Our most advanced turntable yet
Seriously detailed playback
Introducing our OA3 Pro Tonearm. One-piece magnesium armtube is light yet rigid for exceptionally low resonance. Upgraded gimbal bearing allows for near-frictionless tonearm movement. Easily adjustable for flawless tracking.
Loaded with upgrades
Sorbothane-damped feet. Grooved acrylic platter. Machined aluminum spindle. Every detail has been thoughtfully designed to elevate your listening experience.
Exclusively on Theory
Enhanced tonearm adjustability
Adjustable anti-skate and dial counterweight make it easy to fine-tune performance.
Ultra-quiet motor
Theory’s motor uses heavy-duty magnets to minimize vibration and ensure near silent operation.
Upgraded gimbal bearing
OA3 Pro features a high-precision bearing design with all stainless steel components.
Aluminum spindle and pulley
Machined from aircraft-grade alloy for increased precision and durability.
Easily adjustable for flawless tracking
Fine tune your tonearm to optimize cartridge performance. OA3 Pro’s dial counterweight allows you to set tracking force without a stylus gauge. And its adjustable anti-skate uses a hinged weight to apply consistent force across the entire record surface.
Precision engineered from the inside out
OA3 Pro’s upgraded gimbal bearing allows the tonearm to move with exceptional freedom. Both the bearing shaft and housing are machined from stainless steel and threaded for highly precise axial preload. This means less resonance in the tonearm and near-frictionless movement across the record.
Pinpoint speed accuracy
Theory features a DC-powered sine wave generator system that monitors and adjusts speed thousands of times per second. Our advanced motor controller utilizes a crystal oscillator to drive the ultra-quiet motor with pinpoint accuracy. The result? Minimal wow & flutter and no motor noise during playback.
Rumble
-72 dBA
Wow & Flutter
<0.1%
Orbit’s new groove
Our frosted acrylic platter is grooved to keep the belt in place. All platter surfaces are precision machined for ultimate flatness and virtually zero runout. The platter rotates on a machined aluminum spindle and inverted main bearing with self-lubricating polymer bushings.
Less vibration. More clarity.
Theory’s adjustable Iso-Level Feet are constructed out of aluminum and layered with Sorbothane – the gold standard for vibration isolation. Preventing vibrations from reaching the stylus lets you hear the most subtle details of your music with outstanding clarity.
Plug and play
Optional built-in phono preamp lets you connect to your favorite components. Featuring Pluto 2 technology with low-noise circuitry and high quality components like WIMA film capacitors and precision resistors.
Hand assembled in the USA
Our expert technicians assemble and test every turntable in our Woburn, MA workshop – allowing us to deliver a consistently high level of quality.
Expert support from real people
Whether you're a first-time vinyl listener or a seasoned audiophile, we’ll help you choose, set up, and care for your sound system. We stand by our turntables with a comprehensive 3 year warranty and 30 day return policy.
