Data Sheet

Compression
Drivers
SPECIFICATIONS
Throat diameter 2" (50.8 mm)
Nominal impedance 8 or 16 Ohm
Power capacity
Middle range (AES)
150 W RMS above 400 Hz
peak 1000 W peak above 500 Hz
High range (AES) 80 W
peak 450 W
Sensitivity
1W/1m 118 dB on 2242 Horn
Frequency range (Hz) 300 – 22000
Recommended crossover 300 Hz
Middle frequenzy range 300 - 7000 Hz
High frequenzy range 6000 - 22000 Hz
Middle/High crossover 6300Hz
Voice coil high-range 1.75” (44.4 mm)
Voice coil mid-range 3.5” (90 mm)
Magnet material Ceramic
Flux density (Tesla) 1.95
Efficency 35% (300 - 5000 Hz)
Voice coil material Copper Clad Aluminium
(2Layers in and outside of the VC)
Voice coil former Kapton™
Diaphragm material Polyester
Mounting information
Overall Diameter 182 mm (+/- 3 mm)
Depth 129 mm
Net weight 9 kg
4x M6 holes, 90° on 101.6 mm, 4” diameter
BMS 4590, SPL 1W / 1m, 4 V RMS
BMS 4590, SPL 1W / 1m, 4 V RMS
50
Features:
Extended bandwidth (300 - 22000 Hz)
Point source sound reproduction
Excellent phase coherence
With two subsystems in one, each driver covers a smaller
frequency range for increased power handling, high
dynamic and extremely low distortion
Perfect time alignment without problems
of multi-source interference
2” Coaxial Compression Drivers 4590 / 4590P
2” Coaxial compression driver
In a conventional full range compression driver the phase plug
must be located extremely close to the diaphragm, excursion
of the diaphragm is limited and middle frequency performance
is compromised. A typical 2" dome compression driver has a
limited high frequency response. Over 8 kHz the dome
diaphragm breaks up causing resonance and harsh, metallic
sound.
BMS 4590P, including passive crossover, SPL 1W / 1m
The BMS annular midrange diaphragm covers the frequency
range between 400 and 7000 Hz with a smooth, linear response.
The large diaphragm excursion of max. +/-0.8 mm results in
high output and increased power handling up to 1300 W peak.
The ultra light annular diaphragm for the high range offers
exceptional transient response with very high efficiency from
6 to 22 kHz.