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A few months ago I feared that one of the woofers on my main pair of DQ-10s (the pair that has the original woofers with the masonite ring) had broken beyond repair. In particular, I feared that the voice coil had burned out, since the tester measured infinite resistance between the two woofer connectors. After various tests, however, I managed to understand that the problem was in the soldering on the cone where the voice coil wire comes out (see photo). After re-soldering very carefully to avoid burning the cone, the woofer started working normally again. I hope this message can be useful to someone who has the same problem. Trying to repair the original woofer, in fact, is also important because, as I reported in another post of mine sent today, the full metal basket Advent woofer has the cone set back compared to that of the original woofer and it would therefore be necessary to mount it forward with respect to the panel. Franco

I bought a pair of DQ-10s at a local thrift shop about a year ago, and had been thoroughly enjoying them for at least a month when I discovered that one of them had a phase issue. Here's what happened... I was reading another audio forum and came upon the subject of using test records/CDs to evaluate stereo systems and or speakers. Out of curiosity, I found The Best of Chesky Classics & Jazz Audiophile Test Disc Volume 3 on Tidal and gave it a listen. To my surprise, Track 28 - Natural Stereo Imaging, and Track 29 - Artificial Stereo Imaging indicated there was a problem with my right speaker. The imaging would not extend past the right edge of the speaker. But with the left speaker, the imaging extended well past the left edge. In other words, the soundstage from my DQ-10s was being cut off drastically on the right side. After several hours of trying to figure out what the heck was going on, I discovered that the tweeter and super tweeter on the right speaker were wired out of phase. It was an easy fix, and now my DQ-10s sound the way they should... a soundstage that extends nearly 90 degrees to the left and to the right. Funny thing is, I was under the impression that my speakers were factory mirror imaged (SN 47247 and 47295), and the wiring appeared to be untouched. Anyway, I was clueless that there was a problem until I listened to that test CD. Disclaimer: I have no affiliation with Chesky recordings...

Hi group. I recently moved into a smaller house and no longer have the right amount of room for my pair of DQ-10 speakers. It pains me, but I will probably have to sell them, and I have no idea what the value is or what they might be worth to someone. I LOVE them. They are an original set (original crossovers and speakers), serial numbers 22046 and 22048. I replaced the foam surrounds for the woofer around 20 years ago, they definitely need to be redone and that's the only issue that I know of. I also have the stands. If I was going to put them up for sale, what do you think I should be asking for them? Thanks for your input.

DQM-9C Tweeters So I rescued a sadly abused pair of DQM-9C with dented/torn dust covers, no grill covers, and gouged cabinets. I had them in my workshop for a little while, but they just sounded awful, no top end from either tweeter (yea I checked the fuses). I pulled and desoldered them and both are dead measuring infinite resistance. So I did a little digging and these Magnet tweeters are different than my DQM-9’s MHTL-24G tweeter, as these are 8 ohm not 6.8 ohm. I think they may be a variant of the MHTL-26 series but it’s moot as there are no replacement tweeters out there, and no, Regnar lists none for any DQM Series. So, I have a few choices. adapt another 8 ohm/90 dB tweeter Use a cheap Chinese silk 1” diaphragm kit and try to repair them Find some working tweeters cheap Toss em and start over. Anyone have any experience with tweeter alternatives and/or tweeter repair kits? Or other ideas? These speakers are pretty rough and not worthy of living room habitation, but I love my 9s and want a pair out in the workshop. I currently have a pair of DQM-5s out there now, wonderful speakers, but they just don’t push enough air for that big of a space.

Just picked up a pair of dq-20i's and of course one tweeter is bad. I can't find much info on the d2008 8517. Anyone have any experience with these? Also, is there a preferred supplier for foam for the woofers?

I am the original owner DQ 10s purchased through audio club while stationed in Europe in 1976-77. No serial numbers anywhere. All original; nothing replaced so far. Has the AGC 3 fuse but does not have the tweeter fuse where one would normally find it next to the tweeter in a fuse holder. Instead, it has what looks to be an inline fuse (see pic)? The speakers came factory mirrored with a paper on which was right and left but no right or left marking on the speakers. I can only guess maybe these were an earlier pair as factory mirroring started given lack of serial number or the usual tweeter fuse location. My plan is to have the crossovers tested; local vintage audio repair service believes it likely only the blue caps need replacing. Speakers seem fine; woofer has been re-foamed. My question would be whether to have a fuse/fuse holder mounted next to the tweeter or leave well enough alone.