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A solid wireless system that's easy to use.
Sabine recently introduced the 2.4 GHz SWM7000 Series Smart Spectrum True Mobility Wireless System, which is available with combinations of various elements. The kit that I reviewed shipped with the SW72-NDR 2-channel receiver, the SW70-HD5 handheld microphone/transmitter, the SW70-T belt-pack transmitter, and the SVT70BW-TA4 headset microphone. This is a high-quality system that yields clear, wide-bandwidth audio at distances of up to 100 meters, if line of sight is possible. Sabine is one of a number of manufacturers abandoning the 900 MHz band for the less crowded 2.4 GHz domain, and it cites a list of seven "challenges" as the underlying philosophy for the development of this new system. The challenges reflect such issues as available spectrum, transmission/reception reliability, battery failure, feedback issues inherent to wireless mics, governmental regulations, fidelity and frequency response, and limited interchangeability of proprietary technology.
MEETING THE CHALLENGES
Over the years, wireless manufacturers have continually increased the carrier frequency of their systems. The recent breakthrough into the 2.4 GHz band has two positive effects; the below 1 GHz bands are earmarked for high-power RF, and above 2.4 GHz is restricted to low-power applications, thus inherently reducing interference. The other advantage is more bandwidth, enabling more simultaneous channels. The 2.4 GHz band is also approved for use internationally, solving problems for overseas tours. The use of the higher band contends with Sabine's first two challenges (and fifth challenge, as well.) The issue of battery failure is met with Sabine's Tireless Wireless, the use of nickel-metal-hydride rechargeable batteries, which are charged right inside the units, obviating the need to remove, recharge, and replace. Sabine's challenge of feedback is combated with some pretty slick digital signal processing (DSP) that I'll discuss in greater depth momentarily. The issue of fidelity is met to a certain extent by the use of the higher carrier frequency but also by forward strides in the design and components. Finally, Sabine's proprietary technology issue alludes to the preference of artists for certain "classic" or "standard" microphone products. The SWM7000 series allows emulation of a handful of popular live sound mics that artists, engineers, and tour managers prefer. Sabine has definitely put some thought and...