Martin Logan Grotto Connection Problem

[Audio2004]

Hi guys,

I just upgraded my subwoofer from Sunfire Junior to Martin logan Grotto. I used Y cable to connect my Denon AVR 3805 (from preout subwoofer output) to R/L inputs of Grotto. After I connected and turned on the receiver, little sound/noise ssssssseeeee came from all five speakers (front R/L, Center, Rear R/L). I tried to disconnet the sub from the receiver, that sound disappeared. Again, I reconnected it and the noise came back. I did not have this problem before with my Sunfire sub.. Did I do anything wrong? Please help!!!

Thank you very much for your help and have a nice day.

 

[AVRat]

I wouldn't think it would make a difference, but did you try it without the Y-adapter.

 

[captain_tinker]

Hi guys,

I just upgraded my subwoofer from Sunfire Junior to Martin logan Grotto. I used Y cable to connect my Denon AVR 3805 (from preout subwoofer output) to R/L inputs of Grotto. After I connected and turned on the receiver, little sound/noise ssssssseeeee came from all five speakers (front R/L, Center, Rear R/L). I tried to disconnet the sub from the receiver, that sound disappeared. Again, I reconnected it and the noise came back. I did not have this problem before with my Sunfire sub.. Did I do anything wrong? Please help!!!

Thank you very much for your help and have a nice day.

Audio2004,
I haven't had any problems like that with my Grotto. I have one cable from the sub pre-out to the LFE in, and then a stereo cable (L/R) from the L/R pre-outs to the sub L/R in. Do you have your Y cable running from the sub pre-out or sub out through the Y adapter to the L/R input? I am not sure what that would do, as I have not tried that, but I don't believe it should make the other speakers make noise, unless there is some kind of a feedback going back to the receiver? I don't see how. Maybe just try doing the direct connection from the sub to the LFE input and see what happens?

-capT

 

[Seth=L]

How would the sub send feedback to the other speakers?, that is what I would like to know. That seems very strange that it would do that.

 

[Audio2004]

Grotto Connection

When I went home last night, I started to do all kind of connection again and again and I have the same result. I tried to connect from preout of receiver to LFE input of subwoofer. And then I tried to connect from preout of receiver to Left input of subwoofer (in this case, I don't use Y cable). At the end, I thought it probably relates to power. Therefore, I connected the power of subwoofer to another electrical outlet, but the noise still came out from the speakers. I purchased it on Audiogon.com and per seller, it's brand new. Do you guys think this subwoofer had something wrong?

Captain_tinker - why do you connect stereo cable L/R from the F/R preouts to the sub L/R inputs since you already had one cable connect the sub preout to the LFE input?

Thanks.