Spencer Seim (Born January 28th 1981) is best known as the guitarist in the band Hella. He is also the drummer in the Nintendo music cover band called The Advantage. His composition style is mode heavy. He has been practicing on and off with Zach Hill (Hella drummer) since they both started playing music and both have been influencing each other throughout their musicianship. Playing for The Advantage, Spencer drums employing methods such as repetitive doubles on a single bass drum and quick cymbal muting. Spencer's style also often incorporates complex time signatures, well evidenced on Chirpin' Hard and recordings by the Advantage.

Spencer recently started a solo project named sBACH. The sticker on the cover of the self-titled release says "a thousand times better than Hella or The Advantage.

Spencer's guitars, SF3 and SF0SS, are designed by Scott French. They feature a nut pickup, a built-in amplified egg shaker, and individual outputs for each string pickup. His own beard clippings are used in the finish of the SF0SS. In February 2006 Spencer bought another Scott French guitar, made of eucalyptus and grafted walnut measuring ½ inch thick around the outside edge of the guitar's entire body. This is the only guitar Spencer used on Hella's 2007 release There's No 666 in Outer Space.

Aaron Ross is the name of:

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