Question about Infinity BU-2 Speaker

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No sound from it.

Is there a simple test to determine if it is working. I am pretty sure the connections are correct.

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I guess it was working all along, but simply would not respond to the test sound from my Onyko. But when I put in a DVD it is definitely putting out sound. So I don't know why it will not respond to the test sound because all the other speakers respond to the test sound. ???
Thanks.

Posted on Dec 09, 2008

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How to trouble shoot a sony sa-wm20 that stopped working


With subs, it's either
  1. a blown fuse (no power at all at the sub);
  2. a broken input (#1 cable, #2 sub input socket, #3 blown sub plate amp);
  3. incorrect connection at the receiver end or the wrong settings
You've ruled out most of this because another sub works in its place. So what's left is either sub settings, or a busted sub.

The sub settings for testing should be: Crossover frequency - Max; Volume - Mid; Phase - Normal.

As a quick test, unplug the sub cab from the amplifier/receiver end. Switch on the sub and turn the volume down all the way. Briefly put your finger across to short the RCA/phono tip and ring. The sub should make a buzzing sound. You now know that the sub is working and the cable appears to be okay or not.

Most subs auto sense a signal. So if the Sony isn't doing that then there's the problem. Given that these are very much a budget sub, I'd be inclined to have a look for something simple such as a broken solder joint or bulging capacitor. If it's anything more indepth then the cost to repair will outweigh the value of a replacement.

Aug 05, 2014 | Speakers & Subwoofers

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My subwoofer powers on, but I get no sound out of speakers or subwoofer and all of connections are correct.


First off....never connect a speaker when the amp is on or vice versa. Second, I would get a tone generator and test that the speakers have not been ruined and check the amp to make sure you did not blow that. Most amps have a protective circuit to prevent damage from over heating or hooking up wrong. Also make sure that you have enough output wattage for the way you have them wired..

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1 Answer

It keeps turning off eventhough the back switch is turned on


You need to determine if its a malfunction of the sub or just due to a loss of input. And is it always in response to, say, over-enthusiastic use?

From the manual...

TROUBLESHOOTING

If you used the high-level (speaker) inputs and there is no sound from any of the

speakers:

• Check that receiver/amplifier is on and a source is playing.

• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between receiver/amplifier and speakers. Make sure all wires

are connected. Make sure none of the speaker wires are frayed, cut or punctured.

• Review proper operation of your receiver/amplifier.

If there is low (or no) bass output:

• Make sure the connections to the left and right "Speaker Inputs" have the correct polarity (+ and -).

• Make sure that the subwoofer is plugged into an active electrical outlet and switched on.

• Adjust the crossover point.

• Flip the Phase Control switch to the opposite position.

• If you are using a Dolby Digital/DTS receiver or processor, make sure that the

subwoofer adjustments on the receiver/processor are set up correctly.

• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.

If you used the line-level inputs and there is no sound from the subwoofer:

• Check that receiver/amplifier is on and a source is playing.

• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between receiver/amplifier and subwoofer.

Make sure all wires are connected. Make sure none of the wires are frayed, cut or punctured.

• Review proper operation of your receiver/amplifier.

• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.

• Make sure that you have configured your receiver/processor so that the subwoofer/LFE output is on.

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1 Answer

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Check all connections - take plugs out and wires out then put them all back again in the correct places. Connections are the biggest problem.Check any fusesCheck there is a signal to play - can you substitute the speaker to test the system?Have you checked the instructions really carefully?http://www.velodyne.com/vproducts/docs/FSX-12%20MANUAL.pdfTry the simple before looking for the complicated!!

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1 Answer

The subwoofer just quit working the green light is on sound comes out (here voices) the subwoofer no bass


if the light still comes on then the fuse is still good....

a possiblity exists that either the amplifier or the actual speaker itself went bad....if you like you can dissasemble the the subwoofer to access the insides....a simple test....if you connect the driver to another amp (any amp will do as this is just a test) and it makes sound then chances are your amp is bad or just a loose connection.

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The signal don't seems to be present to the sub input.
Try change the wire betwen the audio system and the subwoofer.
Spider Guy

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3 Answers

Bass Cube 12 makes loud buzzing noise when turned on !


Hi Ok thanks. I cannot be 100 % sure about this without seeing it but it sounds alot like there is a power supply issue, either bridge rec or caps. Caps are very often very obvious. If you get into it and have a look at what is normally the 2 or 4 biggest capacitors at the start/power supply of the board and see if they are ok visibily. If they are bulged, (often they actually explode and leave paper residue) then those are what need to be replaced. Have a look and see.

If its the bridge rec, it could be 4 diodes, fairly large next to each other or a square component with 4 legs out. Need a meter to test, but i would start at caps first
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• Make sure all cube speaker arrays are connected to the proper terminals according to their
position in your room.
• Check to be sure all wires are connected to your surround receiver with the proper polarity
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• Correct any wiring problems before you plug in your receiver and turn it on.

How do you know the receiver's Left channel isn't the fault? Sounds like a source issue.

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take it back for refund or exchange without delay. Too many times, there are cases of faulty factory assembly. Most likely a poorly connected wire inside sub, which fell off after a few booms.

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