Data Sheet

Compression

Drivers

1” Compression Drivers 4538

1” High frequency compression driver

Features:

Unique patented design

114dB sensitivity 1W/1m

1.9 kHz Crossover

Extended high frequency response up to 30 kHz

Very small size and low weight

38 mm voice coil

BMS 4538 is a powerful 1" professional compression driver

that delivers excellent sonic quality in a small package. The

unique BMS annular diaphragm together with the patented

radial phasing plug achieve very high sensitivity and linear

frequency response up to 30 kHz. The sound of the BMS 4538

has an exceptional dynamic range and produces even the most

complex music signals with depth and definition.

The BMS 4538 - 1" compression driver is designed for a wide

variety of applications including small to medium high quality

professional reinforcement systems and stage monitors. The

4538 offers all the benefits of the patented BMS compression

driver design, but at much reduced cost.

SPECIFICATIONS

Throat diameter 1” (25.4 mm)

Nominal impedance 8 Ohm

Power capacity (AES) 60 W

Peak Power 300 W

Sensitivity

CD Horn 90°x75°, 1W/1m 114 dB

Plane wave tube, 1mW 118 dB

Maximal SPL (cont.) 132 dB at 60 W

Frequency range 1200 – 30000 Hz

Recommended crossover 1900 Hz

Voice coil diameter 1.5” (38 mm)

Magnet material Ceramic

Flux density (Tesla) 1.9

Voice coil material Copper Clad Aluminium

Voice coil former Kapton™

Diaphragm material Polyester

MOUNTING INFORMATION

Overall diameter mm 96

Depth mm 40

Net weight kg 0.98

2x M5 holes, 180° on 76,2 mm

BMS 4538-8, CD 90/75 Horn, SPL 1W / 1m

BMS 4538-8, CD 90/75 Horn, SPL 10W / 1m