Audi0
Super Member
Speaker seems trebble heavy at the moment with recessed mids/lows. My guess is the no surrounds are causing the isssue. Is this normal for a speaker with bad surrounds.
Really big speaker ID
- Thread starter Audi0
- Start date
Speaker seems trebble heavy at the moment with recessed mids/lows. My guess is the no surrounds are causing the isssue. Is this normal for a speaker with bad surrounds.
Donkey Karma
Super Member
You should only being playing them at a level high enough to just confirm that each driver is working. Very low. You can damage the voice coils of the drivers playing them at any sort of significant volume.
Yes playing them with bad surrounds will/can effect the sound.
Yes playing them with bad surrounds will/can effect the sound.
slimpikkins
Super Member
You could be right but many commercially made older speakers have writing on them. Some xo's are signed or initialed by the guy who made them and symbols and things written on the boards.
If they are home made the effort that went into the cabinet is amazing. The tweeter array, the time aligned mids and woofer section, nice veneer, look like they have decent heft...Very cool speakers.
swechsler
Frog Whisperer
I have certainly seen handwritten markings to identify a particular lot, or tester, or even a date. But marking each terminal like that, which would be the same on every crossover produced, would be a waste of effort (and these aren't even that old - I'm guessing mid-70s at the earliest). And it doesn't seem high-end enough to be a limited run - they look like higher-end mass market speakers.
Not to mention the compound angles on the front baffle.
Agreed, it seems extremely unlikely to me that these were homebuilt, which is why I suggested that they might be prototypes. I also see hot glue used on the crossover, which I don't think was all that common in the home back then.
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A lot of good speakers in the 70s and 80s got pretty chintzy connection systems. Worst case, get some binding post cups and cut a large hole to fit them.
Audi0
Super Member
Im going to agree with you as well these must of been prototypes. May of never of even made it out of the factory and a employe took them home.
The label looks the same, what does it say? Could have been a later replacement that had a different basket, but otherwise the same. The magnet and cone certainly look similar.
You're thinking wrong.
Audi0
Super Member
Really its fine??? The cones and the dust cap are the same. Spider is slightly different and It appears to have the same tension as the other spiders. Its an OCD sort of thing where I would like matching drivers.
However abit of reaseach found what became of the marsland linear B speakers. They became Mcbride linear B (the mix match driver says mcbride/marsland)
No affli I think this is the modern version of this driver
http://qcomponents.ca/McBride-LINEAR-B-12.0.html
IF the cone and spiders look the same, and the driver came from the successor company, its probably the recommended or closest replacement they could use. In this case, this might be the best compromise you can come up with, short of searching Ebay for a used replacement. Driver frames may "look" different, but if the frame dimensions are the same where it counts - spider circumference, magnetic gap width and height and position, surround landing/mounting, and magnetic strength, it matters not that the frame itself looks or is shaped different.
The newest driver is not likely to have the same parameters, and certainly won't look the same as your old drivers. You would likely have to get some type of woofer tester to check the Thiel/Small parameters, and that's a whole lot more complicated and money intensive just to satisfy your OCD-ness. I would respectfully suggest reining in your OCD tendencies (and I understand them completely) and stick with these woofers for now and get them refoamed and see how they work and sound together.
As I said, you could always search for them on Ebay and CanuckAudiomart, but good luck, I just checked and nothing showed up under marsland, leigh, or linear b.
The newest driver is not likely to have the same parameters, and certainly won't look the same as your old drivers. You would likely have to get some type of woofer tester to check the Thiel/Small parameters, and that's a whole lot more complicated and money intensive just to satisfy your OCD-ness. I would respectfully suggest reining in your OCD tendencies (and I understand them completely) and stick with these woofers for now and get them refoamed and see how they work and sound together.
As I said, you could always search for them on Ebay and CanuckAudiomart, but good luck, I just checked and nothing showed up under marsland, leigh, or linear b.
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soundmotor
super modified
What matters is the different woofer matches the others acoustically and is somewhat less critical in a dual woofer design.
