703 4" vs 2" and room tuning, was Soundstage

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703 4" vs 2" and room tuning, was Soundstage

Postby archive » Sun Apr 11, 2004 3:49 am

From: Mark Plancke <soundtch@x??x.xxxx
Date: Mon Nov 1, 1999 5:39 pm
Subject: 703 4" vs 2" and room tuning, was Soundstage

At 10:08 AM 11/1/99 -0700, you wrote:
>From: Dan Nelson <dprimary@e...>
>For a soundstage 2" would work since you don't have much bass in the room
>you just want keep it from sounding like a cave on the video. if the
>soundstage has concrete wall 4" may be required . 2" 703 does very well
>down to about 250 hz and remember drywall absorbs low frequencies. For
>your room if you have some bass problems you may need 4"
>Have your calculated the rt 60 of your room?

Ah, okay. I haven't calculated the RT60 yet, but I'd be willing to bet
it's around 1.5-2.0secs. The room actually sounds pretty good the way
it sits, but I have some problems below 400Hz from the sounds of
things that I've recorded so far, I think it's mostly centered around
the 250hz region. I'll have to calculate the modes and do some
measurements to figure it out acurately.

The construction is as follows:

8" concrete block wall (it's a basement)

2x4 walls butted up against the concrete,
insulated, 5/8" drywall.

A second set of 2x4 walls offset 1"
from the other wall, insulated, double
layer of 5/8" drywall.

Floor conrete w/ 1/2" plywood & hardwood
oak flooring. I will be using area rugs to offset
the "live factor" of the hardwood, but it sure sounds
nice and *looks* killer!

Ceiling: Heavy insulated w/ 2 layers 5/8" drywall
hung from R/C.

Overall sound, pretty live. I want to keep the RT60
to around 1 sec. I'm doing mostly rock and pop
recordings, live drums and guitars all in the same
room. I have one iso booth (still in construction)
that I'm going to use for vocals/acoustic gtr along
with the louder instruments when required.

Mark Plancke

Windsor, Ontario Canada
Posts: 4697
Joined: Sun Mar 21, 2004 6:26 am

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