No products in the cart.
JBL 4311 Speakers (Pair) – Vintage Control Monitor – Professionally Restored – Fully Tested – 1-Year Warranty
$2,499
-
- Authentic pair of JBL 4311 Control Monitor speakers
- Legendary JBL 43-series professional monitor design
- Classic 3-way, 3-speaker bass-reflex configuration
- 12-inch JBL low-frequency woofer
- 5-inch JBL LE5-2 midrange driver
- 1.4-inch JBL LE25 high-frequency driver
- Front-panel independent midrange and high-frequency level controls
- High-efficiency design with approximately 91 dB sensitivity
- 8-ohm nominal impedance
- Compact bookshelf / stand-mount cabinet design
- Classic JBL studio-monitor sound with strong dynamics and articulation
- Excellent vocal and instrumental clarity
- Professionally inspected and serviced by HQaudios
- Fully tested for driver output and channel balance
- Ideal for vintage stereo systems, studio use, or JBL collections
- Carefully packed for safe shipping
- Backed by our 1-Year HQaudios Warranty
1 in stock
JBL 4311 Speakers (Pair) – Vintage Control Monitor – Professionally Restored – Fully Tested – 1-Year Warranty
Professionally Restored by HQaudios – Fully Tested – Backed by Our 1-Year Warranty.
Up for sale is a beautiful pair of JBL 4311 Control Monitor speakers, one of the most recognizable vintage studio-monitor designs from JBL’s legendary 43-series.
Originally developed as a compact professional monitoring system for recording studios, control rooms, adjustment rooms, and portable playback applications, the JBL 4311 combines classic JBL driver technology with a compact bass-reflex enclosure.
The 4311 features a 12-inch low-frequency woofer, a 5-inch midrange driver, and a 1.4-inch high-frequency driver in a three-way configuration. The combination gives the speaker the lively, dynamic, and highly articulate presentation for which classic JBL monitors are widely appreciated.
The front-panel midrange and high-frequency controls allow the listener to make adjustments according to room acoustics and personal preference, making the 4311 particularly versatile in both vintage stereo systems and monitoring applications.
This pair has been professionally inspected, serviced, and tested by HQaudios and is ready for serious music listening, vintage studio use, or collection.
Whether you are a longtime JBL collector, a fan of classic studio monitors, or simply looking for a pair of vintage speakers with strong dynamics and an unmistakable character, the JBL 4311 is an excellent addition to a classic audio system.
Key Highlights
- Authentic pair of JBL 4311 Control Monitor speakers
- Legendary JBL 43-series professional monitor design
- Classic 3-way, 3-speaker bass-reflex configuration
- 12-inch JBL low-frequency woofer
- 5-inch JBL LE5-2 midrange driver
- 1.4-inch JBL LE25 high-frequency driver
- Front-panel independent midrange and high-frequency level controls
- High-efficiency design with approximately 91 dB sensitivity
- 8-ohm nominal impedance
- Compact bookshelf / stand-mount cabinet design
- Classic JBL studio-monitor sound with strong dynamics and articulation
- Excellent vocal and instrumental clarity
- Professionally inspected and serviced by HQaudios
- Fully tested for driver output and channel balance
- Ideal for vintage stereo systems, studio use, or JBL collections
- Carefully packed for safe shipping
- Backed by our 1-Year HQaudios Warranty
Sound Character
The JBL 4311 delivers the lively, direct, and highly articulate presentation that made classic JBL professional monitors so popular among recording engineers and music enthusiasts.
The large 12-inch woofer provides strong low-frequency impact and excellent dynamic scale, giving drums, bass guitar, electric guitar, and other rhythm instruments an immediate and energetic presentation.
The dedicated 5-inch midrange driver brings vocals, guitars, piano, horns, and other instruments forward with excellent clarity and presence.
The LE25 high-frequency driver provides clear and detailed treble reproduction while retaining the energetic character associated with vintage JBL monitors.
One of the defining features of the 4311 is its front-panel level controls. The midrange and high-frequency levels can be adjusted independently, allowing the listener to fine-tune the presentation according to room acoustics, placement, and personal listening preference.
The bass-reflex cabinet contributes to a full and dynamic low-frequency presentation while maintaining the compact dimensions of the 4311.
