Dual Subwoofer Phase question

[am74Gibson]

Hi everyone, I have two MK v125 subs. They have 2 switches each on them. One is to bypass the filter, the other is + or - phase. I just bought a DENON 4308ci which has the Audyssey calibration system/Microphone. It says in the DENON manual to set the filter switch to BYPASS the frequency knob at MAX (120hz ) and the volume at 1/2 , but does not say anything about PHASE. I understand what phase is...but given that I have two of these subs...should they both be set to + ? or one to + the other to - ? Or both to - ? I would guess they both should be at +.

Thanks

 

[TLS Guy]

Hi everyone, I have two MK v125 subs. They have 2 switches each on them. One is to bypass the filter, the other is + or - phase. I just bought a DENON 4308ci which has the Audyssey calibration system/Microphone. It says in the DENON manual to set the filter switch to BYPASS the frequency knob at MAX (120hz ) and the volume at 1/2 , but does not say anything about PHASE. I understand what phase is...but given that I have two of these subs...should they both be set to + ? or one to + the other to - ? Or both to - ? I would guess they both should be at +.

Thanks

Both subs need to be set the same way or they will cancel each other.

Now the phase switch is to make sure they are in phase with you system. Play something with a deep bass content, or better still a test CD and see which has the greatest bass output, when playing the mains full with the sub.

 

[am74Gibson]

Sounds good with both at +

The Audyssey systems really works pretty well. It will tell you if any speakers are out of phase. Much to my suprise my FL and center were out of phase....could've sworn I had them right! I think it reported right since they sound much better now. Also, I recieved a new replacement for one of my new PSB image t55 towers. One came damaged a few weeks ago, and It took a while to get the replacement.

So finally, this morning, I was able to set everything up and use the Audyssey calibration.

Again when Audyssey got to the new speaker I had received, it said there was a problem...sure enough...when I put my ear to the tweeter, there was no sound....so I took out the tweeter and the connector had fallen off ( I am a little suprised they were not soldered...maybe that is something I should do?)...but bottom line...my system sounds pretty darn good now!

I listened to my Elton John/Madman across the water/SACD/Indian Sunset about 10 times in a row!! I like this song for testing because it starts with A-capela singing ( I think that is right) which isolates the center channel, has slow soft parts, piano, violin synth, Crecendo's, discrete BASS lead, and powerful phase shifting drums. I also like this song because I am 1/4 Cherokee! And it has a good but sad storyline.

I had talked to you in another post about adding tweeters to my PSB's ...but after this calibration, I don't think I will need to!