Our new EP175 sounds great with our new Denon 3802. However, I believe I'm having trouble with the auto on/off. In order to engage (auto on) the sub, it's necessary to turn the receiver volume up to loud listening levels. The sub comes on immediately, but after reducing the receiver volume to more comfortable levels, the sub shuts off after a short period of time. While on, the sub sound level seems appropriate, that is, not soft / not loud compared to the other channels. By comfortable levels, the sound is low but not whisper quiet or even quiet; I can clearly hear the music from the next room. When playing music at loud levels, the sub performs as expected.
The sub is connected to the receiver through the line level input on the sub and the sub pre out on the receiver using Monster Cable subwoofer cable 300. Through the sub, the sub volume setting is at the half way mark; through the receiver, all speakers are set to small, the sub is "on", and the sub channel vol is set to 0db (within 1-2 db +/- of all other speakers). I've experimented with changing the sub channel vol on the receiver to +8 and +12 for stereo, 5 channel stereo, and Dolby PL II for TV, CD in CD player, CD in DVD player and tested using those sources, thinking this might boost the signal to the sub and keep it on. That may have helped a bit but only in not having to turn the receiver vol quite as loud to activate the sub.
Is there a way to change the sub auto on/off sensitivity; to make it more sensitive to the receiver's signal? Could it be a problem unrelated to the auto on/off?
I'm also curious about the "audio/video equilization switch" mentioned in the EP175 manual. Where exactly is this switch on the sub?
Thanks in advance for theories, advise, suggestions and remedies. Of course, more thanks to those offering remedies.