I bought a pair of dm220 bowers and Wilkins speakers from this man on kijiji. I've had them for about 3 months now and I would say it's the best purchase I've ever made in audio gear. So I had a party at my house a few weeks ago, and I got a little careless, I raised the volume high enough I had blown the fuse of each speaker. Upon replacing them, the right speaker did not work right away.I get the right speaker to work temperaly by slightly tilting it and letting fall back to the floor. (it's a tall speaker) That bang seems to knock something inside, I hear a spark noise from the speaker, and it works perfectly, but not for ever. I have to do this every few days to keep it going.Last night, that wouldn't fix it. So i decided to turn the volume pretty loud, hear that spark noise, and it started working! Even after reducing the volume. I see this is a specific problem, but I would very much appreciate some advice on a proper fix for this speaker.
It sounds to me as if your fuse did not blow fast enough and you did some damage to your speakers.
That fuse blew to protect your amplifier. Normally it will blow when the speaker circuit opens and that is what I would be troubleshooting if I was working the problem. In my opinion you have an intermittently loose connection; probably either where the wire enters the speaker enclosure or inside the enclosure. It's a remote possibility that the speaker wire is damaged but that is very remote. A thorough inspection of the speaker wire, from the point where it begins to move when you bump the speaker right up to the enclosure. If that exposes nothing the problem is in the enclosure itself. High quality enclosures are a specific size, and ported with carefully designed holes. Most of the time the only way to access the guts is to remove the speaker itself. Do so carefully and inspect every connection. Pay special attention to any small/fine wire connections especially the ones to the voice coil and cone. Now here's the secret, if you don't understand exactly what I am saying in the above you probably aren't qualified to open the cabinet and you would be well served to seek out someone who is. It isn't difficult to damage things in a speaker housing, frequently without even knowing that you did cause more trouble. Good Luck GIMP EDIT: Have you swapped the channels, i.e. run the left speaker off the right channel and vice verse?? Anytime you have something broke and an identical something working that working unit will become your best friend. Keep talking to me, I'll keep listening and adding EDITs. Cheers
You obviously have a loose connection--speaker drivers very rarely have an intermittent problem. I would check the fuse-holder. Either the spring at one end is not under enough pressure when the fuse is in, or perhaps you replaced the original fuse with one slightly shorter. Unfortunately it has been many years since I have seen a DM220, and I don't remember the type of fuse or fuse-holder that it has. I would swap fuses with the other speaker, and see if the problem moves: I HAVE seen defective, intermittent fuses!
