Question about Altec Lansing FX4021 Computer Speakers

1 Answer

Altec Lansing FX4021 Control Pad

There is a control pad that inputs through a microphone jack on the subwoofer. It allows me to control volume, bass, treble and turn the system on and off. The control pad is malfunctioning and will turn the system back on after being turned off, will set all the bass/treble/volume levels back to midrange after being turned up. All I need is a replacement part or a similar device from a different manufacturer.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 625 Answers
Re: Altec Lansing FX4021 Control Pad - Altec Lansing FX4021 Computer Speakers Computer Speakers

Try mouser electronics in texas.

Posted on Jan 12, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Altec lansing acs33

the subwoofer plugs into the wall on a 110 volt outlet. then use mastervolume control.. RANDY

Apr 28, 2014 | Altec Lansing Multimedia Computer Speakers

4 Answers

Do u need fx4021 control pod

yes, please mail me on

Sep 27, 2013 | Altec Lansing FX4021 Computer Speakers

1 Answer

My left import wont work. How can i fix this?

Make sure your plug is inserted all the way and that there is no dirt or residue on it. Also you can open the volume panel by double clicking on the volume logo in the bottom right of the start menu. Make sure the balance slider is in the middle for the main volume control.
If this helps, please rank me.

Mar 05, 2011 | Altec Lansing FX4021 Computer Speakers

3 Answers

Very low volume coming from speakers

i have exact same problem i think its got something to do with volume controller on front right speaker damn shame as the sound was awesome

Jun 02, 2010 | Altec Lansing ADA745 4 Speakers

1 Answer

I am trying to hookup my AL subwoofer to my existing comp system.Inserting a wire jack into one of the comp spkrs and subwoofer shuts the sound off.?? It is a FMC0034326 Altec Lansings Subwoofer.Thanks.

You can't just do that. Your sound card needs to have a specific jack just for subwoofers. If you plug it into the speakers, the computer recognizes the subwoofer as a pair of headphones and routes all sound through it. Remember, a subwoofer is not a normal speaker. It only allows a frequency of extremely low sounds (a.k.a. BASS) and won't play anything that you would need a tweeter for.

Jun 11, 2009 | Altec Lansing Multimedia Computer Speakers

1 Answer

Control pad broke

Try at ebay, amazon etc...

Thanks Good Luck
Appreciate to rate as "Fixya"

Mar 10, 2009 | Altec Lansing FX4021 Computer Speakers

1 Answer


the controller chip inside your altec is possibly defective. i have the acs 45.1 and the unit wont turn on.. the culprit is the main power/volume chip.

Apr 30, 2008 | Computer Speakers

3 Answers

Need wiring and 9pin connector diagram

Dell (Altec Lansing) A425 Subwoofer Pinouts

This is a standard female DB-9 serial port.
Here are the pinouts.

Pin 1 = Left Speaker Out +

Pin 2 = Left Speaker Out - (Common Ground)

Pin 3 = Left Line In +

Pin 4 = Right Line In +

Pin 5 = Left/Right line In - (Common Ground)

Pin 6 = Right Speaker Out +

Pin 7 = Right Speaker Out - (Common Ground)

Pin 8 = Power A

Pin 9 = Power B

Jumper (short) Power A to B to turn on.
If you want a volume control you need to put one on the inputs. You will buy buy a stereo volume control or potentiometer.
Here is some info on how to do this.


Mar 27, 2008 | Altec Lansing ADA425 3-piece 30-watt...

1 Answer

Altec Lansing 4.1 ADA880

if you are a technically skilled person
simply clean all the IC(chip) leads, by using a blower or using a painting small brush
the dust come in contact with the other pins that make this problem

Jan 23, 2008 | Altec Lansing ADA 885 Computer Speakers

Not finding what you are looking for?
Altec Lansing FX4021 Computer Speakers Logo

551 people viewed this question

Ask a Question

Usually answered in minutes!

Top Altec Lansing Computer Speakers Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Carlos L. Burgos
Carlos L. Burgos

Level 2 Expert

508 Answers

The Knight
The Knight

Level 3 Expert

66518 Answers

Are you an Altec Lansing Computer Speaker Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides