The Revelator series has for years been celebrated for producing the best sounding electro dynamic transducers in the world. Since Scan-Speak was founded in 1970, the audio engineers and R&D experts working on the line have been on a quest to create drivers that reveal all the sound in recordings, hiding nothing from the listener. This quest has resulted in several revolutionary inventions that remove distortion in the magnet systems and in the moving parts of the speaker. The philosophy is that the sound has to be very dynamic, giving a perfect transient response and providing tonal balance.

One of the latest inventions realized in the Revelator midrange design is the sliced paper (or wood) cone, which reduces break-up modes in the membrane dramatically. The result is an undisputed clarity in sound.

Driver Highlights: Low loss linear suspension, sliced paper cone, SD-1 motor

The Scan-speak 18W/4531G-00 is a 7" Revelator mid/woofer. It features a non-resonant cone and dust cap structure, dynamic linear suspension, SD-1 magnet system, "Grasshopper" cast chassis with maximized air flow and resonance terminating mounting system. Less resonance in all structures, lower compression and higher linearity, faster termination of excess energy and higher sound pressure capability. The 18W/4531G should have an F3 of about 65Hz sealed and 40Hz vented. Also an excellent choice for high end autosound applications.

ScanSpeak 18W/4531G 7" 4 ohm Revelator Midwoofer

TECHNICAL DATA:
Sensitivity 2.83V/1M 90dB
Free air resonance Fs 33 Hz
DC resistance 3.4 ohm
V.C. inductance 0.3 mH
Power 70W
Effective cone area 150 cm2
V.C. diameter 38 mm
VC height -
Air gap -

Lin. & max. excursion ±6.5 / ±11 mm
Air gap flux density -
Force factor BL Product 5.7 Tm
Moving mass incl. air 17.5 g
Net weight 1.75 kg
Vas 42 ltrs
Qms 5.2
Qes 0.38
Qts 0.35

Outside diameter: 182mm
Cut out: 156mm
Depth: 77mm
25.4mm = 1" = 2.54cm