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Join Date: Oct 2003
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i haven't read the entire thread, but it appears that there is some debate around alpha niner's suggestion of a pro amp and external eq vs. a plate amp for a sealed ixl application.
most plate amps have a built in 2nd order high pass filter around 20hz, so don't expect much of anything below around 20hz.
without eq, that further means that the ixl 4 cubic foot sealed sub is going to be 12db or so down at 20hz as compared with the 80hz point, so now most of the 20-30hz region will be missing too.
a plate amp with 6db "boost" around 20-25hz will help and that can also be done with a plate amp with a parametric eq, but even that may not be sufficient for a flat response.
to the extent that folks who build sealed subs are often looking for 20hz or lower performance, alpha niner's suggestion is almost certaintly the way to go.
"How does the Dayton 1000watt plate amp perform compared to a Behringer EP-1500? Does the Behringer put out more power?"
the biggest drawback in my estimation is the non-defeatable high pass filter in the plate amps, see above.