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Multi-Way Conventional loudspeakers with crossovers

4 way studio cabinets
4 way studio cabinets
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Old 4th May 2019, 05:01 PM   #1
iSykadelix is offline iSykadelix  United States
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Default 4 way studio cabinets

I purchased a pair of studio speakers off craigslist of which each cabinet contains two pro studio 15" woofers [4ohms], 1 mid [1 is 8ohm 100w no brand label and 2nd mid all I know is 8ohms], and 1 compression tweeter horn [1 pyramid 1.5k ~ 15kHz freq. 100 rms 4~8 ohms and the 2nd tweeter I have no clue and has no brand label]
I wanted a prebuilt tower setup but life is never that easy. I removed and inspected each driver which all work but with the tweeters being different from one another and same with the mid range drivers, a lack of crossover in one of the cabinets and a miswired crossover in the 2nd cabinet, the frequency output is noticeably different between the 2 different tweeters and 2 different mids.
Just a mess in my opinion.
Well I definitely want to use the 15" woofers as well as keeping the cabinets. My goal is to figure out the best drivers to use and whether I should use mid range horn along with the horn tweeter? Or to use a bullet tweeter [own a pair already] with a mid horn? Or just keep the original set up using a new pair of matching horn tweeters with new matching pair of cone mids?
Either way the mids and tweeters are being replaced.

The goal for this set up is loud but high quality beautiful sound reproduction.
This will be my first major speaker project of which I'm willing to be patient with as I would like to have these done right the first time to avoid swapping out drivers.
I'm sure it can't be 100% avoided but I would like to do my best in minimizing the need to. [Slight perfectionist.]
Normally I would prefer to just buy and experiment with a bunch of different drivers to learn more of exactly what I want but my funds can only allow so much right now. So now I'm here requesting other's opinions and experiences, issues, solutions pretty much anything possible that may be of help.
I do appreciate the time to all of those who read this.
Here are some pics of what I'm dealing with.

Pics of the 2 horns I replaced the top one with the bottom one.

Well it's not uploading for some reason. I'll try again after posting this.
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Old 5th May 2019, 03:47 PM   #2
iSykadelix is offline iSykadelix  United States
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Old 5th May 2019, 06:39 PM   #3
Galu is offline Galu  Scotland
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It looks to me like the original configuration was midrange horn at top with high frequency bullet horn underneath.
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Old 17th May 2019, 05:09 AM   #4
iSykadelix is offline iSykadelix  United States
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Quote:
Originally Posted by Galu View Post
It looks to me like the original configuration was midrange horn at top with high frequency bullet horn underneath.
Thank you! That helps a lot in making my decision.
Do you have any recommendations when choosing drivers?
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Old 17th May 2019, 06:56 PM   #5
BHTX is offline BHTX  United States
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I remember seeing these in the late 90's. I came across them at least twice in my hometown, which became predominantly Spanish. Once at a Cash America pawn shop, and once at a Spanish flea market. The woofers had "Pro Studio" printed on the dust caps. The system was being powered by a Sherwood receiver on both occasions. At the flea market, there were also little matching surround speakers. Just thought I'd share that memory..

Last edited by BHTX; 17th May 2019 at 07:15 PM.
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Old 17th May 2019, 07:51 PM   #6
BHTX is offline BHTX  United States
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Photos courtesy of Google Images.

The name "Welton" keeps appearing as the brand.

There appears to be slightly differing models: some with a slightly wider horn, different grilles, laminate, black carpet, etc. Many of them had only one woofer with a mid and smaller piezo horn.

The system I saw at the flea market was like the first pic with the flashy red wood laminate, surround speakers, center speaker, and what may have been a subwoofer or maybe just a matching stand for the Sherwood rack of components, which included a receiver, CD changer (5 disk?), and dual cassette deck.

A Google Image search for 'Welton Pro Studio speakers' reveals several other gimmicky flea market grade audio endeavors.
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Old 17th May 2019, 09:21 PM   #7
ICG is offline ICG  Germany
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Location: I had a Déjà Moo - I've seen that BS before!
Quote:
Originally Posted by iSykadelix View Post
Click the image to open in full size.
I got both of these horns and I can tell they are AWFUL! Yes, if high spl and low cost are priority, you can use these. If SQ, high spl or real PA use is priority though, throw them as far you can.
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I had a Déjà Moo - I've seen that BS before!
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Old 17th May 2019, 09:59 PM   #8
Galu is offline Galu  Scotland
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Quote:
Originally Posted by iSykadelix View Post
The goal for this set up is loud but high quality beautiful sound reproduction.
From the evidence presented above, if you wish to achieve your goal you would need drivers of a higher quality than the ones originally fitted in these cabinets.

Those 15" woofers may look exciting, but will not be of high quality. For a "first major speaker project", I recommend you look elsewhere.
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Old 17th May 2019, 10:29 PM   #9
BHTX is offline BHTX  United States
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I'm also concerned about the crossover. With prospective projects like this, it may actually be easier to start entirely from scratch. If the necessary woodworking for the cabinets would hold you back, find someone who can help you.

On the other hand, if you're still determined, perhaps posting pics of the crossover tidbits would be in order. However, I'd suggest scrapping all of the crossover components and starting from scratch. I'm kind of surprised there's more than a single capacitor on the drivers.

The midrange in those Pro Studio speakers is probably a sealed back unit. So unless you're satisfied with your options being limited to the likes of a Pyle or Goldwood sealed back mid, you're better off scrapping the cabs.

I was just reminded of this 2011 project from Parts-Express:
Speaker Project - The Blue Wonders -- 8/22/2011
Price could be scaled down, of course.

Last edited by BHTX; 17th May 2019 at 10:43 PM.
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