Adam Clayton: Stage and Studio
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WARWICK | Reverso | Prototypes

Warwick Stryker # 1
(2) mirrored pickups, (4) control knobs

Warwick Styker # 2
(2) mirrored pickups [passive], (2) gold control knobs & (2) chickenhead knobs

Warwick Stryker # 4
(1) mirrored pickups (passive). (2) control knobs.

MAKE: Warwick
MODEL: Stryker (modified/reverse)
FINISH: Natural curled maple finish

It seems that Adam as a few of these beauties. It was Adam Clayton's idea to use to alter the Stryker design to an upside down/verse body (per Warwick).
The initial bass delivered had active pickups.
A second Stryker was made with passive pickups, which Adam prefers. 
The third Stryker seen, could be a modified version of an earlier Stryker or indeed a different/3rd model. Instead of the (4) control knobs near the underside of the bridge, there are (3) control knobs. There looks to be a space where the 4th knob could have initially been located. That said there is a single knob near the underside near where the neck meets the body.
A fourth Stryker was made with one passive mirrored. This is the bass that can be seen in pictures/video from U2's November 5th, 2009 show at the Brandenburg Gate in Berlin, Germany.

Per Warwick:
"Adam asked for the reversed body. And it is not just a reverse body, it is modified slightly.

The one with Chicken head pegs is full passive, with bass and treble pots and capacitor switch. The pickups are custom wired by Seymour Duncan

The other one is with normal 3 Way EQ, the first we made for him."


"So there I was, fifteen years old, with a dark brown Ibanez-copy bass guitar and no amp. I had no idea what I was supposed to do with it. Absolutely none. Not a clue. It just sounded good to me." - Adam Clayton