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RE: Beautiful system you have...

Posted by hottattoo (A) on October 9, 2019 at 09:16:27

In Reply to: Beautiful system you have... posted by Mats Gunnars on October 9, 2019 at 06:17:14:

Hi, Mats

Unfortunately I am better at building things then using computers. I went to Dr.Bruce Edgars home several years ago to ask his advice on the midbass horn design I had in mind. In about 2 minutes with pencil and paper he went through some horn formulas and said "57hz". He drew up some rough measurements, and off I went. Dr. Bruce is one amazing, intelligent person. The midbass horn mouth is 32"wide ( so it could fit through the door ) 44"tall and 45" deep. There are 2 Altec 515b's with 10.25" square throats. The throats have a slight taper to avoid any parallel sides. There is also a 16" long wedge between the 2 throats. This horn ( in my room ) measures down to 57hz. flat and then drops like a rock, then crossed over at 450 hz. on top. I used 2 drivers per horn to make sure I had at least 106 db efficiency so I did not have to pad down ( total waste of power IMHO ) the field coil drivers.The room was gutted by me and built for audio. Because I live on the service road of the BQE it is noisy so... Between the studs was painted with 3 coats of auto soundproofing, loaded vinyl was put over that. I then used 4"shredded cotton insulation between the studs (16" on center in NYC). Next, I put strips of loaded vinyl on the face of all the studs and screwed down 3/4" plywood all around the room. The front of the house was given 3 layers of sheetrock with green glue between each layer. The other walls and ceiling got 2 layers of sheetrock with green glue in between. This house was built in 1899 and uses full dimension wood ( 2" x 4" studs is the actual size ). All the floor boards were screwed down uxing 2 1/2" screws, then 3/4" plywood was glued and screwed down on top of that. The 3/4" brizilian cherry finished floor was put down with soundproofing glue made by Sika and carefully tacked down. As you can see, considerable effort was put into this 16' x 22+' x 10' high room. The end result was well woth it.

This system sounds live, clear, clean, great imaging, has effortless power which very few prople have experienced outside of a live music event. I have gone to almost all the audio shows in the U.S. since 2000 and have not heard anyting I would trade my speakers for. Sorry for the long post but I feel an explanation was necessary. Nedless to say, my search for the "perfect" speaker is over.

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.

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