APB-DynaSonics ProRack House is small-format mixers incorporate a wealth of professional features and exceptional performance into 10 rack spaces. The chassis design features an adjustable connector assembly that freely rotates and can be set to three different angles relative to the front panel. This allows the input and output jacks to be properly positioned whether the mixers are mounted in a vertical rack, slant rack or used on a desk top. ProRack's audio design is based on our critically acclaimed Spectra Series consoles. This includes the use of minimum phase-shift circuitry, expressive EQ and integrated mic preamplifiers, both used in a proprietary front end circuit. In addition to superior audio quality, reliability and serviceability are also primary design criteria for ProRack. Internal construction is based upon a passive mother board and multiple active daughter boards. The active electronics of a single input channel is designed onto two field-replaceable electronics modules. The power supply is a plug-in assembly that can be easily field-replaced by removing 6 screws. Special care has been taken to reduce RF interference and eliminate any Pin-1 related problems.