Overall, the JBL 4311 has a fast, energetic, forward, and engaging sound that works particularly well with rock, jazz, blues, vocal recordings, live music, and other program material where dynamics and presence are important.
Actual Condition
The speakers are in Very Good vintage cosmetic condition.
The cabinets may show normal signs of age such as light scratches, small marks, minor edge wear, or other cosmetic imperfections consistent with vintage use.
The front baffles, 12-inch woofers, midrange drivers, tweeters, level controls, grille assemblies, badges, and rear terminals are shown clearly in the photographs.
The natural aging and cosmetic differences expected from vintage JBL cabinets should be considered part of their character.
Please review all photographs carefully as they are an important part of the description and provide the most accurate representation of the actual pair being offered.
HQaudios Restoration & Testing Process
Before Restoration
Every vintage JBL loudspeaker requires careful inspection before any restoration work begins.
For each pair of JBL 4311 speakers, HQaudios paid particular attention to the condition of the 12-inch woofers, LE5-2 midrange drivers, LE25 tweeters, crossover networks, level controls, input terminals, cabinet structure, and grille assemblies.
Each driver was inspected for physical integrity, proper movement, abnormal noise, and consistent electrical behavior.
The midrange and high-frequency level controls are also checked carefully because these controls are an important part of the original 4311 design.
The crossover network, internal wiring, and input connections are inspected for signs of age, oxidation, loose connections, or other conditions that could affect reliability and sound quality.
During Restoration
Based on the initial inspection, each pair was serviced according to HQaudios’ technical standards with the goal of preserving the original engineering and characteristic sound of the JBL 4311.
The 12-inch woofers were tested for smooth operation, proper output, and abnormal mechanical noise.
The LE5-2 midrange drivers are individually tested to confirm consistent output and proper tonal balance.
The LE25 high-frequency drivers are inspected and tested to ensure clear and stable high-frequency reproduction.
The crossover network was checked for reliable operation and stable signal distribution between the three driver sections.
The midrange and high-frequency level controls are cleaned and verified for smooth adjustment and proper operation.
Input terminals and internal connections are cleaned and checked as part of the restoration process
Components identified as outside acceptable technical standards are addressed during service, followed by final operational testing to verify reliable performance
The cabinets, grilles, badges, and exterior surfaces are carefully cleaned and detailed to preserve the vintage JBL appearance.
After Restoration
After restoration is complete, each speaker underwent comprehensive functional testing under real operating conditions.
Both speakers are tested for full-range output, channel balance, driver operation, and proper response through the low-, mid-, and high-frequency sections.
The level controls are tested throughout their operating range to confirm proper adjustment.
The pair is then connected to a complete audio system for extended listening tests.
Several hours of listening are used to evaluate tonal balance, imaging, dynamics, bass response, midrange clarity, high-frequency performance, and long-term stability.
Only after successfully meeting HQaudios’ inspection and performance standards is this pair approved and prepared for its next owner.
Specifications
| Specification | Details |
|---|---|
| Brand | JBL |
| Model | 4311 |
| Type | Bookshelf / Studio Monitor |
| Configuration | Sold as a Pair |
| System | 3-Way, 3-Speaker, Bass Reflex |
| Woofer | 12 in (300 mm) JBL 2212 Cone Woofer |
| Midrange | 5 in (130 mm) JBL LE5-2 Cone Driver |
| Tweeter | 1.4 in (36 mm) JBL LE25 Direct-Radiator Tweeter |
| Frequency Response | Approx. 45 Hz – 15 kHz ±3 dB |
| Sensitivity | Approx. 91 dB |
| Impedance | 8 Ohms |
| Power Capacity | 75W Continuous Program |
| Crossover Frequencies | 1.5 kHz / 6 kHz |
| Enclosure | Bass Reflex |
| Enclosure Volume | Approx. 42.5 Liters |
| Level Controls | Independent Midrange and High-Frequency Level Controls |
| Dimensions (each) | Approx. 14.2 × 23.6 × 11.8 in (360 × 600 × 300 mm, W × H × D) |
| Weight (each) | Approx. 19 kg / 41.9 lb |
| Finish | Walnut / Textured Gray depending on original version |
| Country of Origin | USA |
| Era | 1970s |
| Condition | Professionally Restored / Fully Tested |
| Warranty | 1-Year HQaudios Warranty |
What Is Included
Pair of JBL 4311 speakers.
