"bsguidry" wrote in message
om
After many helpful comments here and with further reading on Adire vs.
Dayton subwoofers, I'm now tending towards the Adire Tempest in a
vented enclosure using Adire's plans for the Adire Alignment. This
enclosure offers a good compromise for HT and music listening.
Luckily the enclosure plans are highly detailed, therefore I should be
able to create an optimal enclosure.

I found a subwoofer comparison chart on Adire's website that compared
the Shiva's SPL at 20hz (I think it was at 20hz) to other quality subs
including the Dayton Titanic and the NHT 1259. The Shiva outperformed
all of the subs on the chart which contradicts the results I obtained
using WinISD, however, I'm willing to accept the real world results as
more realistic than those plotted in theory.

I did the math and found that the difference you mention from
http://www.adireaudio.com/diy_audio/...dire/shiva.htm
is almost exactly projected by the difference in actual Xmax.

Now comes deciding on the amp. Unfortunately, the Tempest has two
8ohm voice coils. My Carver amp is not rated for 4 ohm bridged loads
and running it stereo into 8 ohms would reduce its overall power.

I was faced with a similar challenge when I was looking for power to drive
my ACI DV-12 with one of my modified Dyna ST-400s. I hooked one voice coil
to each side of the power amp and had plenty of bass.


I'm looking into the Rythmic 350 which on paper delivers fairly clean
and well-damped power up to about 370 watts rms. It also has a rumble
filter, frequency crossover settings, and damping settings.

I am unfamiliar with that amplifier and I can't find any online references
to is under the given name.

Were I buying a new subwoofer amp, I'd give serious consideration to the
Behringer EP2500 Power Amplifier

http://www.behringer.com/02_products...P2500&lang=eng