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Help Identify Q30 Speakers

trobertson72

New Member
I picked up some vintage bookshelf speakers yesterday. I haven't been able to find any information on the web about them. They are your standard walnut veneer speakers, 60's-70's era. The only identifying marks on them are a badge on the grills with "Q30" on it. The grills will not come off easily.
Any help would be greatly appreciated.
 

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I have more pictures!! Turns out the grills come off quite easily. Velcro and everything. Hmm.
But look what's it's been hiding behind that grill.
Some other cool wood, like it was meant to roll with no grill.
If anyone has ever seen these speakers, and knows something about them, please let me know.
 

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Unfortunately the drivers don't look all that impressive. Woofer has a very small voice coil and the tweeters appear way too large to be decent quality.

But looks can sometimes be deceiving. How do they sound?
 
Thanks for the response. They actually sound pretty good, considering all their inherent weaknesses. I'm using a subwoofer, which helps a lot. The speakers put out solid mid-range; they go very loud without distorting, at least. I did notice an absence of the higher trebles, and soon discovered there is no sound coming from either tweeter. There are two inputs for the speakers, however. An old school screw-post type deal, and an RCA. I tried both, and both produced sound from the woofers, but never the tweeters.

Your mentioning of the drivers begged the question: Yeah, what kind of drivers are in there? Since I was gonna have to get in there for the tweeters sooner or later anyways, I took off one of the woofers and took some pictures. Both of the different drivers are of the brand, Dynamic Speaker Corporation. Googled the brand and went straight to the pictures. Found this in another thread, about some unrelated brand of speaker:


(From – “Ampex Mark IV Speakers” in Dollars and Sense.)

Dynamic Speaker Corporation This California corporation manufactured raw
speaker units. Wald Sound owned 51 percent of this company's stock until February 28, 1974, when Wald acquired the remaining 49 percent. The company was not profitable and discontinued its operations in 1975.



Not profitable is probably good, as rather than indicate poor quality, it merely implies bad business people, and would help explain why a company that made good speakers would remain obscure.



I’ll keep digging for sure. I like the vintage walnut veneer either way, and since the tweeters are probably blown, I may make this my first speaker build project. Well, legit project, that is. I’m sure I’ve tried many times in my younger years to put some speakers together in some haphazard way, but I’d like to make something awesome this time.
 

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It could be that the tweeters are blown, or it could be that the crossover capacitors are shot. After 40 years that's a decent bet. Get in there with a multimeter and see what you can figure out.
 
Hi, i´m from Argentina, i´ve found this ones from the same manufacturer. How did they work for you? Did you finally restore them?
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Hi Ari3D. When you say they are from the same manufacturer, what brand are you referring to, Q30 or Dynamic Speaker Corporation? I must admit, yours are much larger than mine are. How do they sound? I never got mine restored, as other more interesting projects got in the way. But now that you've reminded me, I think I get them down out of the garage and revisit finding some suitable replacement tweeters.
What the story with the speakers you have?
 
I was curious whether your tweeters were actually blown or whether there was a crossover in there with a bad cap.

These look rather typical of store or house brand speakers of the 70s. Often the cabinets were pretty nice and I've seen front face veneer before on various speakers. It would have been a selling point compared to, for example, Advents and KLHs of the era which were rather ugly without the grilles on.
 
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