Only the items clearly shown in the photographs or specifically listed in the description are included.
Speaker stands shown in the photos are for display purposes only and are not included.
Video Test & Sound Demo
We understand that purchasing vintage professional audio equipment online requires confidence.
If you would like to see this pair in operation before purchasing, please contact us directly
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 4311 is an efficient 8-ohm loudspeaker and works well with a wide range of classic integrated amplifiers, receivers, and dedicated power amplifiers.
JBL System
Integrated Amplifier: JBL SA series or other properly restored JBL electronics.
Sansui System
Integrated Amplifier / Receiver: Sansui AU or G-series models with clean, stable power.
Marantz System
Receiver: Marantz 2230, 2245, 2270, or similar properly restored vintage receivers.
Pioneer System
Receiver / Integrated Amplifier: Pioneer SX-series receivers or SA-series integrated amplifiers.
McIntosh System
A properly restored McIntosh integrated amplifier or receiver can provide an excellent high-end vintage pairing with the JBL 4311.
For the best performance, HQaudios recommends pairing the JBL 4311 with a clean, stable amplifier and using the front-panel midrange and high-frequency controls to optimize the speakers for the listening room.
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 or studio setup?
The JBL 4311 pairs beautifully with professionally restored vintage receivers, integrated amplifiers, turntables, reel-to-reel tape decks, and other classic audio components.
Its compact cabinet size makes the 4311 especially suitable for dedicated listening rooms, studios, offices, and vintage stereo systems where a large floorstanding loudspeaker is not practical.
The classic JBL design also makes the 4311 an excellent choice for collectors building a period-correct 1970s audio system.
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 JBL speakers require careful packing to protect the cabinets, drivers, grilles, and front-panel controls during transportation.
- 12-inch woofers and front baffles protected carefully.
- Midrange and tweeter assemblies protected against impact.
- Front-panel controls protected during packing.
- Cabinet corners and edges reinforced for transportation.
- Protective wrapping applied to the cabinet surfaces.
- Heavy-duty boxing and internal cushioning used where appropriate.
- Tracking information provided after shipment.
- Freight shipping may be used for additional safety depending on destination.
- Local pickup may also be available by appointment.
1-Year HQaudios Warranty
This item is backed by our 1-Year HQaudios Warranty, covering proper functional operation under normal home use.
Our goal is to provide a confident and comfortable buying experience when purchasing professionally restored vintage audio equipment.
If you have any questions after receiving your speakers, please contact us directly. We are here to help.
Warranty does not cover misuse, physical damage, unauthorized repair, modification, damage caused by incorrect voltage or amplifier faults, improper handling, or shipping damage after delivery.
Important Note for Buyers
Vintage speakers are precision audio components. They require proper amplifier matching, careful handling, and appropriate placement to perform at their best.
The JBL 4311 is an efficient 8-ohm loudspeaker, but proper amplifier matching is still recommended for the best sound quality and long-term reliability.
The front-panel midrange and high-frequency controls are part of the original design and can be used to compensate for room acoustics and listening preferences.
Because these are vintage speakers, cosmetic condition, cabinet finish, grille condition, and individual component appearance may vary with age.
We do our best to describe each pair clearly and provide detailed photos so you can buy with confidence.
Please review all photos, read the full description, confirm amplifier compatibility, and contact us with any questions before purchase.
HQaudios – Vintage Audio Restored with Care.
Professionally Restored • Fully Tested • Carefully Packed • 1-Year Warranty
Be the first to review “JBL 4311 Speakers (Pair) – Vintage Control Monitor – Professionally Restored – Fully Tested – 1-Year Warranty”
Related products
-25%
Extra 10% Off
Original price was: $8,699.$6,499Current price is: $6,499. With promotion: $5,849
-
-17%
Original price was: $3,005.$2,499Current price is: $2,499.
-
Recently viewed
You have not viewed any products yet.
Reviews
There are no reviews yet.