Owner manual

SM Pro Audio Page 6 of 15 PASSIVE-1 manual
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4 CONNECTIONS (rear panel)
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4.1 Mains Power
The PASSIVE-1 includes a 9V mains power supply. Power to the PASSIVE-1 is
only required if you wish to use the headphone amplifiers or talkback features.
The power LED on the front panel (to the left of the volume knob) will illuminate
when the external power supply is connected and mains power is present.
Note: Mains power is not required for the audio signal path. All passive
attenuation functions operate fully without the connection of the power supply.
This enables full portable use of the PASSIVE-1 without restriction.
Please make sure your mains voltage is compatible with the provided adaptor.
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4.2 Sources (Inputs)
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Sources is the description of the 4 input connectors.
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Source A is the stereo RCA inputs
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Sources B and C are the 6.5mm or ¼ inch stereo input jacks
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Source D is the USB input. The USB input has a built in Legacy compatible driver for simple
plug & play operation. The USB input does not need mains power to operate. An ASIO
driver is also available for download from our website.
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