When it comes to bookshelf speakers, JBL proves that you don’t have to sacrifice audio quality to get a cabinet that fits gracefully into almost any décor. The JBL 4309 Studio Monitor packs a powerful punch, but it’s only 16.5 inches tall and weighs just over 24 pounds. This compact, high-performance bookshelf speaker 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.
For more than 70 years, JBL has been providing audio equipment for concert halls, recording studios, and movie theaters around the world and has become the trusted choice of leading recording artists and sound engineers. The exquisite 4309 Studio Monitor allows you to have that classic JBL sound in your home. Many music lovers are so devoted to JBL that they wouldn’t even consider buying another brand of loudspeaker.
Designed and engineered in JBL’s world-famous acoustic engineering facility in Northridge, California, the 4309 Studio Monitor is a showcase of patented JBL acoustics technologies. This bookshelf loudspeaker features a two-way design that reproduces music with pristine clarity and class-leading authority. JBL’s revolutionary HDI horn geometry is 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’s team of 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 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.