Summit Audio TPA-200B Dual Tube Mic/Line Preamp - Manual (Page 3)

THE CONTROLS
1. LINE/MIC: Selects between the balanced XLR mic input and the balanced ¼” TRS
line input on the back of the TPA-200B.
2. PAD: Switches the pad between off, -15dB and –25dB if the output gain of the
microphone or line input has too much gain and is overdriving the input of
the TPA-200B.
3. PHASE
REVERSE:
This switches the polarity or phase on the microphone input and line input
from normal to 180 degrees out of phase.
4. INPUT
GAIN:
This completely variable potentiometer changes the input gain for the
TPA-200B. Use in conjunction with the output gain to get the desired
amount of tube saturation in the signal. Turning the output gain down and
the input gain up increases the amount of tube distortion.
5. OUTPUT
GAIN:
This completely variable potentiometer changes the output gain for the
TPA-200B. Use in conjunction with the input gain to get the desired
amount of tube saturation in the signal. Turning the output gain up and the
input gain down decreases the amount of tube and will give you the
cleanest possible sound.
6. OL/OD
INDICATORS:
.These LEDs will light to indicate overdrive (OD, amber light) when the
tube is working at it’s optimum level and overload (OL, red light) when
the tube is being distorted.
7. HI-Z INPUT: This is an unbalanced, high impedance input for musical instruments such
as guitar, bass, and keyboards. (Try plugging in an electric guitar, turning
the output gain low and the input gain high to get a great tube distortion.)
8. PHANTOM
POWER:
Switches on +48V phantom power for BOTH microphone inputs for use
with condenser microphones.
9. POWER: Switches the TPA-200B on and off, indicated by the red light above the
phantom power switch.