JBL 2118H Midrange Driver

Born in the golden era of professional sound, the JBL 2118H is an 8-inch midrange workhorse engineered for high-output reinforcement in demanding live environments. Compact, rugged, and blisteringly efficient, it nails the critical midrange with authority—making it a staple in multi-way systems where clarity and punch matter most.

Specifications

Type	8" (200mm) Cone Midrange
Voice Coil Diameter	2 inches (50mm)
Magnet	Ferrite
Nominal Impedance	8 Ω
Power Handling	100W continuous
Frequency Response	200 Hz - 6 kHz
Sensitivity	96 dB/W/m

Design Features

High Sensitivity: 96 dB efficiency cuts through dense mixes without straining amplifiers
Extended Range: Covers a wide midband, reducing the need for complex crossover networks
Sealed Chamber Operation: Engineered for tight, controlled response in isolated sub-chambers
Professional Construction: Built to endure the rigors of constant high-SPL operation

Applications

3-way and 4-way sound reinforcement systems
Large venue installations
Stage monitoring
High-output midrange reinforcement

Enclosure Design

JBL’s own enclosure guide spells it out clearly: the 2118H isn’t just dropped into any box. It demands precision tuning to deliver its full potential.

Sealed Sub-Chamber Required

Models 2118, 2123, and E110 used for midrange require a small, sealed sub-chamber of approximately 0.4 cubic feet (7 liters / 0.25 cu ft) net internal volume.

Sub-Chamber Design

Enclosure Type	Sealed sub-chamber
Required Volume	~0.4 cubic feet (7 liters / 0.25 cu ft)
Construction	Non-uniform box dimensions recommended
Insulation	Line interior with fiberglass
Alternative Design	Tube enclosure with "jelly roll" fiberglass fill

When opting for a tube design, loosely pack the interior with a “jelly roll” of fiberglass, then seal the driver’s back cavity using the baffle cutout. Remember: include the sub-chamber’s external volume when calculating the total box displacement.

View the complete JBL Professional Enclosure Guide →

Related Drivers

JBL 2123H - 10" midrange alternative
JBL E110 - 10" musical instrument midrange
JBL LE5 Series - Hi-fi midrange drivers

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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Lansing Heritage - Comprehensive JBL specifications, photos, and historical documents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