Re: DQ-10's with no serial numbers
Actually?qstieee I recall you may be correct - there is a tiny sticker on the back of one of the baffles with a number (serial I suspect). Forgot about that!
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Re: DQ-10's with no serial numbers
I can confirm the CTS history as accurate. Learned it firsthand from someone who worked with Carl M. That said, $850 for a pair with original caps and not mirror imaged?seems a stretch. But it is interesting to see the low serials. The story gets a bit more confusing, because if the CTS versions DO have serials and I have a pair with the Advent?woofer (later production) WITHOUT serials...what gives??
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Re: DQ-10's with no serial numbers
Mine without serial numbers (neither paper inside nor stamped on back terminal circle) are early because no fuse in back. Earlier - with paper serial number tag inside - it is easy for glue on that tag to come off with age and even if unit never opened up tag can get lost inside. I thought when I first joined this group that someone had a document posted showing production changes and approximate dates, and approximate serial number range, so perhaps you could reverse engineer the date from some of those changes matched to what you have. I know a prominent early change was the woofer.
-----Original Message----- From: w e <sky27709@...> To: [email protected]Sent: Wed, Sep 23, 2020 12:29 pm Subject: [DahlquistSpeakers] DQ-10's with no serial numbers Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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Re: DQ-10's with no serial numbers
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There was a set on eBay not long ago sold by a store that said he had researched the subject. His were first 6 months of production based on serial number and the fact the early ones had a woofer made by another cOmpany not advent! If u go back on eBay tovsold dq 10¡¯s you might find his info? I¡¯ll look So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (moany nI sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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Re: DQ-10's with no serial numbers
There was a set on eBay not long ago sold by a store that said he had researched the subject. His were first 6 months of production based on serial number and the fact the early ones had a woofer made by another cOmpany not advent! If u go back on eBay tovsold dq 10¡¯s you might find his info? I¡¯ll look
So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (moany nI sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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Re: DQ-10's with no serial numbers
They could have been non mirror? imaged and latter turned into? mirrow imaged speakers
On Wed, Sep 23, 2020 at 1:07 PM, w e <sky27709@...> wrote: So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (I sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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Re: DQ-10's with no serial numbers
So my question remains....does the lack of serials mean anything? Can anyone confirm (not speculate) that these are very early production run units and that serials started later? I have no clue. I bought both my pairs from other people many years ago (I sold my own personally purchased pair before that, so no frame of reference).
I'm not trying to figure out anything bigger with this question. Merely curious and also slightly shocked Dahlquist would initiate production of their flagship product without using serial numbers.
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Re: DQ-10's with no serial numbers
I have a mirror image pair w/o serial numbers.
Sent from my Verizon, Samsung Galaxy smartphone
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-------- Original message -------- From: richard adelberg <richardadelberg@...> Date: 9/23/20 9:55 AM (GMT-07:00) Subject: Re: [DahlquistSpeakers] DQ-10's with no serial numbers
I have 3 sets and one doesn¡¯t have serial numbers.? Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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Re: DQ-10's with no serial numbers
I have 3 sets and one doesn¡¯t have serial numbers.?
Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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DQ-10's with no serial numbers
Does anybody own a pair without serial numbers? I do and am curious t find out when they may have been produced (I'm assuming at the begninning of production which would suggest I have a very early pair).
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Greeting w e,
Yes I do understand the many years of exposure to the elements. I've got 3 pairs of which I've occasionally only had to replace a tweeter or upper mid on. Knock on wood.... I'd like to have the yellow caps and even the resistors if your tossing them. I've never had a cap fail to date. But one day I would like to blueprint a pair with closely matched oem caps and resistors. I try to keep mine as original as possible. I've tried a few different tweeters here and there over the years. So far IMHO none have really improved on the oem. In fact most have higher efficiency and spatter which requires attention to pad down. Most also beam differently which tends to fold up the famous bloom. Still to date every single time I engage them. I'm stunned at how happy the magical genie remains. Remarkably at the flick of the switch, she pops in and out of her bottle without complaint. Frankly they sound so good in stock form that I don't want to disturb the synergy. But micro matching a pair of xovers for comparison to oem would be interesting. I suspect the result would provide minimal results. But it can't hurt to give it a whirl.
