The  Momentus Duo Drive Turntable

Direct Rim or Tri-Belt Drive the choice is yours........

Prices from $ 14,900.00 please inquire larryd@ljtmfg.com

Please call about the incredible ONYX to Momentus Duo-Drive System Upgrade now available, please inquire larryd@ljtmfg.com

The world’s only Direct Rim Drive or Tri-Belt Turntable System enabled by our new Silent Drive Motion Control Drive System. The turntable is a modular super precision instrument that will reproduce music at it natural rhythm and pace with dead silent back grounds. Dynamics, depth and three dimensional sound stages with natural tonality will bring the realism to your living room. Introduced at the AXPONA show and will be shown at the TAVES Show in Toronto.

Momentus Duo-Drive Turntable Summary Specifications

Footprint 26” x 18 “Motor located to left of table - Footprint 23”x23”Motor located at the rear of table

Total Weight: 127 lbs (56Kg’s) single arm pod up to 163 lbs (74Kg’s) with 3 arm pods

Modular Decoupled Design for easy set up and silence – heaviest component is 42 lbs

Remote Motor - Duo-Drive System operates in Direct RIM or Tri-Belt Operation @ 20lbs

Silent Drive Ultra Duo-Drive Controller @ 5 lbs with Duo Drive Wheel and Tri Belt Pulley Kit

Exclusive Acetal Outer Rim Drive Decoupled Platter or ™Tri-Belt Drive @ 30lbs

VTA Adjustable Remote Tone Arm Pod

The Diamond Lapped Micro Carbide bearing shaft

MIC6 Plinth - Billet CNC machined contoured MIC-6 Aluminum Plinth @ 42 Lbs

Self Easy Lock Height Adjustable Isolation Piers @ 12lbs total 

™Remote Motor - Silent Drive Motion Control Duo-Drive System operates in Direct RIM or Tri-Belt Operation

The heartbeat is the silent powerful brushless DC motion controller motor provides low torque start ups with improved braking and easier set up.

The two component motor separates the electronic controls from the motor and the solid 18.8 lb (8.5 Kg’s) Carbon Steel Motor Housing provides superb vibration free operation. The final housing and is shot peened for rigidity and powder coated for beauty. The motor is bolted internally with four ¼ - 20 Allen bolts in to a .800 thick top plate. The extreme precision of both the motor and the tolerances in the machined components provide extremely quiet and accurate speed control.

The base features a fully inset ¼ inch silicone damping o-ring is inset specially machined grooves in the polycarbonate base for isolation and superb coupling to any surface. The control board enables super precise acceleration control allowing the use of a pure silicone single drive wheel. This provides improved coupling and reduced noise transfer. 

™Silent Drive Ultra Duo-Drive Controller

Duo Drive Selection (rear panel select belt or rim mode) with speed selector 33.333/45 RPM and 78 Can be set also set

Platter ON/OFF aircraft grade power switch(s) with  separate speed control (10x Fine pots) for each the 33.333 and 45 RPM.  The power Supply is a Universal Voltage 100 to 400V transformer 6.5 AMP, 24 Volt output Built in AC line filters for extreme low noise and XLR connector(s) and standard HD grounded power cord 4ft

 ™ Duo Drive Wheel and Tri Belt Pulley Kit

The System includes 303 SST rim drive pulley with (3) silicone drive rings, the 303 SST Tri-Belt Pulley with 6 Drive Belts for rim to belt change over in less than 30 minutes.

™Exclusive Acetal Outer Rim Drive Decoupled Platter or ™Tri-Belt Drive

The exclusive Acetal Outer Rim Drive and the extreme tolerances required to run the rim drive system easily provided a top flight high tension Belt Drive System. The final selection of belt or rim is a personal choice – you have two drives in one; both more effective than other turntables by design, tolerances and passion. This is the most unique decoupling system ever designed for a record player. The 13.5 inch Acetal Rim ™Drive is mated to the main platter with special tension fit installation. This provides a mechanical decoupling from the driven rim to the record platter.

