Madonna

According to this article:

Madonna uses a 2002 Gibson Les Paul Standard with custom Seymour Duncan Alnico 2s overwound for Madonna's hands for more presence.

In this photo, we can see Madonna using Gibson SG Custom.

In this photo, Madonna is seen using Gibson Everly Gibson Everly Brothers Signature J-180.

Signature models will become prized possessions for decades to come, and the Performer models will prove to be major players in future of music to come!! It's being used by Stevie Wonder, Maroon 5, the Crystal Method, Electric Skychurch, Duran Duran, Air, Morcheeba, Black Eyed peas, Nine Inch Nails, Blues Traveller, Red Hot Chili Peppers, Dido, The Cure, Herbie Hancock, Rick Wakeman, Yes, Nickelback, Dream Theater, Paul Simon, Joy Electric, the Neptunes, Alicia Keys, CeeLo Green, Madonna, Incubus, FUN, Radiohead, Bjork and more!

Madonna has used the Sennheiser SKM 5200 wireless microphone during several tours, including Sticky & Sweet, MDNA, and Rebel Heart, as seen in the YouTube video "Madonna - La Vie En Rose (Live in Stockholm, Rebel Heart Tour)" by Chamuyero. She typically opts for custom versions of the microphone, often in silver chrome, rather than the standard black. Notably, she used a chrome-gold customized version during her Super Bowl performance.

During her performance at Pride Island on June 30th, 2019, Madonna used the TC-Helicon VoiceTone C1, a vocal effects pedal known for its precise pitch correction and instrument input capabilities.

"Madonna’s performance of ‘Living For Love’ was highlighted with her singing through a Sennheiser SKM 5200 transmitter coupled with an MD 5005 capsule, along with a Sennheiser 2000 IEM wireless system for monitoring."

"For this globetrotting tour, Madonna's four SKM 3072 handhelds are run through a passive switcher to quickly reassign them to both front of house and monitors simultaneously."

Madonna posted an Instagram story during her Madame X tour where the Sennheiser MD 9235 is visible in her hand.

using the piano preset for Vogue...

During Madonna's Confessions Tour, she uses the Access Virus TI Polar synthesizer, as seen in the YouTube video by M Videos2.

According to ESP Guitars:

Last night (Sep 9, 2015) at the opening of her 'Rebel Heart' tour in Montreal, Canada, Madonna strapped on an ESP E-II V and went to town during a killer performance of her 1983 hit "Burning Up"!

In this screen grab from the video: https://youtu.be/9ODgYFJ_eDU Madonna can be seen recording Skin into a Sony c800g at 6:51.

Madonna uses the Martin D-28 acoustic guitar, as evidenced by its distinctive fingerpicked introduction in her song "Hollywood," featured on the album American Life. This information is corroborated by the article titled "COVERT Operation" from Remix Magazine.

Madonna utilized the Roland VP-9000 on her song "I'm So Stupid." In reference to this track, it was noted: "I am thinking of a track like ‘I'm So Stupid.’ That is one of the most innovative tracks on the album. The vocal starts very gently; then, I freeze it using the Roland VP-9000. It is the only machine that can do this. It is not a sample loop; it is a freeze. When she sings ‘Aaaaaahhhhhh,’ the vocals freeze. It is a gently modified track. It sounds natural, but it is not natural." This information is supported by the article titled "COVERT Operation" from Remix Magazine.

Madonna used the Universal Audio LA-2A compressor/limiter on her "American Life" album. As noted in the article "COVERT Operation," the production team stated, "We used mainly analog compressors on the vocals, sometimes very cheap or midbudget stuff, recorded with a Sony G800 tube mic, a Neve 8081 preamp and an LA-2A compressor/limiter. But everything is about the setting, my friend."

Madonna utilized the Clavia Nord Lead 2 Synthesizer for the main bass line in her song "Hollywood." The meticulous attention required for controlling the filter and ensuring expressiveness in the bass-synth sounds from the Nord Lead 2 was highlighted in a source, where it was noted: “You have to be very careful with the controller and the way the filter is used. With bass-synth sounds [from the Nord Lead 2], if you don't use the legato, if you don't add expressiveness, it is very static-sounding. This is why some electronic music is very cold. For the main bass line in ‘Hollywood,’ you can't imagine how long I stood there with the controller.” This information is documented in the article "COVERT Operation" from Remix magazine.

Madonna utilized the AMS DMX 15-80S Digital Delay on “Hollywood” and “I'm So Stupid.” "Two machines were used for the extensive vocal editing in “Hollywood” and “I'm So Stupid.” Madonna preferred the Antares Auto-Tune plug in; Mirwais chose an AMS 1580 S-DMX pitch shifter."

Madonna used the Yamaha 02R mixer in the production of her song "Hollywood." This is confirmed by Mirwais, who worked on the track and stated, "I had to find exactly the right frequency on the Yamaha O2R mixer. It was very hard to find the right kick, too, because if I chose something bigger, the track would have sounded like an average club track."

Madonna is documented using a Neumann U87 Ai microphone while recording a song. The session was captured in an image as part of her announcement of publishing new songs and marking her return to recording studios. The setup included a pop filter to enhance response and eliminate plosives.

Madonna is confirmed to use the Access Virus TI2 Polar, as evidenced by a photograph showing her in the studio with producer Stuart Price, where the synthesizer is visible in the background.

Madonna is confirmed to use the Roland RE-201 Space Echo, as evidenced by a photograph depicting her in a recording studio with producer Stuart Price, where the gear is clearly visible in the background.