Rupert Neve Designs RNDI, di, unrivaled phase coherence at all frequencies, which keeps the sound as natural as possible. input headroom of +21.5dbu, rupert neve custom transformer, powered by standard 48v phantom power, ground lift, instrument and speaker mode - in a speaker feed configuration, the di is used post-power amplifier to capture the tone of the preamp and power amp. connectors: in 6,3mm jack, thru 6,3mm jack, out xlr