Revelator 4" Midrange
ScanSpeak
Type Number:12M/4631G00

Features

The Revelator series has for years been celebrated for producing the best sounding electro dynamic transducers in the world. Since ScanSpeak 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 cone, which reduces break-up modes in the membrane dramatically. The result is an undisputed clarity in sound.

Driver Highlights: Low loss suspension, Sliced paper cone, Compact linear motor system

Specs

Electrical Data
Nominal Impedance Zn 4 ohm
DC Resistance Re 3.2 ohm
Voice Coil Inductance Le 0.22 mH
TS Parameters
Resonance Frequency fs 75 Hz
Mechanical Q factor QMS 5.57
Electrical Q factor QES 0.35
Total Q factor Qts 0.33
Force Factor Bl 5.3 Tm
Mechanical Resistance Rms 0.55 Kg/s
Moving Mass Mms 6.5 g
Effective Piston Area sd 49 cm^2
Equivalent Volume Vas 2.4 ltrs
Sensitivity 2.83V/1m 89 dB
Power Handling
100h RMS noise test IEC 40 W
Voice Coil and Magnet Parameters
Voice Coil Diameter 38 mm
Linear Excursion +/- 3 mm
Max mech. excursion +/- 7 mm

Frequency

Mechanical Dimensions

Drawing Dimensions
Outside Diameter OD 115.5 mm
Flange Thickness FT 3 mm
Magnet Diameter MD 61 mm
Cutout Diameter CD 92 mm
Interior Depth ID 48.4 mm
Hole Diameter HD 4.2 mm
Screw Circle Diameter SD 103 mm