Question about Altec Lansing MX5021 Computer Speakers

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The sub woofer tends to go make a 'disturbing loud and deep crackling sound" every now and then when in use..all functions otherwise are working normally. just had it for over a year

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 277 Answers

SOURCE: Sub Woofer does not work

hi there are fast checkings for you: Quick Connect Card http://www.alteclansing.com/downloads/641QCC.pdf manual: http://www.alteclansing.com/downloads/641_MAN.pdf is the system working fine exept the sub? my guess: the headphone jack works fine then the speakears are too if soo then the sub amp is bad or some connection is torn try opening the sub and see if everything is hooked right and if soo then the amp is the problem every electronics shop can fix this good luck

Posted on Mar 21, 2006

  • 38 Answers

SOURCE: Sub Woofer Stopped working

May be when you turned it, some of the wire connection inside must have got broken or the magnets must have got displaced or somewhere connection would have got loosen check all of this.


Posted on Jul 17, 2008

eagle338
  • 4889 Answers

SOURCE: Sub woofer making a screaching loud noise when powered on

The pop from other electrical items makes me think it's a ground problem but I am do not have a clue as to what type of setup you are running over there. Did you try a surge protector?Is it 110volts with a seperate ground wire?
Have you tried running a UPS?

Posted on Sep 26, 2008

paul7of9
  • 1189 Answers

SOURCE: Rumbling and mild static from the sub woofer. No

These are steps to setup the Audio Theses are steps to restore the drivers for the Audio: Part (1) Click on 'Start' button. Go to, and click in the (right, pane) Control Panel. Scroll to find, "Ease of Access (or) Speech Recognition Options. " Click, on" Replace sound with visual cues." In the See also (Category), click, on Audio Devices, and Sound Themes. Click, Playback, next, click on the Active "Speakers". Click 'Configure' to "Audio channels" The (Speaker Setup) "wizard", appear! Select (Test) click, Next! Follow the instructions. Part (2) Click 'Properties' change the "sound"(Level). Click on Enhancements, "Apply" changes. The (Advanced), not recommended! In, the Controller Information (block), click on, Properties to "update" Drivers. Check to see if Device usage: (enable) if not? "Change it." *Note: Click OK to all changes, 'Save' and Apply!, before exiting.

Posted on Jan 24, 2010

gopakumarg43
  • 73691 Answers

SOURCE: My sub woffer is making a crackling sound but still putting out great bass

Hello
Check all the input connections to the sub for any loose contact.

Posted on Feb 06, 2012

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Box specs and airspace for 8 inch subwoofers


<span>Regardless of your wattage rating on your sub woofer, sub woofers</span> differ in only one way. You get an "Open Air" and a "Closed air" <span>Sub woofer</span>, That being said, you'll have to check on your magnet which one you have, to make the boxes for that particular sub woofer. If it is an "Open air" <span>Sub woofer</span>, you should see a hole with "wire mesh" or "metal grid" in the center, at the back of the magnet. If it is a "Closed air", the magnet will be solid with no hole whatsoever.<br /><br />If it is a "Open air" sub, your boxes should always be sealed with silicone sealant, and no ports are to be cut in your box.<br /><br />Regarding the "Closed air" <span>sub woofers</span>, you should have 2 ports cot in the corners of the boxes just below your sub on the face of the box, and the port sizes should be around 50mm in diameter. Get yourself some 50mm PVC drain piping to use as ports. Firstlycut yourself a 100mm piece and insert flush with the front of the box. Test your sound. then try a 150mm piecs and test again. You should start with a 100mm long piece in the one box and add 50mm increments to "tune" the port up to 250mm, depending on the frequency of bass you require. Carry on testing the sound on each increment until you find the sound you want, Then silicone the port to the box for permanent fixing.<br /><br />On a 15 inch <span>Sub woofer</span> ranging between 80Hz and 100Hz, the ample box size required should be a box of 9 inches high, x 9 inches wide, x 9 inches deep. Or 400mm high, x 400mm wide, x 400mm deep. <br />Enjoy! <br />

on May 29, 2011 | Car Audio & Video

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<span>Regardless of your wattage rating on your sub woofer, sub woofers</span> differ in only one way. You get an "Open Air" and a "Closed air" <span>Sub woofer</span>, That being said, you'll have to check on your magnet which one you have, to make the boxes for that particular sub woofer. If it is an "Open air" <span>Sub woofer</span>, you should see a hole with "wire mesh" or "metal grid" in the center, at the back of the magnet. If it is a "Closed air", the magnet will be solid with no hole whatsoever.<br /><br />If it is a "Open air" sub, your boxes should always be sealed with silicone sealant, and no ports are to be cut in your box.<br /><br />Regarding the "Closed air" <span>sub woofers</span>, you should have 2 ports cot in the corners of the boxes just below your sub on the face of the box, and the port sizes should be around 50mm in diameter. Get yourself some 50mm PVC drain piping to use as ports. Firstlycut yourself a 100mm piece and insert flush with the front of the box. Test your sound. then try a 150mm piecs and test again. You should start with a 100mm long piece in the one box and add 50mm increments to "tune" the port up to 250mm, depending on the frequency of bass you require. Carry on testing the sound on each increment until you find the sound you want, Then silicone the port to the box for permanent fixing.<br /><br />On a 15 inch <span>Sub woofer</span> ranging between 80Hz and 100Hz, the ample box size required should be around 27 liters, meaning that you will end up with a box of 13 inches high, x 13 inches wide, x 13 inches deep. Or 400mm high, x 400mm wide, x 400mm deep. <br />Enjoy! <br />

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Hissing? How loud? A sub isn't even capable of making high frequency sounds at normal volumes.

The Pioneer manual would tell you how to enable and test the subwoofer output.
Page 17 and the MACCV procedures on Page 33 (auto) or 43 (manual)

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I bought my VE-28s and it did exactly that crackled, cerwin replaced part in amp but few months later problem persisted. they then replaced entire amp assembly and its been fine. i really push it to and its been fine. to test it, unplug the connection from amp/ reciever and see if it persists. if so its the sub, if not its the amp/ reciever. dont dump it, these subs really crank and can put out some deep loud bass.

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Your subwoofer is not capable of playing as loud as you want it to. That sound is the woofer reaching its limit. If you have any bass tone setting on your receiver set them to flat. If there are any other bass settings i.e contour, loudness boost etc turn them off. You can also try putting the woofer into a corner. This will increase the output. Closer to you would also be louder. Otherwise you need a sub with more output. Don't let the power rating fool you when you get a new one.

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