Please review the site Rules, Terms of Service, and Privacy Policy at your convenience. Rules, TOS, Privacy
Get familiar with the reaction system: Introducing the Reaction System

Aurum Cantus AST 30130 in test box - Acousta-stuf polyfill vs Mundorf Angel Hair

So I finally got around to building a small test box. Similar to what it would be in, if I ended up using it in my project. The AST series from Aurum Cantus are dipoles, so a box for me was necessary.

Frequency response in test box, roughly 2.5V/1meter, in-room, with a 450Hz 2nd order HPF.

Frequency Response with Parts Express Acousta-stuf polyfill. Was identical with Mundorf Angel Hair, for all practical purposes.

What I was interested in was if the box stuffing affected distortion performance. Here is what I found.

Felt pad in-place for one set of tests, then removed for the others.

20g Acousta-stuf vs 3.9g Mundorf Angel Hair. Angel hair looks like sticky icky itchy fiberglass. WRONG! It is the softest thing I've ever held, softer than a newborn baby! I just want to hold it up against my face, lol.

That bundle of Angel Hair was the same size as the Acoust-stuff, but it just keeps expanding and expanding to fill up all available space. I had to put it in the test box and seal it up because I thought it was going to engulf my whole room, lol.

Obviously not a huge difference, but I'll take it (and everything else) with Angel Hair!   Distortion seems a bit high compared to manufacturer specs, but this was with a class-D amp, where as previously  (prior to 8 months) I was using a class A/B amp that I undoubtedly need to return to using.


Sign In or Register to comment.