Question about ElectroVoice SxA180 Subwoofer

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Help repair EV SxA180 sob woofer

I need schematic for SxA180 Sub woofer or what is the part number of power transistors they use?

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Q10&Q10B IRF6215 Q11 IRF3315

Posted on Jan 09, 2009

  • AJ Vincelli Jan 03, 2014

    Wow, I have no idea how you knew the transistor numbers but good job! I need Q10, Q10b and Q11 fets for a Boston Acoustics MCS130 subwoofer, any idea if they are the same part numbers? I thought the Q11 part was IRF9640, but I could be wrong. Hard to read. Thanks for the help!

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Which is the Transistor number q10

Posted on May 27, 2014

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I open my b212a and disconnected the speaker and horn wires and know i have completed my repair i am read to reconnect and i don't remember which set of wires are the positive side


Because the system is bi-amplified, it is important to replace the wires correctly to avoid phase problems. I don't know how the wires are colour coded, but if it is any help I downloaded the schematic and the wires are numbered 1: Woofer Active 2: Woofer Earth
3: Tweeter Earth and 4: Tweeter Active. Sorry if that's no help. Otherwise it should be easy to trace the wires to see which connect to earth.

Dec 12, 2013 | Behringer Eurolive B212A Speaker

1 Answer

Subwoofer not working


do you have a red led or nothing? the problem that has been happening with these sub woofers is the two power transistors are going they are TIP31C and TIP32C on the power supply board. Also the resistors are going bad after that and the two bigger caps on the pwr supply board need to be replaced. you see the caps blow which cause the power to peak and dip in the power amplifier and then peaks too much blows the transistors and then all of the resistors.

Sep 13, 2010 | Harman Kardon HKTS 10 System

3 Answers

Sub woofer produces a very loud low tone


This model has a high failure rate with the power supply board. Typically, power resistors fail, which in turn burns out the big capacitors.

I have not heard of transformers failing though, so it shouldn't be too much to repair it.

Here are the schematics for the unit: Upper board and Lower board

Dec 31, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Velodyne sub woofer: Series S Model: VA08BVX10


The volume control pot can be replaced.

Any good quality audio shop or electronics repair shop should be able to fix this.


Nov 17, 2009 | Velodyne SPL-1000 Subwoofer

1 Answer

Subwoofer.......


Please check your model number, I can not find it on the JVC service website.

This is a powered sub-woofer I think. You need to have a thick black cord that connects the sub to the head unit. Then the satellite speakers get connected to the speaker jacks on the sub-woofer box. The sub-woofer should also be plugged into an A/C outlet on the wall.

The speaker outputs are labeled right there where you connect the speaker wires. You should see a red and black connector for each speaker and they are labeled "front right" "front left" "center" "rear right" "rear left".

If you do not have the thick black cord you need to connect the head unit with the sub-woofer, you can not use this system.

If you look at the head unit and give me the model number on it, I may be able to find the part you need. But I must have a good model number to work with, preferably from the head unit.

Dave

Nov 10, 2008 | JVC SPPWA670 Subwoofer

1 Answer

Bose acousticmass 15 sub-woofer making a noise


The sub contains the amp for the other speakers. But it sounds like the amp has a seriously damaged section and will probably have to be serviced by Bose.

Jun 24, 2008 | Bose Acoustimass 15 System

1 Answer

Subwoofer not working


if u are a technician then its easy to check, problems are, blown fuse, power amp IC output transistor may be blown, check for burnt componenets. changing and blowing a fuse means ur output IC or transistors are shorted.

May 15, 2007 | KEF Audio KHT 2005.2 System

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