The 12-input desk can be used free standing or rackmounted. All mic/line input channels feature VMS optical compression; Studiomaster three-band EQ, with sweepable mid; and a total of four auxiliary sends. Like the original Horizon mixers, a combined stereo and mic input channel effectively adds three more mic channels. In line with standard Studiomaster practice, the focus of the FX section is on studio quality reverbs and delays.

Each amplifier channel supplies 1kW into 4Ω using class-G topology; stable into all loads with temperature and short circuit protection. Comprehensive three-stage amp routing is selectable between normal stereo operation, split function (Mix to the left and Auxiliary to the right), or Monitor only. Twin nine-band graphic equalisers feed the Mix output, which is routed to the amplifiers and the balanced XLR outputs.

The Horizon 2012 incorporates carry straps, removable control cover and a retractable panel to angle the mixer for the best working position;