Requires no power supply
Passive
Cheap and Simple Design
Passive
Input and output impedances are completely dependent on each side of the transformer
Passive
Not suited for a wide variety of instruments
Passive
Higher impedances can acts as “antenna” when run long distance, which is why the impedance is stepped down
Passive
Uses electronic current to provide a constant low impedance output
Active
Provides several switched attenuation values like -20, -40, and -60db
Active
Can provide low and high filters
Active
Powered by either batteried or phantom power (+47)
Active
Can sometimes have a more full sounding frequency response, w/additional high and low frequency clarity
Active