(an air of desperation) -- anyone here know how to dissect an EV 12TRXB/15TRXB?
Yes, yes -- I know this is the "Lansing heritage forum"... and as the ever-pleased owner of a nice pair of Altec 604Es (and a 'fixer-upper' par of 604Bs and a smattering of other Altec & yes, even JBL components), I do qualify for admission!
but... I have this other, somewhat nonlinear obsession related to Electrovoice components. I (literally) grew up with EV loudspeakers (Myparents had EV Wolverine twincone "fullrange" drivers in home-made cabinets when I was a wee lad). Consequently, I've acquired... a few... EV drivers over the past couple of decades. So, please indulge me and let me know if anyone here can help with an EV coax question.
https://farm3.staticflickr.com/2812/...d7f0c2c0_b.jpg15TRXBfront by Mark Hardy, on Flickr
Does ANYone know how to get access to the tweeter diaphragms on these old EV coaxes (either the older or the newer basket/tweeter design; there're a smattering of 'em down in the basement, as I recall).
I "know" from the internet :-) that one can access the crossover components & the back side of the tweeter by removing the nameplate on the bell cover, and I further "know" that judicious use of a heat gun can enable such... but, beyond that, I can find no info.
A fellow on AK recently reported trying to get at the diaphragm on a 15TRXB, but it seemed that discretion was the better part of valor, and he backed off and decided to add a separate tweeter.
It appears that original EV diaphragms (which used to be sold as a unit with their housing and gaskets) are no longer available, but aftermarket diaphragms are.
Thanks for any and all insight!
I am getting tired of having large paperweights taking up so much space; I am really, really tempted to try replacing a tweeter diaphragm in one (or more!) as a winter project this year.
* Pretty sure the tweeter diaphragm in this one's bad; even gave it a CAT scan for noninvasive diagnosis ;-)
https://farm6.staticflickr.com/5556/...ea6849f0_b.jpgEV15TRXBflipside by Mark Hardy, on Flickr
wow, a veritable tower of Babel of languages :-)
in that DIYAudio thread, that is!
Thanks for sharing it, though -- great photographs.
Doesn't look like a walk in the park, does it?
