- Nov 21, 2016
- Lincoln, NE, USA
My AV System
- Preamp, Processor or Receiver
- Onkyo TX-SR705 Receiver
- Main Amp
- Crown XLS 1502 DriveCore-2 (x2 as monoblock)
- Additional Amp
- Behringer A500 Reference Power Amplifier
- Front Speakers
- MartinLogan Electromotion ESL Electrostatic (x2)
- Center Channel Speaker
- Phantom Center
- Surround Speakers
- NSM Audio Model 5 2-Way (x2)
- JBL ES150P Powered Subwoofer (x2)
That has been my experience as well. LF response is barely affected.by the absorption.1 - Pretty tough for a four to six inch thick absorber against a wall to have much affect on bass below 200Hz though. Absorbers work best at quarter wavelength from the reflecting surface, so even at 200Hz that's 1.4ft.
Very cool. The dual-mono pink noise works well. Or a favorite track mixed to mono. Have not tried the phase reversal step.About toeing the fronts, the best and easiest way I discover is the following forom a member Linearphase:
3. Tweak the toe in and MLP to produce the best sound and most lifelike imaging. Keep things very symmetrical. if you have access to pink noise you can also play it over both speaker to confirm a good centered image. Then reverse the leads on ONE speaker. You should hear a "hole" between the speakers with the rest of the sound speed evenly out from there, ideally extending even bit outside the speakers. Tweak the toe in while at the listening position slightly. You should find one position were the noise sounds smooth AND the image just locks to a hole in the center. Don't forget to return the leads back to normal polarity when done here.
It is the second step that make a differnece (the whole in the center after reverse polarity of one speaker) which is more difficult to find but when you got it, the SS&I is better.
I need to do some playing with front wall diffusion. I have been so happy with absorption that it has become my go-to front wall treatment. I seems like diffusion would soften the imaging, but I sill need to try it and compare one of these days.I've had what I believe is good success starting out with the speaker placement recommendations by Cardas: http://www.cardas.com/room_setup_main.php
It was not until I tried those recommendations many years ago that I actually started enjoying listening to music. The closer I am to the speakers, the better it sounds to me... and the depth is beautiful.
Whether to treat the front wall with absorption or diffusion also depends on the speakers... as it is my understanding that planar speakers like MartinLogan should have the front wall diffused.
Sonnie, Sonnie, you have to BELIEVE in yourself! And your ears!Having said all that, now that I've read a good bit of Toole's book (and references to parts I have yet to read), I'm not sure what I am hearing is real or fake anymore... perhaps my mind has been playing a lot of tricks on me.
Maybe just a hair... LOL. That is my favorite kind of recording, the "created from nothing" (not the smashed dynamics). Wonderful possibilities for SS&I!Right, he rarely mentions dipoles other than to say YMMV with them. In particular I recently read a comment like that where he was discussing the listening tests from which the proverbial Harman Curves were derived. Of course those tests were done with conventional box speakers, and I might add, commercial studio recordings of pop music (i.e. no classical or jazz recorded in live settings). I mention the latter because it seems pointless to me to discuss imaging and soundstage for recordings made with a number of close mic'ed instruments in a studio (perhaps even on different days), such that there is no "there" there, and then "mastered" to the point that all hint of dynamics has been pounded flat. Did I just digress?