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Top Rear Panel
INPUTS (5)
Two input channels are provided. The line-level input is of the medium impedance balanced type. The jack is a
combo female XLR and 1/4" TRS connector. Sensitivity of this input is 0.42 volts for full output, when the MIC/
LINE switch (7) is in the LINE position. Channel 2 has a 3.5 mm input jack for mobile device signal sources.
GAIN CONTROLS (6), Present on both input Ch 1 and input Ch 2
Controls the gain or output level of the same numbered input channel. It is used to directly set the system output
level for a given input signal.
MIC/LINE switch (7), Present on both input Ch 1 and input Ch 2
Switches between LINE level gain (out position) and MIC level gain (in position). MIC position increases gain
26 dB to allow use of most dynamic microphones.
NOTE: Phantom power is not supplied on the INPUT (5) jacks
Gnd LIFT switch (8)
Allows the shield to be disconnected from the chassis ground to alleviate hum from ground loops
DIRECT THRU output jack (9)
This jack is intended for the use of linking multiple SP®218P Sub's in a line, or to provide a feed to a powered
subwoofer, or other electronics that needs to receive a full range version of the input signal.
DIR/MIX switch (10)
Switches between Direct Thru from channel 1 input, or a mix of channel 1 and channel 2 at the Direct Thru out-
put (9)
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