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New BX5a Reference Monitors from M-Audio

May 31, 2005
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Like their predecessors, the BX5a monitors pack lot of punch for their size. The 5" low-frequency driver cone is crafted from Kevlar, in contrast to the polypropylene used in the original BX5. Kevlar is the same material used in bulletproof vests, and its high resilience makes it ideal for use in speaker cones according to the company--although it is typically reserved for monitors with higher price tags than the BX5a. These low-frequency drivers also employ a curved cone design, and high-temperature voice coils and damped rubber surrounds deliver amazing fidelity and durability. The natural silk domes of the 1" high-frequency drivers deliver top end.

The integral design of the BX5a cabinet and circuitry yields an increase in bass response over the original BX5. Tuned crossovers combine with 70 watts of bi-amped power (40 watts for low frequencies, 30 watts for high frequencies) to round out the pair of reference monitors that are still small enough to fit just about anywhere. Magnetic shielding makes them suitable for desktop use. The units also have a power indicator and volume control.

Specifications for the BX5a include 56Hz-22kHz frequency response, 3kHz crossover frequency, greater than 100dB dynamic range (typical, A-weighted), input impedance of 20k ohms balanced (10k ohms unbalanced) and input sensitivity of 90dBA SPL at 1 meter with 85 mV pink noise input (volume control at maximum). The BX5a is factory programmed for either 115V ~50/60Hz or 230V~50/60Hz. Protective features include RF interference, output current limiting, over temperature, turn-on/off transient, subsonic filter, and external mains fuse. Dimensions are 9.85 in. (h) x 6.54 in. (w) x 7.88 in. (d); weight is 11 lbs/unit.

For more information, visit their web site at www.m-audio.com.

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