Re: Not related to Dahlquist, but I respect the group members thoughts
More then happy to take the records, and pay for shipping? for all. Shipping g is actually? cheap because it's considered? media mail and there is a flat fee per parcel.
Yes there is a reason for keeping vinyl, for me it's the physical? part and art cover that I enjoy seeing. But if it's a mobility issue? and? time I can see why one would? get rid of them . Ty
On Sat, Jan 6, 2024 at 1:14 PM, MUDDFISH via groups.io <muddfish@...> wrote: I live in Richardson? tx? near Dallas? On Sat, Jan 6, 2024 at 1:05 PM, katie8664hall <katie8664hall@...> wrote: Where is it located? I'll bet somebody would love to buy it.
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Re: Not related to Dahlquist, but I respect the group members thoughts
I live in Richardson? tx? near Dallas?
On Sat, Jan 6, 2024 at 1:05 PM, katie8664hall <katie8664hall@...> wrote: Where is it located? I'll bet somebody would love to buy it.
Sent from my Verizon, Samsung Galaxy smartphone
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Re: Not related to Dahlquist, but I respect the group members thoughts
Where is it located? I'll bet somebody would love to buy it.
Sent from my Verizon, Samsung Galaxy smartphone
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Re: Not related to Dahlquist, but I respect the group members thoughts
Nice offer! I’ll take it…and find a very good home for it.
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On Jan 6, 2024, at 1:16 PM, SpongeSound <wm.edmiston@...> wrote:
Moving to new home and setting up a whole home audio system (in-ceiling speakers in 9 rooms plus extra 14AWG wiring to two rooms specifically for my two pairs of DQ-10's and subs. I will be wiring in a keypad in every room to control 3-4 electronic devices, a vintage Pioneer turntable (PL -707)?being the lone standout that cannot be controlled (well, except for volume once its queued up and playing)
That said, I got rid of 99% of my records over 20 years ago, so now it remains boxed up, waiting for the day I dust it off and feed it some vinyl. That day, I don't think, will ever come again, as I simply don't see myself ever returning to vinyl no matter how fashionable it becomes again, nor for its "warmer" sound. I just don't feel the urge to seek out and buy records, or a place to store them, or all the manual effort to even play them in light of streaming services and NAS device and other electronics I'll have at hand. Seems like too much work.
Given this reality, is there ANY reason to hang on to this old man, or, does someone out here wish to offer it a good home? Pay shipping only.
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Not related to Dahlquist, but I respect the group members thoughts
Moving to new home and setting up a whole home audio system (in-ceiling speakers in 9 rooms plus extra 14AWG wiring to two rooms specifically for my two pairs of DQ-10's and subs. I will be wiring in a keypad in every room to control 3-4 electronic devices, a vintage Pioneer turntable (PL -707)?being the lone standout that cannot be controlled (well, except for volume once its queued up and playing)
That said, I got rid of 99% of my records over 20 years ago, so now it remains boxed up, waiting for the day I dust it off and feed it some vinyl. That day, I don't think, will ever come again, as I simply don't see myself ever returning to vinyl no matter how fashionable it becomes again, nor for its "warmer" sound. I just don't feel the urge to seek out and buy records, or a place to store them, or all the manual effort to even play them in light of streaming services and NAS device and other electronics I'll have at hand. Seems like too much work.
Given this reality, is there ANY reason to hang on to this old man, or, does someone out here wish to offer it a good home? Pay shipping only.
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If I were in your shoes, I would refoam both woofers at the same time so they perform similarly and have the same lifespan. Foam surrounds should last 10-15 years before deteriorating. It's convenient that Simply Speakers is close to you. I had them refoam a pair of woofers 15 years ago and they do good work. Bill LeGall does fantastic work and he can rebuild almost anything, but he will probably charge more and I don't think it's necessary for a simple refoam job. That's just my 2 cents. I hope you get the speakers up and running soon!?
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I would use the least "worked on" pair that you have since any woofer that's had the cone, spider voice coil parts replaced is likely not correct because replacement parts are close or just look the same.? I look for replacements used that just need foam and leave everything else original. Check glue joints. Check for flatness of the spider. Carl (RIP) measured the all new replacement and the in box Fc is too high due to a stiffer spider. Measurements are posted on the Classic Speaker Pages.
