A manually mountable ceiling speaker enclosure comprising a speaker can, a rim assembly having an inner annular support panel, and a plurality of flip dog assemblies, each flip dog assembly comprising a biased slidable ratchet block, a flip dog having a flip dog barrel, a flip dog neck, a flip dog foot, a plurality of arcuate upward pointing teeth extending from the barrel of said flip dog and an actuator rod coupled to a T-handle and a latch extending from one end of the T-handle, each flip dog assembly further comprising a. a first set of three openings in the inner annular support panel, wherein said first three openings comprise: i. a first opening to accommodate said actuator rod; ii. a second opening to accommodate said latch; and iii. a third opening for accommodating a tool for disengaging ratchets and releasing the flip dog foot from a clamping position in said flip dog assembly; b. an arcuate chamber: i. operable to receive the actuator rod and to slidingly receive said flip dog barrel and having a ratchet block opening for receiving an end of said biased slidable ratchet block; and ii. comprising a first arcuate wall comprising said ratchet block opening; and c. said biased slidable ratchet block further comprising: i. a plurality of horizontal alignment rods alignable to a respective plurality of ratchet springs to engage said biased slidable ratchet block and to bias said biased slidable ratchet block into said ratchet block opening in said first arcuate wall; and ii. downward pointing arcuate ratchet teeth extending from said biased sliding ratchet block through said ratchet block opening in said first arcuate wall to engage said upward pointing arcuate ratchet teeth on said flip dog barrel. a. a first set of three openings in the inner annular support panel, wherein said first three openings comprise: i. a first opening to accommodate said actuator rod; ii. a second opening to accommodate said latch; and iii. a third opening for accommodating a tool for disengaging ratchets and releasing the flip dog foot from a clamping position in said flip dog assembly; i. a first opening to accommodate said actuator rod; ii. a second opening to accommodate said latch; and iii. a third opening for accommodating a tool for disengaging ratchets and releasing the flip dog foot from a clamping position in said flip dog assembly; b. an arcuate chamber: i. operable to receive the actuator rod and to slidingly receive said flip dog barrel and having a ratchet block opening for receiving an end of said biased slidable ratchet block; and ii. comprising a first arcuate wall comprising said ratchet block opening; and i. operable to receive the actuator rod and to slidingly receive said flip dog barrel and having a ratchet block opening for receiving an end of said biased slidable ratchet block; and ii. comprising a first arcuate wall comprising said ratchet block opening; and c. said biased slidable ratchet block further comprising: i. a plurality of horizontal alignment rods alignable to a respective plurality of ratchet springs to engage said biased slidable ratchet block and to bias said biased slidable ratchet block into said ratchet block opening in said first arcuate wall; and ii. downward pointing arcuate ratchet teeth extending from said biased sliding ratchet block through said ratchet block opening in said first arcuate wall to engage said upward pointing arcuate ratchet teeth on said flip dog barrel. i. a plurality of horizontal alignment rods alignable to a respective plurality of ratchet springs to engage said biased slidable ratchet block and to bias said biased slidable ratchet block into said ratchet block opening in said first arcuate wall; and ii. downward pointing arcuate ratchet teeth extending from said biased sliding ratchet block through said ratchet block opening in said first arcuate wall to engage said upward pointing arcuate ratchet teeth on said flip dog barrel.