Radian Audio Engineering 1.4" Exit Drivers 636PB/745PB/835PB

Quick find: Select a Model: 1" Exit Drivers 450PB/465PB/475PB 1.4" Exit Drivers 636PB/745PB/835PB 2" Exit Drivers 651PB/760PB/850PB 2" Neodymium Driver 950-PB

1.4" Compression Drivers

Over a decade ago, Radian Audio Engineering went into business with a commitment to manufacture loudspeaker components that accurately reproduce the full frequency range of the audio spectrum. We began by building coaxial loudspeakers and compression drivers. The Radian 636PB, 745PB and the 835PB, with a 3.0” diaphragm, represent the refinement of our design efforts in 1.4” exit-format compression driver technology.

All Radian compression drivers feature heat-treated structural alloy aluminum diaphragm domes which form an optimum balance of strength and low weight. This is a key factor in extending high frequency response.

Radian diaphragms utilize a Mylar® surround, which not only enhances the diaphragm’s reliability, but eliminates fatigue which destroys other compression driver diaphragms.

n addition to being virtually indestructible, Mylar® surrounds provide excellent dampening characteristics which translate into smooth, low-distortion, linear output devoid of the resonant peaks typically present in diaphragms made with metal surrounds.

Beyond the obvious advantages of our Mylar®-aluminum composite construction, Radian diaphragms utilize high temperature voice coil formers and advanced adhesives which allow Radian compression drivers to sustain high RMS and peak power levels over extended periods of time.

Radian diaphragm assemblies are self-aligning and may be rapidly serviced in the field by simply removing the three screws on the driver's backcap and replacing the old unit with the new one.

Superior sound quality, unparalleled power handling, extended high frequency response and high reliability make our compression drivers the preferred choice of loudspeaker systems manufacturers, consultants, contractors, designers and engineers around the world. They are ideal for use in high output, high power touring sound systems and stage monitors, while their low distortion, high fidelity and linear response delivers clear, crisp music and speech for theatrical, auditorium, stadium, convention and church installations.

Technical Data

	636PB	745PB	835PB
FREQUENCY RESPONSE	500 Hz – 20 kHz	500 Hz – 20 kHz	500 Hz – 20 kHz
MAXIMUM POWER HANDLING*	50 watts RMS	60 watts RMS	75 watts RMS
SENSITIVITY	112 dB, one watt at one meter	111 dB, one watt at one meter	112 dB, one watt at one meter
RECOMMENDED CROSSOVER	500 Hz, 24 dB/octave 1200 Hz, 12 dB/octave	500 Hz, 24 dB/octave 1200 Hz, 12 dB/octave	500 Hz, 24 dB/octave 1200 Hz, 12 dB/octave
NOMINAL IMPEDANCE (LF/HF)	8 or 16 ohms	8 or 16 ohms	8 or 16 ohms
D.C. Resistance	6.2 or 12.4 ohms (±10%)	6.2 or 12.4 ohms (±10%)	6.2 or 12.4 ohms (±10%)
VOICE COIL DIAMETER	3.0” (76.2mm)	3.0” (76.2mm)	3.0” (76.2mm)
THROAT DIAMETER	1.4” (35.56mm)	1.4” (35.56mm)	1.4” (35.56mm)
VOICE COIL MATERIAL	Edgewood copper- clad aluminum	Edgewood copper- clad aluminum	Edgewood copper- clad aluminum
DIAPHRAGM MATERIAL	0.002” (0.05mm) heat-treated aluminum alloy	0.002” (0.05mm) heat-treated aluminum alloy	0.002” (0.05mm) heat-treated aluminum alloy
DIAPHRAGM SUSPENSION	Mylar®	Mylar®	Mylar®
MAGNET	49.6 oz. (1.41 kg) Ferrite V	49.6 oz. (1.41 kg) Ferrite V	72.0 oz. (2.04 kg) Ferrite V
FLUX DENSITY	16,400 gauss	17,500 gauss	19,000 gauss
INPUT CONNECTORS	Goldplated push-button terminals	Goldplated push-button terminals	Goldplated push-button terminals
MOUNTING	Four 1/4-20 studs, on 4.0" (101.6mm) centers	Four 1/4-20 studs, on 4.0" (101.6mm) centers	Four 1/4-20 studs, on 4.0" (101.6mm) centers
DIMENSIONS	6.50” (165.1mm) diameter, 2.62” (66.5mm) deep less studs	6.50” (165.1mm) diameter, 2.85” (72.4mm) deep less studs	7.50” (190.5mm) diameter, 2.85” (72.4mm) deep less studs
WEIGHT	9.2 lbs. (4.18 kg)	11.2 lbs. (5.09 kg)	14.8 lbs. (6.72 kg)

636PB Amplitude vs. Frequency of the Radian 636PB measured on a 1.4” (50.8mm) high frequency horn with a one watt (2.83 Vrms) input at 8 ohms.

745PB Amplitude vs. Frequency of the Radian 745PB measured on a 1.4” (50.8mm) high frequency horn with a one watt (2.83 Vrms) input at 8 ohms.

835PB Amplitude vs. Frequency of the Radian 835PB measured on a 1.4” (50.8mm) high frequency horn with a one watt (2.83 Vrms) input at 8 ohms.