Clone Unknown?

[fdieck]

Anybody want to guess what speaker I am building a clone of... Pete Basel is disqualified because it will be too easy for him. I heard the speaker first in 1975 or 1976 while a freshman Electrical Engineering student at U of A Fayetteville.

[Pete Basel]

Re: Clone Unknown?

Ha, yes! I heard them in sound rooms only and read the literature.

[donradick]

Re: Clone Unknown?

Based on the shape of the box - Bose 901s ?

[fdieck]

Re: Clone Unknown?

Based on the shape of the box - Bose 901s ?

5 drivers per speaker not 9... The box was a pain to make and I used only a hand held Skill Saw and orbital sander. It took all day to make and seal with epoxy over the non right angle seams. The drawings off the web users group had an error as well.

P.S. My dog is named after Scarlett and my wife has seen GWTW at least a dozen times.

[maynardg]

Re: Clone Unknown?

Looks like a Dahlquist DQ-10 to me. I really like them. Just too expensive for me in the day. Bought the slightly less expensive Magnepan MGII.

[Chris Roemer]

Re: Clone Unknown?

Me too. My buddy had DQ-10s. All drivers staggered ("time-aligned") with an ADVE\T woofer.

[donradick]

Re: Clone Unknown?

AH!
I had to google the Dahlquist DQ-10s - now I see what was under that sexy grill cloth!
I heard them a few times - I had pure lust.

[Pete Basel]

Re: Clone Unknown?

5 drivers per speaker not 9... The box was a pain to make and I used only a hand held Skill Saw and orbital sander. It took all day to make and seal with epoxy over the non right angle seams. The drawings off the web users group had an error as well.

Wait, Skill saw, you say only, you didn't use a table saw or circular saw to do the straight cuts?
That's determination if so, and they came out quite nice.

[ligs]

Re: Clone Unknown?

What drivers you are using? All vintage varieties?

[UnfitNitwit]

Re: Clone Unknown?

I don't know anything aside from a quick web search, but I see where it was a mod to mirror them. Will yours be mirrored or identical?

[Jeff B.]

Re: Clone Unknown?

This was the speaker that got me interested in audio back in 1978.

[fdieck]

Re: Clone Unknown?

Wait, Skill saw, you say only, you didn't use a table saw or circular saw to do the straight cuts?
That's determination if so, and they came out quite nice.

I don't own a table saw. No room for it. I have a nice Bosch Skill type saw and a Dremel Moto scroll saw for small stuff. An orbital sander, 80 grit sand paper, and two part epoxy cover a multitude of sins. Right now I am just going to build one and see if another is worth the effort. I plan on using a CTS alnico 10 inch woofer, a Foster 4 inch alnico lower mid, a Foster 1.5 dome mid. All high Qms with paper voice coil formers and cloth surrounds. SEAS and Motorola piezo with 6 ohm resistor across it for tweeters.

[Pete Basel]

Re: Clone Unknown?

I had to look that up, I always thought Skill saw was like a jig saw, I see it is a hand circular saw.
OK I get it now.
Do you plan for the original crossover?

[fdieck]

Re: Clone Unknown?

I had to look that up, I always thought Skill saw was like a jig saw, I see it is a hand circular saw.
OK I get it now.
Do you plan for the original crossover?

I had to look that up, I always thought Skill saw was like a jig saw, I see it is a hand circular saw.
OK I get it now.
Do you plan for the original crossover?

My bad for using brand name to describe jigsaw.


I love my Dremel motosaw for small baffles.



I am going to stay fairly close to the crossover frequencies but try to shoot for 2nd order LR slope parallel networks. The 1.5 inch dome Foster I am using has a high Fs than the Dahlquist original used. I would like to take the SEAS tweeter lower. I am looking at maybe 400/1400/4K/9K. The original DQ10 crossover is pretty strange (a 8 ohm resistor in parallel the woofer!) and I need some flexibility for the different drivers. I have an Advent woofer and Philips mid woofer but am underwhelmed by them. The original AD8060s used also had paper VC formers. Every vintage version of this driver I have seen has cracked stiff rubber surrounds. I used foam surrounds on mine. Most cloth surround also require some repair also after 30 or 40 years as they often stiffen and become porous. Glue joints fail and require regluing as well. I look for bargins and know I am going to have to repair vintage drivers and write off a good portion of them. I have given up on Bozak woofers and Wharfedale woofers require a lot of work. It is cheaper than fixing up vintage British cars at any rate and less dangerous.

[fdieck]

Re: Clone Unknown?

Most important step. Does the restored DQ10 grill fit snugly so it won't rattle.



looks good... I bought the grills parted out on EBAY. Rust, open glue joints, smoker smell, scratches in the wood end caps, and house paint spatter. I used Parts Express grill cloth which is very open and stretchy. It was a lot of effort to restore these but they look nice from the front.