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Eminence LAB 15 15" Pro Audio Subwoofer Speaker
Has anybody a plan to bild a small cube box for eminence lab 15 pro subwoofer?
The Lab15 is better suited for a horn loaded alignment and a vented box will not be super small if you want super bass with this speaker, figure a 2-2.5ft^3 box with a 3diax6" port will make ~30Hz. The Lab12 will go lower (25Hz) in a bit bigger box (3.5ft^3 with a 3diax7.5" port) A very small sealed box with better bass (~20Hz!) is possible with a Linkwitz transform preamp, check Elliott Sounds page for the circuit. If you don't want to equalize before the sub amp you can use a small box with some passive radiators and computer modeling (see Imcamod81 - 31785 comment on the Lab12 with a 1.67ft^3 box with two passive radiators tuned with Jeff Bagby's woofer program) to get ~30Hz in a smaller box. Note both speakers can and will tear a weak box to shreds especially if sealed, use 1-1.5" material with mucho bracing!
Date published: 2013-08-07
Being that this is rated @ 6ohms, what impedance should the power amp driving it be?
Depends on the enclosure.Model in WinISD or HornResp and check out the resulting electrical impedance. Take care not to fall below the amplifier's minimum resistive load rating (which is usually either 4 or 2 ohms per channel).It is worth noting that, loaded in a large horn like the BFM Tuba 60, you'll end up with an impedance around 8, rather than 6 ohms.
Date published: 2013-06-17