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MY CD PLAYER MAKES A POPPING SOUND AT TURN ON

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Posted on September 6, 2021 at 23:16:19
Will G.
Audiophile

Posts: 30
Joined: January 15, 2002
 Hello folks,

I purchased a Marantz CD6007 CD player.

When I turn it on there's a moderately loud popping sound coming from the right speaker, one time only.

Also, when I turn off the player there is a milder popping sound emanating from both speakers.

The player has 2 filters, and when set to filter 2 the pops are even stronger.

The player seems to work fine after that.

The first 2 or 3 times of use this did not happen.

I have made sure there are no loose connections of any AC cord or interconnect.

Is this something serious?

Any recommendations how to fix this?

Thanks for any suggestions.

 

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RE: MY CD PLAYER MAKES A POPPING SOUND AT TURN ON, posted on September 7, 2021 at 02:39:31
musetap
Audiophile

Posts: 31866
Location: San Francisco
Joined: July 8, 2003
Contributor
  Since: January 28, 2004
 Source(s) sometimes make noise/sounds on start-up.

Frequently it's just electricity making its way through the system, the circuit
doing its thing.

This is one reason to ALWAYS turn your amp/receiver on LAST when powering up.

Also the reason to turn your amp/receiver OFF first.

This will help protect your speakers from making popping noises on power on/off
and any ill effects the circuit might have in the process.

Hopefully this is all you need to do to avoid the popping sound and that your CDP
otherwise is AOK.

"Once this was all Black Plasma and Imagination"-Michael McClure



 

RE: MY CD PLAYER MAKES A POPPING SOUND AT TURN ON, posted on September 7, 2021 at 02:40:46
Todd Krieger
Audiophile

Posts: 37333
Location: SW United States
Joined: November 2, 2000
 I would presume you have the volume turned all the way down when you power up the CD player..... That's a common oversight that would cause turn-on "transients" out the speakers.

If you had the volume turned all the way down and getting the turn-on "pop" in spite of that, it could mean you need some mains isolation (Tripp Lite, OneAC, or Topaz transformer) between the mains line and your CD player. The turn-on of your CD player could be drawing enough current to disrupt the power (momentary voltage sag) to the downstream gear. (This issue is less common, but can still happen if the "resistance" of the wiring between the breaker box and outlet is relatively high.)

 

RE: MY CD PLAYER MAKES A POPPING SOUND AT TURN ON, posted on September 7, 2021 at 05:44:29
fstein
Audiophile

Posts: 2994
Location: fstein
Joined: May 18, 2006
 leave it on

 

+1 n/t, posted on September 7, 2021 at 06:01:02
PAR
Audiophile

Posts: 1732
Location: South London, UK
Joined: June 4, 2019
 n/t
"We need less, but better" - Dieter Rams

 

I can't hear you.... nt, posted on September 7, 2021 at 06:32:25
tinear
Audiophile

Posts: 65782
Location: Kansas City, KS
Joined: April 9, 2006
 j

 

Don't turn it off. . ., posted on September 7, 2021 at 06:38:17
hawkmoon
Audiophile

Posts: 903
Location: cleveland
Joined: July 11, 2003
 It will also sound better.

 

+2 n/t, posted on September 7, 2021 at 20:05:02
AbeCollins
Audiophile

Posts: 46277
Location: USA
Joined: June 22, 2001
Contributor
  Since: February 2, 2002
 .

 

Not all electronics Gizmos are Created Equal.. plus there is Aging, posted on September 9, 2021 at 09:31:28
bare
Audiophile

Posts: 1878
Joined: April 14, 2009
 One workaround for Poor Or dying Gear (spare me) is as stated below.. to turn on the amplification Last and Off First.
Other is to find quality or healthy Gear that Does Not do this.

 

One of my amps makes an initial pop too , posted on September 9, 2021 at 11:23:13
Chris from Lafayette
Audiophile

Posts: 26422
Location: SF Bay Area
Joined: February 17, 2004
Contributor
  Since: February 6, 2012
 It's an old Carver amp from the 90's. It's always done this and always will. No biggie IMHO. I've read that some equipment also has delay circuits which will briefly mute the sound until that initial "pop" has passed - so the owner never hears it.

 

DC Offset?, posted on September 9, 2021 at 12:12:49
Todd Krieger
Audiophile

Posts: 37333
Location: SW United States
Joined: November 2, 2000
 I've generally found, often with vintage solid state amplifiers without protection/delay circuitry, if there is a DC offset present, it will come forth as a "transient" out the speakers at power up..... (Especially if the transient happens to be notably louder from one stereo channel than from the other.) The solution is to find a tech who can adjust the transistor bias, which tends to drift over time.

Another symptom of DC offset with solid state is elevated and/or uneven heat emissions from the heat sinks. The elevated heat can over time lead to transistor failure.

