Samson Acoustic 用户手册

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ENGLISH

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1.    ACTIVE Input - 1/4-inch phone jack for connecting active inputs.  Use this input if your gui-

tar pick-up uses a battery.

2.    PIEZO (Passive) Input - 1/4-inch phone jack for connecting passive inputs.  Use this input if 

your guitar pick-up does not use a battery.

3.   GAIN (Channel 1) - Control knob is used to control the overall level of the Channel 1 input.
4.    BASS - Controls the amount of bass, or low frequency,  applied to the input connected to  

channel 1.

5.   PHASE - Used to reverse the input signal polarity.
6.    TREBLE - Controls the amount of treble, or high frequency, applied to the input connected 

to  channel 1.

7.   EFX (Channel 1) - Used to add effects to the signal connected to the Channel 1 input. 
8.    MIC Input - XLR input connector for connecting to Channel 1’s low-noise Microphone Pre-

amp, with Phantom power available for condenser microphones.

9.    LINE Input - RCA inputs for connecting an external line level signal like that from a CD, MP3 

player or sound card.

10.   GAIN (Channel 2) - Control knob is used to control the overall level of the Channel 2 input.
11.  EFX (Channel 2) -Used to add effects to the signal connected to the Channel 2 input. 
12.  FREQUENCY (Notch Filter) - Used to set the center frequency for the Notch Filter.
13.    DEPTH (Notch Filter) - Control Knob used to control the amount of attenuation applied by 

the Notch Filter. 

14.   GRAPHIC EQUALIZER – These sliders allow you to “draw” the tonal response of the system 

by adding 12 dB of boost or attenuation to seven different narrow-band frequency areas 

(100Hz, 315Hz, 1kHz, 3.5kHz and 10kHz.) affecting the main output signal of the AC75 or 

AC150.  When a slider is at its center detented (“0”) position, the selected frequency area is 

unaffected (it is said to be flat).  When a slider is moved up (above the “0” position, towards 

the “+12” position), the selected frequency area is boosted, and when it is moved down 

(below the “0” position, towards the “-12” position), the selected frequency area is attenuated.  

For more information, see the “About Equalization” section on pages 13 - 14 of this manual.

15.   EFX LEVEL – Control knob used to set the amount of digital effect that’s mixed in with the 

channel input signals.

16.  EXF SELECT - Used to select one of the available 100 digital effects presets.
17.  EFX PRESET Display - Shows the current selected preset program number.
18.  VOLUME - Control knob used to control the overall level of the AC75 or AC150 amplifier.