JBL 4310 Control Monitor

1968 – 1973

The JBL 4310 Control Monitor came out in 1968. It is a compact three-way studio monitor, and through the 1970s and 1980s it was the standard other studio monitors got measured against.

Overview

Production	1968–1970s
Type	Three-way studio monitor
Enclosure	Sealed (acoustic suspension)
Dimensions	24.5" H × 14" W × 12" D
Weight	45 lbs (20 kg)
Impedance	8 ohms
Sensitivity	91 dB (1W/1m)
Power Handling	50 watts RMS
Crossover	1,500 Hz and 7,000 Hz

Driver Configuration

Woofer: 10" JBL 123A-1 with white cone
Midrange: 5" JBL LE5-2 phenolic ring radiator
Tweeter: JBL LE25-4 1" dome tweeter

Historical Significance

JBL designed the 4310 for the growing number of small recording studios that had no room for large floorstanding monitors. Despite its compact size, the 4310 delivered:

Flat frequency response for accurate mixing
High sensitivity for uncompressed dynamics
Wide dispersion for consistent monitoring positions
Reliable, field-serviceable drivers

Evolution

The 4310 spawned an entire family of studio monitors:

4311: Updated version with improved woofer (123A-3)
4312: Further refinement with improved drivers
L100 Century: Consumer version of the 4310 for home use

Studio Legacy

Countless hit records were mixed on 4310 monitors, including albums by:

Steely Dan
Queen
Fleetwood Mac
The Rolling Stones

The 4310 had an accurate, revealing sound, which suited critical listening and mixing decisions.

Today

Vintage 4310 monitors are highly sought after by:

Recording engineers seeking classic monitor sound
Audiophiles who appreciate studio-grade accuracy
Collectors of vintage JBL equipment

Well-maintained examples still work well as monitors for both professional and home use.

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