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Marantz 6006 Shuts down with M80
#356450 10/10/11 05:08 AM
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Hi guys, I bought Marantz 6006 to go with my M80. The sound is great, however even if I go nominally loud, the receiver shuts down, the blinking red light means that I am using wrongly rated speakers, which is correct, M80 are 4 ohm and Marantz does not want anything lower than 6.

I really love the sound, better than couple of yamaha and denon I have heard, but unfortunately I can't do with the receiver shutting down.

What would you guys recommend, how is Onkyo NR809? Any other receivers that are 4 ohm stable?

Any advice will be much apreciated.

Re: Marantz 6006 Shuts down with M80
Snow #356452 10/10/11 05:27 AM
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despite what some say, i always recommend matching the receiver to the speaker spec's. if the speaker says 4 ohms then get a receiver that states clearly that it is rated or certified with and for the 4 ohm load and you will be in good shape. of course if you could swing it i'd recommend something with pre-outs (or an actual dedicated pre-amp) and get an amp.

of course, there is nothing wrong with a receiver designed to deal with 4 ohm loads. wink

don't endanger your receiver or your speakers trying to make either do what they are not designed or rated to do.

best of luck, please keep us posted!

Last edited by solarrdadd; 10/10/11 05:28 AM.

SonySXRD55"
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Emotiva XPA-5,UPA-2amps,
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Re: Marantz 6006 Shuts down with M80
Snow #356453 10/10/11 05:53 AM
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Snow, welcome. The good news is that the concerns you've expressed are almost certainly unnecessary. Unless your particular unit is defective, the 6006 is easily capable of driving the M80s to beyond safe listening levels. The red light doesn't mean that you're "using wrongly rated speakers", but most likely indicates that an intermittent short exists in the wiring. Examine all the external wiring connections, but even if they look good carefully redo them. This type of problem in the past has often proven to result from a loose strand of wire making contact and causing a short. A more remote possibility is an internal short in the wiring of one of the speakers. Check for this(if the problem still exists)by disconnecting one speaker at a time to see if the problem doesn't appear when it's not connected.

The M80s are being used successfully every day with receivers less capable than your 6006, so again, unless the particular one you got is defective, it's not the problem. Very few receivers can pass the FTC required tests for an "official" 4 ohm rating, but nevertheless they do fine in the real world of home listening outside the testing lab.


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Re: Marantz 6006 Shuts down with M80
JohnK #356456 10/10/11 01:16 PM
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Hi Snow,

Recent Marantz receivers have had no problems driving the M80s. I'm delighted you like your M80s and I'm sure, as JohnK mentioned, it's very likely a tiny short in your speaker connections.

However, check to see if your Marantz has an impedance switch or a setting in the menu for 4 or 6 ohms or 8 ohms. Contrary to what the owner's manual may indicate, do NOT set the switch for the lower impedance. Leave it at 8 ohms. Setting it lower will limit the power supply voltage and current, which might cause shutdown.

Historically, Denons have had no trouble driving M80s, nor do Harman/Kardon, Sherwood Newcastle, NAD or recent Onkyos.

Regards,
Alan


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Marantz 6006 Shuts down with M80
alan #356457 10/10/11 01:41 PM
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Another thing to put on the troubleshooting list is check to see if the M80's are set to large in the receiver. Set them to small with a 60hz or 80hz crossover point if you are using a sub.


I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne
Re: Marantz 6006 Shuts down with M80
BlueJays1 #356459 10/10/11 02:59 PM
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Hi Guys, Thanks for all the suggestions, I trimmed the speaker cable ends more cleanly, I had more wire stripped than needed and the ends were slightly poking out, though red/black were not even close, however its possible the louder volume vibrated them enough so something might have earthed against the receiver body (just speculating).

Anyhow, after the clean trimming to just the required length, this hasn't occurred again. I was listening to On the Turning Away, Pink Floyd, heard it 4 times now and it hasn't occurred again.

Re: Marantz 6006 Shuts down with M80
Snow #356462 10/10/11 05:19 PM
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I would agree with pretty much all that has been said, however, like "Solarrdadd" mentioned, in future, I might suggest investing in one or two outboard multi-channel power amps hence, even using your AVR as a pre-pro and avoiding the possible speaker resistance issue. Dedicated power amps don't become obsolete, power ratings/channel are generally better(and more realistic) and they tend to be more flexible in handling the anomalies of various speaker sizes and models.

Re: Marantz 6006 Shuts down with M80
Snow #356484 10/11/11 02:32 AM
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Very good, Snow. As you see, first impressions often don't actually reflect the reality of a situation.


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Enjoy the music, not the equipment.


Re: Marantz 6006 Shuts down with M80
Snow #368261 02/29/12 03:12 AM
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I have a Denon 3311 running M80's and mine shuts down with the red power light flashing which means its got to HOT and goes into shut down mode. I like to run mine on LARGE to get a more bass full sound with my sub. I put a fan in the tv cabinet to help blow the heat away from the Receiver.

Re: Marantz 6006 Shuts down with M80
Deano #368272 02/29/12 01:52 PM
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Hi Deano,

Check to see if your Denon's impedance setting is at the highest--8 ohms--not the lowest setting. Denons typically have no problem driving the 4-ohm M80 towers. If you set the Denon impedance to the lower setting, it will reduce power output by limiting the power supply voltage and current.

There might be a short from a strand of speaker cable.
The other possibility is that you are running the Denon at levels of loudness in a big room that outstrip its power output capabilities, in which case you may need to add an outboard power amplifier with several hundred watts per channel output.

Alan


Alan Lofft,
Axiom Resident Expert (Retired)
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