Question about Marantz SR-4200 Receiver

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Marantz SR4200 Subwoofer Not Working

I've had my Marantz SR4200 Amp for years now and have only recently tried to connect a brand new subwoofer (Eltax Liberty S+) for the first time. I cannot get any output from the subwoofer at all. I have connected using the manual and changed all the appropriate settings on the Amp so that subwoofer is on etc. but nothing. I've connected the new sub to my PC sound system which had an existing sub (broken) and it works fine. I'm concious that I may need a special cable? or that it might just be a fault subwoofer port on the Amp? Any advice would be appreciated, thank you.

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5 Suggested Answers

  • 2 Answers

SOURCE: very low ouput from subwoofer preout

Onkyo to Onkyo, sub/receiver, problem fixed by inceasing volume on receiver. Seems the sub audio input does not pick up LF's below a certain output level from the receiver. So, guess I have to live with that. I only hope my nieghbor in the apartment below me can too!

Posted on Apr 29, 2008

SOURCE: Subwoofer shutdown

I'm having the same issue as pdoug: Sub rumbles in test mode, doesn't produce sound otherwise. Which makes me suspect it's the receiver itself -- the filter (or whatever) it is that should be separating the bass signal and sending it to the sub is not working. At least that's my guess.

Either way... this sucks.

Posted on Nov 01, 2008

  • 17 Answers

SOURCE: No sound from Sub Pre-out on Onkyo TX-SR606

Also, it could possibly the preout terminal itself that is not working. One way to prove that is by transferring the subwoofer cable from the preout and temporarily transfer it to the tape out section. If it ouputs sound from there, then that means the speaker and the cables are working fine and it's just the preout terminal itself that is not picking up anything. ^_^

Posted on Dec 16, 2008

  • 118 Answers

SOURCE: cannot get jamo 250 subwoofer to work via marantz

hdmi has digital audio in it. no need for optical from same device.
check menu settings in receiver to activate sub, set crossover point and levels

Posted on Nov 04, 2009

dunnbiker
  • 8546 Answers

SOURCE: I have Marantz SR5005 receiver

Only you can know what's different pre/post renovation.

I'd start with the 2nd problem as it may feed into the first one.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Posted on Aug 11, 2011

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