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Mid Range Driver with BMS 4599

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palesha View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote palesha Quote  Post ReplyReply Direct Link To This Post Topic: Mid Range Driver with BMS 4599
    Posted: 19 March 2023 at 12:12pm
BMS 4599 is used in my country from 660 hz onwards. The spl level is very high  123db as claimed. But in practice say you get 118db. But which low midrange driver to be used to match this.

4599ND SPECIFICATION

Throat:2" (50.8 mm)
Nominal impedance:2x 4 or 2x 8 Ohm
Power capacity (AES):400 W (2 x 200 W above 300 Hz)
Peak power:2000 W (2 x 1000 W above 400 Hz)
Sensitivity 2x1W@1m:123 dB on a 40°x 20° waveguide
Frequency range:200 - 9000 Hz
Recommended crossover:250 Hz
Voice coil:2x 3.5 " (2 x 90 mm)
Magnet material:Neodymium
Flux density mid-range:1.95 T
Voice coil material:Copper (2 layers Inside and outside of the VC)
Voice coil former:Kapton
Diaphragm material:Polyester

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smitske96 View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2023 at 12:14pm
I am more curious about what you would use as a HF above that one.
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Peter Jan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Jan Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2023 at 2:17pm
I would say something like 2 or 3 hornloaded high sensitivity 12" (like B&C 12PE32)
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Jo bg View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jo bg Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2023 at 4:45pm
You don't need to match that numer, it is sensitivity, it does not tell how loud this could go but just the level you get  with 1w input.
It is normal to have less sensitivity as you go lower but that is usually offset with more power capability, so you can push more power in the lower ways and reach same output level even if sensitivity is lower.

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palesha View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote palesha Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2023 at 2:29am
This means i need more powerful speaker to get more output.
or need to use multiple horn loaded speakers as suggested by peter jan. 
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smitske96 View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2023 at 8:12am
I would go for something like a dual PM60/PM90 LF section. But again, what you need above the BMS is much harder to fullfill imho.
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Lucasdude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lucasdude Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2023 at 9:14am
APPLICATIONS
The 4599ND has two most outstanding features:

It is the loudest audio transducer ever made
The frequency range is optimized for human voice.

Those capabilities make it best suited for:

Communication devices for long distances
Security systems

Emergency devices

Mass notification systems

Systems for scattering birds from airports

Marine applications

Military and police communication systems

Noise cancelation systems

High End Audio Loudspeakers
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Lucasdude View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lucasdude Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2023 at 9:16am
I never knew such a thing existed! Looking at the frequency response graphs, it's seems that the sweet spot for the driver is around 600hz-4khz.
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Lucasdude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lucasdude Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2023 at 9:21am
You could probably use one of those with 4x 12" and 4x 1.5" HF. With some clever space saving loading for the 12s, that could make for one helluva line array cab!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thirtha Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2023 at 2:03am
4599 presents two problems, 1. selecting the right horn ( some thing that can go down to 600 HZ ) and 2. getting a HF that can keep up with the 4599 all the way up to 16 K atleast. I have measured the 4599 using omni mic and I can say that the 4599 has nothing above 6/7 KHZ. 

Finding a good compression driver that can do 6K to 16K at the SPL of the 4599, and getting both horns to work well with each other is a nightmare. 
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csg View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote csg Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2023 at 7:13am


Edited by csg - 08 April 2023 at 7:14am
“The fact is this is about identifying what we do best and finding more ways of doing less of it better”
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LjudLahger Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2023 at 4:35pm
Originally posted by csg csg wrote:


ClapLOLTongue
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