High mass 30 lb Platter x 1.75 Inches Height (44.5 mm) with constrained layer platter design employing Aluminum, Alloy/copper and carbon fibre with (7) components of decoupling

Extreme accuracy and cutting edge design platter rim Total Indicator Run-out (T.I.R.) not exceeding .0005 inches, each component is CNC machined laminated to one another providing non mechanical coupling.  The record Interface is the ULTIMAT Record Mat with Carbon fibre top mat.

™Exclusive Acetal Outer Rim Drive Decoupled Platter or ™Tri-Belt Drive

The exclusive Acetal Outer Rim Drive and the extreme tolerances required to run the rim drive system easily provided a top flight high tension Belt Drive System. The final selection of belt or rim is a personal choice – you have two drives in one; both more effective than other turntables by design, tolerances and passion. This is the most unique decoupling system ever designed for a record player. The 13.5 inch Acetal Rim ™Drive is mated to the main platter with special tension fit installation. This provides a mechanical decoupling from the driven rim to the record plas 30 lb Platter x 1.75 Inches Height (44.5 mm)

Constrained layer platter design employing Aluminum, Alloy/copper and carbon fibre with (7) components of decoupling

Extreme accuracy and cutting edge design platter rim Total Indicator Run-out (T.I.R.) not exceeding .0005 inches

Each component is CNC machined laminated to one another providing non mechanical couplirface is the ULTIMAT Record Mat with Carbon fibre top mat

™VTA Adjustable Remo

™VTA Adjustable Remote Tone Arm Pod - 18 lbs

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The arm post is polished aluminum piston that slides up and down in the base by hand with .100 graduation lines for precise adjustment of your VTA and optimizing the height of the tone arm for maximum rigidity. The piston is supported by an air cushion that moves gradually and safely when unlocked, with precision. Delrin arm pods allow DYI mounting or pre machined from the factory.

™The Diamond Lapped Micro Carbide bearing shaft

The bearing is no contact oil bath design employing a diamond polished carbide bearing shaft .5000 inch with carbide thrust bearing. Our aircraft style bearing is housed in massive 3.50 inch (8.89 mm) diameter brass oil well housing. Each hand built assembly is shrink fit assembled, micro bored to +/-.0001, ( +/- .00254 mm) roundness >.0001( > .00254 mm) parallelism ( +/- .00254 mm) with a .0003 inch (.0076 mm) run-out from bearing, .0005 inch (.0381 mm) maximum run out from centerline to outer diameter of the platter.th design employing a diamond polished carbide bearing shaft .5000 inch with carbide thrust bearing. Our aircraft style bearing is housed in massive 3.50 inch (8.89 mm) diameter brass oil well housing. Each hand built assembly is shrink fit assembled, micro bored to +/-.0001, ( +/- .00254 mm) roundness >.0001( > .00254 mm) parallelism ( +/- .00254 mm) with a .0003 inch (.0076 mm) run-out from bearing, .0005 inch (.0381 mm) maximum run out from centerline to outer diameter of the platter

™MIC6 Plinth - Billet CNC machined contoured MIC-6 Aluminum Plinth – 42 Lbs

Mass Dampened Plinth CNC machined plinth from billet MIC-6 Aluminum

14 x 16 dimensions @ 40 lbs

Resonance tuned shape (dog bone) radius on all corners

Entire surface is shot peened to improve surface tensile strength

Black powder coating   

™Self Easy Lock Height Adjustable Isolation Piers

Our unique self locking 4 piers are machined from solid 6061 Aluminum providing ½ inch height adjustment and are self locking.  The unique 4 piece designs provide superb decoupling from the stand and the environment with separate platform discs with o-ring bases. The pier locks to the disk with a ball bearing system for absolute table positioning.

 Specifications may change without notice, specifications dated July 2011