I haven't used the subwoofer output much since I got my two units. But every time I did it was very poor and low volume.

Now I have a spare sub to use with it I decided to try it again. It's practically useless. I tried EP500/800, 3 SVS subs. All the same. Tried different cables, tried analog input and radio. You can tell the sub is on, there is a little bit of bass coming from it but only with their volumes are on 10. I also have to turn the Air up quite loud in order to even hear the bass in the subs. This is dangerous. I don't ever want my subs on max volume.

Anyone else using their sub out?
Both my Air's are the same.

I never had that problem when I had my Air. I was using it with my cheap Sony sub that has an input impedance of over 600kOhms. Are you using a known good cable?

just a rca cable with a mono jack on the other side.

Can you check the cable on a different system? If the cable is good, the Air's sub pre-amp may not have enough 'nad-mass to drive those subs.

it would be really odd of Axiom designed the Air and it doesn't work with their own EP500. I'm going to get a cable made with the proper connections on each end. I have the advantage of working somewhere that have engineers doing this all day. I'll report back.

It "works" but maybe it's not optimum. If you recall the history, the sub out was a late addition so maybe Andrew did the best he could with way he had. I hope I'm wrong and it's just your cable.

The rumour is the next Air will have a built-in 400W sub, 200W/channel 3-way with detachable speakers and tweetage on the back for omni-directivity; all DSP controlled.