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AudioControl Rialto 400 - Compact Amplifier and DAC The AudioControl Rialto 400 is a powerful 2.1 channel compact amplifier with a built-in audiophile-grade digital-to-analog converter (DAC). Designed for superior sound quality and compatibility with voice-enabled devices like Amazon Echo® and Google Home®, it delivers exceptional performance for home theatre and media systems. This updated Rialto 400 offers over 100 watts per channel into 8 ohms and 200 watts per channel into 4 ohms, and can be bridged to a 400 watt mono-block. Featuring a high-performance Wolfson® DAC, it enhances digital and analog audio sources including Apple TV, Pandora®, Spotify®, and Sonos® systems for clearer, more accurate sound reproduction. Engineered and manufactured in the Pacific Northwest USA, the Rialto 400 combines compact size with audiophile-quality sound and comes backed by AudioControl’s renowned 5-year warranty. Key Features Compact 2.1 channel amplifier with built-in audiophile-grade Wolfson® DAC 100W per channel at 8Ω, 200W per channel at 4Ω Bridgeable mono-block delivering 400W output Ultra-fast signal-sense switching with priority input for voice-enabled devices Digital inputs: Optical Toslink and Coaxial S/PDIF Analog inputs: Stereo RCA, speaker level, and 3.5mm (1/8 inch) Subwoofer output and headphone output AudioControl patented AccuBASS® bass response 12V trigger output for system integration Compact dimensions: 216mm W x 138mm D x 74mm H Specifications Inputs Digital: Optical Toslink, Coax S/PDIF 75Ω Analog: Stereo RCA, Stereo speaker level, 3.5mm (1/8 inch) Input sensitivity: 230mV (RCA), 2.0V (speaker level) Signal sense trigger minimum: 10mV (RCA), 100mV (speaker level) Outputs Amplifier channels: 2 Power output: 100W per channel (8Ω), 200W per channel (4Ω) Minimum speaker load: 4Ω Preamp outputs: Mono RCA subwoofer, mono RCA bridged Performance Signal-to-noise ratio: >95dB Frequency response: 20Hz – 20kHz Total harmonic distortion: 0.09% Control 12 Volt trigger outputs: 1 General Power consumption (typical): 40W Power consumption (maximum): 520W BTU/hour heat dissipation (standby): 5.5 BTU/hour heat dissipation (idle): 85.3 BTU/hour heat dissipation (1/8 power, loud listening level) 4Ω: 109.2 BTU/hour heat dissipation (1/8 power, loud listening level) 8Ω: 92.1 BTU/hour heat dissipation (full power) 4Ω: 426.6 BTU/hour heat dissipation (full power) 8Ω: 173.3 Line voltage: 100-120VAC / 200-240VAC switchable Weights & Dimensions Dimensions: 216mm W x 138mm D x 74mm H (8.5” W x 5.4” D x 2.9” H) Weight: 2.7kg (6.0 lbs) What's in the Box AudioControl Rialto 400 amplifier and DAC Power cord User manual Warranty information