The Rolls MA2355 is a single rack space stereo mixer amplifier designed for small installation applications. It provides a compact and efficient way to mix up to three sources such as AM/FM tuners, CD players, and video players with up to two microphones. Priority talkover is provided on Microphone One for paging, and on Source Three for a jukebox, telephone, etc. The power amplifier provides 35 Watts of power per channel connected to 8-ohm speakers.Note: The front panel acts as a heat sink for this unit and may get hot under a heavy load. Two Microphone inputs with phantom power Tone controls for each Mic input Three stereo Source inputs Direct access to the power amp section Bass and Treble controls on Sources Two and Three Priority ducking on Mic Two and Source One Dual pre-master level Record Output Fault protected power amp Spring-loaded output terminals Clip indication FR4 Double-sided epoxy circuit board Socketed ICs Made in the U.S.A. Input Impedance: Mic: 600 Ohms XLR balanced; Source: 22K Ohms RCA; Insert: 22K Ohms 1/4″ TS unbalanced Max Input Level: Mic: -14 dBV Mic level Max; Source: 24 dBV; Insert: + 20 dB Connectors: (2) XLR, (6) Stereo RCA, (3) 1/4″ TRS, (1) 1/4″ TS Phantom Power: +12 VDC Max Gain: Mic: 60 dB; Source: 26 dB Tone Controls: +/-12 dB 100 Hz Bass, +/-12 dB 11kHz Treble Noise Floor: – 80 dB S/N Ratio: 96 dB Priority Attenuation: 60 dB Recommended Load: 8 Ohms / Channel Frequency Response: 20Hz to 20 kHz Size: (W x H x D): 19″ x 1.75″ x 5″ Weight: 5.5 lbs