EV electro voice

[Andysu]

short circuit 1986

 

[mhardy6647]

I have a very soft spot in my head heart for EV drivers and, to a slightly lesser extent, loudspeakers, having literally grown up with them.









I have far, far too many EV components "in stock" -- given that I've matured into more of an Altec fanboy for actual listening.

 

[egellings]

I have a very soft spot in my head heart for EV drivers and, to a slightly lesser extent, loudspeakers, having literally grown up with them.









I have far, far too many EV components "in stock" -- given that I've matured into more of an Altec fanboy for actual listening.

Looks like an HF-206 horn tweeter in there.

 

[Valvetubehead]

 

[mhardy6647]

Looks like an HF-206 horn tweeter in there.

If you're referring to the Esquire (?) It's an EV T35B
The T35B is also the tweeter in the 12TRXB and 15TRXB coaxials, FWIW.

source: http://www.cieri.net/Documenti/Istruzioni/Electrovoice - Tweeter T35, T35B, T350.pdf

 

[egellings]

Looks like an HF-206 horn tweeter in there.

I got that tweeter's identity confused with a University model HF-206; they look similar.

 

[fpitas]

I got that tweeter's identity confused with a University model HF-206; they look similar.

I believe there was a connection between University and EV at one point.

 

[mhardy6647]

I believe there was a connection between University and EV at one point.

Later, yes. Not in the early days of the T35 family.
The "Cobraflex" horn, e.g., started life as a University product, but ended up with EV branding.
Heck, I think they are still selling the Cobraflex!

The HF-206 was a University horn/driver. I drew a blank when @egellings invoked it, because I was thinking "EV".

Das Ding an sich Note the University Cobraflex, too.
source: https://www.alliedcatalogs.com/flipbook/1960_allied_radio_catalog.html

The EV T-35, T-35B, T-350, and TW-35 tweeters used a diffraction horn that EV was quite proud of back in the day.
Pretty sure the HF=206 had an exponential horn (EDIT: says "reciprocating flare" in the catalog scan I posted, doesn't it? ).

 

[mhardy6647]

I know that quoting oneself is poor form but... in response to my "EV still sell[ing] the Cobraflex" comment above: yup.

CLEARANCE Electro-Voice Cobreflex IIB Sectoral Horn

Electro-Voice Cobreflex IIB Sectoral HornThe Cobreflex® Series of folded sectoral horns from EV / University Sound features a patented design that eliminates high frequency phase cancellation and improves intelligibility. Ideal for use with the ID Series and 1800 Series horn drivers, the...

www.parts-express.com

 

[fpitas]

Later, yes. Not in the early days of the T35 family.
The "Cobraflex" horn, e.g., started life as a University product, but ended up with EV branding.
Heck, I think they are still selling the Cobraflex!

The HF-206 was a University horn/driver. I drew a blank when @egellings invoked it, because I was thinking "EV".

View attachment 301037
Das Ding an sich Note the University Cobraflex, too.
source: https://www.alliedcatalogs.com/flipbook/1960_allied_radio_catalog.html

The EV T-35, T-35B, T-350, and TW-35 tweeters used a diffraction horn that EV was quite proud of back in the day.
Pretty sure the HF=206 had an exponential horn (EDIT: says "reciprocating flare" in the catalog scan I posted, doesn't it? ).

Hypersonic, huh. Yeah it looks vaguely exponential. And not cheap, that would be about $350 now.

 

[mhardy6647]

Hypersonic, huh. Yeah it looks vaguely exponential. And not cheap, that would be about $350 now.

The horn itself may well be exponential, so, yeah, I was a bit sloppy in teasing that apart from the characteristics of the throat. Sorry.
That said, I am happy to spend some more forum bandwidth on these tweeters.
Col. Paul W. Klipsch was quite enamored of them for reasons known only to him. In Klipsch's (metaphorical) hands, the T35 (known in Klipsch parlance as the "K-77") made a nasty, harsh name for itself. EV's crossovers tended to get better out of the same drivers, but I don't know why (maybe higher XO frequency? I don't know).

The Col. also either didn't understand (not likely) or didn't care (much more likely -- he was nothing if not an iconoclast! ) that the T35 was meant to be oriented with the long axis of the horn vertical to provide the best horizontal dispersion. Some of his loudspeakers oriented the T35 correctly, but most of them... did not.
There were some "vertical horn" Cornwalls, e.g.

(random internet image of a pair of mirror-imaged 'vertical Cornwalls')

My (long gone) 1974 Cornies, and indeed most of them using the EV tweeter and horn, had the MR and tweeter horns horizontal.
Derp.



Pay no heed to the "damping" applied to the MR horn -- a vain attempt to calm that sucka down!
The only thing that really would improve the Cornwall involves an accelerant and a match.

 

[fpitas]

The horn itself may well be exponential, so, yeah, I was a bit sloppy in teasing that apart from the characteristics of the throat. Sorry.
That said, I am happy to spend some more forum bandwidth on these tweeters.
Col. Paul W. Klipsch was quite enamored of them for reasons known only to him. In Klipsch's (metaphorical) hands, the T35 (known in Klipsch parlance as the "K-77") made a nasty, harsh name for itself. EV's crossovers tended to get better out of the same drivers, but I don't know why (maybe higher XO frequency? I don't know).

