JBL 3678 SCREEN THX 300W-passive , 600+50W-biamp 2way

The JBL 3678 cinema loudspeaker system provides natural sound quality for music and dialog in small cinema applications. It can be used in either a passive mode, using its built-in network, or in a bi-amplified system.  Enclosure design is extremely shallow in depth (292 mm; 11.5 inches), to minimize the space required behind the screen.

The high-frequency section consists of the JBL 2426 pure titanium compression driver and 2342 Bi-Radial horn. The titanium diaphragm of the 2426 ensures the natural sound and reliability mandatory in todayʼs motion picture theatres. The 2342 horn provides smooth, even coverage throughout the auditorium.

The low frequency section uses a single JBL 2226H driver. This 600 watt driver features JBL-patented Symmetrical Field Geometry (SFG) and Vented Gap CoolingTM technology for high power handling with minimal power compression.

The newly-designed passive crossover network is optimized to provide seamless transition between driver components, for clear, articulate dialog, and high fidelity music reproduction. Operation in a bi-amplified system is easily achieved by simple re-configuration of the jumper connectors at the network/connector panel.

In bi-amplified mode, the 3678 is THX-approved for THX certified theatres no larger than 1,274 cubic meters (45,000 cubic feet) and screen-to-last row distances no greater than 12.2 m (40 ft.).

Key Features:

• Low Frequency Transducer: One 380 mm (15“) low frequency driver
• High Frequency Transducer: 25 mm (1“) horn throat diameter, 44 mm (1.75“)
  pure titanium diaphragm compression driver
• Flat power response 100° x 100° Bi-Radial® horn
• Operable in bi-amp or passive mode
• Includes adjustable bracket for horn aiming
• Shallow profile cabinet minimizes behind-screen space requirements
• THX®-approved for THX system installations (bi-amplified only.)

Specifications:

• Frequency Range: 30 Hz to 20 kHz (-10 dB)
• Frequency Response: 45 Hz to 12 kHz (+/-3 dB)
• Power Capacity (Continuous Pink Noise): 300 Watts Passive
• HF: 50 Watts Bi-Amp
• LF: 600 Watts Bi-Amp
• Sensitivity: 98 dB (1W, 1m)
• Nominal Impedance: 8 Ohms
• Crossover Frequency: 1 kHz
• Nominal Coverage: 90° Horizontal, 90°Vertical
• Half-Space Reference Efficiency: 3.3%
• Maximum Acoustic Power Output:  8 Acoustic Watts (Sine Wave Input)
• System Polarity: Positive Voltage to RED produces forward cone motion
• Input Connectors: Barrier Strip Screw Terminals
• Dimensions (HxWxD): 1019 (w/horn) x 651 x 292 mm
  (40.125 (w/horn) x 25.625 x 11.5 in)
• Net Weight: 41 kg (90 lbs)

The JBL 4645C is a single 460 mm (18 in) high power subwoofer. It is approved by Lucasfilm Ltd. for THX� system installations.

Subwoofer 2x18 2241H, 1200W AES, 4Ω, 100dBSPL/1W/1M, 22Hz-3dB με EQ και γρίλλια. Εγκεκριμένο από την lucasfilm LTD., για THX. (762H x 1219W x 610D mm). 98kg.

Single 460 mm (18 in) High Power Subwoofer.
Approved by Lucasfilm, Ltd. for THX® system installations.