The ART CLEANBoxPro dual channel level converter provides two channels of unbalanced to balanced level conversion and two channels of balanced to unbalanced level conversion in a rugged, compact, and portable unit. It offers stereo level controls to optimize signal levels, and features XLR connectors for balanced I/O and RCA phono jacks and stereo 1/8″ mini-phone jacks for unbalanced I/O. XLR connectors for balanced inputs and outputs RCA phono jacks and stereo 1/8″ mini-phone jacks for unbalanced inputs and outputs Unbalanced output level control Balanced output level control Rugged extruded aluminum case Lighted On/Off switch Comes with external power supply for operation with AC mains Low noise, low distortion circuitry Frequency Response: 20 Hz – 20 kHz, 1 dB Total Harmonic Distortion: < .01% @ 1 kHz Signal to Noise Ratio: > 90 dB Common Mode Rejection Ratio: > 40 dB Input Impedance: Balanced – 20k Ohms; Unbalanced – 100k Ohms Output Impedance: Balanced: 100 Ohms; Unbalanced: 300 Ohms Maximum Gain: Balanced to Unbalanced: -6 dB;_Unbalanced to Balanced: +21 dB Maximum Input Level: +21 dBu Maximum Output Level: Balanced: +21 dBu;_Unbalanced: +15 dBu Power: 7.5-12 V AC/DC, < 150 mA Dimensions (DxWxH): 1.85 x 4.6 x 4.3 (in);_47 x 117 x 109 (mm) Weight: 1.10 lbs / 0.50 kg