Featuring no parallel walls and an extensive internal bracing system, the P-39F’s cabinet structure ensures minimal cabinet resonance and maximum acoustic performance. The 27mm side panels utilize a constrained layer construction with multiple laminations of medium-density fiberboard that are molded through a proprietary process. They combine with an angled top panel and a 31mm steel-reinforced front baffle to form a cabinet enclosure with ideal rigidity, strength and performance attributes.