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The X-77L Leslie... and with the cabinet backs and some components removed.

The X-77L Upper Chamber is divided in two parts. The top part contains the same Treble horn as used in the "classic" 122/147 models. The two-speed motor and the V-21 driver for the Treble horn, and the two 6x9s for the Non Vibrato channel are in the bottom part.

The Mid Chamber holds the 15" bass speaker. In the aluminum box are the percussion channel Tremolo Generator and the "Space Generator," both belt-driven by the Rotosonic drum spindle.

Left The two 6x9 non-vibrato channel speakers are in the lower part of the upper chamber. Notice the belt tensioner and the relief on the shelf for the 2 speed motor. Right The 8" percussion channel speaker and its sub-enclosure.

The Rotosonic drum is clearly shown. You can also see where the 8" percussion speaker mounts on the baffle. Notice the two holes in the shelf that port the percussion sub-enclosure.

The percussion speaker's subenclosure and the power supply have been re-installed. The two wing nuts on the shelf above mount the single-speed motor.

Left The classic Leslie Treble Horn (mounted on the V-21 Driver) is the same one used in the "classic" 122/147 Models. Right The Jensen V-21 Driver (foreground) that gives the Leslie speaker that much-sought-after sound.

Left The single-speed motor drives the Rotosonic drum. The drum's shaft also drives the "Space Generator" and the percussion's Tremolo Generator. Right The two-speed motor drives the Treble horn.

Left Four 50W solid-state amplifiers drive the Bass, Vibrato, Non-Vibrato, and Percussion Channels for a wall-shaking total of 200 Watts! Right Probably the best part of the amplifier's design is using the back panel to heat sink the power transistors.