User Manual
15
English
Rear View – connectors
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 1
 L/MONO and RIGHT – Circuit’s main audio outputs on two ¼” TS jack sockets. Max. output 
level is +5.3 dBu (+/-1.5 dBu). With no plug in the RIGHT socket, the L/MONO socket carries 
a mono mix of L and R channels. The internal speaker is muted when a plug is inserted into 
either of the main output sockets.
 2
 MIDI IN and OUT – MIDI connectors on two 3.5 mm TRS jack sockets. Use the break-out 
cables supplied to convert these to the industry-standard 5-pin DIN sockets.
 3
   – USB 2.0 port using a Type B socket. A Type B-to-Type A cable is supplied with the 
unit. The port is MIDI class compliant; connect to computers and other devices supporting MIDI 
via USB to transmit and receive MIDI data. Also used for rmware updates. NOTE – Circuit’s 
USB port does not carry either DC power or audio.
 4
   (DC input) – connect the AC adaptor supplied to this coaxial socket.
 5
 POWER – “soft” on/off switch; to prevent inadvertent power up/down, a press of approx. one 
second is needed to turn the unit on or off.










