Question about Marantz Audio Players & Recorders

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Buzz in amplifier power transformer. The amp is a Marantz Model 240. It functions perfectly well, and there's no noise from it in the speakers, but the transformer buzzes whenever the unit is plugged in and powered up. Can it be fixed without having to replace the transformer? If so, how? Thanks in advance.

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All transformers buzz though you cannot hear it normally. The big transformers on power lines like to buzz for all to hear. When a transformer in a stereo amp gets old and deteriorates or gets hot and  expands the coils, melts the coil varnish and epoxy coatings then rattles at 60 times per second.    You can ignore it or change the transformer. There are too many layers of windings to try to stick anything in there.  Disconnecting a transformer results in inductive kickback -that's not money. It's a big, whopping electrical gotcha! Be careful! Good luck, Steve Medley

Posted on Nov 09, 2008

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4 Answers

Klh powered subwoofer model ASW10-120B... when you plug in to power... it makes a loud buzzing/humming noise


I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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1 Answer

How to adjust input voltage for marantz 4060 quad amp?


The only way would be a voltage selection switch on the back of the unit, or changing pigtail leads on the primary side of the power transformer.

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I am thinking of replacing my now very old JVC AX 330 amplifier with a Marantz PM7003 amplifier and want to know if this is a suitable replacement in terms of power output etc.


You, sir, are a rare adherent to stereo-only electronics. Are you replacing it for cause (showing its age)? The PM7003 is only 2 x 70 watts like the JVC but it also has separable preamp/amps so you COULD upgrade or augment the power output with external amps and still control it all locally.

Of course, any current AVR's do that too and bring digital sources and multichannel audio to the mix for as little as the PM7703 may cost.

Jun 23, 2011 | Audio Players & Recorders

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Dear Sir, Can I use my marantz tower speakers


Yes, the impedance is perfectly acceptable, just that it wont be a perfect acoustical match.

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My powered mixer Behringer is buzzing


Make sure the buzz doesn't happen because of feedback of speakers into mics. When feedback is processed it often goes to a buzz instead of the usual howl.

Also check that you are running adequate inout into the effect since a very low inout will incur digitizing noise and loss of signal=to-noise ratio.

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A load buzzing sound comes out of the speakers. (Harmon/kardon). The transformer is very hot. Unplugged transformer. Unable to purchase a new transfor from E-Tech. They sent me the wrong part number. Plug...


Hi,
Frankly speaking JIM , its better inversting in the new speakers. But however if you can tell the model number for the speakers , lemme check if we can find a power adapter for you.


Thanks for using Fixya
proton

Nov 07, 2009 | Computers & Internet

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Nad c270 buzzing in amp


The buzzing is coming from the transformer. It is almost expected of an amplifier of this size, that the transformer (a large one) will excite the resonance of the casework and make some noise.

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1 Answer

Vintage Stereo Connection ???


Hi spanky

Where to start :) I am excited thinking about them :p You got 2 totally cool pieces of classic vintage gear there in the C2 and the Marantz. I have a C2 preamp myself (gathering dust but wont sell it cos its excellent) and the marantz would be totally cool to have(but then I am a little biased towards 70's vintage marantz). They ruled the roost in HiFi amps throughout that decade.

Because they are both integrated amps, you could use them as standalone systems with a pair of speakers, and just plug your favourite gear into them. If you just wanted to run up a nice sounding HiFi, I would sell the kenwood gear and just keep the Marantz. The Kenwood kr1100 has the edge in power, so if it is grunt you are looking for use that. Because vintage sound is all about stereo, you only really need an integrated amp to get great results.

the specs are
# Kenwood Model Eleven G (KR-11000G) Receiver
120W per channel min RMS, both channels driven, at 8 ohms from 20 to 20.000 Hz with no more than 0.03% total harmonic distortion.
Dynamic power output 440W at 4 ohms
Power bandwidth 5 Hz to 70.000 HZ
Frequency response 5 Hz to 100.000 HZ -1.5dB
Signal to noise ratio 115dB

The marantz is a little lower in power at 75rms a channel, but will have the sonic edge in vintage sound over the kr1100. Look them up on ebay and you will find that they do have some value to collectors and people seeking nice tone. There is an 1152 for sale here for AU$900

Best bet is to fire up the 2 integrated amps,and see how they are going. Run them for several hours to be sure there is no strange noises and crackles. Then decide if you want power or finesse.

You could also run both amps from the C2 preamp by connecting to the Amp in connections to the rear of the integrated amps.

happy to talk to you more about it, hit me with a Fixya if my advice was helpful to you. I would keep the marantz, use that and sell the rest and buy some nice speakers:)

regards
robotek

Jul 20, 2008 | Audio Players & Recorders

1 Answer

How do you connect a Marantz 240 Power Amp to a Marantz 3600 preamplifier? Do you have a diagram?


first preamplifier out-to amplifier line in-or-aux in.,and then amplifier out to your loudspeakers.

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1 Answer

1974 marantz model 2325 reciever and want to hook up a powered subwoofer ?


Hi jdwoomer

BEST WAY
Your amp has PreOut and Main In RCA connectors on the rear, you could make up an adaptor cable (or buy one) to split the post vol control signal at this point, and then use line level from here to drive the sub.

OR

Most powered subs have a speaker "high level" input, where the sub "sniffs" off signal from your speaker output. When setup like this the speakers and amp connect to the back of the Sub.

Either way, you can do it... Marantz were making nice gear back then... a collectable these days :) Any questions, I am here to help.

regards
robotek

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