Hi guys!
My friend found this beauty in the trash.
photo-2021-04-16-21-54-32 — ImgBB
It looks ok, but the woofer damaged. I guess I also need to replace capacitors due to the past time. I checked the dimensions and the volume is about 51 liters. I'm gonna buy some 6'' 8 Ohm woofers and replace the old ones. I'm not sure which exactly woofer I need to use. But I guess I can use some which people usually put to 50 liters cabinets with phase investors.
What do you guys think? Should I spend around 100 (200??) Euro to repair these vintage speakers?
PS I believe that we can give a second life to our old hi-fi friends.
250 — ImgBB
My friend found this beauty in the trash.
photo-2021-04-16-21-54-32 — ImgBB
It looks ok, but the woofer damaged. I guess I also need to replace capacitors due to the past time. I checked the dimensions and the volume is about 51 liters. I'm gonna buy some 6'' 8 Ohm woofers and replace the old ones. I'm not sure which exactly woofer I need to use. But I guess I can use some which people usually put to 50 liters cabinets with phase investors.
What do you guys think? Should I spend around 100 (200??) Euro to repair these vintage speakers?
PS I believe that we can give a second life to our old hi-fi friends.
250 — ImgBB
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Hi Vavilen,
I can't open those images. 🙁
I'm not a fan of Bose multi-cheap driver speakers. The 501's were the only ones I felt deserved to be called a speaker.
What I see on the internet looks like a conventional speaker box with two mid/high drivers. They would be worth refoaming the woofers if they needed it, I'm not sure what 6" speakers you are talking about unless those are the mid drivers I see. Do they have tweeters (hard to tell from the pictures I am seeing).
-Chris
I can't open those images. 🙁
I'm not a fan of Bose multi-cheap driver speakers. The 501's were the only ones I felt deserved to be called a speaker.
What I see on the internet looks like a conventional speaker box with two mid/high drivers. They would be worth refoaming the woofers if they needed it, I'm not sure what 6" speakers you are talking about unless those are the mid drivers I see. Do they have tweeters (hard to tell from the pictures I am seeing).
-Chris
I modified the photos. Sorry, the woofer hole diameter is 235 mm.
The middle driver hole is 82 mm.
And yes, it has a tweeter.
Do you really think I should throw it away? 🙁
The middle driver hole is 82 mm.
And yes, it has a tweeter.
Do you really think I should throw it away? 🙁
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Oh, no!
I seems that it has two mid/wide-range speakers, but not any tweeters :-(
photo-2021-04-16-22-49-12 — ImgBB
I seems that it has two mid/wide-range speakers, but not any tweeters :-(
photo-2021-04-16-22-49-12 — ImgBB
Yes, those are tweeters. If I were you I'd measure the center to center on the woofer mounting holes and find a nice inexpensive replacement woofer and just hook them up. Don't be all worried about T/S parameters but make sure the woofer has a nice small magnet like that one and be prepared to add a little more damping material inside the box.
First things first though, make sure that all 4 tweeters are working. If they are not, move on to another project or be prepared to spend more than you ought to, to bring these back to life.
First things first though, make sure that all 4 tweeters are working. If they are not, move on to another project or be prepared to spend more than you ought to, to bring these back to life.
Test the tweeters with that mylar cap in series with them. The cap may be the only thing worth saving.
Test all four mid/tweeters and two woofers with digital multimeter, directly at the driver terminals - they should show several ohms resistance. If they are fine, just refoam the woofers with new surrounds.
The Studiocraft line was Bose's low cost speaker line in the late 1970s and early 1980s. They were pretty mediocre by the standards of the day, about the equivalent of a large chain house brand.
Thanks for your responses!
Do you guys think that it's better to buy 500-800 Euro bookshelf speakers kit and build it myself? This was my original plan, but then these speakers appeared.
It seems that these speakers are very basic.
Do you guys think that it's better to buy 500-800 Euro bookshelf speakers kit and build it myself? This was my original plan, but then these speakers appeared.
It seems that these speakers are very basic.
To mess around with such a reject is best suited to DIYers looking for a chance to learn how to repair decayed surrounds and design a new x/o circuit, and probably seal off the other tweeter opening. Then there is work to make the enclosure more appealing.
Just guessing, but those two "tweeters" with their "acoustic lenses" must create some weird phasing effect that probably sounded cool / different / strangely convincing in the salesroom, in stereo.
Funny that the datasheet you linked too doesn't even claim they fulfill the Hi-Fi-norm, just covering the "entire audible range". Also, having low-carbon steel for drivers seems to be a selling point I must have missed so far.
Irony aside, these could be fun things when fixed cheaply. The German retailer Pollin has very cheap woofers that might fit the bill. Probably best to close off the vents, the tuning will likely be totally off.
Edit - This 'project' and a serious new bookshelf kit are two completely different things. Spend 40 euros including shipping on cheapo drivers to rescue the Boses, to save the serious bookshelfs you planned on building from being shredded at your next party, whenever that is possible again.
Funny that the datasheet you linked too doesn't even claim they fulfill the Hi-Fi-norm, just covering the "entire audible range". Also, having low-carbon steel for drivers seems to be a selling point I must have missed so far.
Irony aside, these could be fun things when fixed cheaply. The German retailer Pollin has very cheap woofers that might fit the bill. Probably best to close off the vents, the tuning will likely be totally off.
Edit - This 'project' and a serious new bookshelf kit are two completely different things. Spend 40 euros including shipping on cheapo drivers to rescue the Boses, to save the serious bookshelfs you planned on building from being shredded at your next party, whenever that is possible again.
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