Question about Infinity BU-120 Subwoofer

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Why do my fuses keep blowing out in my infiniti BU-120?

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Posted on Jan 02, 2017

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SOURCE: Need Sony Part semiconductor 8-729-119-76

I have the part you are looking for if you still are in need of it. Sweet-sounds Mark

Posted on Mar 20, 2011


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1 Answer

Sub making horrible noise even though its not hooked to anything

is it sitting next to any power source if so remove it away from the power source that will not make noisethe sub is just making the frequency noises from electricity

Aug 17, 2014 | Infinity BU-120 Subwoofer

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Loud popping sound came from my powered sub now no sound

Did you have your power on when you plugged anything in if so h could have seized your magnet for fried your voice

Aug 11, 2013 | Infinity BU-120 Subwoofer

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Need Sony Part semiconductor 8-729-119-76 for the Infinity BU-120 Subwoofer

I have the part you are looking for if you still are in need of it. Sweet-sounds Mark

Feb 12, 2011 | Infinity BU-120 Subwoofer

1 Answer

Is there a on of switch and is the green or red light to be on

There is no main AC power switch on the BU series; it's in standby mode whenever it's plugged in.

When playing music normal LED color should be green. After no signal for 10 minutes or so it will turn back to Red (Standby)

Nov 23, 2010 | Infinity BU-120 Subwoofer

1 Answer

My son and I both own Infinity BU-120 subwoofers, and both exhibit the same problem. Fuse is blown, and the C6 capacitor is blown apart -- literally. I was told to replace that capacitor with a 10mfd,...

Msullivan56 & son,

Yes indeed... We are on luck...

There are circuit board layout drawings...
on my Favorite FREE "manual" site ...
starting on page 20

Plz click here...

Infinity BU 120 Service Manual Amplifier subwoofer Bu 120 hts

Hope this helps...

My First "experience" of getting soot embedded in my SAFETY GLASSES... WAS PLACING OF A MODERATE SIZED
"POLAR" filter capacitor in a pretty large RECTIFIER PANEL...

I HAD FOLLOWED the Circuit Drawing ...
(arguably correctly)
as there was very little of it left)) when
POWER WAS RESTORED ... (sort of)

respect for SAFETY GLASSES... looking rather
like a Raccoon (I'm just saying).

Wear them...!!

Carnac the Magnificent

Jul 25, 2017 | Infinity BU-120 Subwoofer

1 Answer

Sub goes full blown loud when plugged in to wall

It sounds like a power supply failure. It needs to go to a repair shop.

May 05, 2009 | Infinity BU-2 Speaker

1 Answer

I have a BU-120 and...

Resistors in sound system tend to burn out with short circuits or bad speaker wires.
The best thing to do get it repaired is to contact the maker of the device and they well let you have the number of the authorised service centre for where you live.

Jan 24, 2018 | Infinity BU-120 Subwoofer

1 Answer

Have a BU2 subwoofer no sound

start by checking for a blown fuse. Sometimes the fuse holder is on the back panel.

Feb 09, 2008 | Infinity BU-120 Subwoofer

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