Tool – Lateralus

This article from Gibson's website suggests that Adam Jones experimented with using a vintage Sunn "lead" head in the studio when recording Lateralus

Live and in the studio, Jones uses a blend of amps. Two favorites are a 1976 Marshall Super Bass and a Diezel VH-4 “blueface.” On the latter, he never switches out of the ultra-high-output third channel. During the recording of 2001’s Lateralus, he reportedly experimented with a vintage Sunn lead head, too, and for 2006’s 10,000 Days he blended his Super Bass and Diezel with a Bogner Uberschall and a Riveria Knucklehead. Jones drives all his amps hard to achieve his responsive tone. He also uses Mesa Boogie Dual Rectifiers and Marshall and Mesa cabs

Live and in the studio, Jones uses a blend of amps. Two favorites are a 1976 Marshall Super Bass and a Diezel VH-4 “blueface.” On the latter, he never switches out of the ultra-high-output third channel. During the recording of 2001’s Lateralus, he reportedly experimented with a vintage Sunn lead head, too, and for 2006’s 10,000 Days he blended his Super Bass and Diezel with a Bogner Uberschall and a Riveria Knucklehead. Jones drives all his amps hard to achieve his responsive tone. He also uses Mesa Boogie Dual Rectifiers and Marshall and Mesa cabs.

Jones is also a glutten for effects. On the intro to “Reflection” and “The Grudge,” both from Lateralus, he employs a vintage Moog Taurus bass pedal system. But aside from the Heil Talk Box on 10,000 Days, run through a Roland JC-120 and juiced up by a dynamic compressor, Jones’ choices of effects is less esoteric. His wah-wah pedal is a dependable Cry Baby, and his stable of other sound generators includes Boss DD3 and DD5 digital delays, a BF-2 flanger, a Line 6 Delay modeler (which also samples on the fly), a Strobostomp tuner, a tremolo pedal, chorus, and an array of distortion boxes. During experimental phases, Jones has taken the stage with multiple pedal boards at his feet. The irony of this rundown is that Jones has gone on record saying he doesn’t like to use pedals.

Jones is also a glutten for effects. On the intro to “Reflection” and “The Grudge,” both from Lateralus, he employs a vintage Moog Taurus bass pedal system. But aside from the Heil Talk Box on 10,000 Days, run through a Roland JC-120 and juiced up by a dynamic compressor, Jones’ choices of effects is less esoteric. His wah-wah pedal is a dependable Cry Baby, and his stable of other sound generators includes Boss DD3 and DD5 digital delays, a BF-2 flanger, a Line 6 Delay modeler (which also samples on the fly), a Strobostomp tuner, a tremolo pedal, chorus, and an array of distortion boxes. During experimental phases, Jones has taken the stage with multiple pedal boards at his feet. The irony of this rundown is that Jones has gone on record saying he doesn’t like to use pedals.

At 2:19, a closeup of Adam's pedalboard shows a Boss DD3 delay pedal.

2:13 on this YouTube video for DunlopTV, featuring Adam Jones's tech, Chris Leahey showing that part of Adam's distorted tone, seen in the pan of his board comes from one of the pedals that includes the Boss BF-2.

As recalled by his guitar tech Chris Schlyer, Justin Chancellor uses the Wal 4string fretless Bass on "Lateralus" and in "Rosetta Stoned".

Justin used these earlier on during the Aenema tours. He also used one recording Lateralus and has recently been seen with one in his rack during the Fear Inoculum tours.