BMS 4540ND is a 1-inch 8 ohm compression driver rated at 60 W RMS. The source-backed specifications include sensitivity 114 dB, range from 1200 Hz, to 30000 Hz, throat 25.4 mm. bits tracks vendor pricing and datasheet links from the same loudspeaker database.
Source-backed specifications
Motor and cone
Voice coil
38mm
Power and response
Sensitivity
114dB
Power
60W
Impedance
8Ω
Range
1200–30000Hz
Crossover
1900Hz
Throat
25mm
Size and mounting
Diameter
72mm
Depth
45mm
Weight
0.53kg
Other published values
Power Peak
300
Everything else BMS lists
HF
SPL
114dB
Power
60W
Impedance
8Ω
Power Peak
300
Sensitivity
114dB
Low limit
1200Hz
High limit
30000Hz
Throat
25mm
Manufacturer sensitivity
114dB
Voice coil
38mm
Crossover
1900Hz
4. peak power
300 W
1. throat diameter
1″ (25.4 mm)
8. frequency range
1200 – 30000 Hz
11. magnet material
Neodymium
7. max. spl (cont.)
132 dB at 60 W
14. voice coil former
Kapton TM
2. nominal impendance
8 or 16 Ohm
15. diaphragm material
Polyester
10. voice coil diameter
1.5″ (38 mm)
13. voice coil material
Copper Clad Aluminum
3. power capacity (aes)
60 W
12. flux density (tesla)
2.2
6. plane wave tube, 1 mw
118 dB
9. recommended crossover
1900 Hz
5. cd horn 90° x 75°, 1 w / 1 m
114 dB
02
Where to buy
Prices for delivery to the UK, including VAT. How prices work