JBL manual Project EVEREST DD66000

Project EVEREST DD66000

The transducers, horns and crossover networks are housed in a visually stunning enclosure that is reminiscent of both the Hartsfield and Paragon 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.

All of the enclosure is 25 mm 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 module is a 6 -sided shell and form an extremely rigid and secure final structure. A leather covered outer baffle is then applied giving the total combined woofer baffle a thickness of 45 mm. The outer baffle is removable should repair or replacement of the leather surface ever be necessary.

The system is ported on the rear with a tuning frequency of 34 Hz. Two large 100 mm diameter flared ports are combined with the input connections on a massive 3-piece die cast aluminum structure. The entire enclosure rests on 4 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 MDF and uses a thick, perforated metal sheet to provide the curved shape. The grille is held on the enclosure using metal pins and rubber cups.

The 1501Al and 476Be are both designed to be absolute minimum distortion drive units. Although they are capable of tremendous acoustic output, their design intent is to be completely linear in every way up to a reasonable drive level. This enables the system to sound the same regardless of playback level.