JBL Professional 4181

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Single 460 mm (18") Cinema Subwoofer System

JBL 4181 is a high quality subwoofer system, featuring an advanced technology 460mm (18 in), low frequency transducer mounted in a direct radiator, bass-reflex enclosure for smooth response to the lowest audible frequencies. The 4181 is ideal for low-frequency augmentation of either analog or digital soundtracks in motion picture theaters and for general sound reinforcement applications.

Features

500 Watts continuous pink noise, 1000 Watts continuous program power handling
Usable response to 26 Hz (-10 dB), flat to 34Hz (-3 dB) with External EQ
Dual coils in parallel, vented cooling driver
– High Sensitivity
– Low Power Compression
– High Maximum-SPL Capability
– Low 2nd and 3rd Harmonic Distortion
– Long Excursion Capability

Cost effective movie sound track sound reproduction for basic cinema

Downloads

	Version	Language	Size	Uploaded
Spec Sheets
4181 Spec Sheet - ENG updated: Oct 2020			832 KB	Oct 2020
4181 Spec Sheet - CN updated: Oct 2020			856 KB	Oct 2020

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Parts & Service

Specifications

Rated Impedance	8 ohms
Minimum Impedance	5.6 ohms
Power Handling Capability	Continuos Pink Noise: 500 W Continuous Program: 1000 W Peak Power: 2000 W
Axial Sensitivity	50 Hz to 500 Hz; 101 dB, 1W @ 1m 40 Hz to 100 Hz; 99 dB, 1W @ 1m
Half-Space Reference Efficiency	Single Module: 5%; Two Modules: 10%; Three Modules: 15%; Four Modules: 20%
Max. Continuous Acoustical Power Output	Single Module: 25 W; Two Modules: 100 W; Three Modules: 225 W; Four Modules: 400 W
Maximum Continuous SPL @ 1 meter	Single Module: 126 dB; Two Modules: 132 dB; Three Modules: 136 dB; Four Modules: 138 dB
Maximum Peak SPL @ 1 meter	Single Module: 132 dB; Two Modules: 138 dB; Three Modules: 142 dB; Four Modules: 144 dB
Frequency Response	Lower Frequency Limits (no EQ): -10 dB: 28 Hz; -3 dB: 40 Hz Lower Frequency Limits (with EQ): -10 dB: 26 Hz; -3 dB: 34 Hz
Recommended Crossover Frequencies	High-pass: 20 Hz, 24 dB/octave or greater Low-pass: 80 Hz to 150 Hz, 12 dB/octave or greater
Distortion	2nd harmonic: < 3% 3rd harmonic: < 2%
System Polarity	EIA Standard. Positive voltage to RED terminal produces forward cone motion.
Input Connectors	Color-coded binding posts
Nominal Diameter	460 mm (18 in)
Materials and Finish	15mm MDF. Extensive bracing on all panels. Vinyl laminated.
Enclosure Tuning Frequency	30 Hz
Net Internal Volume	255 liters (9 cu. ft)
Dimensions (H x W x D)	1100 mm x 640 mm x 450 mm (43.3 in x 25.2 in x 17.75 in)
Net Weight	44 kg (96 lbs.)
Shipping Weight (ea)	50 kg (109 lbs.)