Tim
Provide some driver specs, such as: Fs, Vas, Qts, Qe, Qm, RMS, Xmax,
etc.
The Fs/ Qe quotient will provide the EBP (efficiency bandwith product).
Values of 50 or less suggest better performance in a sealed box. 50
-90 could go either way, and 90 or greater might work better in a
ported cabinet.
How much bass extention are you looking for? <40 Hz, <30 Hz, <20
Hz ? The Fs, Vas and Vb (net enclosure volume) are major determinants
of how low it will or can go, for a given Vb.
If you decide to go with a (well constructed) sealed 12 cu/ft box
(sufficient stuffing), you will obtain some serious bass extention. No
enclosure engineering required, unless you want it. If the EBP points,
more than less, to a sealed alignment, your driver will blow you away in
a 12 cu/ft box.
If, however, you want big bass from a smaller box, of a higher
alignment, THAN the numbers will have to be crunched, the laws of
physics red lined, and the test equipment brought into play.
Norman Bates has already addressed the issue of summing the stereo
outputs of the Adcom to mono. If your amp doesn't have a built in
bridging circuit, you could consider a passive sub X/over (80 Hz) that
will sum the channels. Most passive subs use these types of X/overs.
BTW, I'm a big fan of plate amps. They bring together every function
required, inside a neat and tidy package, to make for the ideal
subwoofer experience. They have an adjustible active X/over, built in.
Dude, a plate amp (for the sub) is the way to go, hands down. Use the
Adcom for the mains.
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