Enjoy, DD
Since I had three hair is a TQ 10 to do six crossovers I didn¡¯t measure all the caps just too many plus you can only do them after they removed from the market the ones that I did test seem to be really good as far capitals the esr. ? Showed some leakage generally only thing I can say is from the sound the one that where are use the real big 80 UF caps have better base response than the ones with the smaller electrolytic wands. The preserve electric ones that I changed I couldn¡¯t hear any difference the other two I didn¡¯t change them because the film Capacitors tested perfect and they take up a lot less space than electrolytic¡¯s. The overall sound with the clarity cabs came down some of the harshness in mid and upper frequencies. It¡¯s a bit smoother there for trumpets and violins.In some if you¡¯re not unhappy with the way they¡¯re performing it might not be worth the $250-$300 cost because the Mills resistors are quite pricey and I think they really contribute to the better sound anybody that wants to call yes send me your email and phone number and we can chat All the old yellow ones (Mexico) and tan resistors, etc. Same as usual. No testing. Assuming since they are going on cose to 40-45 yrs old anything?that has a chance of aging out and going bad has done so...
Just curious so did the oem caps measure leaky or out of range? What color are oem's your replacing??
DD
I redid two sets of Dq10 xo recently using s clarity caps from madisound and some resistors from parts express. If u send me contact I¡¯ll forward parts lists and images with instructions. We just went thructhis couple was ago so should still be on this site? Second page under ¡°Files¡± I¡¯m listed as pbizzigotti
Paul
Upgrading a pair of 10's with original crossovers.
When I look at all the entries in the Database for DQ10 crossover values, they seem all over the road. Is there a definitive source for making sure, before I buy them, that I'm have the correct values? Should we also consider cleaning up this page so there's no misinformation there? My serial numbers are 47627 and 47624 in case they changed over time. I upgraded my xovers on another pair 12 yrs ago but don;t have the documentaion anymore, and I do recall having to piggyback some of them to achieve the correct values (would prefer not to have to do that anymore).
As for brand, I used Solens before. Open to suggestions on other brands, however, I'm in my 60's so spending big $$$ on a caps probably won't even be noticed by my aging ears. My goal is to primarly replace parts that have aged out and no longer up to spec.
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Ed, ?
Thanks for the test information.?
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Since I had three hair is a TQ 10 to do six crossovers I didn¡¯t measure all the caps just too many plus you can only do them after they removed from the market the ones that I did test seem to be really good as far capitals the esr. ? Showed some leakage generally only thing I can say is from the sound the one that where are use the real big 80 UF caps have better base response than the ones with the smaller electrolytic wands. The preserve electric ones that I changed I couldn¡¯t hear any difference the other two I didn¡¯t change them because the film Capacitors tested perfect and they take up a lot less space than electrolytic¡¯s. The overall sound with the clarity cabs came down some of the harshness in mid and upper frequencies. It¡¯s a bit smoother there for trumpets and violins.In some if you¡¯re not unhappy with the way they¡¯re performing it might not be worth the $250-$300 cost because the Mills resistors are quite pricey and I think they really contribute to the better sound anybody that wants to call yes send me your email and phone number and we can chat
All the old yellow ones (Mexico) and tan resistors, etc. Same as usual. No testing. Assuming since they are going on cose to 40-45 yrs old anything?that has a chance of aging out and going bad has done so...
Just curious so did the oem caps measure leaky or out of range? What color are oem's your replacing??
DD
I redid two sets of Dq10 xo recently using s clarity caps from madisound and some resistors from parts express. If u send me contact I¡¯ll forward parts lists and images with instructions. We just went thructhis couple was ago so should still be on this site? Second page under ¡°Files¡± I¡¯m listed as pbizzigotti
Paul
Upgrading a pair of 10's with original crossovers.
When I look at all the entries in the Database for DQ10 crossover values, they seem all over the road. Is there a definitive source for making sure, before I buy them, that I'm have the correct values? Should we also consider cleaning up this page so there's no misinformation there? My serial numbers are 47627 and 47624 in case they changed over time. I upgraded my xovers on another pair 12 yrs ago but don;t have the documentaion anymore, and I do recall having to piggyback some of them to achieve the correct values (would prefer not to have to do that anymore).
As for brand, I used Solens before. Open to suggestions on other brands, however, I'm in my 60's so spending big $$$ on a caps probably won't even be noticed by my aging ears. My goal is to primarly replace parts that have aged out and no longer up to spec.
