The 1200W Mesa Boogie Vintage PowerHouse 2x15 Bass Speaker Cabinet bracing is borrowed from the aircraft industry. All the Vintage PowerHouse speaker cab's structural reinforcement is sculpted-out to form an extremely strong skeleton that reduces weigh with loosing rigidity or structural integrity. The Mesa PowerHouse Bass cabinet's tri-ported design is an innovative front facing, multi-vent porting system that uses individually tuned triangular ports to enhance each part of the bass spectrum. This goes way beyond the old standard design that has all your tone blowing out of a single large port hole. The Mesa Player Control Network is a proprietary back-panel interface that provides unprecedented stylistic versatility and gig-friendly convenience. The Player Control Network includes a 3-position switch for crossover frequency, an adjustable L-Pad for blending the right amount of high frequency driver, re-settable horn protection plus standard 1/4" and high-current Speak-On locking connectors. The Vintage PowerHouse cab's Style Control crossover and attenuator is an artistic crossover Range switch that provides 3 distinct tonal variations: time-proven, detail-enhancing, sweet 5K (Normal) setting; plus the harmonic-friendly, accent-expanding snap of 4K (Sheen) and the groove-enforcing, articulate cut of 3K (Bright). This combined with the premium L-Pad horn attenuator provides players with unrivaled stylistic versatility and performance. The Instant Reset Horn Protection is a simple "one touch" reset switch, providing the ultimate in convenient horn protection. No fuses, tools or digging inside the cabinet; Just push and play. Convenient inputs and paralleled outputs are provided for both standard 1/4" and Speakon high current, locking connectors. Thanks to the Mesa Boogie Vintage PowerHouse Bass Speaker Cabinet's heavy-duty construction, the cab's exterior is a hard-shell road case. Mesa Boogie PowerHouse bass cabs represent premiere sound and construction that lasts, no matter what the road throws at you. Shipping charges apply Only available for U.S. shipping and requires a valid U.S. billing address. Please call (866) 498-7882 for more information.