4590 / 4590P

2" Coaxial Compression Driver

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 dynamics and extremely low distortion
Perfect time alignment without problems of multi-source interference
8 or 16 Ohm

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 perfomance is compromised. A typical 2″ dome compression driver has a limited high frequency response. Above 8 kHz the dome diaphragm breaks up causing resonance and harsh metallic sound.

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 increases power handling up to 1300 W peak. The ultra light annular diaphragm for the high range offers exceptional transient response with very high efficiency between 6 and 22 kHz.

Specification

4590 / 4590P Specification

Throat diameter:	2″ (50.8)
Nominal Impendance:	8 or 16 Ohm
Power capacity:
Middle Range (AES):	150 W AES above 400 Hz
Peak:	1000 W peak above 500 Hz
High Range (AES):	80 W
Peak:	450 W
Sensitivity 1 W / 1 m	118 dB on 2242 Horn
Frequency Range (Hz):	300 – 22000
Recommended Crossover:	300 Hz
Middle Frequency Range:	300 – 7000 Hz
High Frequency Range:	6000 – 22000 Hz
Middle / High Crossover:	6300 Hz
Voice Coil High Range:	1.75″ (44.4 mm)
Voice Coil Mid Range:	3.5″ (90 mm)
Magnet Material:	Ferrite
Flux Density (Tesla) high:	2.1
Flux Density (Tesla) mid:	1.95
Efficiency:	35 % (300 – 5000 Hz)
Voice Coil Material:	Copper Clad Aluminum
	(2 layers in- and outside of the VC)
Voice Coil Former:	Kapton TM
Diaphragm Material:	Polyester