Question about Audio Players & Recorders

3 Answers

Miller & Kreisel Subwoofer 60Hz hum

When I plug in my subwoofer, I am getting a 60Hz hum, even when it isn't connected to the stereo. I've tried plugging the woofer into a Monster Cable filtered outlet (designed specifically for subwoofers), but I am still getting the same hum. I fear that the sound board may have a burnt out circuit. If this is the case, is there any place that I may send the sound board to have it repaired, now that the Miller & Kreisel company is no more?

Posted by on

  • 2 more comments 
  • camaro11 Jan 04, 2008

    I have a v-125 sub with the same symptoms and was wondering the same thing as you but so far no luck. I think I need a new speaker as I can hear a rattling in it when the bass volume is turned up. There are several shops that repair speakers so my next step is to contact one of them if you hear of anything let me know.

  • rrussell Feb 10, 2008

    The problem started with very low volume. I would turn the source knob up and down rapidly and it would kick in and be fine for a while until the next time I used it. Then many times the same thing would happen. Finally it went out completely. I believe the problem is in one of the circuit boards. does anyone know if you can buy the circuit boards in the Mk2's?

  • shurst3 Jun 29, 2008

    MX-125 subwoofer hums very loud when a signal goes to it. Tried different receivers with different cables. Once a signal gets to the subwoofer it appears to fire over and just hum very loud. Unplug cable and it does not go away. It will only go away when unplugged.

  • ercble Mar 15, 2009

    I have a Miller & kreisel MX-105 subwoofer and when I plug it in and turn up the volume instantly I get a solid bass hum. ercble

×

Ad

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

My MX 200 recently started humming even with no input signal line connected. Smitty8000 was correct and all I had to do was exercise the volume knob to make the problem go away. It seems when it sets for years with out being changed the wiper loses contact. A good vigorous repeated moving of the knob fixed the problem -- at first it made did some thumping while turning the know but this went away as did the hum.

Posted on Dec 27, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

This is a common problem.  The potentiometer is damaged and needs to be replaced.  Potentiometer is a fancy name for volume knob.  It's a $5.00 fix if you know what you're doing.

Posted on Feb 25, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Try using a ground lift on the sub. Good luck.

Posted on Mar 06, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Humming sound cumin from my creative inspire 4.1 woofer


Make sure that you've fully pushed in the jack to the sound card.....maybe you've not connected the jack into the correct socket on your soundcard as there are usually 3 identical sockets...but only 1 is the correct one. Sometimes colour-coded green. Try it in each one in turn. If you have headphones, try plugging them in as you will hear sound in them when you've got the correct socket!

Apr 27, 2012 | Creative Labs Audio Players & Recorders

1 Answer

My Velodyne DPS-10 subwoofer hums when you plug in the RCA cable. The hum increases in volume when you touch the rear metal panel.


hi,
You have to check the RCA cable to the sub woofer. The RCA cabe have two connections inside it, one is for gain and the other is for ground sheild. If the ground sheild is broken then there will be hum from the sub woofer and it will increase if you touch the ground (rear metal pannel is connected to the ground). Replace the cable and check it again.
ok

Jul 17, 2011 | Velodyne DPS-10 Subwoofer

3 Answers

Powered subwoofer has hum


First of all confirm if the hum is an internal or external problem.
Disconnect the RCA sub woofer input from the back of the unit and turn it on. If there is no hum it could be the interconnecting cable or the output from the receiver. But in the stand alone mode if the sub woofer hums when powered on you have internal problem and will have to be looked into by a professional.
Many a time the earth or the shield of the interconnecting cable is the culprit, because the sub sits on the floor and you might shift it for cleaning the floor and the cable can stretch and snap internally.

Apr 01, 2011 | JBL SCS145.5 System

2 Answers

I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...


I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

Mar 01, 2011 | Audio Players & Recorders

1 Answer

When I plug the oudio cable into the sub woofer I get a hum in the system.


Try a different cable, make sure the cable you are useing is not a" twisted pair technology" cable, I have had that type of cable create a hummm in many subwoofers that I have troubleshot. Good luck !

Dec 27, 2009 | Jensen JPS10 Subwoofer

1 Answer

Buzzing sound from woofer when I plug in


If the woofer works fine when plugged into any other port, I would say that you have a connector on the receiver that has a loose connection or possibly a cold solder joint (poor or broken solder joint). RCA jacks can be stressed quite a lot especially if you use cables that have very tight connectors. The female RCA jack gets wiggled or twisted when trying to remove a cable and this causes solder joints to crack. I would have a look at that connector on the receiver..

