In this photo of the inside artwork of The Black Keys album: Rubber Factory, the combo amp sitting on the far left is an Ampeg Gemini I, which coincidentally can also be seen on the inside cover of their debut album: The Big Come Up in the photo where Dan is performing a rather impressive jump.The rich, wet reverb and spiky, gritty drive tones of this amp can be heard on both these albums.

Bob Dylan plays a Fender Stratocaster electric guitar through an Ampeg amplifier while recording his album ‘Bringing It All Back Home’ on January 13-15, 1965 in Columbia's Studio A in New York City, New York Photo: Michael Ochs Archives

Rob Schnapf mentioned that after recording XO Elliott Smith didn’t have a rig to tour with so he lent him a Gibson 330 and an Ampeg Gemini amp, staring around 7:08 in the Show Us Your Junk video, and “he loved it”…

Used in the recording of the album "Move Like This" as explained by the guitarist.

Ampeg Gemini: Greg recorded the first three Wipers records with 1965 Ampeg Gemini. Due to its fragility, and extreme weight, Greg never toured with it (though it can be seen in the background of this photo.) However, this amp's tremolo (which Greg set extremely low, to use as a semi-choral effect) and heavy reverb was essential to the guitar tone and tecnique on those records.

In Columbia's New York studios in June and then again in July, Michael played his Telecaster through an Ampeg Gemini I, a studio amp, while he, Dylan, Al Kooper and a number of studio musicians laid down tracks.

Heath Fogg of Alabama Shakes is seen using the Ampeg Gemini I G-12 amplifier in a user-uploaded photo.

"I also used a blackface Deluxe Reverb; the slide on “Supersonic” was a ’59 double-cut Les Paul Junior through a late-’60s Ampeg Gemini. I played the last part through that amp before it bit the dust – power transformer blew. I had blown the output transformer a few years earlier… and the speaker. That amp’s had a tough life!"

In a "Six Questions" interview on Tumblr, J. Robbins discusses using the Ampeg Gemini I G-12 amplifier.

This image appear on a Lily's geocities fansite, reportedly found on Guitar Geek.

The in-house G-12 at Daptone's House of Soul was used for Charles Bradley's No Time for Dreaming, as mentioned by Brenneck in this March 15, 2011 Electronic Musician interview.

“Some of these tracks have the crunchiest organ and Rhodes sounds,” Brenneck explains, “because they were getting bounced with the guitar [a ’66 Harmony H74 through a ’68 Ampeg Gemini amp], and of course every time you bounce, you get another generation of tape compression. You don’t really need outboard gear when you do that, and you can end up with some really tough-sounding shit. Then you’ve got Bradley and the horn players just pinning the needles with tape distortion; there’s no way I’m gonna record it again if what they just did is magic. It’s all about commitment and hard work beforehand, and I think the sound just comes naturally as a result of that.”

The specification of a G-12 is made in this November 1, 2007 Electronic Musician article by Daptone founder Gabriel Roth (a.k.a Bosco Mann), who describes how he acquired it.

Ampeg Gemini G-12 guitar amp: “About 10 years ago, I was walking down the street on my way to the studio,” Roth says, “and as I passed a building that was being demolished, I felt a bang against my leg. They were gutting the building and one guy was throwing all the garbage out the door over the sidewalk to another guy on the street who was tossing it into a dumpster. That Gemini is what hit me in the leg on its way to the dumpster. How's that for fate? Didn't even need to repair it.”

The in-house G-12 at Daptone's House of Soul was used on Shattered, as mentioned producer and engineer Wayne Gordon in this August 28, 2014 Electronic Musician article,

“For Mike (Catanese)’s and Greg’s guitars, they used [the studio’s] Ampeg Gemini, a couple of Magnatones, and Greg brought in a boutique amp of his own. Mike plays a ’70s Silvertone that sounds f*cked up in a good way, which helps."

The specification of a G-12 is made in this November 1, 2007 Electronic Musician article by Daptone founder Gabriel Roth (a.k.a Bosco Mann), who describes how he acquired it.

Ampeg Gemini G-12 guitar amp: “About 10 years ago, I was walking down the street on my way to the studio,” Roth says, “and as I passed a building that was being demolished, I felt a bang against my leg. They were gutting the building and one guy was throwing all the garbage out the door over the sidewalk to another guy on the street who was tossing it into a dumpster. That Gemini is what hit me in the leg on its way to the dumpster. How's that for fate? Didn't even need to repair it.”