Beyma 18G550, 4 ohm, 18 inch woofer
Beyma 18G550, 4 ohm, 18 inch woofer
High power handling (900 WAES)
4.5" edgewound copper voice coil with polyimide fiber glass former
Large Xmax allowing longer voice coil displacements
Dual spider configuration of improved temperature behaviour: retain good mechanical properties at high power
Additional heat dissipation due to the use of a metal intercooler
Designed for high demanding subwoofer and woofer applications
This 18" bass loudspeaker has been specifically designed to deliver high impact bass response, with exceptional high power handling capacity (900 WAES). It incorporates an edgewound copper ribbon voice coil (4.5" diameter) made of high quality materials: high temperature magnet wire and polyimide fiber glass former.
Another point of interest is its massive vented magnetic structure, which combined with an optimum cooling system allows a fast heat exchange, thus reducing the thermal power compression. Furthermore, the use of a dual spider assembly assures that this loudspeaker can handle a real high power with an extremely controlled voice coil displacement. This model covers the low frequency range with smooth response, low harmonic distortion and high efficiency. It is mostly recommended for high demanding subwoofer and woofer applications.
General
Product type Cone driver
Brand Beyma
Reference 18G550
Product code 118G5508
Informations
Nominal impedance 4 ohm
Dimensional category 18 inch
Frequency coverage type Sub, Low
Manufacturer sensitivity 97 dB
Calculated sensitivity 95.79 dB
Nominal power handling 900 W
Max power handling 1800 W
Bandwidth 35÷1500 Hz
Fundamental parameters
Sd 1320 cm²
Mms 0.2 gr
Cms 117 µm/N
Rms 6 kg/s
Le 1.8 mH
Re 2.8 ohm
BL 23.4 T.m
Small signal parameters
Fs 33 Hz
Qes 0.42
Qms 7
Qts 0.4
Vas 290 L
Datas
Xmax ±5 mm
EBP 79 Hz
Zmin 3.4 ohm
Fs / Qts 83 Hz
Vas * Qts² 46.4 L
Efficiency 2.25 %
Calculated efficiency 2.39 %
Weight ~13.8 kg
Dimensions
Voice coil diameter 4.5 inch
Winding depth 25 mm
Gap height 12 mm
Outside diameter 462 mm
Baffle cutout diameter 415 mm
Depth 205 mm
Front thickness 15 mm
Depth after front 190 mm
Diamètre aimant (mm) 224 mm
Shape & Materials
Front chape Cylindrical
Magnet type Ferrite
Basket masterial Aluminium
Winding material Copper
Voice coil former Polyimide
Surround shape Triple roll
Surround material Cloth