Newbie need WAF support

[Mr. Music]

Newbie need WAF support - 1. results

Hi all

I'm new to this forum but certainly not to tweeking with Hi-Fi equipment. I'm educated as electronic engineer and has taken all courses available in this field some 20 years ago. As I now have decided to improve my listening room for two channel listening only I would appreciate any help onwards.

My listening room is our living room having an L shaped form so here the problem begin as we have no easy formulas for calculating.

My listenig "cubicle" could be considered rectangular with the dimensions:

Front and real wall: 13,5 feet (4,5 meters)
Lenght: 18 feet (6 meters)
Height: 7,5 feet (2,5 meters)

Added to this is the L shape to the right with dimensions:

Lenght: 10, 5 feet (3,5 meters) same orientation as above.
Dept: 9 feet (3 meters)

Sound Level Meter and test CD is ordered at the time of writing.

I use Martin Logan Ascent i electrostatic laudspeakers and have a really precise point identification about 9 feet from the speakers placed 7,5 meters from each other. One goal will be to move the optimal listening point further back towards the back wall. If feasible about 10 feet from the front wall.

My initial thougt to obtain symmetry has been to add absorption on the 18 feet wall opposite to the L part of the room, i.e. make it absord sound energy as in this part of the room.

Does this make any sence and can it be done in reality?

Any help will be appreciated.

Edit 8. November 2004:

I have received the CARA ver. 2.1 Plus CD and installed the SW. I have downloaded the patches and other files from their homepage too.

It has been relatively easy to make the first models of the room, and the first simulations run should make my set-up wish feasible. I must however stress, I have used my knowledge and experience to add a ceiling absorbing field in front of the speakers. Further I have made absorbers on the first reflection point on the right wall. These two simple steps brought the reberation time well below the guidelines in nearly the total frequency spectrum.

Next I include a bass absorber with a center frequency around 160 - 200 Hz. This should in theory reduce the coloration of the sound substantially.

The laudspeaker models in CARA are limited , none exist for Martin Logan. I have just taken one from the standard library to represent a dipole speaker as an electrostat is.

One interesting result is, the simulation gives bad results if I apply just one corner bass absorber. This is due to the speakers dipole nature using the wall behind the speakers actively. Closed box designs normally try to avoid this.

I'm awaiting my test CD and Sound Level Meter next week. It will be interesting to see, if theres any correlation between the simulations and the measurements.

I have placed some 10" glassfiber isolation behind my listeling place and some polytherene heat insulation plates at strategic places. This indeed indicate the a relatyle high WAF index is feasible and the sound stage has been improved drastically allready.

Cheers

Richard

 

[sencoreskj]

placement and calibration

You might consider hiring a professional for set-up and calibration of your system and room. The average Home Acoustic Alliance certified professional will do wonders for around $250.00-$300.00.

It's worth every penny and the piece of mind is invaluable. You didn't build your own components-why try this step on your own when a pro can handle it for you?

Feel free to call for a referral if you are interested.

Steve

 

[Mr. Music]

You might consider hiring a professional for set-up and calibration of your system and room. The average Home Acoustic Alliance certified professional will do wonders for around $250.00-$300.00.

It's worth every penny and the piece of mind is invaluable. You didn't build your own components-why try this step on your own when a pro can handle it for you?

Feel free to call for a referral if you are interested.

Steve

Dear Steve

I'm a Dane so will it work??? I'm certainly interested

 

[jaxvon]

This has nothing to do with your issue, but Denmark is awesome! I spent some time there this summer in Rinkobing (I KNOW that isn't spelled right, but you get the point) and it was a blast. You should be able to find someone to help you install stuff, seeing how there's companies like Acoustic Reality and B&O over there.

 

[Mr. Music]

This has nothing to do with your issue, but Denmark is awesome! I spent some time there this summer in Rinkobing (I KNOW that isn't spelled right, but you get the point) and it was a blast. You should be able to find someone to help you install stuff, seeing how there's companies like Acoustic Reality and B&O over there.

Ringkøbing in the cold part of this summer 2004 must indeed have been awfull. Cold, blowing and probably raining cats & dogs too.

Denmark has a very high standard (excluding B&O in my opinion) with respect to Hi-Fi systems, but at the moment we have surprisingly little professional services on set-up for Home Theater and/or Stereo systems.

If such a company should appear "out of the blue" I might use it. Until then I use my education, experience, CARA+test CD and friends and relatives for optimising ...!