The Col. also either didn't understand (not likely) or didn't care (much more likely -- he was nothing if not an iconoclast! ) that the T35 was meant to be oriented with the long axis of the horn vertical to provide the best horizontal dispersion. Some of his loudspeakers oriented the T35 correctly, but most of them... did not.
There were some "vertical horn" Cornwalls, e.g.

(random internet image of a pair of mirror-imaged 'vertical Cornwalls')

My (long gone) 1974 Cornies, and indeed most of them using the EV tweeter and horn, had the MR and tweeter horns horizontal.
Derp.



Pay no heed to the "damping" applied to the MR horn -- a vain attempt to calm that sucka down!
The only thing that really would improve the Cornwall involves an accelerant and a match.

I recall the tweeters on the Sentry III were vertical, too. I think.

Edit: nevernind, I'm crazy.

 

[legrandmeaulnes]

View attachment 301003View attachment 301004View attachment 301005View attachment 301006View attachment 301007View attachment 301008

Hello. Is that your speakers in the corner? I'm asking because I have two pairs of Electro voice 12trxb speakers and was considering building a pair of these Knight KN 1200 which are, I believe, Klipsch Rebel IV. They are identical. I even found the plans of the Rebel four speakers. Paul Klipsch was unhappy about the project and abandoned it, but you never know.... So, if these are your speakers, how do they sound? Are you happy with them? Do you have one 12trxb speaker into each one or two each? Thanks in advance.

 

[Mr. Widget]

I recall the tweeters on the Sentry III were vertical, too. I think.

Edit: nevernind, I'm crazy.

You may be crazy, but thinking EV used the T35A in the Sentry III is not an indication of your condition.

 

[Valvetubehead]

Hello. Is that your speakers in the corner? I'm asking because I have two pairs of Electro voice 12trxb speakers and was considering building a pair of these Knight KN 1200 which are, I believe, Klipsch Rebel IV. They are identical. I even found the plans of the Rebel four speakers. Paul Klipsch was unhappy about the project and abandoned it, but you never know.... So, if these are your speakers, how do they sound? Are you happy with them? Do you have one 12trxb speaker into each one or two each? Thanks in advance.

Cool! I have a couple of cabinets my father built from kits in the late 1950’s. They are mismatched… he’d built one for himself and one for his parents. ‘Stereo’ was not popular enough to him just quite at that moment. I inherited both after my grandmother passed away. The finish on one is korina blonde the other walnut. The blonde one is loaded with the 12trxb while the brunette has a University diffusicone twelve and EV t35 tweeter. They’re both still original and functioning just fine.
I would characterize the sound quality as colored by their surroundings. I’ve listened to them in different rooms where the amount of furnishings made them sound more or less bass. The tweeters are umm not the best, but they work and are not offensive to me, however they lack precision of modern drivers. I enjoy the speakers for nostalgic reasons and use them for older recordings, like swing era, big band etc. As far as the cabinets being Klipsch knock-off corner speakers with the concept of using walls to project … your mileage may vary. They are delightful looking speakers with a great story. The cabinets are large enough where a different alignment (maybe sealed) with modern drivers could get you into a compelling HiFi experience… instead of era specific. A matched pair of enclosures + drivers would most certainly sound better.

 

[legrandmeaulnes]

Cool! I have a couple of cabinets my father built from kits in the late 1950’s. They are mismatched… he’d built one for himself and one for his parents. ‘Stereo’ was not popular enough to him just quite at that moment. I inherited both after my grandmother passed away. The finish on one is korina blonde the other walnut. The blonde one is loaded with the 12trxb while the brunette has a University diffusicone twelve and EV t35 tweeter. They’re both still original and functioning just fine.
I would characterize the sound quality as colored by their surroundings. I’ve listened to them in different rooms where the amount of furnishings made them sound more or less bass. The tweeters are umm not the best, but they work and are not offensive to me, however they lack precision of modern drivers. I enjoy the speakers for nostalgic reasons and use them for older recordings, like swing era, big band etc. As far as the cabinets being Klipsch knock-off corner speakers with the concept of using walls to project … your mileage may vary. They are delightful looking speakers with a great story. The cabinets are large enough where a different alignment (maybe sealed) with modern drivers could get you into a compelling HiFi experience… instead of era specific. A matched pair of enclosures + drivers would most certainly sound better.

Thanks a lot. On the Klipsch forum, the few people who have got that klipsch rebel/shorhorn model have just the one speaker. So, it is difficult to get an idea of the performance. But I guess the horn is not long enough. There's no folded horn inside. But they are the coolest vintage speakers. Very elegant. I've got the EV12trxb speakers mounted in an open baffle and they work beautifully. But the open baffles are in the middle of the room. Perhaps a couple of diy EV Aristocrat enclosures are an alternative. I'm in Italy and certainly can't get a pair shipped. Another Klipsch-licensed corner speaker. At least many people have got a pair of those and you can get online an idea of the performance in stereo. Thanks again.

 

[Mr. Swordfish]

I currently have nine, count 'em nine, EV speakers.

Six of which are hooked up and in regular usage.

And about a dozen EV microphones.