Axiom Home Page Forums General Discussion Stereo Stereo amp recommendation?

Let us know what he says.

Just got the reply from Erik at SVS:


"Hey Ben;

You can use the 80hz highpass crossover on either the low or high level inputs/outputs. You can connect the sub in between the source and the receiver or between the receiver and the speakers. The only difference between the hookup methods is that the highpass filter on the low level inputs is 12db/octave while on the high level inputs it is 6db/octave.

Erik K"



I'll try the low level at 12dB/octave first, I think this is a little too steep, M22ti doesn't has much bass to begin with, anything below 60hz is weak so 6dB/octave should roll over easier and more natural sounding. I'll have to play around with different connection when I get the Sub tonight.

Ben, note that on receivers with bass management a 12dB/octave highpass is standard(24 dB/octave lowpass). It's likely that the line level connection would give slightly better results.

This afternoon the UPS guy was having a hard time getting the SVS box out of his truck, his face turned red and looked like he was about to faint when he'd finally carried it up the 8' stair to my door, my first guess...either this guy was a wimp, or this gigantic box weight a ton!! Heh, it was pretty heavy, shipping weight is 87 lbs but not as bad as I'd imagined. I brought it down to the basement and carefully inspect the box, didn't find any sign of it being dropped, so I'd unpacked everything, man this sub is extremely well contruct and seems like it can withstand some serious nuclear blast. This bad boy doesn't has the classy look of the Rocket UFW-10, but it's more like a good ol' muscle car packed with raw power under the hood.

I quickly dismissed the puny user manual and hooked up the cables and popped in a Dave Matthews Band CD, firing up the SVS solidified the muscle car image it has, it's getting late and I only had it set at 9 o'clock, that's plenty loud for now, had a chance to play the Darla taps scene and it shook the entire basement, everything on the wall was rattling and my daughter's pictures almost fell off, I'd jumped up quickly and turned down the volume!! If you'd asked me how does it sound so far, I'd say..."KICKS AZZ!!"
For now I run the Receiver's Sub preout directly to the SVS's low level input, and run the M22ti full range, everything sounds great so far but I will have to try the 80hz highpass some other time, I'm going to enjoy a couple more music cd with this new beast now. :-)

Congrats on the SVS!

I've got a PB1 (PB12) and M22s and keep them crossed over at 80Hz for music and movies. The only time I really notice a difference between running them full or crossed over is if I turn the sub off. Try it both ways and see what you like best.

So far the SVS PB1(PB12) matches extremely well with the M22ti, I still haven't got a chance to let the PB1 stretch its legs, some serious cranking will be done tomorrow after my wife and daughter went out. I'll have to calibrate it and map the in room FR as well, hopefully my neighbor wouldn't complaint much ;-)

I don't like the 80hz highpass on the SVS, the M22ti didn't sound quite right with the filter engaged, and they lost a couple dB. Plus the Sub is much easier to localized and pin-point even being crossed at 60hz to 70hz.

I'm going to leave the M22ti running in full range, in my room they have useable bass all the way down to 50hz and start rolling off at 45hz, then sharply decline at 40hz. they are able to draw most bass toward them, the sub virtually disappeared in my room even being crossed at 80hz, though I much prefer 70hz.