Axiom Home Page Forums General Discussion Technical Questions Understanding how a sub works

You'll have more luck calling them, I suspect.

They have techs at the 800 that answer the phones until 11pm EST.

I wouldn't count on it, they do monitor the boards and occasionally post but they have the support line for issues. Posting in the forums is more for community support and thread hijacks.

Geoff,

If you want to be sure whether it is related to position, I'd recommend you get an SPL meter and run some sound signal sweeps. It could be that your listening position sits in a null for bass response. One good way to figure this out once you have an SPL meter is to use the free Room Equalization Wizard software (a google search will turn up a tutorial on the Home Theater Shack forums). It takes a bit of work to become familiar with it, but once you understand it, it is an incredibly valuable (and free!) tool.

This will show you if you're getting subpar bass response across the frequency range, or if you're experiencing nulls in common frequencies that may give make the bass less than you want it to be. In my room when I first set up the EP600, I was really disappointed, but after reading recommendations here, I ran the REW software and found that I had an enormous dip in volume at 60hz, which is where the bass was supposed to be for a lot of the music I listen to. (you can see a lot of these response curves if you go to the link in my signature) I repositioned the sub and also ended up using an equalizer to counteract my room's bass-numbing effects and now couldn't be happier. Your mileage may vary, but for me, it turned out to be a lot about position and room dynamics.

It's unquestionably more work to run through this experimentation, but it is a semi-definitive way to determine whether the problem is positional or just a matter of insufficient bass for your room.

Jason

I've been following the thread on you EP350 and you have been receiving solid advice. Positioning of your subwoofer is of importance and I would suggest that you pull away the tables from in front of the subwoofer. Since it is firing towards the mains set the phase to 180 to work in sympathy with your mains. If left at 0 you are actually cancelling bass.

As suggested, tweak down the volume on the subwoofer amplifier and add gain via the HT receivers menu system which will activate the sub at lower volumes. I would also recommend that you do utilize a SPL meter and set your system manually trying to achieve a blending of output throughout the speaker system.

After setting the crossover in the receiver bypass the crossover on the subwoofer.