The Z Best 2x12 closed back cab is an animal all its own. We have utilized a Theile Ported design which allows us to dial in the full frequency range of the guitar. Low end is determined by the port thickness, Mid response by the shelf depth, and Top end by choice of speakers. Placed vertically, the Z Best delivers a tuned focused sound. yet has the airy qualities associated with open back cabs. When placed horizontally, you pick a bit more low end as the port is then coupled with the floor. This is a long throw cabinet that will get the sound to the back of the room. Standard speaker configuration is a Celestion Vintage 30 and Celestion G12H30.