<p>The EQ570 is a solid well built four band EQ. With extremely low phase shift, and gradual curve filters that make it one of the most musical sounding EQ’s we have ever built. -RCA inputs and outputs -3.5mm (1/8") stereo inputs and outputs -The EQ570 can be used in many places for audio improvement. -Simply plug your source (phone, tablet, DAC, CD player or other player) into the EQ570 then out of the EQ570 to your preamplifier or headphone amplifier. -It can fill the role of a turntable only EQ for your system. From your phono pre/stage to the EQ570 then out to your preamp. You must use a phono pre/stage with the EQ570 for your turntable. -It also can act as a whole system EQ by plugging the output of your preamp into the EQ570 then out to your amplifier</p>