4 output channels each with individual volume control Stereo 1/4" and 1/8" inputs (wired in parallel) can be connected to any line-level source or headphone output. Four stereo 1/4" and four 1/8" headphone outputs. Power "On" LED Maximum Input Level: +14dBu Maximum Output Level: 20dBu per channel Output Impedanve: 47 Ω per channel S/N Ratio: >90dB THD: <0.01% IMP (SMPT): 0.01% Power: 12VDC (Adapter Included) Dimensions: 44.5×107×89mm Weight: 0.61kg Note: 0dBu = 0.775Vrms