The UA Apollo Duo features 18 inputs and 24 outputs feeding high-end AD/DA conversion; 4 premium digitally controlled preamps and 2 DI inputs allow connection of microphones, guitars and other instruments. These inputs can be switched from the front-panel along with gain, phase, low-cut, pad and phantom power. The 10 segment LED meters provide a visual indication for levels, input channel status and clock settings. Also featured on the front are 2 discrete headphone outputs and gain control for recording and monitoring duties.
Alongside the mic and instrument inputs are a whole host of I/O options, including: 8 analogue I/O, dedicated monitor outputs, 8 channels of ADAT I/O, stereo S/PDIF and word clock I/O. There are also 2 Firewire 800 ports (as standard) for multi-box linking and connection of other Firewire compatible devices.