Pete Basel
Thanks guys. Part of me was thinking maybe they'll be fine since I'll be crossing over to a sub around 60hz. But the motor structure looks different. To me the chances of them sounding the same are slim. So yes, I'll send the poorly rebuilt one off since I don't trust myself to do it right - and I don't really have the time. I don't even really have time to rebuild these, but it's something I want to do so I make time here and there for it.
Thanks for the input. The Simply speakers guys are just a couple miles from me, but I have to mail it to them anyway - they're rules for some reason. Or I'll send it to this Miller Sound. I really was hoping I had saved myself time and trouble buying a set of rebuilt ones. Dumb of me to let them sit there for a couple months trusting there were exactly that. Tempting to just get the "new" Advent replacements that Simply speakers sells, but again, I'm doubting they sound the same. After all, when I look at old pictures, the old Advents also had that masonite setup for whatever reason.
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Thanks guys. Part of me was thinking maybe they'll be fine since I'll be crossing over to a sub around 60hz. But the motor structure looks different. To me the chances of them sounding the same are slim. So yes, I'll send the poorly rebuilt one off since I don't trust myself to do it right - and I don't really have the time. I don't even really have time to rebuild these, but it's something I want to do so I make time here and there for it.
Thanks for the input. The Simply speakers guys are just a couple miles from me, but I have to mail it to them anyway - they're rules for some reason. Or I'll send it to this Miller Sound. I really was hoping I had saved myself time and trouble buying a set of rebuilt ones. Dumb of me to let them sit there for a couple months trusting there were exactly that. Tempting to just get the "new" Advent replacements that Simply speakers sells, but again, I'm doubting they sound the same. After all, when I look at old pictures, the old Advents also had that masonite setup for whatever reason.
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I did my first surrounds with a Simply Speakers kit, and it was a breeze.
They work fine!
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On Jan 2, 2024, at 9:02 PM, Bob G via groups.io <bobg717@...> wrote:
? The top one in the second photo looks like an original DQ 10 woofer. It has a Masonite surround so it’s a 10 inch woofer in a 12 inch frame. ?This one should work well. If you’re not familiar with rebuilding speakers, I would send it to a professional and have them check it out. I use Simply Speakers in Florida. They’ve done a great job on 3 DQ 10 woofers that I had them refurb.?
I would not use the second 12 inch woofer in these speakers. It was the original design that Jon Dahlquist had for them, and some of the early speakers have a full 12 inch woofer, but for reasons mentioned in posts on this site, they switched to a 10 inch woofer in a 12 inch frame
Maybe someone here has one of the original advent woofers they’d be interested in selling? You could also search craigslist or other used speaker forums to see if you can find one.
Other folks here can chime in why, but I wouldn’t use the 12 inch woofer in the DQ 10s… It just won’t sound right.? On Jan 2, 2024, at 5:20?PM, creativegeek@... wrote:
?I have this pair of DQ-10's I've been getting ready to restore/rebuild. One of the woofers has had the foam surround redone and they did what looks to me like a terrible job. The other one looks original as far as I can tell.
Online I found what was described as a fully rebuilt pair of DQ-10 woofers so I bought them thinking it would save me time and trouble. Now that I'm getting ready to start working on these things the woofers aren't the same. The frame and magnet are the same - but it's a full 12" woofer. Even though they are a direct fit I'm guessing these are a no-go for the DQ-10?
Here are some photos. Original on top, purchased on bottom:
Thoughts? Do I try them or is this just a complete no-go? I'm guessing they will sound very different than the originals. I looked online and have not been able to find a pair that looks the same - even on old advents.
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The top one in the second photo looks like an original DQ 10 woofer. It has a Masonite surround so it’s a 10 inch woofer in a 12 inch frame. ?This one should work well. If you’re not familiar with rebuilding speakers, I would send it to a professional and have them check it out. I use Simply Speakers in Florida. They’ve done a great job on 3 DQ 10 woofers that I had them refurb.?
