Top 20 Altec Lansing VS2121 Computer Speakers - Page 3 Questions & Answers

You have an internal fault. They are not good speakers and impossible to get inside. It will be the internal power supply Throw them away.

Subwoofer started smoking after about 30 minutes of use?

https://www.reddit.com > techsupport > comments > su... Jun 11, 2020 - Walked into the room, and it was smoking a lot and o could smell burning plastic. ... It's a Dell Altec Lansing ADA995 if it matters. https://www.google.com/search?q=ADA995 ..

3 causes. generic. then real. 60Hz hum/.

1. the PSU inside the SUB is bad, as in bad CAP's inside.
2. input cables to it bad, shields broken (coax cables)
3. bad source signals from what ever is connect to the sub.

in this case (no pun) the main case is the SUB and the PSU is inside the sub so sub bad. or test it with no L/R speakers yet , it still hums or is dead well the main unit is bad and needs service. OR the main has cable from PC to MAIN SUB case. IF this cable is bad, is first check.but that would make L or R fail too. a bad shield will not only effect the sub speaker, (hum) the PC end is only 3 conductors L and R and shield. some are sold double shielded, and are prime to own.. try a new 3.5mm phone patch cable, just in case his fixes it cheap. or the 2 cable ends to PC , phone plugs are lose or dipped in spilled drinks gunk. or PC is bad , ( try other sources , PC, phones, or mp3 /dvd players.) the PC bad would effect R or L too. IMO

Question moved from Blue Computers to Altec Lansing. 'Blue RAY'? or 'Blue TOOTH'? Blue Ray is a digital video format. https://www.google.com/search?q=AL+4005 https://www.fixya.com/support/r26362721-pairing_bluetooth_devices ..

these should help or contact them direct https://electronics.stackexchange.com/questions/100624/short-circuit-or-disconnect-to-bypass-a-compressor http://www.kk4ice.com/?p=570 https://www.google.com/search?q=Altec+lansing+atp3+control+board+schematics ..

Time to throw them away. They used to be a good company, but they aren't any longer. I have had two pairs go bad. My replacement hissed when the power was off. Altec Lansing were not interested that they were live when switched off. All switching off did was was cut the source input. I gave them away and bought Bowers and Wilkins MM1. By far the best speakers I have ever owned.

Bowers & Wilkins MM-1

https://www.bowerswilkins.com > default > files

PDF Digital Signal Processing There's an art to producing a big sound from small speakers. And we've mastered it, thanks to a clever ..

Very unlikely. They are not a good speaker company any longer. They have inbuilt power supply and amplifier board.

If your sub is in a sealed enclosure, access is gained by removing the speaker. If there is an internal circuit board, it may be buried in great wads of damping material.

Numbers do not have to match as long as the Ohms are equal. Usually 8 Ohms per speaker is normal. The low impedance allows you to attach the wires without getting a shock. The most that happens is a tone of sorts. Just align + to + and - to -

They are disposable items, very poorly designed and bad quality. I had a great set early 90's, they failed so I bought another set around 2010. The hissed even when turned off so I donated them!. I bought a pair of Bowers and Wilkins MM1. A whole different ball game in quality, sound and a lifetime warranty. The problem is getting into them as they have secret hidden plastic catches. Go around the seam in the body with a spudger to look for the catches.

A constant low hum is a sign of a power supply issue. You need to check the capacitors that filter the ripple current and you need to check the diodes that convert ac to dc

Contact altec customer service!

Could be a failing power supply

Search the internet.

Most likely be component failure on the circuit board. If so inclined, open the unit and see if there are burnt/discolored resistors. Hopefully you have a warranty and can have the unit replaced

https://www.youtube.com/watch?v=RJOjRjX77x8 https://www.youtube.com/watch?v=T2exU5jdMgE

https://www.ifixit.com/Search?query=Altec+Lansing+InMotion

https://www.youtube.com/watch?v=RJOjRjX77x8

You can buy it online anywhere ebay/Amazon or according to me Aliexpress Homepage as biggest and cheapest worldwide suplier. Yust type the correct name into the searchbox and thats it

Hi Dan Bushey, I'm glad you found a solution, what does not close me is that Altec Lansing, which needs a DC 18volts and 650mA power supply, works with a source that delivers 9 volts and 19KW (???) Maybe it will be 19 volts and 1.9 Amp? Comment please Greetings Franco Dosil Hola Dan Bushey, me alegra que hayas encontrado una solucion, lo que no me cierra es que Altec Lansing, que necesita una alimentacion de DC 18volts y 650mA, funcione con una fuente que te entrega 9 volts y 19KW(???) Tal vez sera 19 volts y 1,9 Amp? Comenta por favor Saludos Franco Dosil https://www.manualslib.com/manual/4749/Altec-Lansing-Avs300.html?page=2