JBL 4311B Control Monitor Speakers – Professionally Restored – Fully Tested – 1-Year Warranty

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

Up for sale is a stunning pair of the legendary JBL 4311B Control Monitors. As the professional studio counterpart that inspired the legendary consumer L100 Century, The 4311 series became widely used in professional control rooms, small studios, mixdown facilities, broadcast monitoring, and portable playback systems during the 1970s.

The 4311B features JBL’s famous 12-inch 2213 white cone woofer (which famously runs full-range without a crossover network for maximum punch), a highly articulate 5-inch LE5 midrange, and the snappy LE25 paper cone tweeter. Finished in beautiful real walnut veneer with the iconic black front baffle, these speakers deliver the raw, uncompressed energy of a live studio session.

Whether you are outfitting a vintage mixing room or building a high-energy analog Hi-Fi system, the JBL 4311B delivers a thrilling, highly dynamic, and deeply nostalgic listening experience that puts you directly behind the mixing console.

Key Highlights

• Authentic JBL 4311B 3-Way Control Monitors
• Iconic 12-inch (300mm) White Cone Woofer (2213) for fast, powerful bass
• 5-inch (130mm) Midrange Driver (LE5-10)
• 1.4-inch (36mm) High-Frequency Direct Radiator (LE25-2)
• Front-Panel L-Pad Controls for Mid and High-Frequency Adjustments
• Beautiful Real Walnut Veneer Cabinets with Black Baffles
• Professionally Restored and Serviced by HQaudios
• High Efficiency Design – Pairs Perfectly with Solid-State and Tube Amps
• Backed by Our 1-Year HQaudios Warranty

Sound Character

The JBL 4311B is the absolute definition of the classic “West Coast” sound: punchy, forward, unapologetically energetic, and incredibly revealing.

Because the 12-inch woofer runs full-range without being choked by a crossover coil, the bass and lower-midrange response is lightning-fast and viscerally impactful. The 5-inch midrange pushes vocals, snare drums, and electric guitars out into the room with startling presence, placing the performers right in front of you. The LE25 paper tweeter adds a crisp, snappy high end that perfectly complements the analog warmth of vinyl records and vintage tape.

This is a speaker that excels at rock, funk, R&B, and jazz. It is dynamic, lively, and demands your attention, delivering a true front-row concert experience.

HQaudios Restoration & Testing Process

Drivers, Crossovers & Cabinets

The unique “full-range woofer” design of the 4311B requires the drivers to be in perfect mechanical health to sound their best. The ability to tailor the midrange and high frequencies to your specific acoustic space using the front L-Pads makes this a highly versatile monitor.

Because the acoustic integrity of these vintage drivers dictates the final sound, they receive particular attention throughout HQaudios’ restoration process. Whenever possible, close-up photographs of the drivers, cabinets, and baffles are included, and additional photos or videos are available upon request.

Specifications

What Is Included

Pair of JBL 4311B Control Monitor Speakers.

Original speaker grilles as pictured.

Only the items clearly shown in the photos or specifically listed in the description are included.

Video Test & Sound Demo

We understand that purchasing vintage audio equipment online requires confidence.

If you would like to see these JBL 4311Bs in operation before purchasing, please contact us. Whenever available, we are happy to provide additional photos, close-up images, operational videos, or sound demonstrations.

You are also welcome to visit the HQaudios YouTube channel to explore restoration projects, product demonstrations, and listening sessions featuring professionally restored vintage audio equipment.

Suggested Pairing

The JBL 4311B is a highly efficient speaker, making it remarkably easy to drive. Because it is incredibly revealing and forward, it pairs beautifully with vintage 1970s amplification that offers a warmer, more full-bodied tone to create a perfectly balanced, nostalgic system.

Basic Use Guide

To help maintain the long-term performance of your vintage monitors, we recommend the following:

• Place the speakers on sturdy speaker stands, ideally orienting them so the tweeters are at ear level for the best stereo imaging.
• Use high-quality, properly gauged speaker wire.
• Periodically rotate the front Presence and Brilliance L-Pads back and forth to keep the internal contacts clean and prevent oxidation.
• Keep the cabinets away from direct sunlight and extreme humidity to protect the wood veneer.
• Contact us anytime if you need assistance with room placement, amplifier matching, or setup.

Trade-In Program

Do you have vintage audio equipment you’d like to trade in?

HQaudios welcomes trade-ins on receivers, amplifiers, speakers, cassette decks, reel-to-reel decks, turntables, and other classic audio components.

Simply send us photos and basic information about your equipment. Our team will gladly review your items and discuss available trade-in options.

Build Your Vintage System

Looking to build a complete vintage audio system?

The JBL 4311B pairs beautifully with professionally restored receivers, amplifiers, turntables, and tape decks available from HQaudios.

If you’re planning to purchase multiple components, ask us about available package pricing and complete system recommendations tailored to your listening preferences.

Shipping & Packaging

Vintage studio monitors are heavy, delicate, and require careful packing. This pair will be professionally packed with strong protection to help ensure safe delivery.

• Custom foam padding to protect the drivers and front baffle controls.
• Corners and real wood veneer protected with heavy-duty edge guards.
• Strong, multi-layered boxing for each speaker individually.
• Tracking information provided after shipment.

For very heavy or fragile units, local pickup may also be available by appointment.

1-Year HQaudios Warranty

This item is backed by our 1-Year HQaudios Warranty, covering proper electronic and functional operation under normal home use.

Our goal is to provide a confident and comfortable buying experience. If you have any questions after receiving your item, please contact us first through our website. We are here to help.

Warranty does not cover misuse, physical damage, blown voice coils due to amplifier clipping, unauthorized repair, or shipping damage after delivery.

Important Note for Buyers

Vintage speakers are acoustic instruments. They require proper room placement and capable amplification to sound their best.

We do our best to describe each unit clearly and provide detailed photos so you can buy with confidence. Please review all photos, read the full description, and contact us with any questions before purchase.

HQaudios – Vintage Audio Restored with Care.
Professionally Restored • Fully Tested • Carefully Packed • 1-Year Warranty