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Russound A-SZ4 - A-BUS Subzone The Russound A-SZ4 is an optional A-BUS subzone chassis designed for C-Series Multizone Audio systems. It allows you to add four assignable subzones with independent power and volume control, sharing the same audio source. Each C-Series Multizone Controller supports up to two A-SZ4 subzone units, expanding your audio system's flexibility. Key Features Seamless integration with C-Series Multizone Controllers Adds 4 A-BUS subzones per controller Supports up to two subzone modules per controller Assignable subzones with independent power and volume control Multiple mounting options: shelf, wall, single or dual rack installation Compact half-rack size complements C-Series Controllers, ST1 Tuner, and D250LS amplifier Specifications Shipping Dimensions 12.8" (W) x 5.0" (H) x 11.5" (D) (32.4 x 12.7 x 29.2 cm) Shipping Weight 6.4 lbs (2.9 kg) Audio Input 4 Audio Input Impedance 47K Ω Frequency Response 20Hz - 20kHz ± 0.1 dB Fuse Rating (2) TL250V/125V 2A Keypad Outputs (4) RJ45 / T568A - 150' max cable length Power Supply 110-240 VAC @ 50-60 Hz, 50W (Auto-select) Product Dimensions 10.5" (W) x 1.8" (H) x 8.5" (D) (26.7 x 4.4 x 21.6 cm) RNET A/V Connector (2) RJ45 / T568A - 150' max cable length Signal to Noise Ratio 105 dB A-weighted Total Harmonic Distortion