Some research i have gathered on the DQ10,prior to buying a set and discovering more information,please note that this post may be updated as i find out more.....
Jon DAHLQUIST-Was an aerospace engineer and was obsessed with designing the perfect speaker. Also had previously worked for the Bendix corporation and NASA, specifically on the Lunar Landing Module.
The original company was in Jon Dahlquist's garage in and they latter moved to a larger space. The address of the company was 27 Hanse Ave, Freeport, NY 11520 and latter 601 Old Willets Path,around 3 employees in the beginning and up to 15 in the later years..
Saul MARANTZ-1911-1997 Was a American musician-inventor-Engineer..
Founded MARANTZ in 1948....
Saul owned a major share in Dahlquist and apparently heard the dq10 prototype prior to investing.
Carl Marchisotto- Joined Dahlquist in 1976 and worked their for 15 years.
Was involved in modifications and and went on to found Alon speakers as well as his current company NOLA,much respected high end speakers..
Around 27,000 pairs of DQ10s were made.1973-1989
Early ones had a chicago telephone company C.T.S woofer serial numbers upto 2000 afterwards it was a Advent masonite 10inch, woofer which had a 12 inch spider frame.
Later models 39,000 onwards had the serial numbers on the speaker terminal backplate.
Earlier serial numbers are a small white label positioned in the driver cabinet (my pictures to follow will show the location)
Crossovers had mylar caps at about 22000 and mirror imaging became standard at about 27500.
Dahlqlist early on sent out information on how to mirror image dq10s post production.
Audio review has 110 reviews on and comments on these speakers at 4.8 out of 5..
1972-The Dahlquist speaker corporation was founded in Hauppauge,New York
1972-Dahlquist d10 was exhibited in the New York Audio Show.
1973-Dahlquist d10-Was in production-
1989-Jon Dahlquist-Was severely injured in a car crash and was in a coma for 12 days,Dahlquist was sold 1st May 1990...
After taking a punt on some poor advertising pictures,and a couple of hours drive.
I was pleasantly surprised to find a really tidy pair that had been owned for over 30 years.
Owner had bought els57 and a quad 33 and 303 and returned them and paid £1200 for the dq10s from a hifi shop in Leeds..
Whilst these have been cherished,the previous owner had swapped in a pair of replacment woofers as the foams have disintegrated on the original advent woofers.Luckily the new woofers are dimesionally the same and no holes or additional cutting have been generated , so easily reversed.
Luckily the original woofers have been kept and i metered out the voice coils and all is good,so will look at re-foaming them asap.
I checked all the drivers in the top section and they are all factory and the supertweeters are fine also and checked level using sound meter.
IMG_4708 by Vintage Audio, on Flickr
These are mirrored and the boards have been sprayed black so u dont see the brown wood through the grills.
IMG_4738 - Copy by Vintage Audio, on Flickr
IMG_4735 by Vintage Audio, on Flickr
IMG_4729 - Copy by Vintage Audio, on Flickr
both backs are in the same condition..
url=https://flic.kr/p/2oZJDxz]
[/url]IMG_4681 by Vintage Audio, on Flickr
crossover networks may need new capacitors,onwards with a re foam first,as they already sound nice with the wrong bass drivers in surprisingly good and in a smaller room,will live downstairs in a bigger room with els57, the ns1000 and jr 149 work really well nearfeid,these are going to need some space me thinks...
tIMG_4732 by Vintage Audio, on Flickr
the blingy speaker terminals will get standardised when i put the origional woofers back inIMG_4719 by Vintage Audio, on Flickr
serial numbers are matching,the tweeter fuse is 1 amp but should be 0.8, a lot of people bypass this so perhaps a slightly thicker one is more optimum..
IMG_4724 by Vintage Audio, on Flickr
IMG_4726 by Vintage Audio, on Flickr
IMG_4741 - Copy by Vintage Audio, on Flickr
Side cheeks are all in really nice condition,will lightly sand and add some danish oil,the stands are metal and well made,bit like my els57s perhaps they need to be a bit higher but perhaps at the expense of bass...
Absolutely delighted with these little gems already and will need to re-foam and then look at recapping,they do sound really nice already are around 10 cm shorter in width than els57 and a fair bit heavier and wider in the back..
