API Select TranZformer CMP Compressor Pedal
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  • Regular price $280.25

API Select TranZformer CMP Compressor Pedal


  • Proprietary API 2510 OpAmp
  • Signature API output transformer
  • Adjustable attack and release times
  • Wet/dry blend control
  • Selectable feedback/feedforward compressor styles
  • Buffered bypass

The API Select TranZformer® CMP incorporates API's legendary VCA-type compressor circuit into a versatile and compact guitar effects pedal. Designed to easily fit into your pedal board and engineered to run off standard 9V power supplies, the CMP gives you classic studio-quality compression right at your feet. Other features include a buffered bypass in/out footswitch, adjustable attack and release times, wet/dry blend control, selectable "feedback" and "feedforward" compressor styles, transformer output, and of course the classic API sound.


Input connection:

1/4" Hi-Z unbalanced instrument input

Input Impedance:



Yes, buffered, 0dB

Output connections:

1/4" Hi-Z unbalanced output

Output Impedance:

Hi-Z output: Less than 1kΩ

Input Gain Control:

9dB - 30dB, Variable

Output Level Control:

-inf. to 0dB, Variable

Maximum output level before clipping:

+15dBu (9VDC)
+22dBu (18VDC)

Frequency Response:

+0dB, -1dB, 20-20kHz


Ratio (Sustain): Varies from 1:1 to 20:1 depending on compressor control setting.

Attack (switched): FAST (1ms) or SLOW (10ms)

Release (switched): FAST (300ms) or SLOW (1s)

TYPE (switched): New (Feed-forward), OLD (Feed-back)

Power Supply:

9-18VDC @ 100mA


4.6" x 3.8" x 3"

Size (Boxed for Shipping):

6" x 4.5" x 4.5"

Actual Weight:

1.5 lbs.

Shipping Weight:

2 lbs.