Just adding the link for convenience, I hope you don't mind.Cloth Ears said:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=21523
Impressive project in that thread.
I was able to listen to a pair of these (in a fully active arrangement as pictured) the night before and I must say that it was stunning.
They use 15" Volt drivers in a 4m TML and what seems to be ATC softdome-midranges. I don't know anything about the tweeters they use.
The sound was crystal clear and effortless, leaving the impression that it would even stay that way when driven at completely insane levels.
Regards
Charles
They use 15" Volt drivers in a 4m TML and what seems to be ATC softdome-midranges. I don't know anything about the tweeters they use.
The sound was crystal clear and effortless, leaving the impression that it would even stay that way when driven at completely insane levels.
Regards
Charles
Attachments
I've discovered that the tweeter and midrange are both Vifa units, sometimes used with a custom vesitgial horn/waveguide.
I honestly can't see ATC selling one of their direct competitors one of their key selling points, but the design similarities, other than the loading of the bass driver, are startling. They might even use the exact same Vifa soft dome (ATC use the D27TG in many of their monitors).
I honestly can't see ATC selling one of their direct competitors one of their key selling points, but the design similarities, other than the loading of the bass driver, are startling. They might even use the exact same Vifa soft dome (ATC use the D27TG in many of their monitors).
Mudge said:
Really! The Vifa D75MX softdome midrange? I cannot imagine it having the kind of "firepower" needed for this system. Sensitivity is around 91 dB, nominal power handling 80W RMS.
According to an US ATC sales rep. ATC does sell OEM drivers to other manufacturers but keeps the "best" (matched?) ones for their own design. I have seen ATC drivers in Genelec speakers. Also, according the rep. they do not sell the new SL range speakers OEM, neither does the new line of SCM monitors have a regular D27TG tweeter.
"Bottom line" (no pun intended): for high SPL, low distortion you should probably consider looking at two 15" for any combination of tweeter/midrange or horn/tweeter on the top, although I would immediately discount my statement by referring to the ATC three-way studio monitors SCM-300s that go very loud with very low distortion and contain one 15" driver only.
😀
The D75MX does seem to be the one😕
I have the same problem with the lack of firepower, but it's low frequency duties are probably alleviated by a high order crossover, or they have Vifa fit a different motor.
I'd be surprised if you managed to kill a midrange in a pro monitor, most of the time the bass driver fails from being smashed against the suspension as the engineer turns it up too loud.
Active crossovers are a pain when you're used to the tweeter distorting as an indication of 'volume' 😀
I still think an Adire XBL2 long throw driver is the solution to output. Of course this is an expensive solution...
I have the same problem with the lack of firepower, but it's low frequency duties are probably alleviated by a high order crossover, or they have Vifa fit a different motor.
I'd be surprised if you managed to kill a midrange in a pro monitor, most of the time the bass driver fails from being smashed against the suspension as the engineer turns it up too loud.
Active crossovers are a pain when you're used to the tweeter distorting as an indication of 'volume' 😀I still think an Adire XBL2 long throw driver is the solution to output. Of course this is an expensive solution...
Just my 2 cents...
I have the SA tweeter in my setup. The old 8526 which is a 10 kg monster with Fe magnets. Midrange are 2 jbl 2118 8 inchers. Bass is jbl 2226 in a 200L sealed enclosure soffit mounted in the corner. The whole thing is soffit mounted and actively driven using a sony digital crossover.
This is accidentially quite close to the griffin speaker. The system is described in an old aes paper from 89 albeit using a 30" fostex woofer.
quality and spl wise something along these lines would definately fit the spot. But regarding the SA tweeter, the sweet spot is small, especially in the vertical plane. at 16kHz roll off begins around 20 degrees off axis. I have mounted absorbers reducing the effective ribbon length to around 6 cm and thus sacrificing lets say 3db in efficiency.
For a no compromise system i would choose th PD 2450 24" woofer in a VERY large sealed enclosure.
cheers
andreas
I have the SA tweeter in my setup. The old 8526 which is a 10 kg monster with Fe magnets. Midrange are 2 jbl 2118 8 inchers. Bass is jbl 2226 in a 200L sealed enclosure soffit mounted in the corner. The whole thing is soffit mounted and actively driven using a sony digital crossover.
This is accidentially quite close to the griffin speaker. The system is described in an old aes paper from 89 albeit using a 30" fostex woofer.
quality and spl wise something along these lines would definately fit the spot. But regarding the SA tweeter, the sweet spot is small, especially in the vertical plane. at 16kHz roll off begins around 20 degrees off axis. I have mounted absorbers reducing the effective ribbon length to around 6 cm and thus sacrificing lets say 3db in efficiency.
For a no compromise system i would choose th PD 2450 24" woofer in a VERY large sealed enclosure.
cheers
andreas
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