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

Correct, sub doesnt turn on at low volumes but at higher than low volumes, it does turn on but doesnt have much thump, it isnt until I get to -20db or higher on AVR volume before I hear a bass to somewhat my liking.

Nopes, just the sub, I can adjust distance for all other speakers...

very strange...first time I've heard that on a receiver, that is a very important missing feature. ?

I don't have distance adjustment on my receiver for the sub, either.

So bump the output of the sub by a couple of dB in the receiver, see if you like it better.

double strange.

Geoff, the 663 does have manual distance adjustments available for all speakers, including the sub, but that wouldn't seem to be the solution for your complaint about the sub level. If the sub trim level on the 663 which showed after calibration(either by YPAO or manually)isn't high enough to send enough voltage to keep the sub amp "awake", you should turn the level control on the back of the sub down farther(say about 1/4th of the way up)and recalibrate(the 663 will have to output more voltage to compensate for the lower setting on the sub's level control).

Then of course, the "thump" that you say that you're looking for may not be a realistic expectation. A sub shouldn't be heard as a separate source; the impression should be that it isn't working but that the other speakers are putting out more bass.

Does anyone thing that the location of this sub is an is an issue? I have attached pictures in one of my previous posts. Itis by my couch, under a table...

It very well could have a LOT to do with your problem. As I mentioned above the ideal place would be up front, however, this is not always possible.

According to John, your receiver should have the distance setting for the sub as well as the other speakers. If this is not setup correctly, the sound from the sub will arrive at your ears incorrectly and skew the results.

A simple move of my sub from the middle front beside the TV, to a corner in the front amounted to a VERY noticeable difference in LFE in my main seated position. Not as drastic as your describing, of course, but there could be multiple things all adding up.

Can't remember if you said you talked to Axiom yet. I'm sure they could help confirm or rule out actual hardware issues.

Havent talked to Axiom yet, I was hoping someone from Axiom stumble upon my post. Hasnt happened yet.