Mar 02, 2017 | Panasonic CT-35SF23 35" TV

2 Answers

Subwoofer probelm


I suspect you have a bad cable, a poor ground or a bad
power supply inside the speaker amplifier. The amplifier
(inside the sub-woofer) could also be defective.
===
1) Bad cable or connector:
If the (braided shield/outer tube) of the coaxial input cable is
not grounded, the cable will pickup line frequency "hum"
from surrounding power lines, house wires, lights and
appliances.

This hum is then amplified by the speaker's amplifier
causing the constant bass sound you speak of.

Because the hum frequency fundamental is 60 Hertz in
North America, 50 Hertz in Europe, you hear it coming
mostly out of the sub-woofer, because the midrange and
high speaker circuits filter it out.

Check the input connectors, cable at both ends, wiggle
the jacks at a low volume setting to see if it changes.

Make sure that you are indeed using a properly shielded
coaxial cable.

A coaxial cable consists of a thin inner conductor, surrounded
by a flexible tube made up of a braided metal shield, which
must be grounded. This prevents hum from being picked up
by the sensitive amplifier inputs.
===

2) If the power supply within the sub-woofer's internal amplifier
is defective, the the power supply hum will also get coupled
into the amplifier and speaker with same results as above.

Power supply hum is typically twice the line frequency,
i.e. 120 Hertz, but not always, depending on what
component failed: Rectifier diode, filter capacitor, or
the voltage regulator.

3) Ground loops:
When you run very long cables between the source and
destination of an audio signal, multiple ground paths (must)
exist between the two points in space, creating complete
loop circuits.

Power line hum from the environment can (will) induce
heavy AC currents around these loops, creating a voltage
gradient across these cables, and in-between the end
devices.

Once again, this AC hum is coupled into the amplifier inputs.

Ground loops become a problem with cables over 10
feet long, and an astronomical problem for stage audio
engineers. To avoid ground loops, they must break
the circuit's continuity by using isolation transformers,
optical isolators, and/or differential input amplifiers.

So how long are your cables?

Most house stereo components are only designed to
handle 6 to 10 feet of cabling max.

30 feet is already asking for major trouble.

4) Feed back oscillation: This occurs when the output of
an amplifier is fed back to the inputs with a round trip
gain greater or equal to unity. The tiniest little electrical
disturbance is then amplified and re-amplified, over and
over again, usually at one preferred frequency, causing
the typical (ear-splitting) microphone squeal or howl.

In your situation feedback and/ loss of original signal
could be the result of mis-wiring the input cables.

Note that this is NOT as silly nor as unlikely as it sounds,
because many computer audio cards and even some
home stereo systems have re-configurable inputs and
outputs.

SOFTWARE configuration decides which jack at the
back does what !!!!

On my computer, for example, the Realtek audio driver
tries to automatically figure out what cable is connected
to each jack (usually it gets it wrong)

Using the Realtek control panel applet, I can then
manually re-configure the gray jack as input,
the green jack as bass, pink jack as center.... etc.

If this situation also applies to your system, please check
the software configuration. Connecting an output cable to
an input jack will certainly cause a lot of HUM and not
much music.

5) Finally, don't rule out internal sub-woofer failure. Unlike
the passive stereo/hi-fi speakers of days gone by, modern
multi-channel theater systems with front, center, rear and
sub-woofer speakers are internally amplified, with active
frequency cross-over filters and special effect/ surround
sound capabilities.

Usually, the large sub-woofer contains most of the
electronics, amplifiers and filters.

It feeds the other speakers, and it is controlled by
an external volume control module which can be separate
or built into one of the tweeters.

These sub-woofer electronics are prone to poor design,
overheating and early failure. (Even fresh out of the box
like yours)

If you cannot get it working, take it back to the store,
and make the NICE salesmen **** with it.

Good luck
Please rate my answers
Martin.

Jul 20, 2008 | Yamaha 5.1-Ch. Surround Sound Home Theater...

3 Answers

Jbl 12 subwoofer


Good chance it's the power supply; a capacitor there, the large one, may have gone. These things age and when they go, there's noisy power to the amp circuit and ... well, that may be what you're hearing. You should check your audio wiring, too. That woofer could be picking up a 60Hz hum from the AC mains and amplifying it. Maybe you can try another spkr on same cables and see if hum is in your woofer or elsewhere. Good luck.

Sep 10, 2007 | JBL PB10 Subwoofer

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

1,426 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5554 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

75846 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...