BMS 4599-8 ohm 2" DUAL DIAPHRAGM MIDRANGE DRIVER!! 400 Watts AES HIGH Efficiency!

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Sale price$1,299.90 Regular price$1,499.00



  • Dual 3.5” voice coils / annular diaphragms
  • Perfect acoustical coupling
  • Extreme high efficiency
  • Exceptionally high power handling of 400 W (AES)
  • Provides 6 dB more sound pressure than a comparable single voice coil driver
  • Ultra low distortion
  • Specially designed for extreme high output applications
  • Neodymium magnet assembly
  • Ultra light weight and small size
  • 2x 4 or 2x 8 Ohm

 CALL 801-589-2029 before purchasing!!!!


The BMS 4599ND dual diaphragm driver incorporates two identical 3.5” concentric annular ring diaphragms, connected to a common 2” throat, providing extremely high acoustical output.
The patented design of the BMS 4599ND is a result of extensive dedicated research and development, providing dramatic improvement in efficiency, power handling, dynamic response and clarity. 
In fact the double voice coil/diaphragm assembly provides 6 dB higher maximal SPL compared to an equal single voice coil driver.

Two large annular diaphragms cover the frequency range 200 Hz to 8000 Hz with a smooth, linear response.
The high diaphragm excursion of maximal +/- 0.8 mm results in high output and increased power handling up to 2600 W peak. 

The unique voice coil technology employs a high purity copper wire wound inside and outside of the Kapton™ former to improve the heat dissipation, dramatically increasing the acoustic output and reliability of the driver, while minimizing the power compression.
The voice coils may be driven in parallel, serial or separately for optimal amplifier loading, allowing a single channel of 4, 8, or 16 Ohm as well as double channel of 2x 4 Ohm or 2x 8 Ohm.
The use of high grade neodymium magnets provides improved performance while significantly reducing transducer weight.


The 4599 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 distance
  • Security systems
  • Emergency devices
  • Mass notification systems
  • Systems for scattering birds from airports
  • Marine applications
  • Military and police communication system
  • Noise cancelation systems
  • High End Audio Loudspeakers

ASK any questions before you buy!


We have distributed ALL TOP BRANDS for 28 years.

We have all the other major PRO Audio Speaker Brands and Models.

We sell to Dealers as well. 




Throat diameter:

2" (50.8)

Nominal Impedance

8 or 16 Ohm

Power capacity:


Middle Range (AES):

150 W AES above 400 Hz


1000 W peak above 500 Hz

High Range (AES):

80 W


450 W

Sensitivity 1 W / 1 m

118 dB on 2242 Horn

Frequency Range (Hz):

300 - 8000

Recommended Crossover:

300 Hz

Middle Frequency Range:

300 - 7000 Hz

High Frequency Range:

Middle / High Crossover:

Voice Coil High Range:

1.75" (44.4 mm)

Voice Coil Mid Range:

3.5" (90 mm)

Magnet Material:


Flux Density (Tesla) high:


Flux Density (Tesla) mid:



35 % (300 - 8000 Hz)

Voice Coil Material:

Copper Clad Aluminum


(2 layers in- and outside of the VC)

Voice Coil Former:

Kapton TM

Diaphragm Material:



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