JBL 4311WX-A Control Monitor Speaker Pair

Walnut / Black – 3-Way Studio Monitors – Restored – 1-Year Warranty

Professionally Restored by HQaudios – Fully Tested – Backed by Our 1-Year Warranty.

About This Pair

Offered here is a pair of JBL 4311WX-A Control Monitor speakers, a classic three-way professional monitor design from JBL’s 1970s studio-monitor era.

The 4311WX-A uses a 12-inch white-cone low-frequency driver, a dedicated 5-inch midrange driver, and a direct-radiator high-frequency driver in a compact bass-reflex enclosure.
Front-panel Presence and Brilliance controls allow adjustment of the midrange and high-frequency balance.

This pair features Walnut veneer cabinets with black front baffles and black grilles and has been professionally restored and tested by HQaudios.

Video Demo & Sound Test

A sound-demo video of this exact JBL 4311WX-A pair is included so buyers can see and hear both speakers operating before purchase.

Key Highlights

• JBL 4311WX-A Control Monitor speaker pair
• 3-way bass-reflex professional monitor design
• JBL 2213 12-inch white-cone woofer
• JBL LE5-2 5-inch cone midrange
• JBL LE25 direct-radiator high-frequency driver
• Passive crossover network
• 1.5 kHz / 6 kHz crossover frequencies
• 8-ohm nominal impedance
• 91 dB SPL / 1W / 1m sensitivity
• 45 Hz – 15 kHz ±3 dB frequency response
• 75 W continuous program power capacity
• Front-panel Presence and Brilliance level controls
• Walnut veneer cabinets with black baffles and black grilles
• Restored / rebuilt black grille assemblies
• Upgraded rear binding posts
• Professionally restored and tested by HQaudios
• 1-Year HQaudios Technical Warranty

Why This Model Is Notable

The JBL 4311 series, introduced in the early 1970s, became one of JBL’s best-known compact professional control monitors.
Its large 12-inch woofer, dedicated midrange driver, front-panel level controls, and high sensitivity made it a practical studio monitor and later a favorite among vintage JBL enthusiasts.

Professional Restoration & Testing

Before Restoration

Initial inspection identified age-related cabinet wear, grille deterioration, worn mounting hardware, terminal damage, and other signs of long-term use and storage.

The cabinets, drivers, crossover sections, Presence and Brilliance controls, terminals, grilles, labels, and mounting hardware were inspected to determine the work required for this specific pair.

During Restoration

• Walnut veneer cabinets cleaned and cosmetically restored
• Woofer cones and dust caps cleaned and cosmetically refreshed
• Grille assemblies restored / rebuilt with new black cloth and replacement mounting pegs
• Damaged rear terminal hardware upgraded to modern binding posts
• Rusted mounting screws and hardware replaced
• Presence and Brilliance level controls cleaned and treated
• Driver assemblies, accessible crossover areas, controls, and terminals carefully cleaned and detailed

All original JBL drivers were retained during restoration; their cones and diaphragms are original and in good condition.

Final Testing

• Low-frequency, midrange, and high-frequency sections checked for proper operation
• Presence and Brilliance control operation verified across their usable range
• Rear terminal operation checked
• Driver polarity and left/right consistency verified
• Extended real-world listening test completed

Technical Condition

All three driver sections on both speakers are operating and the pair has been tested for consistent left/right performance.
The front level controls and upgraded rear binding posts were checked after service.

Sound Character

The JBL 4311WX-A delivers the direct, dynamic presentation associated with classic JBL control monitors.
Its large white-cone woofer provides strong low-frequency impact, the dedicated midrange section gives clear vocal and instrument presence,
and the LE25 high-frequency driver adds crisp upper-frequency detail.
The front Presence and Brilliance controls allow the tonal balance to be adjusted to suit the room and listening preference.

Cosmetic Condition

This JBL 4311WX-A pair presents in Very Good restored vintage cosmetic condition.
The Walnut veneer cabinets, black baffles, and restored black grilles show well overall, with light age-related wear remaining as shown in the listing photos.

• Cabinets: Walnut veneer with light age-related marks as shown
• Front Baffles: Black finish with the classic 4311WX-A three-way layout
• Grilles: Restored / rebuilt assemblies with new black cloth and replacement mounting pegs
• Drivers: Original JBL drivers retained, cleaned, and serviced
• Rear Panels: Upgraded binding posts installed; rear model labels present as shown
• Known Flaw: Small chip on the black grille-frame edge shown in the listing photos
• Stands: Wooden display stands shown in the photos are not included

Please review all listing photos carefully, as they show the actual pair and form an important part of the cosmetic description.

Specifications

What’s Included

• 1 Pair (2) JBL 4311WX-A Control Monitor Speakers
• Restored Black Front Grilles

Wooden display stands are not included. Only items clearly shown in the photos or specifically listed above are included.

Suggested Pairing

With an 8-ohm nominal impedance and approximately 91 dB sensitivity, the JBL 4311WX-A works well with a wide range of clean vintage and modern amplification.
Avoid sustained clipping and use amplifier power appropriate to the speaker’s published power capacity.

Contact us for amplifier and complete-system matching. Package pricing may be available when purchasing compatible components together.

Professional Packing & Shipping

Each speaker will be individually protected with reinforced packing around the Walnut cabinet,
black baffle, woofer, midrange, high-frequency driver, grille, corners, and upgraded rear terminals.
Heavy-duty cartons and internal cushioning will be used to prevent movement and protect the pair during transit.

1-Year HQaudios Technical Warranty

This JBL 4311WX-A pair is backed by our 1-Year HQaudios Technical Warranty
for qualifying functional issues under normal intended use and related to the restoration work performed by HQaudios.

Warranty does not cover misuse, incorrect wiring, amplifier clipping, physical damage, unauthorized repair,
cosmetic wear, or operation outside the manufacturer’s intended specifications.