16
CP9Pro
+
 Compressor/Limiter 
FEATURES AND CONTROLS
●CP9Pro+ by use of high-quality VCA (voltage controlled amplifier) and RMS 
(root-mean-square) sensor, provides natural attack response with low noise.
●CP9Pro+ uses a DC to DC voltage converter to bump 9V up to 18V. PT9Pro+ 
provides wide dynamic range and sufficient head room against distortion.
●Compression/Limit level response to picking dynamics is easily viewable with 
Threshold LED.
①IN (input jack)
Input jack to connect to the output of guitar, 
other effects or related equipment.  The 
product automatically turns on when a plug 
is inserted into this jack.  When not in use, 
disconnect plug from input jack to preserve 
battery life.
②OUT (output jack)
Output jack to connect to the input of 
amplifier or other effects.
③THRESHOLD (threshold level control knob) 
Controls threshold level of compression.  
(Fig. 1)  When an input signal is above the 
THRESHOLD level, compression will be 
carried out in the manner defined by the 
setting of the RATIO control.  (Fig. 2)  
Compression starts from a low level when 
this control is turned clockwise.  So turn the 
output level up by the GAIN control since the 
output level becomes also low.  (Fig. 3)
④RATIO (ratio control knob)
Controls compression ratio. Turn RATIO 
control knob clockwise to increase