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Old 08-06-08, 11:04 AM   #1
rushfan
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Subwoofer output on Pioneer receiver


Hi folks,

I have used a Pioneer VSX-1015TX for about 2 years now and I love the sound quality. But just recently I discovered that I am not getting a signal to the subwoofer from the pre-amp output. The sub is definitely working because the level tests the receiver runs plays a test signal every time. I have rerun the MCACC EQ about 3 times and checked the cables to the sub. The subwoofer is an SVSound PB12-Plus/2 and I really don't believe the problem is with it at all. I really believe the receiver is not putting out a pre-amp signal during DVD, TV or Xbox-360 HD-DVD drive playback.

Any thoughts on something I should try with the receiver? I'm kind of at a loss to think of something else to check.

Thanks a bunch!


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Old 08-06-08, 12:17 PM   #2
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Re: Subwoofer output on Pioneer receiver


I moved your post to a new thread to get more views.

Check to make sure that the settings assigned by the MCACC are correct. If your speakers are set to Large, no bass will be sent to the sub. If the LFE is sent to the 'fronts', it will not be directed to the sub. When did this problem begin?


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Old 08-06-08, 03:11 PM   #3
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Re: Subwoofer output on Pioneer receiver


I know it sounds crazy but I don't know for sure when it changed. I have been working with the settings for a while now and I am quite sure that the speakers are set to LARGE. That is probably my problem as you suggested.

For two reasons I didn't realize the sub wasn't receiving a signal: I watch more regular TV by default in the theater and that rarely needs the sub anyway. That's not why I built the theater but it happens because my wife and I use the theater everyday and we watch a good bit of TV rather than always putting in a 2+ hour movie. Second, the Infinity tower speakers have large woofers and the bass is pretty good anyway. I mean the SVSound sub blows them away. But until you get to the really demanding stuff the speaker woofers do a lot for me.

I guess this sounds a little crazy that I wouldn't have noticed sooner but I really can't say how long it has been. Again though, your suggestion about the speaker size settings is probably it. Thank you so much for the good feedback. I'll try that as soon as I get home!


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Old 08-06-08, 03:43 PM   #4
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Re: Subwoofer output on Pioneer receiver


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rushfan wrote: View Post

For two reasons I didn't realize the sub wasn't receiving a signal: I watch more regular TV by default in the theater and that rarely needs the sub anyway... Second, the Infinity tower speakers have large woofers and the bass is pretty good anyway. I mean the SVSound sub blows them away. But until you get to the really demanding stuff the speaker woofers do a lot for me... I'll try that as soon as I get home!
There's some OTA programs that can make your sub work (CBS and NBC miniseries for example ) and even if your speakers are set to large, your sub should get something (I have JBL Stadium (two 8" woofers each) set to large and sub gets a signal too).

I also recommend to check the settings ... crossover, LFE signal, etc. before changing the speakers to small (unless that's the way you use them) ...


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Old 08-09-08, 11:11 AM   #5
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Re: Subwoofer output on Pioneer receiver


That's great folks! Thanks!! The sub is working again and oh what a difference. I had never heard of the sub not working when the other speakers are designated large size. It makes sense but I was just unaware. "Much to learn I still have!!"


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Old 08-09-08, 12:01 PM   #6
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Re: Subwoofer output on Pioneer receiver


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... "Much to learn I still have!!"
That is true ... I'm always learning something everyday

I'm glad you fixed the problem ... and that Was???


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Old 08-09-08, 02:48 PM   #7
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Re: Subwoofer output on Pioneer receiver


Just like thxgoon told me, that the other speakers in the system were set to LARGE. Apparently not just on my receiver but on most theater level receivers if the other speakers are set to large size the receiver doesn't "waste" power on the LFE to the sub because that is being dispersed to the "Large" speakers. And its true that my front tower speakers were getting more bass than I originally intended since the crossover was removed.

But as thxgoon suggested, I changed the settings to small speakers and the pre-amp starting outputing the LFE to the sub again. I had originally set them to small but fairly recently I set them to large (not really understanding the ramifications of that) and lost the sub; I just didn't know to make that connection between the two events. Since the sub frequencies are sent via the pre-amp output I still don't understand why it is setup this way but someone must think that is the way it should work. I guess if the truly large speakers were outputting LFE then there might be an audible conflict between those and the sub. Sound reasonable?

But I recognized the offered solution because I remembered specifically setting those speakers to "large". One quick change in the settings and everything is back to normal.

Thanks for your help and interest too salvasol. Take care!


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Old 08-09-08, 04:49 PM   #8
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Re: Subwoofer output on Pioneer receiver


Quote:
... Thanks for your help and interest ...
I think we're here to help each other and learn ...

Quote:
rushfan wrote: View Post
Just like thxgoon told me, that the other speakers in the system were set to LARGE. Apparently not just on my receiver but on most theater level receivers if the other speakers are set to large size the receiver doesn't "waste" power on the LFE to the sub because that is being dispersed to the "Large" speakers. And its true that my front tower speakers were getting more bass than I originally intended since the crossover was removed. ...
Also, even if you set your crossover properly (80Hz) and set all speakers to small ... but you set your receiver to send the LFE/bass signals to the front your sub won't get anything.

Some receivers have the option to send LFE/bass to front, sub or both ... in my case is set to send to Sub and front speakers are set to large (it feels like having 4 subs - I use two subs + L & R)


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Old 08-09-08, 05:01 PM   #9
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Re: Subwoofer output on Pioneer receiver


Glad to hear you got it figured out .


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Old 08-13-08, 01:35 PM   #10
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Re: Subwoofer output on Pioneer receiver


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rushfan wrote: View Post
But I recognized the offered solution because I remembered specifically setting those speakers to "large". One quick change in the settings and everything is back to normal.
As just an fyi, I have the Pioneer 1014 and it will combine the low frequency output to both the front speakers and the sub pre-out. You can set this up in the MCACC menus.

This also means, if you are running REW on a BFD, that you will have to plug into the receiver to do your sweeps. Otherwise you could end up with some unwanted and unknown peaks and valleys in your low frequencies.

Enjoy!


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