Question about KEF Audio HTB2 Subwoofer

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HTB2 subwoofer broken

No mains light, fuse ok. need to open the case but no screws visible

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Kef htb2 subwoofer not working plug fuse ok sub fuse ok is there an internal fuse

If you have external fuse there will be none internally. Chances are you have blown the amp if power is confirmed to be getting into the unit and there is no sound.

Sep 16, 2017 | KEF Audio Players & Recorders

1 Answer

How do I open up a Kef egg speaker

9aa4f771-e31b-4b6e-a152-d7f1795ba2f6.jpgRemove the rubber ring around the speaker, by pull gently outwards. then remove the speakers or resonator. if necessary remove the other side as well

Jan 26, 2012 | KEF Audio HTB2 Subwoofer

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Microven doesn't work.

same problem here.
I just unmounted it and checked.
Main things you'd better check (if able, otherwise contact assistance..) :
- Unmount, open the top (5 screws)
- microven fuse (open the top, standing in front look right top corner, there's a small circuit with wires and a black plastic case with a 250V 8A fuse in it): check it's ok
- microven transformer: it's the big one on the rear top, you need to check primary and secondary wires for short circuit (that's why the fuse blows up in case)
- magnetron: if both previous ones are ok, check (I can't say how except for getting a new one and trying..) and eventually replace the broken one.

Hope this helps

Sep 29, 2010 | Smeg S201X Electric Single Oven

1 Answer

No power. Fuses ok. Power transformer ok. Screw came out of circuit board, but no visible damage.

If a screw was bouncing around in the case it could have shorted something causing damage...

Make sure the power adapter is the EXACT one that is used for the unit.

Check the circuit traces from the power connector under a bright light. A short can sometimes "fuse" narrow traces burning them open just like a fuse.

If you haven't done so, check the power adapter with a meter to verify the voltage.

Sep 10, 2010 | Audio Technica ATW-R12 DIVERSITY RECEIVER...

1 Answer


Open the hood and look for the engine compartment fuse block next to the driver's side firewall. Open the cover in order remove and inspect the fuse closest to the radiator labeled ING (Ignition) to see if the fuse connection is visibly broken or blown. If it is OK open the fuse panel located at the left end of the instrument panel inside the vehicle. To open, push the tab on the access door to the left and pull the door forward. Remove and inspect the two top right fused labeled IGN and PCM/IGN to see if the fuse connection is visibly broken or blown. Replace any defective fuses and try to start the vehicle. If it starts it could have been a bad connection or a more serious problem requiring service if the fuse keeps blowing. If it does not start it could be the ignition switch or starter.

Jul 27, 2010 | 1999 Chevrolet Cavalier

2 Answers

Mirage s8 subwoofer is emitting a constant hum

that is just the radio from the input,its normal

Jun 19, 2010 | Mirage Prestige S8 Subwoofer Speaker

1 Answer

How to open the subwoofer housing to change the fuse

on the back unscrew all the screws (there should be 8 in the plastic square around the jacks... and then undo the four that are in the wooden back) then pull out the plastic square, it will take a decent amount of force, try prying with a flat head screw driver. Once you have that out, you should be able to access what you need inside.

May 30, 2010 | Altec Lansing VS4121 Speaker

1 Answer

1994 Cadillac Fleetwood, tail lights not working, brake lights fine, fuses fine, headlights fine, turn signals fine, bulbs tested ok.

If you remove the whole casing of the rear lights, you should see a single wire connected to the body / chassis of the vehicle. Remove the screw and clean the contact point by using a bit of sand paper. Replace the eath wire and test. In most cases the ground wire does not make contact correctly.

May 25, 2010 | Car Audio & Video

3 Answers

Is there a way to take the subwoofer apart for cleaning?

You need to unscrew the four long screws in the base - to get at them you must first pull out the four plastic 'plugs' that cover them. It's easy, I just did it! There are no wires to worry about as just the clear cover lifts off, so you can dust/clean inside...

Dec 29, 2009 | Harman Kardon SoundSticks II Computer...

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