Activity can be overrated, we mused, as we floated aimlessly in our neighbor’s pool while he was at work. Active direct boxes certainly have their strengths, but in some situations they’re the audio equivalent of chickens running around with their heads cut off. Keep it simple with this passive (yet very effective) unit.The PRO-DI is a full-range single channel direct box equipped with custom-made audio transformers for exceptional signal handling without saturation and low phase distortion in the critical bass and mid regions. Its brilliant clarity and definition make it ideal for acoustic guitar, bass and keyboards — live or in the studio.Main Features:Full range passive direct box (Mono)Isolation transformer eliminates noiseVery low harmonic and phase distortionCompact and rugged designIdeal for live sound and studioSpecifications:Frequency Response: 20Hz to 20kHz (+/-2.5dB)Harmonic distortion: 0.01% (20Hz to 20kHz)Phase Distortion:1 degree at 1Khz, 8 degrees at 20HzCommon mode rejection: -90dB @ 60HzInput impedance: 140kOhmsOutput impedance: 600 OhmsInput pad: -15dBSize (W x H x D): 2.75 x 4.25 x 1.75″ (70mm x 108mm x 44mm)Weight: 1.2lbs / .54kgConstruction: 14-gauge steel chassis & shell, baked enamel finishWarranty: 3 year limited warranty