Notes:
All measurements unless otherwise stated made anechoically at 2 meters and refer-
enced to 1 meter by the inverse square law.
The reference measurement microphone position is located perpendicular to the cen-
ter line of the mid and high frequency transducers, at the point 55 mm (2.2 in) below
the center of the tweeter diaphragm
1Mean SPL from 100 Hz to 20 kHz.
2Describes anechoic (4) low frequency response. Acoustic loading provided by the
listening room will increase low frequency bass extension.
3Distortion measurements performed with the input voltage necessary to produce the
stated A-weighted SPL at the stated measurement distance. Distortion figures refer to
the maximum distortion measured in any 1/10th octave wide band in the stated fre-
quency range.
4Power nonlinearity figures based on the A-weighted deviation from linear increase in
SPL with linear increase in input power (i.e., power compression) measured after 3
minutes of continuous pink noise excitation at the stated power input.
JBL continually engages in research related to performance improvements. New mate-
rials, production methods, and design refinements are introduced into existing prod-
ucts without notice as a routine expression of that philosophy. For this reason, any
current JBL product may differ in some respect from its published description, but will
always equal or exceed the original design specification unless otherwise stated.
Specifications:System:
Input Impedance (Nominal): 4 ohm
Anechoic Sensitivity1: 93 dB/2.83 V/1 m (90 dB/ 1 W/ 1 m)
Frequency Response (60 Hz – 22 kHz): +1. -1.5 dB
Low Frequency Extension2:
-3 dB: 54 Hz
-10 dB: 35 Hz
Enclosure Resonance Frequency: 33 Hz
Long Term Maximum
Power (IEC265-8): 200 W continuous average; 800 W peak
Recommended Amplifier Power: 150 W - 1000 W (rating into 4-ohm load)
High Frequency Control (2.5 to 20 kHz):
0 dB, -1 dB
Distortion, 96 dB SPL, 1 m3:
Low Frequency (below 120 Hz):
2nd Harmonic: <1.5%
3rd Harmonic: <1%
Mid and High Frequency
(120 Hz to 20 kHz):
2nd Harmonic: <0.5%
3rd Harmonic: <0.4%
Distortion, 102 dB SPL, 1 m3:
Low Frequency (below 120 Hz):
2nd Harmonic: <1.5%
3rd Harmonic: <1%
Mid and High Frequency
(80 Hz to 20 kHz):
2nd Harmonic: <1%
3rd Harmonic: <1% (Note: <0.4%, 250 Hz - 20 kHz)
Power Nonlinearity (20 Hz to 20 kHz):
30 Watts: <0.4 dB
100 Watts: <1.0 dB
Low-Mid Frequency Crossover:
4th Order Acoustic Linkwitz-Riley: 250 Hz
Mid-High Frequency Crossover:
4th Order Acoustic Linkwitz-Riley: 2.2 kHz
Transducers:
Low Frequency Model: 252G
Diameter: 300 mm (12 in)
Voice Coil: 50 mm (2 in) Differential Drive®with dynamic braking
coil
Magnet Type: Neodymium
Cone Type: Carbon Fiber Composite
Impedance: 4 ohms
Mid Frequency Model: C500G
Diameter: 125 mm (5 in)
Voice Coil: 50 mm (2 in) aluminum edge wound
Magnet Type: Neodymium
Cone Type: Kevlar™ composite
Impedance: 4 ohms
High Frequency Model: 053TiS
Diameter: 25 mm (1 in) diaphragm
Voice Coil: 25 mm (1 in)
Magnet Type: Ceramic 5
Diaphragm Type: Damped titanium composite
Other Features: Elliptical oblate spheroidal waveguide
Impedance: 4 ohms
Physical:
Finish: Smooth dark graphite
Enclosure Volume (Net): 50 liter (1.8 cu ft)
Input Connectors: 5-way binding posts
Input Features: Bi-wirable
Mounting: 4 threaded mounting points conforming to industry
standard square pattern, 127 x 70 mm (5 x 2.75 in)
center to center. M6 metric thread.
Baffle Construction: Injection molded structural ABS
Enclosure Construction: 19 mm (3/4 in) MDF
Net Weight: 20.4 kg (45 lb)
Dimensions (WxHxD): 63.5 x 39.4 x 29.2 cm (25.0 x 15.5 x 11.5 in)
Caution: Unsafe mounting or overhead suspension of any heavy load can result in serious injury and
equipment damage. Mounting of speakers should be done by qualified persons in accordance with all
applicable local safety and construction standards. Be certain to follow the instructions provided by
the manufacturer of the mounting bracket. Before selecting a mounting bracket, be certain that it is
capable of supporting the weight of the speaker to be mounted.