The SP 4x4 features a backlit linear meter to monitor input voltage, which gives the user a familiar analog-style readout when monitoring voltage from a power source.

The SP 4x4 also features ART's "4x4" distribution on the back of the unit -- four of the eight rear outputs are 1.25 in. apart. This allows the user to plug in wide power cables and multiple wall wart devices while still having eight total power outlets to choose from. Built into the SP 4x4 is a surge and spike protection system, designed to protect powered equipment from harmful electric surges and spikes.

The unit also has RFI and EMI filtering, a 15 amp breaker, and a total power capacity of 1800 watts. The SP 4x4 front panel features an on/off power switch (which lights up when turned on), and a circuit breaker reset switch. The rugged, all-steel chassis occupies 1 rack space and is intended for installation into standard 19 in. equipment racks.

Applications for the SP 4x4 include live sound systems/PA, permanent or fixed installations, church, club and practice PA systems, DJ sound systems, home and project recording systems, and monitor systems.