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Subwoofer damping

I didn't no whether to post this in the speaker or tech forum, but I'll ask my query.

I have a very large subwoofer which has 2 16 inch drivers. I fired this baby up today after having it in storage for many years. I played a reference recording of Frederick Fennell's Pomp & Pipes. Well I set the crossover pots at 10:00, 6 being the lowest and 5 highest. Everthing was ok till there was some low and I mean low frequency with plenty of dynamics. I could hear the drivers make a girgle sound that came out the 4 vents in the cabinet.

I can't recall if I've heard this before and I'm thinking that I need to add additional damping material. Doe's anybody supply speaker wool anymore? I can't imagine overdriving this thing....I think my house would collapse...so adding more material seems might help. Any speaker tech's with answers would be appreciated.

Roger
wavetrader

Showing 1 response by speedbump

speedbump
2 posts
 
Wavetrader, I was thinking of "Skanning", which I believe was a fore-runner of Scan-Speak (which I'm not sure was in existence back then). Does that name ring a bell?

If so, those are probably fairly high Qts woofers (like some of the older Dynaudio drivers), and the large aperiodic box size makes more sense.

Shadorne, back in the early 90's when those drivers were made nothing even remotely approaching the TC Sounds woofer was in production, and probably not even on the drawing board. In those days, 10 mm linear peak-to-peak was considered high excursion.

Duke
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