Intermittently soundless LEFT speaker only when power on.

mrlawrencelam

Well-known member
Mar 25, 2022
30
14
45
SIMPLE SETUP:
Marantz CD-5000 CD player + Marantz PM-47 amplifier + One pair JPW P1 speakers.

PROBLEM:
20% of the time when I power up the CD player and amplifier and start playing a CD, the LEFT speaker is soundless. I have to power off the player/amplifier and re-play the CD 1~3 times before the left speaker is fine.

And once the speaker sounds normally, it will work fine even if played for hours.

I have checked the RCA cable between speaker and amp. I have also checked the RCA cable between the amplifier and CD player. I have also cleaned all contact points and changed to banana plugs (before it was bare wire screw-on).

Very weird. Power on off a few times, the left speaker sounds again and won't give problem until the next time I power on/off. And because of this, I doubt the problem is due to poor contact.
 

12th Monkey

Moderator
Firs step of elimination - try powering off just the amp, and after a few times of that, just the amp. At least you'll know which is at fault - it's unlikely to be both. You may also need to try the CDP connected to different amp inputs.

After that, you'll need to swap one end of interconnects and see whether the problem moves from side to side, then swap back and do the same with the speaker cable.
 
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shadders

Well-known member
Nov 19, 2009
455
306
19,270
Hi,
Sounds like a sticky relay. When you turn on the amplifier, do you hear a click after a few seconds and then white noise, low level, through the speakers ?

Regards,
Shadders.
 

mrlawrencelam

Well-known member
Mar 25, 2022
30
14
45
@shadders Yes. With or without the sound from left speaker, the click (or tag-in) sound is always there 2 seconds after I turn on the Marantz amplifier.
 

mrlawrencelam

Well-known member
Mar 25, 2022
30
14
45
Is it power consuming if I leave the amplifier and CD player power-on forever after stop playing music? I will see if the problem occurs if I do so.
 

shadders

Well-known member
Nov 19, 2009
455
306
19,270
@shadders Yes. With or without the sound from left speaker, the click (or tag-in) sound is always there 2 seconds after I turn on the Marantz amplifier.
Hi,
Just to confirm, when there is no sound from the left speaker when you play a CD, then if there is no white noise from the speaker, then it is likely a sticky relay.

It can be replaced, but i would get quotes, as the cost may be close to a new amplifier.

Regards,
Shadders.
 

shadders

Well-known member
Nov 19, 2009
455
306
19,270
Is it power consuming if I leave the amplifier and CD player power-on forever after stop playing music? I will see if the problem occurs if I do so.
Hi,
I would not leave equipment always on, as it does waste electricity - here in the UK the costs have increased 50% a few days ago.

When the amplifier or CD player is off, then the equipment will last longer. Some argue that turn on stresses the components, yet no definitive evidence that this means equipment fails quicker.

Regards,
Shadders.
 

Gray

Well-known member
Found manual in Google. 6w standby power consumption.
There was a time when 6W was regarded as nothing.
No doubt it still is by many people (the type that pick things off the shelves in supermarkets without looking at the prices).

Check your unit price for electricity (measured in kWh)
You get about a continuous week of standby for the cost of a unit.
 
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mrlawrencelam

Well-known member
Mar 25, 2022
30
14
45
There was a time when 6W was regarded as nothing.
No doubt it still is by many people (the type that pick things off the shelves in supermarkets without looking at the prices).

Check your unit price for electricity (measured in kWh)
You get about a continuous week of standby for the cost of a unit.
Checked. It is about US$0.25/month for standby power-on 24 hours/day.
 

shadders

Well-known member
Nov 19, 2009
455
306
19,270
I don't think he is in the States...... It's not that cheap. :)
Hi,
The standby calculation is probably correct, as it is $0.1 per kWh, which for 30 days works out to be $0.43 per month.

For the food - it is possible if you know the right places, or live in a low cost state or area.

Regards,
Shadders.
 
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