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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Look at the fs/QT ratio posted by Paul Joppa on March 9, 2015 at 12:18:45:
Thanks. Fs is also slightly high, so I tried more breaking in, with positive results initially.-new 12" which had about 20 hours of mild break in
-an older 15" which has a couple of years of gentle play (living room use in a system with 6*15" PA drivers)After heavy LF noise (more excursion than I'd previously driven them to) for a few hours, both drivers changed. The 12" was still off spec, but the gap closed slightly: Qts 0.52 --> 0.50 when 0.4 is specified. The Fs shifted by a sliver, about half a Hz.
The 15" response curve changed - it gained a couple of dB in the low mids (>100Hz). I didn't expect that. I obviously need to beat my drivers harder.
Will give a more extensive test / listen tonight (the break in is ongoing).
With the 12" driver, I can drop the Qts about 10% by applying an additional woofer's magnet (back to back orientation), so that's something else to experiment with.
I have plenty of drivers to repeat this with, so next time I'll be a bit more rigorous about setup and recording the changes.
EDIT: looks like all the benefit was in the first hour(s). Another ~20 hours of heavy LF seem to have made no further difference. Worth doing, but not as beneficial as I hoped.
Edits: 03/11/15
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- RE: Look at the fs/QT ratio - hollowboy 15:40:00 03/10/15 (0)
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