The JPC from Radial Engineering is a stereo direct box that has been specifically designed for connecting computer sound cards and other consumer electronic products to a professional sound system. It combines the advantages of transformer-isolated inputs with an active drive circuit. Transformer-coupled inputs isolate the source from the destination. This eliminates 60-cycle hum and buzz. Because the active circuit does all of the impedance conversion and balancing, a dedicated 1:1 transformer can be used. This results in a hybrid design that is at once great sounding, compact, and affordable. The book-cover, wrap-around sleeve design protects switches and connectors from damage while the 14-gauge steel I-beam construction eliminates stress that could torque the PC board and cause solder joint failure. A full-bottom, no-slip pad provides electrical insulation and mechanical isolation. Product Specification: Item Type: Standard DI Number of Channels: 2-Channel Active/Passive: Active Circuitry: Solid-State Pad: -15 dB Ground Lift: Yes Polarity Reverse: No Low-Cut/High-Pass Filter: No Audio I/O: 1x Stereo 2RCA Unbalanced Input 1x Stereo 2RCA Unbalanced Thru 2x 1/4"" TS Unbalanced Input 1x 1/8"" / 3.5 mm TRS Unbalanced Stereo Input 2x XLR 3-Pin Balanced Output Frequency Response: 20 Hz to 20 kHz ±2 dB Input Impedance: 10 Kilohms Output Impedance: 600 Ohms Total Harmonic Distortion/Noise: 0.01% (at -15 dBu Output) Signal-to-Noise Ratio: -97 dB -97 dB Operating Voltage: 48 V (Phantom Power) Dimensions: 5 x 3.3 x 2" / 127 x 84 x 51 mm Weight: 1.55 lb / 720 g Shipping Weight: 1.78 lb Shipping Dimensions (LxWxH): 6.35 x 4.35 x 2.95"