The Sennheiser EM-XSW 1 DUAL-B (article 508278) is a two-channel rack receiver from the XS Wireless 1 range, operating in the B frequency range of 614 to 638 MHz. It lets two XSW 1 handheld or bodypack transmitters run from one compact unit, which suits small bands, churches, schools and conference rooms that need two wireless microphones. Each channel is a double-superheterodyne receiver with antenna-switching diversity via internal antennas, with eight frequency banks of up to ten factory-preset channels and 2.4 GHz synchronisation with the transmitters. Audio response is 50 Hz to 16 kHz, and each channel has its own balanced XLR output (+12 dBu) and unbalanced 6.3 mm jack output (+6 dBu), plus a switchable 20 dB line/mic level. The receiver has a rugged ABS housing measuring about 320 x 42 x 127 mm and weighs about 610 g. It is supplied with the NT 12-5 CW power supply (12 V DC). Sennheiser covers it with a two-year warranty.