Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: Footers & nodes

Posted by Duster (M) on June 19, 2014 at 12:05:12

In Reply to: RE: Footers & nodes posted by hawkmoon on June 17, 2014 at 16:56:51:

Images: Carbon fiber composite discs (30mm W x 10mm H), Herbie's Audio Lab Thin grungebuster Dots, Herbie's Audio Lab Big Fat Dots (dBNeutralizer pads).

I happen to use a somewhat similar DIY amplifier stand configuration positioned directly on the floor, that I use for a stereo power amplifier, that feeds a pair of passive subwoofers with an outboard active crossover unit. However, the configuration of the amplifier stand features two kinds of wooden boards, each of a different thickness, and different footers than yours are implemented to support and decouple the stacked boards, and with different cones than yours for the component that is positioned on top of them:

The bottom board is 2-1/4 inch thick Maple, coupled to the floor with a tripod set of carpet-piercing brass tiptoes. The top board is 1-3/4 inch thick Lyptus (hybrid eucalyptus) placed on top of the Maple board, decoupled by a set of four Herbie's Audio Lab Big Fat Dots (dBNeutralizer pads). The power amplifier is supported by a tripod set of Black Diamond Racing Pyramid Cones MK4 positioned point-side-up, with a Herbie's Audio Lab "Thin" Fat Dot (1-5/16" W x 1/8" H dBNeutralizer pad) adhered to the base of the cone for use as a decoupling interface with the surface of the platform.

Here's a configuration that I think may improve performance vs. your current configuration:

1. Place a Herbie's Audio Lab Thin grungebuster Dot (the Thin grungebuster Dot, not the regular grungebuster Dot), black color, with adhesive backing at the base of each brass cone (the opposite end of the point) to help the cones work more efficiently and mitigate microphonics. Measure the flat surface area of the brass cone base. See link:

http://herbiesaudiolab.net/gb.htm

2. Instead of placing the point of the cone directly on top of the Maple platform, use a set of carbon fiber composite coupling discs (30mm W x 10mm H), with a 1-1/8 inch diameter Herbie's Audio Lab Thin grungebuster Dot (the Thin grungebuster Dot, not the regular grungebuster Dot), black color, with adhesive backing on the base of each coupling disc to help the cones work more efficiently while dissipating vibration/mitigate microphonics. See links:

http://www.ebay.com/itm/3pcs-30mm-Carbon-Fiber-Spike-Isolator-/181439345497

http://herbiesaudiolab.net/gb.htm

3. Instead of Isoblocks, use a set of four Herbie's Audio Lab Big Fat Dots (dBNeutralizer pads) to decouple and efficiently block sound pressure waves from entering the system via the floor, as well as decouple and provide a low-compliance vibration blocking interface between the two boards. See link:

http://herbiesaudiolab.net/spkrfeet.htm

YMMV, so you might at first consider trying a complete configuration for just one platform system, then if you like what you hear, you can order more for the other platforms.

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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