MTX Audio SW2 Subwoofer adjustments?

[Reesche]

Hi you guys I have a question on adjusting my MTX Audio SW2 Subwoofer.

I have had this subwoofer for years and I reciently heard some distortion or overload sound from a movie last night. I would like to check my settings to see if every thing is correct.
It is hooked into my Denon Reciever via the OUT and into the Denon Subwoofer jack. I have 2 satellite speakers hooked up too.

See Attachments.

The only adjustments are...

1. Level knob
2. Crossover knob
3. On-Auto-Off switch
4. 0 - Phase - 180 switch

It has been awhile.... so if you can direct me how to set up the adjustments I would appreciate it!
Thank you!

Reesche

 

[DVDdoug]

I have had this subwoofer for years and I reciently heard some distortion or overload sound from a movie last night.

Possibly you were listening louder, or the particular movie had unusually-strong bass, or bass in different frequencies than usual. If you push a woofer/subwoofer hard at frequencies lower than it can go, you can get noise/distortion.

Adjust the level to taste. Because of the Equal Loudness Curves, when you turn-down the volume it sounds like you've turned-down the bass even more so you might want to adjust if from time-to-time depending on how loud you are listening at the moment. Or you may just want to turn it up to "experience" strong bass even when listening at lower levels.

Since you are using the receiver's crossover (it has a dedicated sub output) you can turn the crossover to the maximum frequency.

Auto on/off is up to you.

Usually the phase should be set to zero so that it's in-phase with your main speakers (in the crossover range where they are both operating). But distance can make a difference in phase (related to the speed of sound) if you are closer to your main speakers or sub. Or, there could be a room resonance at the crossover frequency and making them out-of-phase can knock that down. So try it both ways. You'll only notice a difference if there is sound at the crossover frequency so you might not notice it right away. And it's best if someone else operates the switch because room resonances depend on where you are in the room.