 

Thanks, Todd - I appreciate the diagnosis of the possibilities, posted on September 10, 2021 at 00:43:57
Chris from Lafayette
Audiophile

Posts: 26422
Location: SF Bay Area
Joined: February 17, 2004
Contributor
  Since: February 6, 2012
 But as I mentioned, I've had this amp since the 90's - it doesn't seem to get particularly hot (it's class AB), and I certainly haven't had any transistor failures (yet! - knock on wood!).

EDIT: That reminds me though - I need to update my "inmate systems" page. This Carver amp is now being used to power my pair of Dolby Atmos "height" speakers - little Focal bookshelf models, which I borrowed and pressed into service from the system in my computer room. Replacement computer room speakers (Dali Oberon 1's) should arrive any day now.

 

RE: Thanks, Todd - I appreciate the diagnosis of the possibilities, posted on September 10, 2021 at 07:41:15
Todd Krieger
Audiophile

Posts: 37333
Location: SW United States
Joined: November 2, 2000
 "But as I mentioned, I've had this amp since the 90's - it doesn't seem to get particularly hot (it's class AB), and I certainly haven't had any transistor failures (yet! - knock on wood!)."

The bias can also drift the "other" way..... The transistors start running "cold"...... But it will still cause DC offset...... (If the bias drifts "cold," this increases "crossover distortion" in the amp's output waveform.)

When it comes to drift in bias, it's a crapshoot..... Some transistors will drift "hot," others will drift "cold,"..... And hopefully, the drift in a given case remains minimal.

Generally speaking, Class AB amps run/idle "moderately warm" with ideal bias..... (Class A amps run a lot hotter.) The devices are running "on" but not running "hot"......

The best way to check of the problem is DC offset with vintage gear, if there are otherwise no warning signs with heat sink temperature, try to get an identical piece, and find out if the "turn on transient" is better or worse than your existing unit..... If it's about the same, there is a good chance it's just a normal characteristic of the amplifier.



 

Can we rule bees out? Nt, posted on September 10, 2021 at 08:15:22
geoffkait
 Nt

 

The 0.01uf cap that bypasses the power switch has failed, posted on September 10, 2021 at 10:44:27
Ralph
Manufacturer

Posts: 4769
Location: Minnesota
Joined: April 24, 2002
 or worse, isn't present.

 

Thanks for the additional detail! [nt], posted on September 11, 2021 at 00:09:49
Chris from Lafayette
Audiophile

Posts: 26422
Location: SF Bay Area
Joined: February 17, 2004
Contributor
  Since: February 6, 2012

 

RE: MY CD PLAYER MAKES A POPPING SOUND AT TURN ON, posted on September 11, 2021 at 04:24:03
Jonesy
Audiophile

Posts: 3156
Location: Winnipeg, Manitoba
Joined: September 1, 2005
Contributor
  Since: March 1, 2018
 That's a well built current model cd player. Perhaps you can have if looked at under warranty if it worked fine before the symptoms showed up.

But first you need to confirm the issue is with the player and not one of your other components.

You mentioned popping in the right channel upon turn on. Try reversing the left right interconnects at one end to see if the problem follows. If the problem does follow, also replace that channel interconnect altogether to make sure it's not a faulty cable.

On the AC end of things, you may try plugging the player into another outlet separate from your system. Even if it means using an extension cord. This should reveal if it's an AC issue in either the player or something else in your system. Still odd that if was originally fine though.

Jonesy


"I know just enough to get into trouble. But not enough to get out of it."




 

He's talking popping, not buzzing... N/T, posted on September 11, 2021 at 11:00:58
musetap
Audiophile

Posts: 31866
Location: San Francisco
Joined: July 8, 2003
Contributor
  Since: January 28, 2004
 a

"Once this was all Black Plasma and Imagination"-Michael McClure



 

RE: He's talking popping, not buzzing... N/T, posted on September 11, 2021 at 17:39:01
geoffkait
 Exactly, that's why we can probably rule out bees.

 

RE: The 0.01uf cap that bypasses the power switch has failed, posted on September 11, 2021 at 23:57:54
Will G.
Audiophile

Posts: 30
Joined: January 15, 2002
 Hello Ralph, do you happen to know which Marantz CD6007 circuit board this cap is located? Thanks for your help.

 

RE: MY CD PLAYER MAKES A POPPING SOUND AT TURN ON, posted on September 12, 2021 at 00:05:04
Will G.
Audiophile

Posts: 30
Joined: January 15, 2002
 Hello Jonesy, I will try your suggestions. Thanks for your help. Regarding the warranty, I live on a small island in the Philippines and it all gets complicated, expensive and time consuming.

 

I don't, but usually such a part is on the switch itself. nt, posted on September 13, 2021 at 09:53:14
Ralph
Manufacturer

Posts: 4769
Location: Minnesota
Joined: April 24, 2002
 -

 

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