TVs & Home Theaters forum

Question

re:powered subwoofer

by depeterson1 / August 22, 2011 12:38 AM PDT

I have a Marantz SR-7000 hooked up to a Boston Acoustics powered sub and recently it has stated to thump or pop whenever i change inputs on the receiver or change channels through the Directv rec.I have the sub hooked through the sub-out jack on the sr-7000.I thought it might be the sub but borrowed a friends and it does the same thing.Anyone have any ideas what might be going on?Thanks

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Clarification Request
SW
by 3coursedinner / August 22, 2011 4:58 AM PDT
In reply to: re:powered subwoofer

How is the sw connected to the receiver -- speaker wires from the receiver to the sw then on from the sw to the front speakers or using 1 rca cable from the sw out on the Marantz to the LFE in on the sw?

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Re:sub
by depeterson1 / August 22, 2011 6:23 AM PDT
In reply to: SW

It is connected by rca cable with a y to the sub in on the sub.

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Re:sw
by 3coursedinner / August 22, 2011 7:23 AM PDT
In reply to: Re:sub

Are there any electric wires near the sub cable?
I don't know if it is convenient to disconnect the rca cables and use speaker wire as I outlined in my first response to see if it happens that way too.
Since it happened with another sw, I would tend to think it's the receiver. Is changing inputs and changing channels the only time it shows this sympton? It sounds fine otherwise?
Did you leave a question for Marantz on their website?

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re:sw
by depeterson1 / August 22, 2011 9:33 PM PDT
In reply to: Re:sw

i took 3course's advice and ran wires to the sub and that took care of the problem.I'm still not sure what caused the other problem though.

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re:sw
by 3coursedinner / August 22, 2011 11:11 PM PDT
In reply to: re:sw

I'm glad that worked for you and maybe isolated the problem to the sw output on the receiver. I couldn't find anything (it's apparently an older model) about this problem on this unit. I was able to find the manual but your problem is not listed in troubleshooting. Is the gain (volume) high on the sw?
Anyway, sorry I couldn't help further. A suggestion would be to read the manual concerning bass management. Since you're going through the sw on to the speakers, you may want to check the speaker settings (large vs. small). If your front speakers are set to small, the Marantz will not send anything less than what the receiver crossover is set to to the front speakers. I would set the speakers to large so all goes out to the speakers. The sw will keep anything less than what the crossover is set on it and send the remaining audio to the speakers. Check the manual for your sw also since you didn't list the model number so I couldn't check it out.

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