Thanks Brian-bmw. Since downgrading the amp is not plug n play I am removing that option from the list. I think I will just "find" the money and get the full upgrade done.

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[Sold] 2004 X5 4.4i - Sterling Gray - Truffle Brown, Sport, Preminum, Rear Climate, DSP, Sirius, PDC, 132's (19 inch wheel), Comfort Seats
Dynavin, JL Audio Stealthbox, Alpine PDX-5 Amp