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Formerly instrumental, bi-coastal prog-metal quartet re-introduces sound by adding a dynamic range of vocals by guitarist Nicole Papastavrou and bassist Chris Marrone. In 2022, the band parted ways with guitarist Zaki Ali and soon after welcomed Colin Cook as his replacement, bringing a new style of jazz chops to the group.

Kallias is comprised of players who are masters of their craft. Nicole Papastavrou and Colin Cook's 8-string guitar work nods to John Petrucci, Mikael Akerfeldt, and Fredrik Thordendal — with twisting riff progressions, charming cleans, tastefully intricate leads — all heavy with emotion. JP Andrade's undeniably precise percussion serves the music on every level, from jazz-influenced melodic sections to satisfyingly odd rhythms for the eager prog-loving ear. Beautifully woven bass lines by Chris Marrone provide an indomitable structure and embrace for each instrument — never overpowering, yet always highlighting.

For modern day prog and metal fans, Kallias can be compared to bands such as Opeth, Meshuggah, and Decapitated. The quartet holds a musical chemistry that is few and far between and that will keep you in the foreground from the beginning with bone-chilling introductions. This is by no means background music. Kallias creates their own genre for a panoramic audio experience that demands the listener's undivided attention to focus and feel.

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