JBL 4312E Pair of Speakers – Fully Restored & Serviced – 1 Year Warranty.

Condition: ⚠️ Note: Speaker stands are not included. Fully tested, serviced and restored – Excellent sound, great working. With over 2,000 fully serviced and certified vintage receivers/speakers delivered. HQaudios stands as one of the most reputable sources for high-quality audio units. If you’re browsing on a mobile device, scroll down and tap the Title to view the complete description.

ABOUT:

The JBL 4312E Control Monitor continues the long-standing heritage of JBL’s legendary studio monitor series. Designed as a modern evolution of the classic 4310/4311 lineage, the 4312E retains the iconic front-ported monitor layout and dynamic sound character that made these speakers a favorite in recording studios and audiophile systems alike.

Built with a 12-inch woofer, dedicated midrange driver, and precision dome tweeter, the 4312E delivers powerful bass, articulate mids, and crisp high frequencies. The front-firing bass reflex port allows flexible placement while maintaining strong low-frequency performance, making the speaker suitable for both studio monitoring and high-fidelity home listening.

With its classic black studio aesthetic and professional tuning controls, the JBL 4312E offers the unmistakable JBL sound signature—dynamic, engaging, and highly detailed. It remains a popular choice among music enthusiasts who appreciate both vintage monitor heritage and modern driver performance.

Order now and bring classic hi-fi back to life.

• Condition: Fully tested, serviced and restored
• MODEL: 4312E
• TYPE: 3 way, 3 driver loudspeaker system
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 12QE0101

Customer Service:

Once your item arrives, if you have questions about how your item functions or proper settings, please CONTACT US.

TRADE-IN PROGRAM

“If you have any vintage audios (receivers, speakers, cassette, reel to reel…) & want to upgrade with the serviced one, don’t hesitate to contact us for the best deal. You only need to pay for the difference between yours & mine….”

Note:

The actual color of the product may sometimes differ slightly from the photos due to lighting conditions, temperature, and the device used. Some angles in the photos may not fully reflect the product’s condition. Please read the description carefully and feel free to message us if you have any questions.

SPECS:

• Type: 3-Way, 3-Driver Loudspeaker System
• Power Handling: 200W
• Crossover Frequency: 2000Hz, 5000Hz
• Impedance: 6Ω
• Sensitivity: 93dB (1W @ 1m)
• Frequency Response: 40Hz – 40kHz
• Bass: 1 × 12″ (305mm) cone
• Midrange: 1 × 4″ (101mm) cone
• Tweeter: 1 × 1″ (25mm) dome
• Enclosure: Bass Reflex
• Finish: Black
• Dimensions (W × H × D): 14.25″ × 23.50″ × 11.75″ inches
• Weight: 39.5 lbs

KEY FEATURES:

• Classic JBL 3-way Control Monitor design derived from legendary studio speakers
• Powerful 12″ woofer delivering deep, controlled bass response
• Dedicated 4″ midrange driver for clear, accurate vocal reproduction
• 1″ dome tweeter providing smooth and extended high frequencies
• Front bass reflex port for improved low-frequency extension and flexible placement
• Mid-frequency and high-frequency level controls for system tuning
• High sensitivity (93 dB) allowing excellent dynamics with many amplifiers
• Wide frequency response 40 Hz – 40 kHz for detailed full-range playback

REFURBISHED

This pair of JBL 4312E speakers has undergone a complete inspection and professional servicing process by HQaudios to ensure reliable operation and optimal performance.

1. Cabinet Restoration

• Cabinets were carefully cleaned and conditioned to restore their original appearance.
• Minor surface marks were treated to maintain a uniform finish.
• Structural integrity of the cabinets was fully inspected to ensure durability.

2. Driver Inspection & Service

• Woofer, midrange, and tweeter drivers were individually tested for proper functionality.
• Cones, surrounds, and diaphragms were inspected and cleaned where necessary.
• Driver impedance and performance were verified to ensure balanced stereo operation.

3. Crossover & Internal Components

• Crossover networks were inspected to ensure stable frequency distribution.
• Internal wiring was checked and secured to maintain reliable signal flow.
• Connection points and solder joints were examined to prevent future issues.

4. Controls & Connectivity

• Mid-frequency and high-frequency level controls were cleaned and tested for smooth operation.
• Speaker terminals were cleaned to ensure solid electrical contact.

5. Acoustic Performance Testing

• Full-range audio tests were conducted to confirm accurate frequency response.
• Stereo balance and channel matching were verified through extended listening tests.

6. Final Check & QC

• Appearance: Cabinets, drivers, and grills were inspected to ensure excellent cosmetic condition.
• Performance: Final listening tests confirmed clear, dynamic, distortion-free sound.
• 2-Hour Stability Test: The speakers underwent a continuous 2-hour playback test to verify stable operation and consistent performance.

Result
The JBL 4312E speakers now deliver the signature JBL monitor sound—tight bass, articulate mids, and detailed highs. Fully serviced and tested, they offer reliable performance, excellent sound quality, and long-term listening enjoyment.

⚠️ Note: Speaker stands are not included.

✅ Backed by 1-Year Warranty (repair or replacement)

Suggested Pairings:

• Pioneer SX-1050 – Warm vintage tone with powerful drive
• Sansui AU-717 – Rich midrange and excellent control
• Yamaha A-S1200 – Clean, modern power with excellent detail
• McIntosh MA6200 – Smooth presentation with strong bass authority

🎁 GET A $100 VOUCHER INSTANTLY WHEN YOU BUY A COMBO!

PACKAGING & SHIPPING

Secure Packaging:

• Nylon wrap and sealed inner carton

• Custom EPE foam corners to protect edges

• Double-wall outer box for shock resistance

• Plastic straps + handling labels to ensure safe transit

Shipping Details:

• Dispatch Time: Ships within 3 business days

• Carrier: UPS Ground (tracked & insured)

• Signature Required: Yes (as buyer’s request)

• Transit Time: Typically 3–7 business days (USA)

International Shipping:

We offer global delivery through the eBay International Shipping Program. eBay handles customs, duties, and tracking.

📦 Note: Packaging may vary slightly depending on unit size or model, but safety and protection are always our top priority.