Passive DI box. Jack input with parallel "THRU" output, transformer balanced XLR output. Attenuable input sensivity, can handle both line level and speaker level singals. Technical specifications: Input impedance: 68,000 ohms, output impedance: 600 ohms Transformer ratio: 10 : 1 Maximum output: +6 dB Ground lift switch Metal casing 110 x 73 x 42 mm