ART DTI Dual Transformer/Isolator Audio Interface Frequency Response: 10Hz -50kHz, +/-.5dB @ +4dBu THD: .01% Typical @ 1kHz, +18dBu, &lt;.05% @ 100Hz, +24dBu Insertion Loss: .4dB @ 100k Ohm Load, 5.5dB @ 600 Ohm Load Input Connections: XLR female balanced, 1/4 TRS unbalanced, and RCA type phono jacks Output Connection: XLR male balanced, 1/4 TRS unbalanced, and RCA type phono jacks