I have had these items for a few years now. They were never installed. I had the Stealthbox in the X5 E53 for a little while never hooked up. The only sign of wear is me pulling it out of the SUV today. Otherwise I can assure you it was never hooked up.
I checked the ebay listings for these items. The Subwoofer($499.00), the AMP($269.99) and the Remote Bass Control($25.99)
The Total is Roughly $800.00 + Shipping
I am asking $650.00 plus shipping or OBO.
1) JL AUDIO SB-B-X5/10W1V2/BK - 10" Sub in a Stealth Enclosure
2) JL AUDIO A1400 - MonoBlock Subwoofer Amp
3) JL AUDIO RBC-1 Rev 001 - Remote Bass Control
I do not have the box for the JL Audio Subwoofer but the other two items are unopened in the original packaging from JL Audio when they sent it to my home. I have not opened it up.
I am in the ATL, GA area. Not sure if the Zip Code Function works correctly.
I will ship but buyer pays for shipping or whatever we decide to work out.