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PostPosted: 28 Apr 2017, 07:16 

Joined: 28 Apr 2017, 06:02
Posts: 1
Anyone know of a resonant transmission-line type construction project for these speakers? Got 'em from my daddy who was an auction house junkie. They were in unopened factory boxes and I'd like to use them in a couple of T- L boxes. (I'm an amateur radio operator so quarter-wavelength anythings are fascinating fare). I'm told they were exceptionally good speakers for the time. I recently snagged a batch of TL1875 pwr. amp chips on Amazon so I'm chomping on the bit to fire up the solder iron and Skill-saw. Any help with speaker plans would be much appreciated.
Bill S. KF7OPR

PostPosted: 22 May 2017, 20:08 

Joined: 26 Oct 2012, 21:00
Posts: 203
Location: ontario canada
the 755e would be more suited to an open baffle build or a large IB as it was originally a ceiling sound distribution speaker.
transmission line designs should not resonate there intent is to cancel the FS of the driver.
have you done a break in and measured resonance of your "mint in box" drivers?
i would be more inclined to try them in a backloaded horn and add a tweeter.

i'd also take a look at the Lansing Heritage Forum i recall a build recently featuring this driver.

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