Features include:

• 1/4" parallel wired in/out jacks
• Ground Lift switch to help eliminate hum and buzz
• 30dB pad switch for selecting between line/instrument or speaker level input signals
• Switchable high cut filter to eliminate amplifier noise
• Uses Whirlwind's TRHL-M transformer with metal shield

Model # - DIR
Impedance Ratio (input to output): 133:1
Frequency Response: 20Hz-20kHz ±1dB
Level Change (input to output): -20dB (pad out), -50dB (pad in)