Firewire audio interface 2 x aux sendreturn series presonus firestudio design external interface firewire max sample rate 96 khz bitrate 24 bit dimensions 4852x445x178 cm weight 318 kg connections headphone 2x instrument analogue outputs 1 x 635mm stereo headphone 8 x balanced 635mm trs jack digital inputs 1 x spdif coaxial digital outputs 1 x spdif coaxial guitar input jack midi connectors 1 x midi in 1 x midi out phantom power