Rocktron Heart Attack Dynamic Filter - Manual (Page 8)

Specifications
Maximum Input
Input Impedance
Current Consumption
Power Requirements
+4dBu
220K
5mA
DC9V>100mA built-in regulator
* CE Approved *
Hints and Tips:
The Heart Attack pedal usually sounds better when placed after
distortion in the signal chain. However, the Heart Attack can be
used either before or after a distortion.
If using multiple pedals such as delays and other modulation
effects, try the Heart Attack in different parts of the signal chain
until you find the sound you like best.
If you have an effects loop in your amplifier - try putting the Heart
Attack in the effects loop for a different sound (please follow all
instructions in your amplifier manual when connecting to your
effects loop).