JBL LE15 / 2215 Woofer

Few woofers command the reverence of the JBL LE15—known professionally as the 2215—a 15-inch powerhouse from the peak of JBL’s engineering prowess. Born in the golden age of high-fidelity, it combined an Alnico V magnet with meticulous craftsmanship to deliver bass that was deep, articulate, and effortlessly dynamic. For audiophiles and studio engineers in the 1970s, this driver wasn’t just a component—it was the foundation of a sonic benchmark.

Specifications

Type	15" (380mm) Cone Woofer
Voice Coil Diameter	3 inches (76mm)
Magnet	Alnico V
Nominal Impedance	8 Ω (LE15A), 16 Ω (LE15B)
Power Handling	75W continuous
Frequency Response	25 Hz - 2 kHz
Sensitivity	94 dB/W/m
Resonant Frequency (Fs)	~20 Hz

Design Features

Alnico V Magnet: Delivers lightning-fast transient response and a smooth, organic low end—rare in modern ferrite designs
Treated Paper Cone: JBL’s proprietary blend offers rigidity without brittleness, translating to natural, uncolored bass
Edgewound Voice Coil: An aluminum ribbon coil that reduces mass and inertia, enhancing speed and control
Cast Frame: A robust die-cast aluminum chassis ensures stability, even under high excursion

Applications

JBL L200 Studio Master
JBL L300 Summit
High-end hi-fi installations
Professional studio monitors

Enclosure Design

JBL’s own Professional Enclosure Guide lays out the ideal setup for the LE15/2215, treating it as a high-performance low-end driver or dedicated subwoofer. Chart #9 is the go-to reference, calling for a spacious 6.0 cubic foot (170 liter) vented enclosure tuned to 40 Hz. The recommended internal dimensions—27.0" H x 22.0" W x 19.1" D—accommodate generous airflow through four 4-inch ducts (totaling 50.3 sq in), each precisely 8.2 inches long to optimize tuning accuracy.

Application	Hi-fi low-end or subwoofer
Chart Reference	#9
Enclosure Volume	6.0 cubic feet (170 liters)
Tuned Frequency	40 Hz
Internal Dimensions	27.0" H x 22.0" W x 19.1" D
Vent Area	50.3 sq in (4x 4" ducts)
Duct Length	8.2 inches

View the complete JBL Professional Enclosure Guide →

Related Drivers

JBL 2235H - Ferrite magnet successor with similar performance
JBL 2234H - Similar Alnico design with different parameters
JBL 136A - Predecessor 15" woofer

eBay Listings

JBL LE15 Woofer vintage audio equipment - eBay listing photo 1

1pcs 15 Inch High Quality Speaker Surround Edge Repair For J

$180

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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