"For amps, Armstrong used a variety of heads and combos. "All of the half-clean/half-dirty tones are a mix of Billie's reissue 100-watt Marshall Super Lead (with a Bob Bradshaw gain mod) and a blackface '64 Fender Bassman head," says Schneider. Both amps run through Marshall 4x12 cabs loaded with Celestion Vintage 30s. The record's clean-yet-tough tones are courtesy of a Hiwatt Custom 100 through a 4x12 Marshall. "The tune 'Deadbeat' is a good example of the Hiwatt," relates Schneider. "That amp is super-clean and doesn't break up at all." A '50s Gibson GA-30 combo was used for all of the lead breaks on the record, and a Line 6 Flextone was pressed into service for tremolo tones." -Green Gear by guitar tech Bill Schneider

Tom Morello used the Line 6 Flextone Plus 2x12" Combo Amplifier exclusively in the studio, as noted by Angelfire.

In this interview from the April 2000 issue of Guitar World magazine, the Flextone Plus is listed as being one of Robert's amps during the making of the Bloodflowers album.

In Lenny Kravitz’ 2001 interview in the Howard Stern show, he can (surprisingly) be seen playing a Line6 Flextone amplifier. Of all the vintage gear he owns, he chose that to bring to the studio. The amp can be seen clearly throughout most of the “Let Love Rule” birthday video as well as other videos of the same session (he did other songs, see below). Best shots of the amp: 0:33’-0:37’, 1:20’-1:23’, 2:07’-2:13’ (clearly in the background of bass closeup), 3:23 (background) , 3:25’ (overview shot), 3:48’-3:52’ (pan), 4:20’-4:22’, 4:47+ (several shots). Other songs performed with same amp: https://youtu.be/MasrXmEn1Zo (Are You Gonna Go My Way), https://youtu.be/w4gFbXFEU5s (Again).