JBL 4312 MKII Pair of Speakers – Professionally Restored – Fully Tested – 1-Year Warranty

JBL 4312 MKII Pair of Speakers – Professionally Restored – Fully Tested – 1-Year Warranty

Condition: 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.

1/ ABOUT

The JBL 4312 MKII is one of the most respected studio monitor loudspeakers in JBL's legendary 43xx series. Developed as an evolution of the classic 4310 and 4312 monitors, the MKII combines the unmistakable JBL studio-monitor sound with improved driver technology, wider frequency response, and greater overall refinement.

Designed for both professional monitoring and serious home listening, the 4312 MKII delivers the dynamic presentation, powerful bass, and detailed midrange that have made JBL monitors favorites among recording engineers, musicians, and audiophiles around the world.

This professionally restored pair has been carefully inspected, serviced, and fully tested by HQAudios to ensure reliable operation while preserving the authentic JBL sound that continues to make the 4312 MKII one of the most desirable vintage monitor speakers available today.

2/ SPECIFICATIONS

· Brand: JBL

· Model: 4312 MKII

· Type: Vintage Studio Monitor Speaker

· System: 3-Way Bass Reflex

· Impedance: 6 Ohms

· Power Handling: 100 Watts Continuous

· Sensitivity: 91 dB/W/m

· Frequency Response: 45Hz – 40kHz

· Dimensions: 362 × 597 × 300 mm (W × H × D)

· Included: Pair of speakers only, unless otherwise stated

· Warranty: 1-Year HQaudios Warranty

3/ KEY HIGHLIGHTS

· Authentic Pair of JBL 4312 MKII Studio Monitors

· Legendary JBL Professional Monitor Design

· Powerful 3-Way Bass Reflex System

· Dynamic, Detailed, and Highly Musical Sound

· Excellent Performance for Vinyl and Digital Sources

· Professionally Inspected and Serviced by HQAudios

· Fully Tested Under Real Listening Conditions

· Beautiful Vintage Cabinet Presentation

· Carefully Packed for Safe Shipment

· Backed by Our 1-Year HQaudios Warranty

4/ SOUND CHARACTER

The JBL 4312 MKII delivers the lively, dynamic presentation that has made JBL studio monitors famous worldwide. Bass is tight, punchy, and authoritative, providing impressive impact without sacrificing control.

The dedicated midrange driver reproduces vocals and instruments with excellent presence and realism, while the high-frequency driver extends smoothly to deliver outstanding detail, clarity, and air.

Whether you're enjoying jazz, classic rock, blues, acoustic performances, vocals, or vinyl playback, the 4312 MKII offers an energetic, engaging listening experience with outstanding imaging and excellent musical balance.

5/ COSMETIC CONDITION

This pair is in Excellent vintage cosmetic condition.

The cabinets remain attractive with only normal signs of age and previous use, including minor marks, light scratches, small veneer imperfections, or corner wear consistent with vintage equipment.

The grilles, JBL badges, cabinet corners, rear labels, and speaker terminals are shown clearly in the photos. Please review all photos carefully, as they form an important part of the description.

Overall, this is a beautiful pair that will display exceptionally well in any vintage audio system.

6/ TECHNICAL CONDITION

These JBL 4312 MKII speakers have been professionally inspected, serviced, cleaned, and tested by HQAudios technicians.

Service / inspection may include:

· Woofer Tested

· Midrange Driver Tested

· Tweeter Tested

· Crossover Network Inspected

· Input Terminals Checked

· Cabinet Structure Inspected

· Driver Surrounds Inspected

· Grilles and Badges Inspected

· Extended Real-World Listening Test Completed

· Final Quality Inspection Before Shipment

After inspection and testing, this pair performs properly and is ready to enjoy.

7/ RECOMMENDED AMPLIFIER MATCHING

The JBL 4312 MKII pairs exceptionally well with quality vintage receivers and amplifiers from brands such as:

· Marantz

· Sansui

· Pioneer

· McIntosh

· Yamaha

· Kenwood

· Luxman

· Accuphase

· Tube Amplifiers

For the best performance, we recommend using a clean, properly serviced amplifier with stable power delivery and sufficient output for this speaker model.

HQAudios is happy to assist with amplifier matching before purchase.

8/ VIDEO TEST & SOUND DEMO

Please contact us if you would like to hear a video test of this pair before purchase. We are happy to provide additional video, sound demo, or photos upon request.

9/ TRADE-IN PROGRAM

If you have vintage audio equipment such as receivers, amplifiers, speakers, cassette decks, reel-to-reel machines, or turntables and would like to upgrade to a professionally restored unit, please contact us.

HQAudios may accept trade-ins depending on the equipment, condition, and shipping location.

10/ SHIPPING & PACKAGING

Each speaker pair is professionally packed to maximize protection during shipment.

· Nylon Wrap and Sealed Inner Carton

· Custom EPE Foam Corner Protection

· Double-Wall Outer Box

· Plastic Straps and Handling Labels

· UPS Ground Tracked & Insured Shipping

· Signature Confirmation Available Upon Request

· International Shipping Available

11/ 1-YEAR HQAUDIOS WARRANTY

This pair is backed by our 1-Year HQaudios Warranty covering normal-use functionality related to the restoration work performed by HQAudios.

If you experience any issue, please contact us. We are committed to helping every customer and providing fair, professional support.

12/ IMPORTANT NOTE FOR BUYERS

Vintage loudspeakers may naturally show cosmetic signs of age. Every HQAudios restoration is performed to preserve the original JBL sound signature while improving reliability, stability, and overall presentation.

Please review all photos carefully and contact us with any questions before purchase.

HQAudios – Vintage Audio Restored with Care.

Professionally Restored – Fully Tested – Carefully Packed – 1-Year Warranty.