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All the old yellow ones (Mexico) and tan resistors, etc. Same as usual. No testing. Assuming since they are going on cose to 40-45 yrs old anything?that has a chance of aging out and going bad has done so...
Just curious so did the oem caps measure leaky or out of range? What color are oem's your replacing??
DD
I redid two sets of Dq10 xo recently using s clarity caps from madisound and some resistors from parts express. If u send me contact I¡¯ll forward parts lists and images with instructions. We just went thructhis couple was ago so should still be on this site? Second page under ¡°Files¡± I¡¯m listed as pbizzigotti
Paul
Upgrading a pair of 10's with original crossovers.
When I look at all the entries in the Database for DQ10 crossover values, they seem all over the road. Is there a definitive source for making sure, before I buy them, that I'm have the correct values? Should we also consider cleaning up this page so there's no misinformation there? My serial numbers are 47627 and 47624 in case they changed over time. I upgraded my xovers on another pair 12 yrs ago but don;t have the documentaion anymore, and I do recall having to piggyback some of them to achieve the correct values (would prefer not to have to do that anymore).
As for brand, I used Solens before. Open to suggestions on other brands, however, I'm in my 60's so spending big $$$ on a caps probably won't even be noticed by my aging ears. My goal is to primarly replace parts that have aged out and no longer up to spec.
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Just curious so did the oem caps measure leaky or out of range? What color are oem's your replacing??
DD
I redid two sets of Dq10 xo recently using s clarity caps from madisound and some resistors from parts express. If u send me contact I¡¯ll forward parts lists and images with instructions. We just went thructhis couple was ago so should still be on this site? Second page under ¡°Files¡± I¡¯m listed as pbizzigotti
Paul
Upgrading a pair of 10's with original crossovers.
When I look at all the entries in the Database for DQ10 crossover values, they seem all over the road. Is there a definitive source for making sure, before I buy them, that I'm have the correct values? Should we also consider cleaning up this page so there's no misinformation there? My serial numbers are 47627 and 47624 in case they changed over time. I upgraded my xovers on another pair 12 yrs ago but don;t have the documentaion anymore, and I do recall having to piggyback some of them to achieve the correct values (would prefer not to have to do that anymore).
As for brand, I used Solens before. Open to suggestions on other brands, however, I'm in my 60's so spending big $$$ on a caps probably won't even be noticed by my aging ears. My goal is to primarly replace parts that have aged out and no longer up to spec.
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Robt, ? As you indicate below, eight ohms is a reasonable figure for the DQ10.? ? Nominal values are only a broad characterization of the type of load an amp will see and therefore an indication of the type of amp that ¡°should¡± work well driving the speakers in question.? Phase and impedance minima are the pieces that round out the characterization of speaker parameters.? With respect to the measured DQ-10, impedance minima is ~6 ohms, well within the extremes that would qualify as a nominal 8 ohm speaker. ? Ed ?
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From: [email protected] < [email protected]> On Behalf Of Robt Fleischman Sent: Monday, September 21, 2020 8:29 AM To: [email protected]; [email protected]Subject: Re: [DahlquistSpeakers] DQ-10 Impedance ? All speakers vary in impedance at various frequencies. ?Often the impedance drops to some lower value in the bass region. ?So the stated "nominal" impedance is somewhat of a myth. ?It's "nominal" in the sense of "thats the name of it" or "That's what wee call it." ?True for all dynamic speakers. ?But 8 ohms is a reasonable figure for the DQ10. ? On Monday, September 21, 2020, 10:16:21 AM CDT, Ed Lindsey <sealindsey@...> wrote: Samuel and Andy, ? Attached are the system impedance, measured this morning, on two charts, one is highlighted at 60Hz and the other at 120Hz.? As expected there is one impedance rise at the woofer resonant frequency. ??Impedance minima is outside the reproduced arrange at 20Hz.? Overall, the system is nominally an 8 ohm impedance with phase angle between ¡À30¡ã.? IMHO and experience, aside from the efficiency issues, the DQ-10 is a rather easy load for any 8 ohm rated amplifier. ? Ed ? ? No problem.? You'll be able to see it clearly. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 10:18 PM (GMT-07:00) Subject: Re: [DahlquistSpeakers] DQ-10 Impedance Interesting! If possible Ed make a notation of what it is at 60hz and 120hz. ? I'll measure and post the impedance tomorrow, after I measure it.? Because the woofer is a sealed design there will only one rise at bass resonance. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 6:21 PM (GMT-07:00) Subject: [DahlquistSpeakers] DQ-10 Impedance I need some advice. The DQ-10 has a published nominal impedance of 8 Ohms. I understand this to be an average number.? Somewhere along the line, I¡¯ve picked up that the actual impedance of the DQ-10 varies greatly. Is this correct?? Can you share your knowledge of impedance measurements of a DQ-10 vs frequency?
