JBL 4309 6.5-inch 2-way Bookshelf Loudspeaker Pair with Rega Brio Integrated Amplifier Bundle
STANDS NOT INCLUDED
THIS BUNDLE INCLUDES:
1 PAIR JBL 4309 6.5" 2-Way Bookshelf Speakers Black Walnut with Black Grills
1 Rega Brio Integrated Amplifier
JBL 4309
The JBL 4309 Studio Monitor is a compact, high-performance bookshelf loudspeaker built around the patented JBL 2410H-2 1-inch compression driver mated to patented High-Definition Imaging (HDI™) horn, paired with a 6.5-inch, cast-frame Pure-pulp cone woofer. This combination delivers music with authority and accuracy not possible with traditional loudspeaker designs. 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.
4309 Highlights
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Patented High-Definition Imaging (HDI™) horn
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Patented 2410H-2 1-inch (25mm) high-frequency compression driver
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6.5-inch (165mm) cast frame, Pure-pulp cone woofer with 1.5-inch voice coil
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Classic Studio Monitor design with premium finishes including satin Walnut wood veneer with blue grille or satin Black Walnut wood veneer with black grille
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 2-way design with patented High-Definition Imaging (HDI™) horn technology, the patented 2410H-2 1-inch (25mm) compression driver, and a 6.5-inch (165mm) cast-frame, Pure-pulp cone woofer for powerful dynamics and incredibly accurate sound reproduction.
JBL’s revolutionary High-Definition Imaging 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 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 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 gold-plated binding posts provide a secure connection and offer a choice of single-ended or bi-wire/bi-amplified connections.
Rega Brio
The Brio has a completely new case to house its improved circuits and parts. It now sits in a fully aluminum two-part case which boosts the Brio s heat sinking capabilities and improves on Rega's already solid build quality and reliability. The new Brio has a cleverly integrated headphone socket specially designed to avoid interference with the audio circuit when not in use and as you would expect, a very high specification moving magnet phono stage is built in as standard.
Throughout the design process the Brio has been meticulously improved in every aspect, from the quality of materials to the manufacturing process, to make this new Brio a step ahead in Rega s engineering and design for amplifiers.
Brand new case design.
The sleek and minimal look was designed to bring elegance to Rega's classic style but still harks back to the swooped features hidden away in Rega's past amplifiers. Combining all these aspects makes this Brio case a unique standpoint amongst the competition.
Re-designed circuit.
Key improvements have been made to the circuits. The PCB layout has been fully upgraded to handle higher specifications for all critical parts. A second raw power supply has been added to provide further isolation between output stage and the driver stage/line and phono amplifiers. This improves the isolation between high and low level signal stages of the amplifier. Higher specification MUSES operational amplifiers have been used in the line and phono amplifier.
Headphone Socket.
For convenience, the Brio has the capability to drive standard hi-fi headphones from the internal amplifier. Adding a headphone socket was only possible by finding a way to reduce its impact on the main signal path so it doesn't disrupt the overall sound quality. We have paid special attention to the switch that deactivates the main speakers.
Specs
JBL 4309 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 16.5” H x 10.25” W x 9” D (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) 24.2 lbs. (10.98 kg)
Shipping Weight 56.2 lbs. (25.5 kg)
Shipping Units of Measure Pair
Warranty 5 Years
Recommended stand height 24” (609 mm)
Rega Brio Specifications:
Specifications
Input sensitivities for rated output level:
Input 1 (phono) input sensitivity = 2.1mV at 47K in parallel with 220pF.
Maximum Input 1 (phono) input level = 100mV
Input 2-5 (line) input sensitivity = 210mV at 47k
Maximum input 2-5 (line) input level = 10.25V
Power outputs at 230/115V supply voltage:
50 Watts RMS both channels driven into the rated load of 8
58 Watts RMS one channel driven into the rated load of 8
73 Watts RMS both channels driven into the rated load of 4
93 Watts RMS one channel driven into the rated load of 4
Continued high level use into 4 may cause the case to exceed 40 C above the ambient temperature.
Headphone output:
No load = 8V
32 = 1.8V
54 = 2.6V
300 = 5.9V
Source impedance = 109
Power consumption:
195 Watts at 230V/220V/115V/100V into the rated load of 8
Record output level:Record output level (with rated input levels) = 210Mv.
Record output impedance = 470
Frequency response:
Phono 15Hz to 40KHz (-3dB Points) / 27Hz to 20.5KHz (-1dB Points)
RIAA accuracy (100Hz to 10KHz) 0.4dB typically better than 0.3dB
Line 12Hz (-1dB points) to 43KHz (-3dB points)
Remote control batteries included 2 x AAA Alkaline.
Fuse ratings:
T2AL 250V - 230V/50Hz and 220V/60Hz
T3.15AL 250V - 115V/60Hz and 100V 50/60Hz
Dimensions:
345mm (D) -inc volume control x 216mm (W) x 78mm (H)
Weight:
5.1kg
