RCA INPUT/OUTPUT: Our 5 band parametric equalizer has a turntable input, pre-amp line aux inputs via RCA Jacks. You may use the RCA output to connect a power amplifier, then connect the passive speakers and the RCA inputs for MP3, DVD, or Phone. EQUALIZER AND VOLTAGE: An output voltage level of 7V RMS at 0.05% THD and an operating voltage of 11V-15V. It also has a bass equalizer, mid-bass equalizer, mid equalizer 1 KHz-2 KHz high equalizer and each frequency adjustable has a -12dB to +12dB. PARAMETRIC EQUALIZER DIMENSIONS: Our product has a dimension of 7” x 4.1'”x 1.10” inches with an approximate weight of 1.5 lbs. It was a 9volt RMS pre-amp output with 3 input sources selectable and it is a size of a half din. POWERFULLY IMMERSIVE AUDIO: Take your audio to the next level with the powerful 5 bands adjustable parametric equalizer creating an audio experience that lets you listen to your beats the way the artist intended filling the room with blue light.