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Description
JBL 4642A-GS
The JBL Model 4642A is a high quality subwoofer system, featuring an advanced technology 460 mm (18 in), low frequency transducers mounted in a direct radiator, bass-reflex enclosure for smooth response to the lowest audible frequencies. The 4642A is ideal for low-frequency augmentation of either analog or digital soundtracks in motion picture theaters and for general sound reinforcement applications.
Transducer:
The 2241H transducer utilizes the patented Vented Gap Cooling (VGC) process*, which pumps air through the magnetic gap and directly over and around the voice coil, providing immediate heat transfer and a reduction in operating temperature. This increases power handling while reducing power compression.
Through the use of computer-aided magnet optimization and analysis techniques, JBL engineers were able to optimize magnet weight, flux density and field saturation, resulting in a 2.6 kg (6.5 lb) reduction in overall driver weight and a significant reduction in harmonic distortion. This magnet structure offers much of the weight advantage of rare earth magnet structures without the prohibitive cost, enabling the system to carry a 1200 watt continuous AES pink noise power rating.
Features:
- 1200 Watts Continuous Pink Noise, 2400 Watts Continuous Program Power Handling
- Usable response to 22 Hz (-10 dB, no EQ), flat to 22 Hz (-3 dB) with External EQ
- 2241H VGCTM Vented Gap Cooled Drivers- High Sensitivity- Low Power Compression- High Maximum-SPL Capability- Low 2nd and 3rd Harmonic- Distortion- Symmetrical Field Geometry SFGTM- Magnet Structure- Long Excursion Capability
- Approved by Lucasfilm, Ltd. for THX installations
Specifications:
TRANSDUCERS: Two JBL Model 2241H 460 mm (18 in) Low Frequency Transducers
SYSTEM:
- Rated Impedance: 4 ohms
- Minimum Impedance: 3.2 ohms
POWER HANDLING CAPABILITY:
- Continuous Pink Noise: 1200 Watts
- Continuous Program: 2400 Watts
- Peak Power: 4800 Watts
OUTPUT CAPABILITY:
Axial Sensitivity:50 Hz to 500 Hz; 101 dB, 1W @ 1m40 Hz to 100 Hz; 100 dB, 1W @ 1m
Power Compression:
At -10 dB power (120 W): 0.8 dB
At -3 dB power (600 W): 2.6 dB
At rated power (1200 W): 4.3 dB
At -10 dB power (120 W): 0.8 dB
At -3 dB power (600 W): 2.6 dB
At rated power (1200 W): 4.3 dB
FREQUENCY RESPONSE:
Lower Frequency Limits (no EQ):-10 dB: 22 Hz-3 dB: 35 Hz
Lower Frequency Limits (with EQ):-10 dB: 20 Hz-3 dB: 22 Hz
Lower Frequency Limits (no EQ):-10 dB: 22 Hz-3 dB: 35 Hz
Lower Frequency Limits (with EQ):-10 dB: 20 Hz-3 dB: 22 Hz
Recommended Crossover Frequencies:
High-pass: 20 Hz, 12 dB/octave or greater
Low-pass: 80 Hz to 150 Hz, 12 dB/octave or greater
High-pass: 20 Hz, 12 dB/octave or greater
Low-pass: 80 Hz to 150 Hz, 12 dB/octave or greater
Distortion:
2nd harmonic: <2%
3rd harmonic: <2%
System Polarity: EIA Standard. Positive voltage to RED terminal produces forward cone motion.
Input Connectors: Color-coded push terminals
Net Weight: 98 kg (216 lbs.)
Shipping Weight: 109 kg (240 lbs.)
ENCLOSURE:
- Materials and Finish: 19 mm (3/4 in) particle board with 25 mm (1 in) baffle and back panel. Extensive bracing on all panels
- Enclosure Tuning Frequency: 25 Hz
- Net Internal Volume: 506 liters (18 cu. ft)
- Dimensions: 762 mm x 1219 mm x 610 mm, H x W x D 30 in x 48 in x 24 in
Tech Specs
$500 - $15,000 INSTANT APPROVAL / NO HARD CREDIT PULL: |
Delivery & Returns
At Gear Club Direct, we want you to be happy with your purchase. We understand that there are times when once a product is received, it may not be what you needed or wanted after all. So, we will gladly accept your qualifying return within 15 days of the delivery date. After 15 days of the delivery date, all sales are final.
The Return Process
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