me moving the subwoofer into the middle for the kitchen floor with 
the cables trailing out behind. "IF YOU THINK YOUR PUTTING THAT IN THE MIDDLE 
OF THE KITCHEN, YOUR OUT OF YOUR MIND!!!!!". 
           I was really surprised to hear that probably 75% of the subs 
output still made it into the listening area AND you could not tell that the 
speaker was actually sitting in the adjoining room. Now there was a six foot 
open acrhway between them...but... a wall between the sub and the listening 
position. So all I was getting when seated was "reflected" sub bass. The next 
day one of the audio mags arrived and one of the articles mentioned something 
about nonlocalization and putting your sub in your kitchen and it wouldn't 
make any difference.
           I have never been one of the me too crowd. I have always tried to 
find my own way and make things a little interesting along the way. I have 
been listening to subs every weekend for the past three months and can 
honestly say that nothing I have heard so far measures up to the Defin Techs 
or the Velvodynes. They are both really excellent products!!! The circuitry 
in the Velvodyne is going to take a little more reading to fully understand. 
I am told that it is all actually quite simple and works wonderfully. But I 
just haven't taken the time to digest it yet. So for now it looks like one of 
the two will be resting in my livingroom in the next few months.
           I have also decided to sell my house and find something that 
offers a better listening area...as well as a couple other features both my 
wife and I are now wanting. But the listening area is the main mover. When we 
looked for a smaller house for retirement we were attracted to the small size 
and very open southwest floor plan. My speaker system and six grandkids all 
visiting at the same time have made us relize we had no earthly idea what the 
hell we were doing. Here, 99% of the homes DO NOT have basements. They are 
built on reinforced concrete slabs. So the size of your house is the size of 
your house. No where to hide stuff, have a workshop, build a den or playroom, 
etc. I really miss that. We have entertained the idea of moving from Arizona 
to a four season climate and different housing designs, but that is really 
uncertain. We will probably end up staying and getting something that offers 
the space we need to keep from going nuts. I would also like to find 
something with a little more room between houses. Here we are at about 25 
feet apart. I would like a lot more for audio reasons. 
           Oh, BTW, Sensible Sound reviewed the TFM-55 in the issue that 
arrived yesterday. It got all Aces! It listed the MSP @ $1,200. I wasn't 
aware 
that they had crept that far up. That puts them in the range of many others.
Cheers, John
--- AdeptXBBS v1.07f (Registered)
---------------
* Origin: Tempe, AZ USA (602)491-5285 (1:114/20)

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