The PS-704 is a four-channel, single rack-space intercom power supply that features Clear-Coms “fail-safe” design for maximum reliability. The power supply delivers 1.2 amps at 30 volts, supplying power for one to four channels of intercom. It will support up to 40 beltpacks, 10 speaker stations or 12 headset stations.Technical Specifications Program Line InputMaximum Level before Clipping: >= 20dBuInput Impedance: >= 5KFrequency ResponseProgram Input – Party-line: 200 – 20KHz 3dBMax DistortionProgram Input – Party-line : <= 0.2%NoiseProgram Mic Input - Party-line:< -70dBuMax GainProgram Input - Party-line: >= -16dBMin GainProgram Input – Party-line: <= -20dBMains PowerInput Voltage Range: 100 - 240 VACInput Frequency Range: 50 - 60 HzInput Power : <= 60 VACOutput Voltage: 30 VDC 0.5VOutput Current per Channel (Continuous): 1.2 AOutput Current per Channel (Peak): 2 A (Do not exceed the 1.2A rating for more than 2 seconds per 1 minute period) Short Circuit Recovery Time (1st short): <= 0.5 secShort Circuit Recovery Time: >= 20 shorts in 20sec) <= 20 secStation CapacityUp to 40 RS-601 beltpacks or 10 speaker stations or 12 headset stations distributed over both channelsRear Panel ConnectorsIntercom: (8) XLR-3M (2 per channel)Program: (1) XLR-3FAC Power: IEC 320 connectorRear Panel Controls(4) Termination On-Off switches(1) Volume controlFront Panel Controls & Indicators(4) Program switch(4) Send level controls(4) Overload LEDs(1) Power indicator LED(1) Power switchEnvironmental32 - 122F (0 - 50C)Dimensions19 in. W x 1.75 in. H x 7.5 in. D(483 mm x 44 mm x 190 mm)Weight6.16 lbs. (2.80 kg)