A modified SD-1 was used live in 2009, as stated in the May 2012 issue of Guitar World. This can be corroborated from this Guitar Geek diagram and ...

Ici cette photo demontre que Warren DeMartini a utilisé un Soldano SLO100 tout au long de sa carriere

Warren described his live rig his Guitar World interview, April 1987: "The output of [Marshall 100-watt amplifier's] preamp section goes into a control board for the effects I’m using, which are a Lexicon PCM-41 delay, a PCM-42 delay, and the Yamaha SPX90."

Ratt only seemed to have custom...

"John Levin (Dokken) turned me on to it and it's smoking hot!"

DeMartini uses his signature pickups on Charvel guitars, according to Guitar Geek's rig diagram.

...

According to Guitar Geek's rig diagram, DeMartini uses Charvel San Dimas (2 of them and they're custom painted).

In August 2022 edition of the Guitar World, DeMartini mentioned the relationship with Charvel:

That was part of the revolution Ed started, where you could ...

Warren described his live rig his Guitar World interview, April 1987: "The output of [Marshall 100-watt amplifier's] preamp section goes into a control board for the effects I’m using, which are a Lexicon PCM-41 delay, a PCM-42 delay, and the Yamaha SPX90."

In 1987 Ratt only seemed to hav...

Used live in 2009, as stated in the May 2012 issue of Guitar World. This can be corroborated from this Guitar Geek diagram and ...

Warren described his live rig his Guitar World interview, April 1987: "The output of [Marshall 100-watt amplifier's] preamp section goes into a control board for the effects I’m using, which are a Lexicon PCM-41 delay, a PCM-42 delay, and the Yamaha SPX90."

In 1987 Ratt only seemed to hav...

Aside from legato soloing and crunchy riffs, one of Warren DeMartini’s most identifying trademarks is his now legendary snakeskin guitar, which was prominently featured when Ratt was in heavy video rotation during the early days of MTV. At the time, it prompted many young players (including one o...

In this interview, regarding the recording of “Out Of The Cellar”, Warren states:

Did you really use a Fender Super Champ to record the solo tones on Out of the Cellar?

Yes, a Fender Super Champ, and I disconnected the speaker and plugged it into an EV s...

In this article Warren talks about gear he used on Infestation track “Last Call”:

That was a recorded on my Charvel [Frenchie, not currently offered as a production model]. The amps were a Diezel V4 [VH4] and Soldano SLO 100-watt. We plugged them both in and sort of split the...

In this interview with WoodyTone, Warren states:

For strings I’ve been using Rotosound 10s, the nickel Roto Yellows, 10 to 46. For picks I use nylon 73 mm Dunlops.

According to the Rotosound website and article from Guitar.com from 8/31/2020 Warren uses these strings

https://www.rotosound.com/players/