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In Reply to: Ideal Parameters for OB Woofer posted by Joseph Cohen on February 3, 2007 at 12:28:05:
as the ideal parameters go............its been my experience that what the driver sounds like and how it performs isnt really anything you will be able to derive from ts parameters.too many variables involved to discount any driver that is anywhere near the ballpark for the application.
for instance.........i just put a pair of 16ohm b&w 8"mid-bass drivers from the dm220 series on an ob and the sound is really really good with greater depth and presence than when the drivers were sealed in their box.
im sure many people would never have tried this because drivers designed for small sealed enclosures shouldnt be that good on ob but these sound really good.
i hate to say it but they seem to be putting out more bass than the pair of 15"drivers that are in the main speakers and those drivers are supposed to be great for ob.
come on over and hear what is going on. :)
i will shoot you an email for the address.
Follow Ups:
I need a pair. Damn cat destroyed them and I hate to toss the speakers. I think the ones from that speaker are the same.
both of them and the xovers if you like.i need to ship a bunch of stuff this week so shoot me an email with your address if you want them.
I'll pull mine out and take a look. I might only need one tweeter.But yes, if you have the same tweeter I could sure use it. I can't do asylum mail can you email me at Rbrunt(at)mercymiami(dot)org?
Here is a link to a pic of mine. Does your tweeter look the same?
http://www.bwspeakers.com/downloadFile/speakerModel/DONE_-product_info_DM330i.pdf
x
David,It would be nice to visit again, and, of course, I am very interested to hear your ob. I have heard from others as well that ts parameters do not necessarily tell you what is going on in this type of situation.
Interestingly, Dick Olsher says, "It seems to me that many listeners confuse bass weight with bass extension and opt for a subwoofer when bass weight is lacking. The problem typically lies in the upper bass, the octave from 120Hz to 240Hz where much of an orchestra's foundation and acoustic power resides. This is the octave that box woofers have a hard time coping with, basically managing to sound boxy through this range." I suspect that your 8" drivers are adding considerable weight. Have you measured their bottom end extension?
Many thanks,
real rta loaded on a laptop and hope to get some meaurements later this week after i build a real psu for the active xover.i go past the blackpoint exit a few times a week.
let me know when you want to get together either at my place (have to wait for family to be gone) or at your place.
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