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Marantz pm40 problem with left channel, some sound coming through but much reduced volume - this is effecting both main & sub.

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SOURCE: UNCONTROLLABLE SURROUND VOLUME

bad solder connections and or dirty controls.

Posted on Dec 15, 2006

marsrover
  • 682 Answers

SOURCE: Loss of volume on left channel

please repeat speaker setting from your manual and confirm that left channel is ok.-invert left channel plug with right channel plug if the problem moves from left to right you will have the problem in your speaker or its cable-if not the problem in your receiver itself.
you can apply contact cleaner in volume control and move it forward and backward and test.

Posted on Jul 06, 2008

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How come i can only adjust the volume levels on the center, surround sound left and right, and the sub, down but not up? is 0 max volume?


Some equipment use 0dB as the reference, and you can choose to decrease the volume from that point. If you need to "increase" beyond 0dB, you need to reduce volume on the main speakers so the volume is finally balanced between all speakers.

May 15, 2016 | Audio Players & Recorders

1 Answer

I have a Marantz Digital Integrated Amplifier PM75 and experiencing with LP's and CD's that I get a loud popping sound , thereafter no sound until after several minutes when it comes back on.


If the sound is common to both channels plus on different functions, it is either a part that is common to both channels or is in the power supply. It will be either in the main pre-amp or power amp, or power supply. If you can turn the bad sound down, it's before the volume control and it's unlikely to be in the power amp section. If you can't turn the bad sound down, it will be in the power amp section.
Remember stereo amps are two mono amps joined together. So the two channels have separate parts for each channel. However some use IC's that have both channels running in them, they can be suspects in this case.

Jan 11, 2016 | Marantz Audio Players & Recorders

1 Answer

My marantz stereo amplifier PM420 is having a problem of uncontrolled volume and distorted sound output..when putting on higher volume its switch relay on on its main amp. section switch off. Pls help.tnx


The part of the amp you switch in (to get more power) has failed, its probably only on the left or right channel, not both. Its either a pro-repair (expensive) or replace or live-with-it

Dec 14, 2013 | Audio Players & Recorders

1 Answer

I need to know step by step how to hook up my entired system using my macki board. I have a Mackie 1604 Vlz, a power amp for mains, a power amp for subs, a crossover, a vocal effects processor, and a 16...


ok, first thing will be the effects processor. look for the "aux sends" output jacks near the bottom center of the rear panel. run a 1/4 inch instrument cable from "aux send" 3 out into the input on the vocal processor, and run another from aux 4, if the effects processor has 2 inputs. then, from the vocal processors output, run 1/4 inch cables back into the "stereo returns" on the mixer, (located on the rear panel on the bottom, extreme left) 2 outputs per input, since its making stereo effects. so, if you ran just send 3 into the processor, you should have a left and right return instrument cables into the mixer for "stereo return" 3 (left and right). if your processor has 2 imputs, and you are using both "aux send" 3 and 4, then you will have to have a pair of cables going to each "stereo return" for 3 & 4. -to apply effects to a microphone(s), you would adjust the individual aux send levels for each channel you want to have effects, and you would have to ensure that the master aux sends and returns are also turned up..

ok, the snake is simple, each xlr (3 prong mic) connector on the snake is labeled, so, just plug each xlr jack into the corresponding channel on the board, and plug the first 2 1/4 inch ends of the snake into the "C/R out balanced" outputs on the board, located on the rear panel, up and to the left a bit.

at the stage end of the snake, ues a 1/4 inch instrument cable to copnnect the first 2 1/4 inch jacks on the snake to the left and right inputs of the crossover. then, from the crossover, connect the sub power amp to the "low" stereo outputs of the crossover with instrument cables, and connect the main speakers amp to the "high" stereo outputs of the crossover with instrument cables. if its an adjustable corssover, you will want to have it crossed over somewhere about 80-120 hz to allow only the lowest frequencies to the subs.

now, from the amps to the speakers, we ane going to have to use heavier 12-14 gague SPEAKER CABLES, instead of light gague instrument cables. hook the subs up to the stereo speaker outs of the sub amp with speaker cables, and do the same for the main speakers.

Nov 25, 2010 | Mackie 1604 Vlz3 16 Channel Mixer

1 Answer

I want to connect my Marantz 1030 amp to a yamaha YST-SW012


use the left input on the sub. It acts as the main input. Hope this helps

Nov 19, 2009 | Car Audio & Video

2 Answers

Marantz pm 7200 lost sound, only works when volume is up high, still looks like there are no high or medium frequencies.


You have either lost the pre-amp stage or the Main Amp stage. Since you have a problem on both channels it most be a part that is common to both channels. Something like an IC I would suspect.

Oct 31, 2009 | Marantz PM7200 2-Channel Amplifier

1 Answer

Sound from left channel is small and distorted.


The distortion might be caused by a resistor. The loss of volume could be the capacitors, but you could try injecting signals into the transistors to see if any has gone. They can cause the distortion and loss of signal. If you apply a soldering iron to any part it will heat up quicker, or you could also use a hairdryer for the whole thing. You can also get a freeze spray that cools things that have heat sensitive faults (available from electronic parts shops).

Apr 24, 2009 | Marantz PM-15S1 2-Channel Amplifier

2 Answers

Pioneer deck kicker sub 2 mossfit amps


scanman84: i would recommend using the 2 channel 300W amp to drive the dual voice coil alone. i wouldn't combine the single channel amp with the 2 channel. you can't tie the 2 channel outputs together & use that on 1 voice & attach the single channel amp to the other, plus there could be slight differences in amplification & timing which, could cause the sub to have minimal movement or cause a canceling effect which would reduce the spl, sound pressure level. if you need more volume use the lowest impedence speaker recommended by the amp's mfg & if you need serious volume, go with a higher output single 2 channel amp. just make sure you have sufficient wire size to handle high powered amps. example, 8awg wire is rated for 73 amps. also make sure the amp is well grounded with nut & bolt connections to the frame & that there is good ventilation.

peace-out

Jan 06, 2009 | Car Audio & Video

1 Answer

Muffled/bad sound on 1 channel of Marantz PM4400 amplifier


Go directly to the main amp, follow the leads from the speaker terminals. And you should find something on an heatsink. If there are two transistors see if they are running hotter than the other channel. If you see any damage to them (compare with good channel) replace both!
If all you see is a black box with pins coming out of it you need to replace that. They sometimes have the letters STK on them.
Replace both types with the letters and numbers of the same type. IE 2SC 1220 or STK 589.

Dec 17, 2008 | Audio Players & Recorders

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

May 06, 2008 | Marantz PM7200 2-Channel Amplifier

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