Description
JBL 4309 6.5-inch 2-way Bookshelf Speakers
The revolutionary High-Definition Imaging horn geometry in the JBL 4309 6.5-inch 2-way Bookshelf Speakers are the result of intense research into the nuances of horn design.
In search of exceptional high-frequency detail and uniform directivity for smooth in-room response, JBL engineers pioneered a design that delivers neutral frequency response both on- and off-axis and provides a seamless transition between the high and low frequency drivers.
The JBL 2410H-2 compression driver benefits from the advanced research and applications derived from JBL Professional’s “D2” range of transducers. At the core of the 2410H-2 device is a lightweight polymer, annular diaphragm that improve high-frequency extension by reducing diaphragm mass. The V-shaped geometry of the annular diaphragm reduces breakup modes, eliminating time smear and reducing distortion.
The Result
The result is incredible dynamics with accurate reproduction and a lack of power compression. An Ultra High-frequency tonal adjuster is located on the front panel below the horn and allows the sound to be tailored to the specific environment and listener preference.
This control works in conjunction with an advanced crossover network design that features air-core inductors, cast wire-wound resistors and low-ESR metallized film capacitors to optimize the performance of the 4309 drive components.
The 4309’s powerful 6.5-inch (165mm) woofer takes advantage of core JBL engineering techniques to ensure very high output with low distortion.
The long-throw voice coil in conjunction with the symmetrical field motor design, flux stabilization ring, and copper shorting ring guarantee maximum output with low distortion. A Pure-pulp cone provides a lightweight, rigid diaphragm and helps to eliminate breakup modes ensuring proper pistonic motion throughout the operating band.
The 4309 enclosure is heavily braced with 3/4-inch (18mm) thick walls to provide a solid acoustic foundation and incorporates a bass reflex design with dual front-firing, computer-optimized flared ports. The cabinet features a classic JBL studio monitor design with a blue baffle and is finished in a choice of Walnut or Black Walnut furniture-grade satin wood veneers.
A blue (Walnut) or black (Black Walnut) cloth grille completes the elegant appearance. Dual sets of goldplated binding posts provide a secure connection and offer a choice of single-ended or bi-wire/bi-amplified connections.
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Features
- Patented 2410H-2 1″ (25mm) compression driver with High Definition Imaging ™ geometry horn.
- 6.5-inch (165mm) pure-pulp cone woofer in bass-reflex design with dual front-firing tuned ports.
- Choice of Satin Walnut or Black Walnut furniture-grade satin wood veneers.
Specifications
- Type: 2-way bookshelf loudspeaker
- Low Frequency Driver: 6.5″ (165mm) Pure Pulp cone woofer
- High Frequency Driver: 2410H-2 1-inch (25mm) annular ring, Teonex® diaphragm compression driver with advanced HDI™ geometry horn
- Recommended Amplifier Power: 25 – 150 WRMS
- Impedance: 4 Ohm
- Loudspeaker Sensitivity: 87 dB/2.83V/1m
- Frequency Response: 42 Hz – 30 kHz (-6 dB)
- Coverage Angle, -6 dB: 100 Degrees Hor. x 80 Degrees Ver., from 2kHz to 17kHz
- Crossover Frequency: 1.6 kHz
- Enclosure Type: H-braced front-ported bookshelf
- Grille Feature: Monitor style to match horn mating features, supplied in dark blue (with walnut cabinet) and black (with black cabinet)
- Dimensions with grille: 419 mm H x 260 mm W x 227 mm D
- Controls: UHF tone control
- Input Type: Dual sets of gold-plated binding posts with shorting straps
- Product Weight (Each): 10.98 kg
- Shipping Weight: 25.5 kg
- Shipping Units of Measure: Pair
- Warranty: 5 Years
- Recommended stand height: 24” (609 mm)