I would not use the second 12 inch woofer in these speakers. It was the original design that Jon Dahlquist had for them, and some of the early speakers have a full 12 inch woofer, but for reasons mentioned in posts on this site, they switched to a 10 inch woofer in a 12 inch frame
Maybe someone here has one of the original advent woofers they’d be interested in selling? You could also search craigslist or other used speaker forums to see if you can find one.
Other folks here can chime in why, but I wouldn’t use the 12 inch woofer in the DQ 10s… It just won’t sound right.?
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On Jan 2, 2024, at 5:20?PM, creativegeek@... wrote:
?I have this pair of DQ-10's I've been getting ready to restore/rebuild. One of the woofers has had the foam surround redone and they did what looks to me like a terrible job. The other one looks original as far as I can tell.
Online I found what was described as a fully rebuilt pair of DQ-10 woofers so I bought them thinking it would save me time and trouble. Now that I'm getting ready to start working on these things the woofers aren't the same. The frame and magnet are the same - but it's a full 12" woofer. Even though they are a direct fit I'm guessing these are a no-go for the DQ-10?
Here are some photos. Original on top, purchased on bottom:
Thoughts? Do I try them or is this just a complete no-go? I'm guessing they will sound very different than the originals. I looked online and have not been able to find a pair that looks the same - even on old advents.
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If you think the original speaker can be saved, the best re-foaming place I've used is http://millersound.net
You can e-mail them and see if they can rescue the previous bad job. Bill is very helpful
On Tuesday, January 2, 2024 at 08:16:01 PM EST, drianhodgson <drianhodgson@...> wrote:
Sell them on as they are not correct and they will most certainly voice the dq10 differently.
I have this pair of DQ-10's I've been getting ready to restore/rebuild. One of the woofers has had the foam surround redone and they did what looks to me like a terrible job. The other one looks original as far as I can tell.
Online I found what was described as a fully rebuilt pair of DQ-10 woofers so I bought them thinking it would save me time and trouble. Now that I'm getting ready to start working on these things the woofers aren't the same. The frame and magnet are the same - but it's a full 12" woofer. Even though they are a direct fit I'm guessing these are a no-go for the DQ-10?
Here are some photos. Original on top, purchased on bottom:
Thoughts? Do I try them or is this just a complete no-go? I'm guessing they will sound very different than the originals. I looked online and have not been able to find a pair that looks the same - even on old advents.
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Sell them on as they are not correct and they will most certainly voice the dq10 differently.
I have this pair of DQ-10's I've been getting ready to restore/rebuild. One of the woofers has had the foam surround redone and they did what looks to me like a terrible job. The other one looks original as far as I can tell.
Online I found what was described as a fully rebuilt pair of DQ-10 woofers so I bought them thinking it would save me time and trouble. Now that I'm getting ready to start working on these things the woofers aren't the same. The frame and magnet are the same - but it's a full 12" woofer. Even though they are a direct fit I'm guessing these are a no-go for the DQ-10?
Here are some photos. Original on top, purchased on bottom:
Thoughts? Do I try them or is this just a complete no-go? I'm guessing they will sound very different than the originals. I looked online and have not been able to find a pair that looks the same - even on old advents.
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I have this pair of DQ-10's I've been getting ready to restore/rebuild. One of the woofers has had the foam surround redone and they did what looks to me like a terrible job. The other one looks original as far as I can tell.
Online I found what was described as a fully rebuilt pair of DQ-10 woofers so I bought them thinking it would save me time and trouble. Now that I'm getting ready to start working on these things the woofers aren't the same. The frame and magnet are the same - but it's a full 12" woofer. Even though they are a direct fit I'm guessing these are a no-go for the DQ-10?
Here are some photos. Original on top, purchased on bottom:
Thoughts? Do I try them or is this just a complete no-go? I'm guessing they will sound very different than the originals. I looked online and have not been able to find a pair that looks the same - even on old advents.
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Re: DQ-10 phase issue found and corrected
Did you all have a good Christmas? I hope so. For completeness I am sending you, in addition to the phase graphs that I already sent you a few days ago, also the amplitude graph. The latter is quite in agreement with the amplitude measurements made in the seventies on the connections of the transducers by an Italian magazine called "Audiovisione" (see attachment). You can find the curves relating to these measurements in figure no. 10 on page 58 of the magazine. Both my simulation and the measurements are influenced by the attenuations that the crossover performs (also due to the different sensitivities) on some transducers.
