RE: If those were mine ...

Posted by drlowmu (M) on February 19, 2016 at 19:20:41

In Reply to: If those were mine ... posted by rickmcinnis@dogwoodfabrics.com on February 19, 2016 at 13:55:28:

You are correct, a full sand load behind the curved bass horn would do two to four things simultaneously :

(a) add mass, AND
(b) infinitely brace the too-thin curved surface.
(c) brace the too-thin side walls in their middle section
(d) It also is directly damping the woofer's mounting plate.

My goal was to leave the A7 825 box 100% stock, and be able to disassemble the mass loading at will and quickly.

It was FASCINATING to hear the differences between mass loading with 100 pounds, 150, 250 300 and ultimately about 440 pounds. I was listening " full range" on the 515Bs, with a VERY good SET amp of my own design ( two stage Type 45 direct coupled - ultra DYNAMIC ).

The determinations I made "full range" may not be valid or needed for operating the 515B as a simple two-way, up to 800 HZ only. But that is OK, at least I now very-well know the enclosure's limit when playing " full range ". It was awesome to experience all of this Rick.

Jeff Medwin

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Follow Ups Full Thread

Topic - Mass Loading ALTEC A7 VOTT 825 enclosures - drlowmu 10:17:57 02/18/16 (18)

RE: Mass Loading ALTEC A7 VOTT 825 enclosures - hifipaul 15:21:04 02/20/16 (1)

RE: Mass Loading ALTEC A7 VOTT 825 enclosures - drlowmu 09:09:14 02/24/16 (0)

i tried one better - merdy 14:06:42 02/20/16 (1)

....too Funny !..(nt) - drummerwill 18:18:19 02/20/16 (0)

If those were mine ... - rickmcinnis@dogwoodfabrics.com 13:55:28 02/19/16 (5)

RE: If those were mine ... - drlowmu 19:25:50 02/19/16 (2)

RE: If those were mine ... - rickmcinnis@dogwoodfabrics.com 08:00:12 02/20/16 (1)

RE: If those were mine ... - drlowmu 09:56:46 02/20/16 (0)

RE: If those were mine ... - drlowmu 02/19/1619:20:41 02/19/16 (1)

RE: If those were mine ... - Phil-G 20:00:01 02/20/16 (0)

Might work great 4 hard rock but what about metal? - Kloss 06:20:10 02/19/16 (4)

RE: Might work great 4 hard rock but what about metal? - drlowmu 10:03:10 02/19/16 (3)

RE: Might work great 4 hard rock but what about metal? - Kloss 10:34:38 02/19/16 (2)

RE: Might work great 4 hard rock but what about metal? - Don Reid 08:52:20 02/21/16 (1)

RE: Might work great 4 hard rock but what about metal? - Kloss 09:35:58 02/21/16 (0)

RE: Mass Loading ALTEC A7 VOTT 825 enclosures - Paul Joppa 18:34:43 02/18/16 (1)

RE: Mass Loading ALTEC A7 VOTT 825 enclosures - GM 13:33:34 02/19/16 (0)

RE: Mass Loading ALTEC A7 VOTT 825 enclosures - Rafaro 12:17:54 02/18/16 (0)

Follow Ups

RE: If those were mine ... - drlowmu 02/19/1619:20:41 02/19/16 (1)

RE: If those were mine ... - Phil-G 20:00:01 02/20/16 (0)

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