This is a two-channel passive isolator. It accepts both balanced and unbalanced signals and eliminates hum and buzz noise. It can be used with instruments and consumer devices as well as professional audio line-level equipment. Its two-channel configuration makes it ideal for use in stereo racks and pedalboards. Supports unbalanced and balanced inputs and outputs. Both inputs and outputs are mono 1/4-inch TRS terminals x 2 (L/R). Whether an unbalanced or balanced signal is connected, it is automatically converted to the appropriate signal based on the type of cable and connector. All the user has to do is connect the plug. Pad Switch & Ground Lift Switch It also features a PAD switch that lowers the input sensitivity by -15dB if the input signal is too loud, and a LEFT PHASE switch that inverts the phase to align the phase of the output L. High-quality parts and exceptional durability. Equipped with two flat-frequency Eclipse transformers, it delivers a 20Hz to 20kHz frequency response while maintaining excellent sound. The passive circuitry means no power supply is required; simply connect your gear and you're ready to go. The housing is made of durable 16-gauge steel and, like all Radial products, is made in Canada. Specifications Audio circuit type: Passive Transformers Frequency response: 20Hz-20KHz +/-1db Dynamic range: >140db Maximum input: >+25dBu Gain: -2dB Total harmonic distortion: <0.0008% @ 1kHz Phase deviation: >5° @ 30Hz Input impedance: Variations with Load/47K Output impedance: 600 Features Transformer: Eclipse Custom Input pad: -15dB Polarity: 180deg reverse Ground lift: Disconnects TRS sleeve at output Input connector: 1/4 TRS phone Output connectors: 1/4 TRS phone General Construction: 14 gauge steel chassis & outer shell Finish: Durable powder coat Size: (L x W x D) 4.5 x 1, 85 x 1.35 (114mm x 47mm x 34mm) Weight: 0.9 lbs (408 grams) Shipping size: (L x W x D): 8 x 5 x 3 (203mm x 127mm x 76mm) Shipping weight: 1.0 lbs (453 grams) Power: Passive, no power required Conditions: For use in dry locations only between 5°C and 40°C