In the same review you can also see that the measurements in the time domain confirmed the correct alignment of the emission centers of the transducers (photos 10 to 13) but not the absence of phase shifts (photos 3 to 5, in which you can see that the square wave is significantly deformed by phase shifts).
Have a good day everyone
Franco
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Re: DQ-10 phase issue found and corrected
Merry Christmas and Happy New Year.? Thanks for the analysis.? May your ESR remain low and your surrounds remain flexible.? Cheers!
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Re: DQ-10 phase issue found and corrected
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Re: DQ-10 phase issue found and corrected
Here are a few pictures to (hopefully) help illustrate the phase issue I encountered with my DQ-10s. The first photo is the rear of the Left Speaker. This is the untouched factory wiring as far as I can tell. Note that the tweeter (upper left side of the photo) has the + and - terminals on the inward side (or middle) of the speaker.?  So when the speakers get mirror imaged, the tweeter on the Right Speaker gets moved from one side of the array to the other, and in doing so, it has to be rotated 180 degrees so that the terminals are in the center of the array. Like this: The Left Speaker Tweeter:  Right Speaker Tweeter after rotating:  But notice how the the + and - terminals are now reversed. Yet on MY right speaker, the connections were exactly the same as shown on the Left Speaker, meaning they were no longer phased the same as each other. To correct the phasing, and make them identical I had to rewire the tweeter and super tweeter.? My Right Speaker... now that it is connected properly. All drivers are now wired according to the crossover schematic  Perhaps the wiring in my right DQ-10 was just an anomaly due to the fact that the serial numbers are not consecutive. And had I not listened to the test CD, I would probably never have known there was an issue. After all, they sounded fine the way they were. I just didn't know what I was missing! Now that the wiring has been fixed on the right speaker, I know that I'm hearing the soundstage as it was intended?to be heard by the recording engineer.
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Re: DQ-10 phase issue found and corrected
The out-of-phase connection of Woofer-mid, midrange and superTW can already be seen on the crossover diagram. However, since the latter is not usual, I wanted to confirm by simulating the crossover with the Simetrix/Simplis Elements software (see simulated diagram).
The phase values calculated with the simulation are visible in the double graph (overall crossover phase at the top, individual speaker phases at the bottom). In the graph below you can see that around 20 Hz there are three curves that are close to the 0 degree value. The red one is the woofer phase, the green one is the woofer-mid phase and the purple one is the midrange phase. As you can see, the green curve (woofer-mid) takes on the value 180° (out of phase) at around 1500 Hz and remains around this value (+/-30°) in the 500-7000 Hz range. The purple curve (midrange) takes on the value 180° (out of phase) at around 2900 Hz and remains around this value (+/-30°) in the 1700-4000 Hz range. The blue curve (superTW) tends to the value 180° ( out of phase) at high frequencies.
Instead, the phase of the woofer (red curve) tends to 0 degrees (in phase) at low frequencies and that of the tweeter (second green curve) tends to 0 degrees (in phase) at high frequencies.
In conclusion, woofer and tweeter are in phase, while woofer-mid, midrange and superTW are out of phase.
Merry Christmas to all!
Franco
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Re: DQ-10 phase issue found and corrected
When it comes to matters like these, it would be great if members could snap photos (maybe before and after a mod, or just to clarify what component they are referring to) and post them. Much easier for some of us to follow along and benefit from the discussion.
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Re: DQ-10 phase issue found and corrected
From what I understand the woofer and tweeter are in phase while the mid-woofer, midrange and supertweeter are out of phase. This unfortunately not only alters the imaging but also the timbre of the instruments. In my DQ-10s (I have two pairs) I connected all the transducers in phase and currently listen to them with an equalization that compensates for the alterations in the frequency response module generated by the modified connections. In my opinion, the result is very satisfactory, not only as regards imaging but also impulsive sounds.
Franco
Il 22/12/2023 22:28 CET wmsimpson125@... ha scritto:
?
?
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...
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SpongeSound
Mark Ingles
drianhodgson
