Question about Labtec Pulse 485 Computer Speakers

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Speakers fried a regulator

Myspeakers burnt one of the regulators. and the amount of power going to the woofer and satalite speakers seems to be far more than what it should be. what could be the problem and can i solve it?

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Replace the reguletor & change the satalite speakers. If not solved for more assistance ask me 7-8 days later.

Posted on Feb 11, 2008

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Posted on Jan 02, 2017

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The woofer doesnot work and the horn is working but not as usual


First you need to verify that there is nothing wrong with your amplifier. Simply swap speakers around and see if the fault follows the faulty speaker or stays on that channel. If the speaker is at fault I would hazard a guess and say, that the woofer has burnt out and is now a high resistance. This would then increase the total impedance of the speaker circuit and make the horn speaker sound the way you described. This can be verified with an ohm meter. Total impedance should be about 4 to 8 ohms. The only real remedy is to replace the faulty speaker woofer. Sorry

Mar 07, 2015 | JBL EON 15-G2 Powered DJ Speaker With EQ...

1 Answer

Static on HK395 satalite speakers


It might be beacuse of some sort of wireless interference like a cell phone.

Mar 10, 2014 | Dell HK395 Computer Speakers

1 Answer

MX6050D Subwoofer Issues


Hello, welcome to Fixya!

Fault is either from the main system or the sub-woofer itself.

You need to test both unit in order to detect which of the two is giving the fault, so that you can concentrate on the faulty unit.

Test the woofer with a AA battery or any other battery. Put your ears close to the woofer and observe if you will hear any sound. If the woofer makes sound, then it means the woofer is working, but if it doesn't make sound, then it means the woofer is defective. Or you can disconnect one of the working speakers and connect the woofer to that part. If there is no sound, then obviously, the woofer is defective.

If the woofer seem to be working, then the unit needs to be tested also.

Connect one of the working speakers to the sub-woofer's section of the main unit. If the speaker doesn't bring out sound, check the system's menu settings, check the volume and make sure the sub-woofer volume is raised to the highest level and not on mute. ( Note that most Theater systems has separate volumes for each speakers). If the volume is raised to the highest level and there is still not sound from the woofer part, then it means the woofer channel has burnt. It could be a fuse or a defective channel. At this point, I think you need help from a repairman.

I hope the above is clear.

Regards.

Nov 17, 2011 | Audio Players & Recorders

1 Answer

I need replacement crossover because they got burn


The crossover in these is very simple and if it is burned, likely your speakers, maybe both, the woofer and tweeter have been damaged and need to be replaced. Test the speakers before changing the crossover. You MAY NOT notice the damage until you start driving the speakers again. The voice coil of the woofer is a common thing to fry, and while it may not open up, often it becomes unbonded to the coil form and rubs the magnet pole pieces. The tweeter/horn often wipes out the diaphram or blows the element open. Some of these are piezo horns and they can sometimes survive. These are rated at 100 Watts and if your amp can deliver over 50 watts you have to be careful to not put too much power into these. I have several of the Kustom 10 inch ones and several of the 15 inch ones... Also I have two 15 double stacks and they all seem to use the same crossover. Believe me, the crossover is far from what I would call "special" like the advertisements say. As an electrical engineer I was very disappointed. Anyway, test your speakers as they may be the worst of the problem.

Mar 27, 2011 | Kustom KPC12M / Phonic MAX 1000 Spkr & Amp...

4 Answers

I got logitech speakers X-230 M/N: S-0123A that need ac110-120v- 60 Hz from USA and by mistake plugged it into ac 220 v that is standard in new delhi. there was a spark and smoke from the woofer unit, and...


You have damaged the power supply unit and this would have caused some failures on the power supply and sometimes on the drivers.
So first of all please check the power supply unit, alternatively the DC power required can be supplied by incorporating a new power supply with the same rating but working on 220volt.
repairing the 110 volt supply is no good as you will need again a step down to work , so I suggest this change.

Feb 25, 2011 | Office Equipment & Supplies

1 Answer

My powered sub keeps blowing fuses every time i plug it in..Ive looked it over and nothing seems burnt or broken...It is a MTX sw1212 the sub is fine it's just the amp


check out that the output is not shorted on the terminal strip or near the connectioon to the sub woofer speaker driver.......if not then there is some other problem and you need to take it to a trained technician .......as you yourself can't rectify the problem.....

Jan 21, 2011 | MTX SW1212 Subwoofer

1 Answer

I have a subwoofer in my truck. 2 speakers in a box with an amp. One of the subs blew to a song that just came on. the volume was high. Sounds distorted. Any way to fix?


Sounds like the voice coil of that woofer overheated and melted while it was turned up too far. Now that area rubs on the magnet or pole piece internally and makes noise.

No you generally can't fix that except for a few high end woofer brands that have field replaceable voice coils that you can buy. Most subwoofers physically bottom out and sounds really bad before experiencing thermal damage like that. Sounding bad is a warning sign that it's being overloaded.

Note that woofers have 2 different types of overload conditions that can cause damage.
1. Over excursion from deep bass that moves the woofer cone too far and damages the suspension. This is clearly audible. Proper box design and user knowledge will prevent this.

2. Thermal limit. This is the published power rating that the voice coil can absorb without damage. Things can melt or fail entirely if this is exceeded.

Either of those issues can cause the noise you are hearing. Without a more detailed description of what happened or how it sounds before, during and after this is much detail as I can provide. But.. move the woofer some by hand, do it evenly pushing straight down evenly on both sides, not too far, go about half way through it's normal movement. If it clearly rubs and makes noise internally then the voice coil is damaged or if has some debris stuck in there. Most woofer are not serviceable.

There are many other factors that affect the longevity of the woofer, such as
  • Ambient temperature too high
  • Limited air flow has inadequate woofer cooling
  • UV exposure can make the surround material brittle
  • Proper enclosure design is needed to acoustically and physically supports the woofer to prevent bottoming out, particularly at the system resonant frequency.
  • Amplifier distortion can kill speakers even when rated far below the woofers max wattage.


Nov 28, 2010 | Sony XS-AW200 Car Subwoofer

1 Answer

No power in my altec lansing S100 121i 2.1 speakers


troubleshoot the transformer and try to replace the Opamp (UTC458) on the circuit board. the Opamp might be broken and shorting the circuit and fry your transformer. goodluck.

Jun 26, 2010 | Altec Lansing 121i Computer Speakers

1 Answer

My sub woofer will stop working if i put the bass up to loud, ill have to turn my car off and on to get it to work again. What could be the problem?


Seems like your power amp for the sub woofer may be going into protect mode/thermal overload when you push the volume too much. Therefore it shuts down. I am surprised the speaker hasn't blown yet.

As far as turning car off/on to get it to work, it's as if your car is the power switch.

Amp and speakers may not be wired correctly, as you want to make sure your amp/speaker ohm measurements are within a specific range for the amp and speakers work together properly. You may have it wired for a 2 ohm load, and maybe your amp can't do 2 ohms all day long.

Apr 09, 2010 | Kicker Comp DC12 2-ohm Enclosed Subwoofer...

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