images and details taken from stereonet australia forums.
"Altec MR94B Mantaray constant directivity horns with 288C compression drivers and Altec 413-8 bass drivers in Onken designed cabinets re-tuned to 33Hz.
Passive two way Hiraga crossovers suited for 24 ohm compression drivers and 8 ohm bass drivers as above.
Overall very smooth, detailed and gets down to 25Hz with no effort. No sub required most of the time."
"Altec MR94B Mantaray constant directivity horns with 288C compression drivers and Altec 413-8 bass drivers in Onken designed cabinets re-tuned to 33Hz.
Passive two way Hiraga crossovers suited for 24 ohm compression drivers and 8 ohm bass drivers as above.
Overall very smooth, detailed and gets down to 25Hz with no effort. No sub required most of the time."
Attachments
Well, Star Wars VI was THX at Lenox Square [popular somewhat upscale Atlanta Mall] in '83, so assume it was JBL since the better performing B0$3 system was too pricey and years before Altec's A10-MR945A [not EV as I previously noted] was certified IIRC. I guess I was thinking EV since by then Altec had moved to the University Sound [later EVI] Okla. plant: ALTEC LANSING A10-MR945A VOTT SPEAKER SYSTEM MANUAL Pdf Download.
Local cinemaplex were horrible sounding Klipsch last time I went to one for 'Saving Private Ryan'. Sheesh! Doesn't seem like 19 yrs ago.
Anyway, bet the A10 sounds better, what with a smaller throat, big a$$ Mantaray! 😉
Wish I could have auditioned Altec's original A9, 10 monster IB Dolby submissions for Star Wars IV, but allegedly, JBL 'bought' the contract since Altec was in financial trouble: A9 A10
GM
Have secured a pair of Altec MRII 564 horns. Now to find a pair of nice 1.4" HF drivers. Fatials still top on the list it seems. Not common for sale on used market by the looks of it.
Very nice! Poor driver match up, but guess it's 'slim pickings' when wanting Altec 'down under' and still better overall than most 15" woofers.
Won't 'dig down' to ~16 Hz like the Santiago's original 411, but if it's doing < 30 Hz with authority, not too shabby after cheapening it up.
GM
Altec drivers are quite expensive and then it remains to be seen whether these are technically ok.
Last edited:
Saving Private Ryan is one of the very few movies I saw more than once. Obviously for the opening scene and later the approaching Tiger tank, while the guys were listening to Edith Piaff (I guess) played through the old grammophone.
Hi,
Altec 288 exit angle is 8°. A near perfect match would be the HF140 with 7°.
Which horn?
Has anyone tried Faitals on the 2360?
KR Barossi
Altec 288 exit angle is 8°. A near perfect match would be the HF140 with 7°.
Which horn?
Has anyone tried Faitals on the 2360?
KR Barossi
Last edited:
That would be for the Altec MRII 564s tuyen has scored.
I am sure the 2" Faitals will do just fine mated to the 2360. Probably better than any of the original JBL drivers.
Tony Gee got excellent results with the HF201 and 2380.
I am sure the 2" Faitals will do just fine mated to the 2360. Probably better than any of the original JBL drivers.
Tony Gee got excellent results with the HF201 and 2380.
Last edited:
Btw, I don't suggest a Faital is better than an Altec or any JBL driver. Just that New GPA drivers are quite expensive, as is used Altec. In addition, used Altec can be damaged or broken.
The original 4" JBL 244.. drivers used with the 2360 are good for midrange and up to 15kHz max. At home the smaller diaphrams of the Faitals are capable of 500-600Hz, but better >10kHz.
The original 4" JBL 244.. drivers used with the 2360 are good for midrange and up to 15kHz max. At home the smaller diaphrams of the Faitals are capable of 500-600Hz, but better >10kHz.
Last edited:
Understood.
Yeah, GPA pricing is a bit much since it's a ~hand crafted, very low volume assembly.
I'm just curious because I haven't paid any serious attention to new prosound drivers since the late '80s and no attention after the Altec distributor switched to B0$3 in the early '90s.
Re JBL to 15 kHz?! They must have done some serious improvement somewhere along the line [see attached].
GM
I really like the Faital stuff. Look @ company profile:
https://faitalpro.com/downloads/files/documents/FaitalPRO_Company_Profile.pdf
BTW i own Altec 288 and like them, but i think that Faital Pro is completely underated and they have better driver for home use. IMHO it makes no sense to „hunt“ for old grannies like 288 or 24xx in bad shape or pairs with completely different manufacturing dates or magnet status.
Perhaps I was not clear enough about the JBL 4" drivers.
After a lot of effort it appears some members of the Lansing forum have managed to squeeze out 15kHz, but obviously this isn't 'clean output'.
After a lot of effort it appears some members of the Lansing forum have managed to squeeze out 15kHz, but obviously this isn't 'clean output'.
Last edited:
For sure, though a conical horn + some CD horn EQ [RLC network, AKA frequency contour filter] will do it at the expense of efficiency, which of course is the physics of the situation [speaker design 101], i.e. always trading efficiency for [a wider] BW.
GM
Very true indeed.
On the Lansing forum there's a ton of info to be found on the classic 4" drivers, as well as many experiments with diaphragms.
In conclusion: these are good up to about 9-10 kHz and (severely) compromised above.
On the Lansing forum there's a ton of info to be found on the classic 4" drivers, as well as many experiments with diaphragms.
In conclusion: these are good up to about 9-10 kHz and (severely) compromised above.
The 4" JBL Ti drivers coated with aquaplas do a good job, like the 2453H-SL in which you can see some plots here: 2453H-SL on STX825 waveguide over 2265g-1 center channel - AVS Forum | Home Theater Discussions And Reviews
My 2453H-SL's on the 2384 waveguide measure very similar in the top octave. Looking at the distortion curves, it is pretty clean output.