Axiom Home Page Forums General Discussion Advice from Axiom Owners Crossover on the EP subs.

I was just reading Alan's article regarding sub setup, in the new monthly newsletter. Below is a section from that article. Has anyone experimented with this type of crossover setting? As most of you know, we normally encourage people to leave the sub on bypass mode and let the receiver manage the LFE. I plan to try this tonight when I get home.

"On the rear panel of the subwoofer, set the volume control to the mid-point or a bit less, and turn the subwoofer’s own crossover control to Bypass (if it has a bypass setting) or to its maximum rotation. Note: If a user wants to experiment and set the subwoofer's crossover at the same frequency as the receiver's crossover, better integration of the subwoofer may be achieved. Experiments at Axiom have shown that with the EP400/500/600 subs, it's advantageous to do so because of the brick-wall algorithms in the DSP circuits."

I breezed thru the newsletter and missed that part.. thx for calling my attention to it Randy! I'm gonna give that a try.

Exerimenting now with Diana Krall Live in Paris and the song "Deed I Do". The upright bass is killer, hmmm, is it better, not sure yet.

I'll give it a shot. Ever since I redid the living room and moved my system to the opposite wall, I've noticed the bass isn't as seamless as it used to be. I just wish I knew what the un-modifiable crossover on my needs-to-be-replaced Onkyo TX-DS575 is....

Im looking forward to both your thoughts, if it seems to sound better I may have to try it also.

Okay Randy, I got home and hadn't read the newsletter, but after seeing this I immediately fired up The Planets and listened for about a half hour, both from my normal seat and right at the EP500, switching between 60,80,100Hz and bypass. Since you also have the Mehta Planets, you might check the passage beginning about 4:19 into Mars and a minute or so forward. This seems to reduce the upper bass fullness a bit, but I don't view that as an improvement, since it isn't bloated or otherwise unsatisfactory on bypass.

Curious what Alan's "brickwall" reference meant in more detail. The receiver that I use with the M22/EP500 setup has the usual 24dB/octave rolloff on the sub, which is generally suggested for getting good blending around the crossover.

too late to really test it tonight. I did set the crossover to 80Hz, though. If it sounds wrong, I'll raise it a bit. My receiver's xover may be as high as 100Hz. Who knows.

John, I will try the planets tomorrow night. It is to late tonight as the kids are in bed. I also wish Alan would expand on his article.

My reciever conforms to the standard 24dB/octave rolloff, unless you let it do the THX setup (all xover 80Hz) in which case it employs a less steep 12dB/octave rolloff. This may be similar in other receivers that do THX processing. I really don't have any opinion if this is better or not.

I have several views on this topic having tried out many crossover configurations and looked at their impact on FR and artifacts near the crossover point on the EP subs but before posting my thoughts I would like more information as well.