JBL Synthesis K2 S9900 - Manual (Page 12)

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The transducers, horns and crossover networks are housed in a visually stunning
enclosure that is reminiscent of both the DD66000 and K2 S9800 systems. The
specially curved baffle provides the sidewalls for the main horn. The top and
bottom horn flares are accomplished by the attachment of precision-molded
SonoGlass
® horn “lips” to the upper enclosure surface. The UHF driver is
mounted to a SonoGlass horn which is itself mounted to the back of the
die-cast aluminum housing.
The entire enclosure is constructed with 1-inch (25mm) MDF. The complex
bracing is used to precisely hold the curved panels in exactly the correct shape,
allowing exceptional fit and consistency.
The woofer baffle is 1-inch thick and is tied into perimeter bracing, constituting
an extremely rigid and secure structure. A painted outer baffle is then applied,
surrounding the woofer frame, giving the total combined woofer baffle a
thickness of 1-3/4 inch (45mm). The outer baffle is removable to enable repair
or replacement of the painted surface, should that ever be necessary.
The system is ported on the rear with a tuning frequency of 35Hz. A large
4-inch (100mm)-diameter flared port is combined with the input connections
on a massive die-cast aluminum structure. The entire enclosure rests on four
stainless-steel foot assemblies. Stainless-steel coasters are included to protect
wood and tile floors from damage from the spike feet. The grille assembly is
constructed of fiberglass-reinforced ABS to provide the curved shape. The
grille is securely attached to the enclosure with metal pins and rubber cups.