DJ Zirk

In this 2021 article on the LoadedSamples blog, author Binsu states:

Up and coming hip-hop artists soon caught on to Spanish Fly's technique of production with this machine [Boss DR-660]. Early adopters of this gear began producing entire albums with the DR-660, mainly utilizing its 808-style drum sounds. Some examples of this are DJ Zirk's "2 Thick" tape (1993), Mac DLE's "Level 6" tape (1993), and Tommy Wright's "Ashes to Ashes, Dust to Dust" tape (1994). There were many albums exploding onto the Memphis scene during 1993-1995 heavily featuring the sounds of the 660. My personal favorite tape which highlights this machine's capabilities is Shawty Pimp & MC Spade's "Solo Tape", which was released in 1993.

You can't trust everything you read on a blog, but DJ Zirk himself states that "we had a little Boss drum machine" in this YouTube interview from 2022.

In 1993, the year of "2 Thick's" release, the only other Boss drum machines that featured the kind of 808 samples heard in Memphis rap were the DR-550mk2 (which didn't allow it's sounds to be pitched up and down, which is a non-starter for the Memphis style) and the brand-new-at-the-time Boss DR-5 micro arranger (a popular machine in the Memphis rap scene, but brand new to the market in 1993 and more focused on tonal instrument sounds than being a dedicated drum machine).

Also, if you're familiar with the 660's unique sonic fingerprint, you can just listen to Zirk's 1992-1994 tapes and judge for yourself.