Through years of engineering expertise, handcraftsmanship and critical testing procedures, Rockford has created a wide range of products that reproduce music with all the clarity and richness you deserve.Rockford engineers designed the Power series amplifiers to withstand the rugged automotive environment while delivering superior sound quality in a flexible, reliable, and efficient package. TRANS-ANA is a low voltage circuit in the preamp stage lets the music sound crystal clear and very real, even when played at high volume levels. This is matched with TOPAZ, a unique grounding circuit used to eliminate noise problems associated with car audio systems and their installation. Flexibility is accomplished with the use of a built-in variable crossover. The use of a protection circuit called NOMAD, along with MOSFET and DSM (Discrete Surface Mount) technologies improve amplifier efficiency. The result of these components gives the Power amplifier awesome sound quality in a "Bullet Proof" package.