John Halliburton wrote on Tue, 29 December 2009 14:22 |
Milt Hathaway wrote on Tue, 29 December 2009 10:57 |
If you are primarily reproducing sine waves, they are great. However, due to the mass of the motor/belt mechanism, their impulse response was really lousy.
They might be really cool with an upgrade to real drivers, though.
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Milt,
After running QA TEF sweeps on a few hundred Servodrive subwoofer products, I am afraid I have to disagree on the impulse response statement. They are quite good at it actually, and Tom also did plenty of head to head comparisons in the shop at the time with other competing products.
They still produce some of the best percussion instrument reproduction in the frequency range I've ever heard-and I still have my pair of Contrabass subs as reference.
I do agree however, that refitting the Basstech 7 cabinets for sale in Dallas with "proper" drivers is definitely a workable project.
Best regards,
John
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Back in the day (late 80's) I got the same comments about my SDL5's. People didn't like them because they were "slow", "sluggish", and so forth.
And I would agree-as compared to my 2x15" scoops, 2x18" ported cabinets.
It took me a little bit to zero in on why. It was the time delay inside the cabinet. Nowadays pretty common knowlege-but things were "different" back then.
I got an audio logic delay unit for the mains. Noisy-bad HF-not much resolution (5ms intervals), there was not much else (that I could afford) available at the time. The internal delay was around 11ms (I think) so I used 10ms as the delay. Oh how times have changed
It did the job and the sound was much tighter and "faster".
Once again-it was not the cabinet (tool) but how it was used that made the difference.
But I still tore them up ALL the time. I probably spent 3 times teh cost of the cabinets in repairs trying to keep them running.
It was a rare show (OK maybe 25%) that they would make it to the end of the show without damage.
But then Tom changed the design and the parts were made to spec and the problems I had pretty much went away. Oh how I wish I had the BT7's instead.
Oh well. Days gone past.