JBL 4312 MKII 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 4312 MKII is a legendary three-way control monitor that continues the iconic lineage of JBL’s professional studio speakers. Originally designed for near-field monitoring in recording studios, the 4312 series became one of the most recognizable and beloved monitor speakers among audiophiles and music professionals worldwide.

Featuring a powerful 12-inch white-cone woofer, a dedicated midrange driver, and a precise high-frequency tweeter, the JBL 4312 MKII delivers a lively and dynamic sound signature. Its presentation is characterized by tight, impactful bass, a highly engaging midrange, and crisp detailed highs — making it ideal for rock, jazz, vinyl playback, and classic recordings.

The classic black control panel with adjustable mid and high frequency controls, combined with the signature JBL monitor design, reflects the brand’s heritage from the famous Northridge, California production era. The result is a speaker that combines professional monitoring accuracy with the musical excitement that vintage JBL monitors are known for.

Secure this unit today before another collector does.

• Condition: Fully tested, serviced and restored
• MODEL: 4312 MKII
• TYPE: 3 way, 3 driver loudspeaker system
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 12QE0105

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
• Frequency Response: 40Hz to 40kHz
• Power Handling: 200W
• Crossover Frequency: 2000, 5000Hz
• Impedance: 6Ω
• Sensitivity: 93dB
• Bass: 1 x 305mm cone
• Midrange: 1 x 101mm cone
• Tweeter: 1 x 25mm dome
• Enclosure: bass reflex
• Finish: black
• Dimensions: 23.50 × 14.25 × 11.73 inches (597 × 362 × 298 mm)
• Weight: 39.46 lbs (17.9 kg)

KEY FEATURES:

• 3-Way Studio Monitor Design – Dedicated woofer, midrange, and tweeter drivers for accurate full-range sound reproduction
• • 12-Inch White Cone Woofer – Iconic JBL low-frequency driver delivering deep, punchy, and dynamic bass
• • Front Bass Reflex Port – Improves low-frequency extension and allows flexible placement in listening rooms
• • Mid & High Frequency Level Controls – Adjustable front panel controls for fine tonal tuning based on room acoustics
• • High Power Handling – Capable of handling dynamic peaks while maintaining clarity and control
• • Professional Monitor Heritage – Part of JBL’s legendary control monitor family used in studios worldwide
• • Classic JBL Monitor Styling – Signature white woofer, black baffle, and studio monitor layout loved by collectors

REFURBISHED

This pair of JBL 4312 MKII speakers has been professionally inspected and serviced by HQaudios to ensure excellent performance, reliability, and cosmetic condition.

1. Cabinet Restoration
   • Cabinets professionally cleaned and detailed
   • Exterior surfaces inspected and treated to restore the original finish
   • Structural integrity checked to ensure cabinet stability
2. Driver Inspection & Service
   • Woofer, midrange, and tweeter drivers carefully inspected
   • Cones and suspensions checked for proper movement and condition
   • Voice coils tested to verify correct impedance and operation
3. Crossover & Internal Electronics
   • Crossover network inspected and tested
   • Internal wiring checked and secured
   • Solder joints inspected and refreshed where necessary
4. Controls & Connectivity
   • Mid and high frequency level controls cleaned and tested
   • Speaker terminals cleaned to ensure solid signal transfer
5. Acoustic Performance Testing
   • Both speakers tested for balanced stereo output
   • Frequency response and driver behavior verified through listening tests
   • Final system test completed to confirm stable performance

Result

These JBL 4312 MKII speakers now deliver the powerful dynamics, lively midrange, and punchy bass response that made the 4312 series famous. The sound remains energetic and engaging while maintaining the clarity and balance expected from a professional studio monitor design.

⚠️ Note: Speaker stands are not included.

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

Suggested Pairings:

• Pioneer SX-980 – Classic silver-face warmth with strong dynamics and punchy bass
• Sansui AU-717 – Excellent control with rich, natural midrange
• Marantz 2325 – Smooth vintage warmth with powerful low-frequency authority
• McIntosh MA6200 – Clean, controlled amplification with excellent headroom
• Luxman L-430 – Detailed and balanced sound with refined presentation

For vinyl setups, pairing with a high-quality turntable and MM phono stage will highlight the 4312 MKII’s engaging midrange, tight bass response, and lively studio monitor sound.

🎁 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.