604H (GPA Series II) and Super Tweeter?

[baja]

hi,
after I've seen the latest 604 based version of jean hiraga, adding a jbl 2402h super tweeter, I'm wondering about the effects.
did someone ever tried the 604H in combination with a super tweeter?
next to the jbl tweeters the townshend tweeters look quite interesting, because it's possible to match them without crossover.
supertweeter
thanks for suggestions ...

[Todd W. White]

With the 604-8H-III, you don't need one...

[stéphane Rame]

"hi,
after I've seen the latest 604 based version of jean hiraga, adding a jbl 2402h super tweeter, I'm wondering about the effects.
did someone ever tried the 604H in combination with a super tweeter?
next to the jbl tweeters the townshend tweeters look quite interesting, because it's possible to match them without crossover.
supertweeter
thanks for suggestions ... "

Pics
P1010528.JPG (image)
P1010529.JPG (image)

St?phane

[baja]

@ todd: yes - somehow I expected this answer ... but this was my decision to go for the series II and not III. although it might by physically absurd, but I fell in love with this in-between 'modern' and 'vintage' sonic of the 604h series II. also the series III won't be a match with my 612b enclosures (not only because the horn jut out a little bit more ...)
however I'm curious about what a super tweeter could add to the 604(h).

@ st?phane: thanks for the images - I've seen that hiraga used both a fostex and a jbl tweeter at on the munich fair. at 6moons he added only the jbl tweeter.
could you report about how it sound?

thanks.

[speakerdave]

As I remember the 6 moons article, without going back and rereading, Hiraga was still using the two tweeters, but he had brought his speakers to the reviewer's home and did not have the front-firing tweeters with him for some reason. He uses the JBL 2402 facing backward, for ambience, perhaps, or to balance the HF hotspot the front-firing tweeter would create.

Having tried similar things, I would say the front-firing super tweeter adds "air" to the top end and may sharpen the image, separate the instruments, expand the sound stage somewhat, whereas the rear-firing diffuses it (perhaps could be labeled the Bose effect). As I recall the article, Hiraga didn't do much explaining about it all. Satisfactory results may require some extensive messing around with levels, crossover points and slopes, and aiming (considering reflecting surfaces). I never did any of this using the 604, so what effect it would have on the point-source quality, which is the raison d'etre of the coaxial format, I couldn't say.

Strictly speculation, but my guess is these measures are taken in anticipation of an expected criticism of the HF roll-off in the 604 format. For my money, the effort might better be put into creating a coaxial with a 1" beryllium compression driver, the ne plus ultra of mid/hi CD's that can rock without a supertweeter.