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Patrick, The other posters on this thread all have good advice. Joe at Regnar?refurbished a set of my DQ-10s a few year ago. He did stellar work and I couldn’t be happier. I’m sure he’s run

Sounds more likely to be an issue with a solder joint. Related to the area of the board flexing. Or the input jacks, fuse holder, etc. Even the related new cap could be bad. Over the years those upper

The tinsels for the midrange dome are mounted on the driver's front plate and accessible without disassembling the driver. You can see them from the front of the speaker, actually, without any undoing

It may also be a good reminder that a marginal solder joint on a PC board may work fine for years, but on a speaker wire, not so much. The mechanical vibrations from the speaker can easily travel down

Greetings Patrick, This wire that you are pulling on producing these results. Are you also stressing the other end? And where does the other end terminate? The mid itself cannot cause the rest of the

I posted recently about a DQ-10 mid range speaker crackle and receive a couple of helpful responses -- thank you!? I think part of my problem was bad solder connections on the main mid range speaker

As w e mentioned, the badges not being attached were a thing for the early to mid-production DQ-10s. Per the company literature in the files section:

and here it is...

For all who are reporting no serial number, see the photo from "dq" today. The earlier units had a small sticker on a tweeter baffle with the serial number on it, which often falls off with age. Newer

I also have a mirror-image pair that I purchased direct from the factory. The speakers themselves do not bear plates with serial numbers, but the owner's manuals came in manila envelopes on which what

The serial numbers on mine are on a small sticker on the tweeter baffle (not the super tweeter). See pic. My pair 4884/4885 are from around 1976 (or earlier, I bought them used) and were not mirror

When I got my pair (1975) the badges were supplied but not affixed. It was up to the owner to apply them (I suppose because some owners didn't want the badges).

Mine are without serial numbers and also don't have badges on the front--doesn't seem that there had been badges that had fallen off. Not mirror imaged.

I have a mirror imaged pair but the serial number is not visible.? Where would it be placed?

I can add that my original pair (which I bought while in high school) were not mirror imaged because i remember the instructions they mailed out to do it yourself. This was in winter of 1975. They had

This is what I recall about the early DQ-10's... The first that I knew about were not mirrored and did not have the Mylar capacitors (the bright yellow ones).? The first I ever saw had the Advent

I was thinking in an earlier mail of what is now in groups.io /g/DahlquistSpeakers/wiki Look in the DQ-10 section, perhaps match the rev info to what selected components your DQ-10s

I cannot find serial?numbers on the back of mine, but they were on my receipt from when I purchased them somewhere around 1979.? 22221/22220 Roy

Meanwhile, does anyone have a pic of the Full Range Electrostatic Model 1 speaker? Paul

Old woofer, SN below 1000 New woofer, SN above 1000 Bulletin No 1: 1973 SN below 200, crossover mod for increased efficiency 3dB SN beginning 4134, another crossover mod No other ideas to help date