24 db/oct sub plate amp?

[Dave Jones]

What sources do you folks know for subwoofer plate amps that have a lowpass filter with 24dB per octave lowpass filters?

[Bill Fitzpatrick]

I typed:

plate amp 24db

into Google and got some results.

[leadbelly]

Have seen good things said about these:

http://www.creativesound.ca/products...ory=Amplifiers

[Dave Jones]

Originally posted by leadbelly
Have seen good things said about these:

http://www.creativesound.ca/products...ory=Amplifiers

At $349 for 200 watts, they certainly should be good!

PartsExpress has a couple of less expensive ones that have a 24db lowpass - 300-802 and 300-804. The 804 (200 watts @4 ohms) has "soft clipping;" The other, one (100 watts) does not.

[jackinnj]

here's one using an LM3875 as the amplifier (note -- I didn't draw in the 0.7uH inductor across the 10Ohm output resistor) -- the filter values are set for 400Hz -- each filter Q is 0.707 -- the first opamp is just a buffer, the second provides 50uS of compensation (which you can adjust) -- use Texas Instruments Filter Pro for the F3 point you need:

[mightyjimbo]

Rythmik Audio sells one. They have a web site. Ive seen other vendors sell thier products as well.