I¡¯ve attached a stock example from an unknown speaker as an example of what I¡¯m looking for. Please excuse my finger scribbling the word ¡°example¡±.?
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All speakers vary in impedance at various frequencies. ?Often the impedance drops to some lower value in the bass region. ?So the stated "nominal" impedance is somewhat of a myth. ?It's "nominal" in the sense of "thats the name of it" or "That's what wee call it." ?True for all dynamic speakers. ?But 8 ohms is a reasonable figure for the DQ10. ?
On Monday, September 21, 2020, 10:16:21 AM CDT, Ed Lindsey <sealindsey@...> wrote:
Samuel and Andy, ? Attached are the system impedance, measured this morning, on two charts, one is highlighted at 60Hz and the other at 120Hz.? As expected there is one impedance rise at the woofer resonant frequency. ??Impedance minima is outside the reproduced arrange at 20Hz.? Overall, the system is nominally an 8 ohm impedance with phase angle between ¡À30¡ã.? IMHO and experience, aside from the efficiency issues, the DQ-10 is a rather easy load for any 8 ohm rated amplifier. ? Ed ?
From: [email protected] < [email protected]> On Behalf Of Ed Lindsey Sent: Sunday, September 20, 2020 10:38 PM To: [email protected]Subject: Re: [DahlquistSpeakers] DQ-10 Impedance ? No problem.? You'll be able to see it clearly. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 10:18 PM (GMT-07:00) Subject: Re: [DahlquistSpeakers] DQ-10 Impedance Interesting! If possible Ed make a notation of what it is at 60hz and 120hz. ? I'll measure and post the impedance tomorrow, after I measure it.? Because the woofer is a sealed design there will only one rise at bass resonance. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 6:21 PM (GMT-07:00) Subject: [DahlquistSpeakers] DQ-10 Impedance I need some advice. The DQ-10 has a published nominal impedance of 8 Ohms. I understand this to be an average number.? Somewhere along the line, I¡¯ve picked up that the actual impedance of the DQ-10 varies greatly. Is this correct?? Can you share your knowledge of impedance measurements of a DQ-10 vs frequency?
I¡¯ve attached a stock example from an unknown speaker as an example of what I¡¯m looking for. Please excuse my finger scribbling the word ¡°example¡±.?
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Samuel and Andy, ? Attached are the system impedance, measured this morning, on two charts, one is highlighted at 60Hz and the other at 120Hz.? As expected there is one impedance rise at the woofer resonant frequency. ??Impedance minima is outside the reproduced arrange at 20Hz.? Overall, the system is nominally an 8 ohm impedance with phase angle between ¡À30¡ã.? IMHO and experience, aside from the efficiency issues, the DQ-10 is a rather easy load for any 8 ohm rated amplifier. ? Ed ?
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From: [email protected] < [email protected]> On Behalf Of Ed Lindsey Sent: Sunday, September 20, 2020 10:38 PM To: [email protected]Subject: Re: [DahlquistSpeakers] DQ-10 Impedance ? No problem.? You'll be able to see it clearly. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 10:18 PM (GMT-07:00) Subject: Re: [DahlquistSpeakers] DQ-10 Impedance Interesting! If possible Ed make a notation of what it is at 60hz and 120hz. ? I'll measure and post the impedance tomorrow, after I measure it.? Because the woofer is a sealed design there will only one rise at bass resonance. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 9/20/20 6:21 PM (GMT-07:00) Subject: [DahlquistSpeakers] DQ-10 Impedance I need some advice. The DQ-10 has a published nominal impedance of 8 Ohms. I understand this to be an average number.? Somewhere along the line, I¡¯ve picked up that the actual impedance of the DQ-10 varies greatly. Is this correct?? Can you share your knowledge of impedance measurements of a DQ-10 vs frequency?
I¡¯ve attached a stock example from an unknown speaker as an example of what I¡¯m looking for. Please excuse my finger scribbling the word ¡°example¡±.?
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SpongeSound
Ed Lindsey