Infinity BU-120 Subwoofer - Answered Questions & Fixed issues

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.

Time for a new one. Yours is shorted out internally, and could possibly start a fire inside itself. God bless your efforts.

Msullivan56 & son, Yes indeed... We are on luck... There are circuit board layout drawings... on my Favorite FREE "manual" site ... starting on page 20 (SHOWING POLARITY)... 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)I came out of the EXPERIENCE WITH AN ENDURING respect for SAFETY GLASSES... looking rather like a Raccoon (I'm just saying).Wear them...!! Carnac the Magnificent

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

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

Disconnect the sub-woofer and see if the noise stops, if so the amplifier is OSCILLATING and so produces the noise.This can be related to fault with the pre-amp or audio processing section. Try and heat up the circuit using a hair dryer and if the fault clears then there are faulty electronic capacitors. If leak is seen then the pcb must be washed after the capacitor is replaced which can solve the issue.

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

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)

Shorted to ground.

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

Yea, now its time to replace it! the magnetic effect is weaken which makes the very bass low frequency sound to be distorted! You should re engergise the magnet of the subwoofer or should buy the new!

Unlikely, but open it up and take a look. Some help here.

Rebuild Infinity SSW-210 Subwoofer - AudioKarma

https://audiokarma.org > ... > Speakers Jan 27, 2021 - One thing to be aware of is that the SSW-210 is a (sort of) servo subwoofer, which you won't be able to replicate. I have one working and one ... Infinity SSW-210 question - Audiokarma Oct 9, 2018 The design theory behind Infinity's "servo" subwoofers? Nov 3, 2017 Vintage Infinity Servo Subwoofer vs modern - AudioKarma Dec 23, 2015 SSW-210 Servo Subwoofer question - Forums - AudioKarma Jan 22, 2009 More results from audiokarma.org

Info on Infinity SSW 210 Subwoofer?? - ecoustics.com

https://www.ecoustics.com > forum > home-audio Oct 21, 2002 - Does anyone have any information on this great powered sub? Infinity SSW-210? (SERVO SUBWOOFER WITH 2 10" DRIVERS) I'm having no luck ... 10 posts · In the the early to mid 90's Infinity made the SSW-210 and the SSW-212 ( 250 and 300 ...

Infinity Servo Subwoofer How to? ' AVS Forum

https://www.avsforum.com > threads > infinity-servo-su... Dec 26, 2009 - I picked up an Infinity Servo Subwoofer yesterday, but not quite sure as to how to ... The SSW-210 or SSW-212 have two drivers and no port.

Take it out and get it repaired. Or you can swap for one from a breakers yard. https://www.google.com/search?q=2004+kia+amanti+radio+replacement ..

Possible shorted speaker wiring or a shorted voice coil in one of the speakers.

Have you connected it to another amp to confirm its the sub not working?

The loud humming is the sound of AC mains - clearly your amplifier is receiving an input from somewhere and possibly into the front end. The hum could be induced by radiated energy from nearby unshielded equipment, it could be the result of an accidental hum-loop or could be because the amplifier power supply has a fault. It is usual practice with amplifier construction to ensure unused inputs are shorted to ground by switching or by additional contacts and wiring at the input sockets. High gain high impedance inputs can cause a great deal of unwanted noise if they are not shorted. I suggest you read the instruction manual and perhaps Google a few hints and tips about amplifiers and stuff.

There is a photo of the amp board here: http://badcaps.net/forum/album.php?albumid=40&pictureid=102 You need to remove the plate amp from the speaker (be sure it's unplugged!) and you'll see the fuse. Replace with exactly the same thing--don't go up in amperage. BUT... if it blew a fuse something is wrong. Those amps do have a tendency to over-heat but if the new fuse blows you should have the amp serviced. Or junk it.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Search the site by type in the brand name to your device, in the "Search box at the top right of the display window" to get gathered related posts.

Could be many things. The control panel on these have been notoriously problematic (check the forums). Mine sat for a couple of years because it would power on. It just took longer and longer and then nothing. But I couldn't part with it; the way it made the house feel when it worked. But there doesn't seem to be any repair shops around anymore. So there is this shop on Ebay watched and checked the feedback. I coughed up the $178 and they did something to fix it. I don't know what. I don't care. It worked. Here is the link, looks like they are still doing it. WE REPAIR INFINITY HPS1000 AMP JUST SEND US YOUR NON WORKING AMP WE REPAIR...

Yes I've been there !!!! Twice