Martin Eric Ain

This is a shot from Celtic Frost live on Feb 8 1987. They opened for Metallica at Ijsselhallen in Zwolle, Overijssel, Netherlands. The bass player, Martin Eric Ain, is seen here playing a Washburn Force 40 Tour Series bass.

Played this bass in the early 2010's

Martin Eric Ain used a Gibson Flying V Bass during the 1980s, as evidenced by a user-uploaded photo on Tumblr.

Martin Eric Ain is seen playing a Rickenbacker 4003 bass guitar in a photo from the late 1980s, as shared on Tumblr.

In pictures and live performances from Celtic Frost's reunion tour, the distinctive red silk of the Rotosound RS66LH Drop Zone Stainless Steel Bass Strings (65-130) is visible. Furthermore, close-up images from these performances reveal the red, blue, and white ball ends characteristic of these strings. During this period, Celtic Frost tuned to B standard, which supports the use of the Drop Zone set by bassist Martin Eric Ain if not then it could be a regular heavy set of Rotosund RS66LD (50-110)

Martin Eric Ain used Rotosound RS66LD Swing Bass 45-105 strings on his basses during the 1980s and early 1990s with Celtic Frost. This is evidenced by the distinctive red silk at the string and ball ends, as seen in a photograph of his Rickenbacker.

Martin Eric Ain used the Warwick Streamer Stage II bass guitar since the Celtic Frost reunion in the 2000s, and it was his main instrument during the recording of the 2006 album "Monotheist." He tuned it to B standard. This is supported by visual evidence from a Getty Images photo.