BOSE B1500 เครื่องขยายเสียง Power amplifiers 2 x 750W เพาเวอร์แอมป์

The B Series high performance power amplifiers are designed for use in a variety of applications in the fixed installation market where sonic quality is the highest priority. The B1500, at 750W per channel respectively, bring the well renowned MC2 sound quality and reliability to a wide range of users.

Overview

Building on the MC2 commitment to sound quality and reliability, these exciting amplifiers have been designed with complementary AB bipolar outputs, using the unique MC2 current driven floating drive stage and conventional analogue level controls. The sound quality is maintained over a very wide range of load and temperature conditions.

Sophisticated side chain limiters prevent distortion and speaker damage but are out-of-circuit until the onset of clipping. The control circuitry provides full protection against short circuits, DC and excessive temperature together with inrush current limiting and delayed turn on . All adding up to genuine state of the art amplifiers.

• Complementary class A/B bipolar outputs, using the unique MC2 current driven floating drive stage, which gives one of the cleanest sounds available.
• Sophisticated monitoring of amplifier temperature and load conditions.
• Proprietary control and protection circuitry continuously checks for all fault conditions such as shorted outputs,
• DC on outputs, excessive temperature (blocked air flow), component failure etc… and disconnects the outputs, if such an event occurs.
• Low noise vari-speed fans.
• Side-chain clip limiter prevents speaker damage from clipped signals but only comes into the signal path during limiting and is inaudible during normal operation.
• Audio fade-up on Power-on.
• Optional internal crossover cards available.
• Proprietary Ultra Cool heatsink.
•  Full mains inrush protection.

      The B1500 or B2000 Amplifier is a no compromise, high quality, class AB power amplifier. Fan speed is varied as required to keep the amplifier within its temperature limits. Signal limiters are included to protect speakers from clipped signals. The amplifiers include full DC and short circuit protection on the outputs to ensure trouble-free service in harsher environments.

The B1500 & B2000 amplifiers are a good power match for BOSE mid/high and bass loudspeaker products, especially in foreground entertainment systems. The B1500 amplifier is rated at 450 watts per channel 8 ohms and 715 watts per Channel into 4 ohms and 1025 watts per channel into 2 ohms. In bridged mono operation, it is rated at 1430 watts into 8 ohms and 2050 watts into 4 ohms. The B2000 amplifier is rated at 560 watts per channel 8 ohms and 925 watts per Channel into 4 ohms and 1300 watts per channel into 2 ohms. In bridged mono operation, it is rated at 1850 watts into 8 ohms and 2600 watts into 4 ohms. The inputs of each amplifier are high quality, electronically balanced and have high common-mode rejection for exceptional hum and noise rejection. In addition, both the B1500 and the B2000 amplifiers are equipped with internal connectors that enable the use of BOSE Equalisation cards (EQ cards) one for each channel. This allows for different equalisation for each channel if required (provided the correct equalisation cards are installed). Equalisation cards are available for the entire range of BOSE professional loudspeakers that require dedicated product equalisation. A sample setup might involve one B1500 power amplifier driving two channels of BOSE 802 III loudspeakers in stereo mode. A second Model B1500 power amplifier in bridged mono mode could be added to drive a BOSE 502B bass module. Alternatively, just one amplifier could be used to drive the BOSE 802 III loudspeakers on one channel and the BOSE 502B module on the other channel. Many configurations are possible. This flexibility can be achieved by installing the EQ cards for the desired setup.

 Spesification

Output Power    (Watts RMS) per channel
8 ohms @ 1kHz                                     450
4 ohms @ 1kHz                                     750
2 ohms @ 1kHz                                     1125

Mono Bridged
8 ohms @ 1kHz                                     1500
4 ohms @ 1kHz                                     2250

THD @ Rated Power 4 ohms
1 kHz                                                 <0.008%
20Hz-20 kHz                                       <0.03%

Input CMRR                                       >90 dB

Hum & Noise                                     -105 dB

Gain                                                    32 dB

Sensitivity for rated output, 4 ohms         +5 dBu (1.38v)

Damping Factor 1 kHz, 8 ohms                 >400

Frequency response                               20Hz-20kHz
                                                                +0/-0.5 dB

Input impedance

(actively balanced)                                20k ohms

Dimensions - 2U (mm)                        88 x 482 x 428

Weight                                                20kgs

Power requirement                            230 VAC @

                                                           10 amps max

                                                           115 VAC @

                                                           20 amps max