In a video of Prince & The NPG's Gold Experience Tour aftershow in Brussels on March 28, 1995, Prince can be seen using a Marshall JCM 900 4500 guitar amplifier head.

Buzz Osborne occasionally uses the Marshall JCM 900 4500 guitar amplifier head. While the specific model he uses is uncertain, it is likely the dual reverb version. This is suggested by its distinct features, such as more knobs than the JCM 800 and a black footswitch next to the JCM logo. A user-uploaded photo on Equipboard provides visual evidence of this usage.

In a 2010 interview with Ultimate Guitar, Joey tells Steven Rosen that he placed a Marshall JCM 2000 ind the middle and a JCM900 on both the left and right side of the track when recording "Women And Children Last"

It is unclear wether the JCM2000 and 900 were only used on the 2010 Murderdolls album or if it was also used to track 'Beyond The Valley Of The Murderdolls' Although in the music video 'White Wedding' Joey can be seen standing next to a JCM2000

Quote from the article: "I have three different ones: a rhythm sound; a lead sound; and another one. I have a middle track that I use which is a JCM 2000 that's straight up the middle then I have two 900's that are modded that are on the left and the right. All Marshall."

I could not find any photos to support the live usage of the JCM900 but plenty of evidence can be found on the JCM2000

In all its a great interview where Joey also give more information about what pedals and guitars he used.

He switched over from JCM 800's to JCM 900's in 1993 and continued using them until Primus' hiatus in 2000. They were his main amps during during the Pork Soda and Punchbowl-era, but in 1997, he began to use them with other amps.

In a YouTube video by TC Electronic titled "Bring Me The Horizon - Gear Run @ Roskilde Festival 2016," John Jones of Bring Me The Horizon is mentioned by tech Joey Black as using the Marshall JCM 900 4500 guitar amplifier head.

Stein keeps his stage arsenal simple, relying on a Marshall JCM900 head, a Vega 2x12 cabinet, his new leather-covered Fender Custom Shop Stratocaster, and a Dean Soltero.

you can see these amps onstage

En este show de Skay se ve de fondo el JCM 900.

In a user-uploaded photo, Andra Ramadhan is seen using a Marshall JCM 900 4500 guitar amplifier head, identifiable by the label on the left side.

"an interview with Alex Skolnick (who replaced Criss after his death) reports that Criss used a Marshall JCM 900 50 watt head on Edge Of Thorns as Skolnick used the same amp himself on the Savatage album Edge Of Thorns."

Guitar World: Discuss your gear set-up for the new album (The Beginning of Times).

Tomi Koivusaari: Personally instead of Marshall this time I used Engl's Invader amp for the rhythm guitars, with some Marshall (JCM) 900 on cleaner parts. I used only analog pedals, such as analog delay, wah, phaser.. very basic stuff. I have few customized ESP's which I used on recordings as well. Also on this album I played some additional pedal steel guitars here and there; I love that sound. On live playing I still prefer a Marshall JVM 410 or 900 head.

In a YouTube video by TheGuitarGeek titled "This Is How Skunk Anansie’s Ace Gets THAT Sound," Ace discusses his use of the Marshall JCM900 4500 amp head. At 7 minutes and 40 seconds, the amp is identified by its faceplate reading '50W Hi Gain Dual Reverb'.

Ace states, "I bought the 900 when I was kind of like a kid when they came out and it stayed with me ever since I bought that amp. It's just an amazing sounding amp."

Ace further explains at 8 minutes and 7 seconds, "It's got the gain all the way up, but it's got the presence and treble backwards. So it gets really, it's a really fat sound."