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I thought i posted this but i'll try again. Long story short, been lusting after my stepdads dq10s for the last 5 years that he hasn't used them so he gave them to me. Going to do a full refurb, pulled the grilles and surprise- radio shack drivers! Has anyone got a spare pair I can buy and have shipped to Ottawa? Cheers and thanks!

https://www.jameco.com/z/VW24F-10D6-20K-B25-5-Watt-25-ohm-Wirewound-Single-Turn-Linear-Potentiometer-20-_2234855.html 24mm Linear Taper Wirewound Potentiometer 25 Ohm 20% 5W Knurled Slotted Shaft 15mm L View larger image Jameco Part no.: 2234855 Manufacturer: Jameco ValuePro Manufacturer p/n: 5W-VW24F-10D6-20K-B25 HTS code: 8533400080

Hi all. I have two sets of DQ-10's. For years I used them for stereo only with the MX-1 passive crossover and the dahlquist passive sub. Sounded great. Of the two pairs I own, I upgraded of the pairs with new crossovers from Regnar (had Regnar rebuild my old ones and mail them back to me) and the other pair is stock. Both pairs in factory new condition as they have always been in my clean home with minimal movement. Had one pair woofer re-foamed when it started to sound crackly -- probably 20 years ago now. I love them now in my 5.1 theater setup -- using just three of them for my L, R, and Center speakers in my theater (along with a high end JVC projector with 135" stewart screen) using just a high end Denon AVR x6700H powering them paired with an HSU powered sub and Alon II rears (huge quality overkill on the rears, I know). Anyway, here is my issue. Lately, only during dialog and only VERY faintly, I hear a sizzle when men's voices, from TV shows, coming from I believe the center channel. This is one of the speakers that has everything as from the factory. The sizzle during speaking is so faint that only I can hear it, but my wife does not hear it. Anyway, now that I am attuned to it and am listening for it, it is driving me nuts. Give this is a virgin speaker, is it the crossover, a speaker, a woofer needing re-foaming, or something else? Before I start ripping things apart, would love some direction from the group. Thanks

First - This will be my last post to the group. Yahoo seems determined to get in on the Facebook type market, and frankly, I'm just not sociable enough for that. I don't twitter, I don't Facebook, I don't mySpace, etc. I've decided I don't Yahoo either. I intend to delete this Yahoo account once this is posted, so will not see any responses or questions. Sorry if that seems abrupt, but once I make a decision, it instantly gets applied. This is my attempt at a parting gift, not a slap in the face, hopefully... The schematic - The revised schematic came from a weekend of tests done by a very well regarded professional in the field, and he has the equipment to do it too. He is under contract so he can't publish this. He did me a favor. You'll note that this is similar to other versions, but the driver phasing is critical, and all of the versions we've seen seem to have been redrawn, redrawn, and redrawn, with errors at each revision.. You'll note I just re worked an earlier crossover, but removed the confusing wire colors, and put in the revised polarities. On the wire colors, well... Dahlquist had some one color scheme, others another color scheme, and some were all white wires! Get an ohm meter and trace polarities to the next component on the crossover. It's the only way to KNOW you have it per the schematic. In brief, the DQ10 crossover is 2 series crossovers, in parallel. A third leg added for the super tweeter. The low end of each driver is electrically a second order rolloff. The high end is electrically a first order rolloff. So, it an asymmetrical crossover which is common enough. The phasing on most symmetrical 12 db/octave, aka second order filters is usually reverse phased at the crossover points. From what I've read, it shouldn't matter whether the crossover is series or parallel. That's not necessarily true though as series first order can also be reconfigured to quasi-second order which has NO phase shift, although still doesn't attenuate very well. Then a second component could be tweaked in to help protect a delicate mid or tweeter...? I know Paul W. Klipsch did things like that! Reversing 1 driver puts the drivers IN PHASE at the crossover points, because each section is 90 degree's shifted, so 90 degree's + 90 degree's = 180 degree's, or completely reversed. This will usually cause a null at the crossover frequency, unless the driver phasing is reversed on 1 of the drivers, usually the tweeter. DQ-10's are not symmetrical second order, so the phase shift here is only 135 degree's(ignoring the actual phase shift of the drivers themselves...) These are not "book" crossovers at all, but rather crossovers designed from IN FRONT of the speaker, testing each element, and each change. This is 100% counter to the way systems are designed today. Today, it's all modeled on computers, then revised and optimized by computers. Then, maybe if if it's a really expensive system, some one actually sits in front of it and listens. Maybe he'll even tweak it a little. Jon Dahlquist was brilliant! What jk determined is that from a distance of 40", and with the microphone mounted and aimed towards the middle of the top array, the drivers were all IN Phase at the crossover frequency's, and for a good range beyond with the phasing per the revised schematic.. The frequency response was also much smoother, both on and off axis. It seemed to him, this had to be the ORIGINAL layout, unless the idea was to have a more diffuse sound-field, and the speakers were required to be listened to well off axis. We tried it that way, and it made for a much BIGGER image. However, it seems unlikely that was the intent of the ORIGINAL designer. Recall, this was touted as a PHASED ARRAY, with the drivers acoustic centers all critically aligned and focused. We were both flabbergasted when we heard them! For me, it was a trip down memory lane, back to the early 70's. This was the sound I remembered and fell in love with. Absolute precision! I'd forgotten they could sound that good. The detailing, even in the mid range was equal to, or superior to man

Hello everyone & I’m wondering if there’s anyone within the group that has bi-amped their DQ10’s and if so, do you think it was worthwhile? If improved, how so? And, are you using an active and/or a passive crossover and what amp combination? I’ve been toying with the idea, but, am a little Leary of the added complexity, wondering if I might not be doing more harm than good? Any and all info appreciated. Thanks, John

Greeting, I'm currently repairing a LP1. And while flipping thru my notes noticed, that back in the day the designer's decided that only the Raytheon 4558 was sonically worthy. Unfortunately it seems I don't have any Raytheon's but do have a bag of Motorola MC4558CP's. Which I'll have to research possibility employing. So my questions are do any group members happen to have any Raytheon's stashed? And providing they are unobtainable, any ideas on what would be the closest current production replacement would be greatly appreciated? Many thanks in advance, DD

I have two pairs and will sell either pair. Both are Walnut and black. one pair is all original unmodified and in unblemished condition. numbers 26995,26996. Woofer surrounds have been replaced. The other pair numbers 4340,4341 have been professionally modified with new wiring, posts, and crossover components. Both pairs sound identically superb to me, are in "like new" condition, and I will part with either pair and keep the other. Unmodified pair for sale for $450. Modified pair for sale for $600. I also have an original pair of the 3 column taller DQ10 stands (about 7 out of 10 condition) for sale with either pair for an additional $125. Available in Nashville Tn. for pickup. If to be shipped arrangements and payment must be made by buyer. I also have an extra DQ10 (large advent) woofer for $80 plus $15 shipping Respond to jrs85@... if interested in any of these.

Anybody in the group have an LP one they’re not using and I need one for Friend set up online Tim IAMX one for now but as you all know they’ll be one really rocks so if anybody has one for sale please let me know thanks

Hey all, I found something fun that I thought the group might find interesting. Dahlquist DQ-10s have been used as mastering monitor speakers for at least one album. You can listen to it and find the mention in the liner notes here: https://archive.org/details/cd_hongyingdonbiao_huanghongying-donbiao - John