Summit Audio TD-100 Instrument Preamplifier and D.I. - Manual (Page 3)

Model TD-100 Tube Direct Box 3
Front Panel
Front Panel
Ground Lift Switch
This two-position switch removes the third prong of the
power cable from the circuit. Lifting the ground can some-
times reduce the hum caused by a ground loop in your audio
system.
Polarity Switch
This switch changes the polarity of the outgoing signal.
Direct Instrument Output
This jack mirrors the instrument input. Plug your instrument
into the input and run a line from this ouput to the input on
your amplifier. This output is not affected by the Loading
control.
Instrument Input
Input for your bass, guitar, keyboard or other instrument.
The maximum input level is +24dB.
SIGNAL DRIVE
0 24
1M
10K 2M
LOADING INPUT DIRECT OUT
OUTPUT GAIN
SIGNAL
GROUND LIFT
POLARITY
+ - ON OFF
INSTRUMENT PRE-AMP
TD-100
TUBE DIRECT