OK.... Lets give it a go... intended to be as detailed as the first post... in aim of achieving what the thread author set out to achieve...
[i][b]Justin Chancellor[/b][/i]
Bassist with Tool from the recording and release of there 2nd full length Album 'Ænima' in 1995. Justin remains part of the band at present.
[u]A little bit of back ground[/u] - Justin was born November 19th, 1971. He grew up in the UK, of English and Norweigen descent, and formed part of the prgressive rock band 'Peach' (He met Tool after Peach were given an opening spot on tool 'Undertow' tour), before finally settling in the US of A and joining Tool after the departure of bassist 'Paul D.amour'.
[u]Basses[/u] - Justin’s plays a Wal 4-string, which has a mahogany body, bird’s-eye-maple top, maple neck, and Indian rosewood fingerboard. He had Wal make another one just like it in the event of an emergency. He also uses a greenburst Wal as well as a forth Wal Mark III bass (Fretless) with a different body shape. For many years Justin has stuck with Ernie Ball Hybrid Slinky strings (.045, .065, .085, .110) and Clayton 1mm picks.
In the early days of his career with Tool he was seen live with Both Musicman Stingrays, and a Gibson Thunderbird, both of which have not made a live appearance since 1996, with Justin stating that he plays nothing but Wal now.
[u]Rig[/u] - To begin with Chancellor was very much a Mesa Boogie man with all his recording and live equipment coming from Boogie. His first few tours with Tool saw him using Mesa Road ready 8x10 cabs as well as a range of other Boogie equipment (M-2000, M-Pulse, Bass 400+).
Since 2001's 'Lateralus' recording and release Justin made a few changes to his rig set up. He still uses Mesa Road ready 8x10's for his clean rig, but favours Mesa Road ready 4x12's for his 'dirty' sound. He has also swapped out the Mesa heads and now exclusively uses the Gallien Kruger 2001RB, of which he runs 2 side by side (one for clean and one for dirty).
Justin runs three channels all the time. The first comes straight off the XLR output of his Wal bass into a Demeter VTBP-201-DBL preamp (currently available as the Demeter VTBP-201-S), which serves as the clean direct signal and never touches anything else in the massive signal path.
Channel 2 is the “clean” rig; Justin’s signal goes out of the splitter and straight into one of the two G-K 2001RB heads and into the Mesa 8x10.
Channel 3 is “dirty”; the signal passes through a ProCo TurboRAT distortion and one last EQ before going to the other G-K head and a Mesa 4x12 cab. The overall rig is a blend of these two miked cabs, adjusted for desired levels of clean and dirty, with the clean direct running in the background at all times.
To help explain the live set up I have included the following diagram..
[u]Style and Sound[/u] - Chancellors sounds is quite a unique kettle of fish, drawing upon many Guitar techniques and favouring the use of a pick. He use harmonics throughout his lines and the extensive use of chorus and delay in the music creates a dark sinister sound, while still holding a sold groove. Tool utilise timing shifts constantly and Chancellor's counter part in rhythm 'Danny Carey' often works with Justin to create a real push and pull feel through syncopated structures and poly rhythms.
Both Justin and Tool Guitarist Adam Jones are openly Anal about the sound they try to create. Chancellor is reported to mark out positions on the stage floor during sound checks, to indicate specific positions to stand in order to creat feedback in a particular way and is known on average to pull 3 hours worth of sound checking for the bass before a live show... I'm sure he's a real favourite with the sound man :-)
Sources of information - Wikipedia, Bassplayer Magazine (www.bassplayer.com), Numerous interviews with Justin Chancellor and my own eyes from seeing them live far too many times...
Shep