Is there anywhere in the universe, an 8 ohm, 90dB,
coated paper cone, 8" or 10" driver with rubber surround that will reach 50 cycles in a closed box? I'm looking for one that will reproduce classical music with as much realism as possible. Help!
Thanks for the replies, but there seems to be no driver with the specs desired. The 205 has an F3 of 73Hz, not 50Hz. I've looked most everywhere that I can and there seems to be nothing available. Tks anyway!
The JBL LE10A is about 4db down @ 50Hz in a 2cu.ft. closed box. The sensitivity is about 90db/Wm. You can usually find them on eBay for around $120/pr. They have paper cones but they do come with foam surrounds. I run 2 per side and have been keeping an eye open for where I can get rubber surrounds for them. I haven't had any luck yet. The soft butyl rubber should lower the fs (and therefore the f3), but I don't know by how much.
Roddyama and DrewP,
Tks for the help. I'm getting closer! At least there are some near hits now. I wonder why some OEM doesn't see the hole in available drivers worldwide for this product? Anyway, good listening!
My guess is that you can get more bass from the same box size with a vented box, so that's what most drivers are designed for. Also paper cones are considered very 'old tech', so you can't appeal to the technically ignorant with advertising that shouts <i>kevlar</i> or <i>carbon fibre</i>. For DR speakers, plain paper cones and sealed boxes usually sound the best ime.
Gets to 50Hz in an enclosure of 40litres or more. Efficiency is 88.6dB for 2.83V.
The question of what Q you are aiming at is almost more important than the cutoff frequency. If you can live with Q less than 0.7 and use the bass lift of your room to counterbalance bass droop, then a whole raft of drivers that are normally used for ported alignments comes into play.
Thanks, Richard, and others, for your input. I'm shooting between .5 and .7 for the box load. So far, of the speakers mentioned, none have the sensitivity required, and most also do not have rubber surrounds. I think i'm gonna settle on a Vifa Pl26
-09-08. It's got everything but the sensitivity, and as you mention, room gain may give me the extra dB or two that I'm looking for. Anyway, if nothing turns up in the next few days, I'm moving on and hoping the driver integrates with the others already boxed and waiting. Thanks again for the input. I'm using a four way series design (the first three are in a separate box sitting on top of the box waiting for the other driver I've been looking for. I'm using a Morel MDT30, crossed at 2700Hz to a Seas CB17RCY/P, which in turn, strangely enough, is crossed to an Audax HM210GO at 270Hz. The combination sounds better than I'd anticipated, and I have to say that I haven't heard anything sound as good (without deep base, of course) in most of the audition rooms I've been in recently. Hopefully, the additional driver will give me the extra slam needed to register the realism in Welli's Victory as well as other works. Anyway, best of luck to you guys.