Axiom Home Page Forums General Discussion Technical Questions question for the pro's on M80's or M22's

I pretty much leave everything to small, with 80hz crossover for music and movies. For me, that is the best compromise. I don't want to change my receiver every time I change sources anyway.

Your mileage may vary.

Been a long time since I posted anything here, but I keep up with most of what is going on. Anyway, I have a couple questions about crossovers. I have the epic 60 500 system, and even though I have had it for a year I still find myself just begining to learn how things work. Right now I have a Yamaha 5960 reciever. I plan on upgrading to one of the new 1.3 onkyo recievers that I see are coming down the pipe because of the hdmi 1.3 connection and it being able to decode the lossless tracks. Anyway, back to my questions, With my setup now I cannot adjust the crossover for each speaker, but with the new reciever I will be able to do so. With these speakers what should I set the crossover for on each of them. Everything is set to small except the M60's. They are at the large setting.

JH, my suggestion is that even now the M60s should be set "small". Although they do a pretty good job in the lowest bass, your EP500 does even better there and should be given the responsibility, while relieving the M60s of some of the load(which should allow them to play a little cleaner on the higher frequencies). Even with the new Onkyo, which will have more flexible settings available, I'd still suggest setting everything small with an 80Hz crossover.

Alan's input is quite valuable in explaining the subtle point of slope in the low pass filter at the amp/receiver. If I understand correctly, when the cross over is set to 80Hz and the slope is 24dB/octave then the M80s will produce 40Hz but at a level that is 24dB less and 20Hz at a level that is 48dB less. Higher the listening level, the more prounced the work by M80 at this low frequency. If the slope is less steep (12dB/octave or 6dB/octave) or if the cross-over is set lower, bass duty for the M80 would be proportionally higher. This is the basis for setting physically large speakers like the M80 to "small" in order to unburden them of low frequency work at high listening levels. While there is no "brick-wall" on the receiver side regarding the low-pass cross-over, Alan's recent article on subwoofer calibration indicates that the cross-over point in DSP-driven EP subwoofers actually resemble a brick-wall (i.e, no slope). He recommends setting the cross-over at the EP subs to same cross-over as in the receiver. I think many of us would like some more explanation on this before cascading the cross-overs.
John

John,

I already started a thread on Alan's recent article in the newsletter.

Randy

http://www.axiomaudio.com/boards/showfla...;gonew=1#UNREAD