JBL E140 Low Frequency Driver

Born in the golden era of pro audio, the JBL E140 is a 15-inch musical instrument driver built to deliver thunderous, reliable low end for bass guitar and live sound applications. As part of JBL’s rugged E Series, it combines high efficiency with stage-ready durability—making it a favorite among gigging musicians and system techs who demand performance that won’t quit.

Specifications

Type	15" (380mm) Musical Instrument Driver
Voice Coil Diameter	3 inches (76mm)
Magnet	Ferrite
Nominal Impedance	8 Ω
Power Handling	200W continuous
Frequency Response	35 Hz - 2.5 kHz
Sensitivity	98 dB/W/m
Resonant Frequency (Fs)	~35 Hz

Design Features

High Efficiency: With 98 dB sensitivity, the E140 turns every watt into raw, room-filling bass
Musical Instrument Optimized: Voiced specifically for bass guitar and instrument amplification—tight, punchy, and articulate
Robust Construction: Engineered for the road, with components that withstand the shock, heat, and humidity of touring
Extended Low Frequency: A true 15-inch powerhouse, capable of deep, controlled lows that anchor any rig

Applications

Bass guitar cabinets
Sound reinforcement systems
Stage monitoring
General purpose low-end reinforcement

Enclosure Design

For optimal performance, JBL’s Professional Enclosure Guide lays out precise designs tailored to the E140’s characteristics—whether you're building a single or dual-driver cabinet.

Single Driver Configuration

Application	General purpose low-end
Chart Reference	#6
Enclosure Volume	4.0 cubic feet (113 liters)
Tuned Frequency	40 Hz
Internal Dimensions	23.6" H x 19.2" W x 16.7" D
Vent Area	25.1 sq in (2x 4" ducts)
Duct Length	6.5 inches

Dual Driver Configuration

Application	General purpose low-end
Chart Reference	#11
Enclosure Volume	10.0 cubic feet (283 liters)
Tuned Frequency	30 Hz
Internal Dimensions	32.0" H x 26.1" W x 22.6" D
Vent Area	75.4 sq in (6x 4" ducts)
Duct Length	15.2 inches

View the complete JBL Professional Enclosure Guide →

Related Drivers

JBL E145 - Higher power 15" MI driver
JBL E130 - Full-range 15" MI driver
JBL E155 - 18" bass guitar driver
JBL 2205H - Professional 15" alternative

eBay Listings

JBL E140-8 Speaker Woofer 15 Inch

$185

Recone Kit For JBL E140, K140 8 Ohm 15" woofer, Speaker Re

$85.90

Jbl D140r Speaker 15” 8 Ohm 8.8 Measured Woofer Reconed #159

$225

JBL Woofer 4" OEM from Model JBL E10 Tested Mint

$15.98

See all JBL E140 Woofer on eBay

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Documentation

Lansing Heritage - Comprehensive JBL specifications, photos, and historical documents
HiFi Engine - JBL manuals, service documents, and brochures
Audio Karma JBL Forum - Community discussions and restoration guides