Compression drivers?

[mhardy6647]

Relatively uncommon -- but for those who wish for lifelike dynamics and (perhaps) some directivity control -- compression drivers & (yes...) horns have their charms.
Unfortunately, a good compression driver requires both brute strength and delicacy in design and construction (like a huge off-road truck with a high-performance, turbocharged Diesel engine, perhaps) -- which, practically speaking, means they don't come cheap. I don't think you'll find many injection-molded compression drivers
On the bright side, good compression drivers, coupled to good horns, can bring both brute strength and delicacy to the reproduction of reproduced sound, too.

I resisted for a long time, but I've been a convert for a couple of decades now.

 

[sarumbear]

Insane! 140dB!

106dB at around 50m, which is how far away you are from the speakers at a live event.

 

[Trdat]

I love there look, i love there build. If i win in a lottery i need two of them, and two 15" subis, thats it, endgame for me.

Here here.

Once you go compression and 15 inch you can't go back.

Next would be even larger horn!!

 

[sarumbear]

Relatively uncommon -- but for those who wish for lifelike dynamics and (perhaps) some directivity control -- compression drivers & (yes...) horns have their charms.
Unfortunately, a good compression driver requires both brute strength and delicacy in design and construction (like a huge off-road truck with a high-performance, turbocharged Diesel engine, perhaps) -- which, practically speaking, means they don't come cheap. I don't think you'll find many injection-molded compression drivers
On the bright side, good compression drivers, coupled to good horns, can bring both brute strength and delicacy to the reproduction of reproduced sound, too.

I resisted for a long time, but I've been a convert for a couple of decades now.

Unless you have a crossover with a time delay control what you show is almost impossible to cross-over. You have approximately 0.6mS delay between the two horns.

 

[mhardy6647]

Unless you have a crossover with a time delay control what you show is almost impossible to cross-over. You have approximately 0.6mS delay between the two horns.

heaven forefend!

One picks one's battles -- and everything is a work in progress.
Time delay isn't exactly a hard thing to achieve in 2021.

 

[voodooless]

Genelec S360 makes use of a compression driver: https://www.genelec.com/s360a

 

[DanielT]

Relatively uncommon -- but for those who wish for lifelike dynamics and (perhaps) some directivity control -- compression drivers & (yes...) horns have their charms.
Unfortunately, a good compression driver requires both brute strength and delicacy in design and construction (like a huge off-road truck with a high-performance, turbocharged Diesel engine, perhaps) -- which, practically speaking, means they don't come cheap. I don't think you'll find many injection-molded compression drivers
On the bright side, good compression drivers, coupled to good horns, can bring both brute strength and delicacy to the reproduction of reproduced sound, too.

I resisted for a long time, but I've been a convert for a couple of decades now.

Horn..drivers and so on..Macho, smf speakers.

 

[Plcamp]

The power response and distortion levels I have seen from Joseph Crowe, using compression drivers in combination with wrap around horns look to me to be unbeatable. It costs but hard to argue against the measured results.

 

[voodooless]

My plan for compression drivers would be a S360 look-a-like with:

- BMS 5530ND compression driver
- XT1086 horn
- B&C 10NW76 or Beyma 10MC700Nd woofer in a leaky enclosure for directivity control
- Powered by budget DSP and class D amps and motion feedback for the woofer

But first, the idea is to build a centre, also with a compression driver (4" B&C coaxial actually)... Time is sparse though.

 

[sarumbear]

Genelec S360 makes use of a compression driver: https://www.genelec.com/s360a

View attachment 177397

That doesn't look like a compression driver. The clue is in the word "compression".

 

[Jmudrick]

I'm sure the compression driver in the JBL Studio 530 accounts for much of its appeal . At a ridiculously low on sale price.

 

[voodooless]

That doesn't look like a compression driver. The clue is in the word "compression".

Why do you think it's not?

 

[sarumbear]

Why do you think it's not?
View attachment 177406

I stand corrected.

 

[tomtoo]

Horn..drivers and so on..Macho, smf speakers.

Yeah, compression drivers and 15" subis is macho, the way i like. )

 

[kipman725]

Measurements from BIG CD's and Horns

As some of you probably know I switched out the top end of my big warehouse system a long time ago. I went from JBL 2445H's on 2360A's to Celestion AXI2050's on Klipsch K-402's. I took a bunch of measurements but never got around to posting any of it. I'm not going to devote too much time writing...

data-bass.ipbhost.com

some measurements of the AXI2050. For home use all the SPL you need and more...

 

[bigjacko]

Geddes said in the horn thread on diyaudio, that compression driver is better than dome in any way, except bad ones that has huge amount of higher order modes. Compression driver also suits horn better as horn is designed to transfer flat wave front into curved wave front. Dome tweeter has surround, plus it is a dome moving axially, the wave front is very complex and bad for a horn. Compression driver theoritically output flat wave front.

@Tom Danley , I am sure you are the right guy, do you have any input on compression driver?

 

[Trdat]

My plan for compression drivers would be a S360 look-a-like with:

- BMS 5530ND compression driver
- XT1086 horn
- B&C 10NW76 or Beyma 10MC700Nd woofer in a leaky enclosure for directivity control
- Powered by budget DSP and class D amps and motion feedback for the woofer

But first, the idea is to build a centre, also with a compression driver (4" B&C coaxial actually)... Time is sparse though.

What your take on motion feeback on woofers? Is it worth the extra effort?

And what did you use cause usually the technology is connected to a woofer and amp in one. I don't think the B&C or the Beyma is a motion feedback woofer.

 

[voodooless]

What your take on motion feeback on woofers? Is it worth the extra effort?

I guess for a reflex design it’s not needed that much (and exceedingly hard to do), but for a closed box, it should keep distortion in check nicely. The leaky enclosure adds additional strain on the woofer, see distortion of the D&D for instance. It’s only 10” after all, and not a 15” driver as some others would advocate for But These drivers are already very low distortion, so I might add the motion feedback later on.

And what did you use cause usually the technology is connected to a woofer and amp in one. I don't think the B&C or the Beyma is a motion feedback woofer.

I hope to use a DIY kit from a Dutch motion feedback nutcase It consists of an accelerometer and the electronics.

 

[Katji]

@Tom Danley , I am sure you are the right guy, do you have any input on compression driver?

I've noticed the name here (at ASR) but didn't realise. But I'm not a horn guy.

 

[Mnyb]

GGNTKT uses compression drivers for treble ? Aren’t they .

Model M1 - Active loudspeaker for immersive sound experiences.

Model M1 is a compact and digital 2.5-way active loudspeaker, equipped with waveguide, cardioid bass and FIR filters. Listen for yourself →

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