JBL 4312B Speakers

JBL 4312B is a premium studio monitor speaker, building on the legacy of the 4311 and 4312 models with upgraded components and improved sound performance. Known for its flat frequency response and superior audio accuracy, the 4312B was designed for professional studio monitoring, but its legendary sound quality makes it equally sought after by home audio enthusiasts. With its 3-way design, the 4312B delivers detailed highs, well-defined mids, and robust bass, offering an immersive listening experience for both music professionals and audiophiles.

Detailed Specifications:

• Drivers:
  • Woofer: 12-inch (2213H)
  • Midrange Driver: 5-inch (LE5-10)
  • Tweeter: 1-inch titanium dome (035Ti)
• Frequency Response: 45Hz to 20kHz
• Power Handling: 150 watts
• Impedance: 8 ohms
• Sensitivity: 91 dB at 1 watt/1 meter
• Dimensions: 24.5″ (H) x 14.25″ (W) x 12″ (D)
• Weight: 45 lbs each

Testing Video

TRADE-IN PROGRAM

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

Condition:

This receiver is in “Excellent” condition, displaying minor signs of use with a bright, clear dial. All knobs, feet, and the attached AM antenna and AC cord are present and intact. Although the manual is missing, it can be found online or we can provide a PDF upon request. Please inspect all photos thoroughly for the actual condition.

Service:

Upon inspection, the unit had scratchy controls, a dim dial, and some distortion in one channel. Therefore, it underwent servicing by our technician. Manufacturer used certain transistors in this model that are known to fail after 40 years, so all of these were replaced. This upgrade resolved the distortion issue. Additionally, several questionable capacitors were replaced.

Testing:

After servicing, the receiver was tested on our bench and performed excellently, delivering a powerful, warm, distortion-free signal characteristic of analog receivers. All inputs, outputs, LED lights upgrade and features were confirmed operational, and the tuner spins smoothly. Additional testing was conducted, and we can provide specific feature information upon request. This is a remarkable find for the vintage audiophile.

Condition Disclosure:

This item exhibits minor wear consistent with light use, as shown in the provided photos. The listing includes exactly what is pictured; no accessories, test equipment, or media are included.

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