Have run them up on a quad 306 but think they will need more watts/damping factor to control the bass so may swap in a tag 100x5r or potentially get a quad 405/2 etc...
Jon DAHLQUIST-Was an aerospace engineer and was obsessed with designing the perfect speaker. Also had previously worked for the Bendix corporation and NASA, specifically on the Lunar Landing Module.
The original company was in Jon Dahlquist's garage in and they latter moved to a larger space. The address of the company was 27 Hanse Ave, Freeport, NY 11520 and latter 601 Old Willets Path,around 3 employees in the beginning and up to 15 in the later years..
Saul MARANTZ-1911-1997 Was a American musician-inventor-Engineer..
Founded MARANTZ in 1948....
Saul owned a major share in Dahlquist and apparently heard the dq10 prototype prior to investing.
Carl Marchisotto- Joined Dahlquist in 1976 and worked their for 15 years.
Was involved in modifications and and went on to found Alon speakers as well as his current company NOLA,much respected high end speakers..
Around 27,000 pairs of DQ10s were made.1973-1989
Early ones had a chicago telephone company C.T.S woofer serial numbers upto 2000 afterwards it was a Advent masonite 10inch, woofer which had a 12 inch spider frame.
Later models 39,000 onwards had the serial numbers on the speaker terminal backplate.
Earlier serial numbers are a small white label positioned in the driver cabinet (my pictures to follow will show the location)
Crossovers had mylar caps at about 22000 and mirror imaging became standard at about 27500.
Dahlqlist early on sent out information on how to mirror image dq10s post production.
Audio review has 110 reviews on and comments on these speakers at 4.8 out of 5..
1972-The Dahlquist speaker corporation was founded in Hauppauge,New York
1972-Dahlquist d10 was exhibited in the New York Audio Show.
1973-Dahlquist d10-Was in production-
1989-Jon Dahlquist-Was severely injured in a car crash and was in a coma for 12 days,Dahlquist was sold 1st May 1990...
After taking a punt on some poor advertising pictures,and a couple of hours drive.
I was pleasantly surprised to find a really tidy pair that had been owned for over 30 years.
Owner had bought els57 and a quad 33 and 303 and returned them and paid £1200 for the dq10s from a hifi shop in Leeds..
Whilst these have been cherished,the previous owner had swapped in a pair of replacment woofers as the foams have disintegrated on the original advent woofers.Luckily the new woofers are dimesionally the same and no holes or additional cutting have been generated , so easily reversed.
Luckily the original woofers have been kept and i metered out the voice coils and all is good,so will look at re-foaming them asap.
I checked all the drivers in the top section and they are all factory and the supertweeters are fine also and checked level using sound meter.
IMG_4708 by Vintage Audio, on Flickr
These are mirrored and the boards have been sprayed black so u dont see the brown wood through the grills.
IMG_4738 - Copy by Vintage Audio, on Flickr
IMG_4735 by Vintage Audio, on Flickr
IMG_4729 - Copy by Vintage Audio, on Flickr
both backs are in the same condition..
url=https://flic.kr/p/2oZJDxz]
crossover networks may need new capacitors,onwards with a re foam first,as they already sound nice with the wrong bass drivers in surprisingly good and in a smaller room,will live downstairs in a bigger room with els57, the ns1000 and jr 149 work really well nearfeid,these are going to need some space me thinks...
tIMG_4732 by Vintage Audio, on Flickr
the blingy speaker terminals will get standardised when i put the origional woofers back inIMG_4719 by Vintage Audio, on Flickr
serial numbers are matching,the tweeter fuse is 1 amp but should be 0.8, a lot of people bypass this so perhaps a slightly thicker one is more optimum..
IMG_4724 by Vintage Audio, on Flickr
IMG_4726 by Vintage Audio, on Flickr
IMG_4741 - Copy by Vintage Audio, on Flickr
Side cheeks are all in really nice condition,will lightly sand and add some danish oil,the stands are metal and well made,bit like my els57s perhaps they need to be a bit higher but perhaps at the expense of bass...
Absolutely delighted with these little gems already and will need to re-foam and then look at recapping,they do sound really nice already are around 10 cm shorter in width than els57 and a fair bit heavier and wider in the back..
Have run them up on a quad 306 but think they will need more watts/damping factor to control the bass so may swap in a tag 100x5r or potentially get a quad 405/2 etc...