ตู้ลำโพง ยี่ห้อ JBL รุ่น JRX212D

The JRX212 from JBL is a two-way 12″ loudspeaker system. It is suitable for live sound and speech reinforcement applications, and can also be used for monitoring on stage. It features a 2.5″ voice coil and a 1″ compression driver, as well as a frequency range of 60 Hz to 20 kHz.

Its high-frequency driver is protected by a SonicGuard system, while the speaker’s overall MDF construction allows for both durability and a suitable low-frequency response. With its non-resonant steel handles, the 43 lb speaker is easier to move around than if it had no handles at all. For connections, this loudspeaker sports 1/4″ TS and Neutrik SpeakON terminations.

Features:

• JBL 12 in low frequency driver with a 64 mm (2.5 in) diameter edgewound ribbon voice coil which provides more cross-sectional wire area in the voice coil gap than round wire designs, for greater efficiency and power handling.
• JBL 2414H-C 25 mm (1 in) polymer diaphragm compression driver improves high frequency performance as well as system reliability.
• The advanced network topology crossover design shapes frequency response and delivers “coherent summation” in the crossover region.
• High-voltage capacitors and inductors with massive cores and heavy gauge wire enable the crossover network to handle high power without saturating.
• Progressive Transition™ high frequency waveguide provides superior coverage control, reduced distortion, and smoother frequency response.
• The rugged, acoustically superior enclosure is constructed from 19 mm (.75 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for extreme durability and improved low-frequency performance.
• SonicGuard™ protects the high frequency driver from excess power without interrupting the performance.
• Non-resonant, all-steel handles are used.
• Attractive 18-gauge hexagon perforated, steel grille protects components from damage.
• Dual-angle pole-mount socket allows the speaker to tilt 10°for more uniform audience coverage.

Specifications

• Power Rating :    250 / 1,000 W
• Frequency Range:    At -10 dB : 60 Hz to 20 kHz
• Frequency Response :     At ±3 dB : 70 Hz to 19 kHz
• Sensitivity  :    99 dB SPL (1 W / 1 m) (@1m)
• Nominal Impedance  :     8 Ω
• Amplifier Power   :     250 to 500 W into 8 Ω
• Maximum SPL :   129 dB
• Nominal :    Dispersion: 90 x 50º
• Crossover Frequency  :   1.8 kHz
• High Frequency Driver:   JBL 2414H-C 1″ (25 mm) polymer diaphragm compression driver mounted on Progressive Transition Waveguide
• Low Frequency Driver:    JBL M112-8
• Input Connectors :    1 x Neutrik Speakon NL-4; 0.25″ (6.35 mm)  1 x TS phone jack; parallel
• Dimensions (H x W x D) :  23.0 x 15.7 x 12.8″ (584.0 x 399.0 x 325.0 mm)
• Weight :  43.0 lb (19.5 kg)