The Jnew BL 4309 Studio Monitor is a high-performance bookshelf speaker and is built around the patented JBL 2410H-2 1-inch compression driver mated to a patented High-Definition Imaging (HDI) horn, paired with a 6.5-inch, cast-frame pure-pulp cone woofer. This combination delivers music with levels of authority and accuracy not possible with traditional loudspeaker designs.
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 that helps 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 is incredible dynamics with accurate reproduction and a lack of power compression.
The 4309 enclosure is heavily braced with 3/4-inch thick walls to provide a solid acoustic foundation, and it incorporates a bass reflex design with dual front-firing, computer-optimized flared ports. Dual sets of gold-plated binding posts provide a secure connection and offer a choice of single-ended or bi-wire/bi-amplified connections.
The JBL 4309 is the ideal loudspeaker for the music lover who wants to experience that classic JBL sound from a compact cabinet. Its HDI driver architecture enables the 4309 to deliver an impressive spatial presentation, even in environments where on-axis listening or precise speaker placement could hamper performance. The more-than-generous driver, coupled with its dual ports, delivers room-filling bass — whether these speakers are placed on stands or on a bookshelf.
The cabinet features the renowned JBL studio monitor design and is finished in a choice of walnut or black walnut furniture-grade, satin wood veneers. (See the pull-down menu above to select the wood veneer and grille color.)
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)
Controls: UHF tone control
Input Type: Dual sets of gold-plated binding posts with shorting straps
Dimensions (HWD): 16.5" x 10.25" x 9"
Weight: 24.2 lbs.
Warranty: 5 Years