SoundOff

I have a question about the JL Audio Cleansweep. Do I need a Cleansweep SSI and a Cleansweep DSP at the same time? I know I definitely need a Cleansweep DSP, but Im not sure if I would need a SSI as well. (I have a high amplified interior speaker system where I am have noticeablle distortion mainy in the front speakers at high volumes.)

Also I'm confused about the master volume control on the Cleansweep DSP. I have been hearing 2 different things about the master volume control. I'm sure that someone can clear this up for me...
1) That I can still use the Radio/Steering Wheel/Stock Volume Control to control the volume without messing up the equalization/flatline effect that the CLeansweepgives me. Basically I wont have to use the cleansweep's master volume control and the cleansweep master volume control is needed for only for an aux. line.
OR
2) I must use the Cleansweep Master Volume control to control the entire car's volume to retain the cleansweeps automatic flatline/equalization. (Basically I should keep my radio at a constant volume and just use the JL Audio Master Volume Control knob)

Thanks in Advance!