Oracle Audio Delphi MkVII Reference Turntable

The Oracle Audio Delphi MkVII Reference is the Delphi on Oracle's heaviest granite base to date: just over 38 pounds, thicker and heavier than any granite base Oracle has offered before. It ships only with the Turbo MkII power supply, calibrated to 24.35 volts DC, over the same MkVII platform as the Delphi MkVII Classic: MVSS damping, a dual tripod bearing and a 4 kg two-piece platter.

Oracle's case for the granite is anchoring. A heavier base ties the suspended Delphi more firmly to its surroundings, and Oracle reports more detail across the spectrum, imaging with more perspective and clarity, and more authority in the bass. It is the one Delphi MkVII that changes the foundation and the power supply at once.

Key Features of the Oracle Audio Delphi MkVII Reference Turntable

• 17 kg Granite Base: Oracle's custom-built MkVII Reference base, just over 38 pounds, thicker and heavier than any granite base Oracle has offered before.
• Turbo MkII Power Supply Included: The only supply offered with the Reference. Ripple is under one millivolt, and a fine-trim potentiometer calibrates the output to 24.35 volts DC.
• Micro Vibration Stabilizer System (MVSS): Tapered plungers under the sub-chassis sit in silicone reservoirs beside each suspension tower, damping micro vibrations inside the floating sub-chassis.
• Dual Tripod Bearing: Six precision PEEK screws in two offset tripods center the spindle, and a tungsten carbide ball tip rides on a Glass Filled Torlon thrust plate.
• Two-Piece Platter Assembly: The belt fits around the light inner hub before the 4 kg main platter goes on, so the bearing calibration stays intact and platter resonances drop.
• 4 kg Machined Platter: 6061T6 aluminum-magnesium alloy, diamond-cut, with its mass at the outer edge for flywheel effect.
• Tri-Pedal Suspension: Three towers, each with 12 components and 7 mechanical filters.
• Expanded Sub-Chassis: 3.9 kg of hand-brushed aluminum, skeletal design, with the tonearm mounting ring support widened by about 35 percent.
• Factory-Calibrated AC Synchronous Motor: Impedance-matched coils, military-grade capacitors and dual current drive circuitry, set at the factory.
• Pre-Cut Tonearm Board: Accommodates almost any 9-inch tonearm. Tonearm and cartridge are not included.

What Does the Granite Base Add Over the Delphi Classic?

Mass. The Reference replaces the Classic's clear acrylic base with Oracle's custom-built 17 kg granite base, just over 38 pounds and the thickest, heaviest granite base Oracle has made. Oracle says the extra mass anchors the Delphi better to its environment, with more detail across the spectrum, clearer imaging and more authority and volume in the bass.

Everything above the base is shared with the Classic, so the granite is the variable you are paying for, together with the Turbo MkII. It also changes the weight: the Reference comes to 30.9 kg (68 lbs) in total, against 16 kg for the acrylic-base Classic, so plan the rack for it.

Why Does the Reference Come With the Turbo MkII?

Because Oracle offers no other supply on this model. The Turbo MkII brings ripple down to under one millivolt, from 120 millivolts on the first Turbo, which Oracle names as the main source of its sonic gain, and a fine-trim potentiometer calibrates the output to 24.35 volts DC for a smoother, lower-vibration motor.

The original Turbo arrived with the Delphi MkV in 1996. Oracle developed the MkII against other reference sources, special batteries among them, and says it outperformed them all. It is an outboard box, 210 x 184 x 70 mm, with a removable power cord. On the Classic it is an option; here it is in the box, and the same supply is sold separately as the Turbo Power Supply.

Can the Granite Base Upgrade an Older Delphi?

Yes. Oracle sells the MkVII Reference granite base as an upgrade for existing Delphi MkV and MkVI turntables, so an older Delphi can take the same foundation without replacing the whole deck. If you own one of those and want the base rather than a new turntable, send Mike your serial number and he will confirm the fit with Oracle.

What Does the MVSS Do on the Delphi MkVII?

The Micro Vibration Stabilizer System damps vibration inside the floating sub-chassis, where the granite and the suspension cannot reach. Three tapered plungers under the sub-chassis dip into silicone reservoirs beside the suspension towers. Each full turn moves a plunger 1.27 mm, and Oracle's best results came at 1 1/2 to 2 turns, 1.90 to 2.54 mm deep.

That internal energy comes from the stylus tracing the groove, the bearing and the motor. Left alone, it reflects back to the stylus. The MVSS captures it without short-circuiting the suspension, and Oracle calls it the single most significant improvement made to its turntable since 1979. The plungers lock in place with a threaded ring once they are set by ear.

Bearing, Two-Piece Platter and Drive

The dual tripod bearing uses six precision PEEK screws: three at the top, 120 degrees apart, and three at the bottom, offset 60 degrees. A tungsten carbide ball tip rests on a non-metallic Glass Filled Torlon thrust plate, which Oracle credits with limiting the noise the spinning platter generates. The 4 kg platter is 6061T6 aluminum-magnesium alloy.

The platter comes in two pieces, a light inner hub and the main ring. The belt goes on the hub first, then the ring is lowered on top, so the bearing calibration is never disturbed, and the coupling of the two reduces platter resonances. Most of the mass sits at the outer edge for a flywheel effect, and the finish is diamond-cut. Oracle's record clamp and a hard acrylic mat, formulated to match the vinyl disc, come standard.

The motor is a low-voltage AC synchronous unit with impedance-matched coils. Its drive module is a precision frequency generator with military-grade capacitors and a calibration stage for the positive and negative sine wave voltages, and dual current drive circuitry gives full torque at start-up and minimum energy while running. A molded belt drives the platter at 33 1/3 and 45 RPM, and Oracle sets every calibration at the factory.

Suspension and the Floating Sub-Chassis

Three suspension towers carry the sub-chassis, platter and tonearm, each combining 12 components and 7 mechanical filters. The springs are color coded by strength (yellow, red, green and blue), and a counterweight on the sub-chassis adds mass at the front left tower to balance the tonearm. The sub-chassis is 3.9 kg of hand-brushed, clear-lacquered aluminum.

It is larger than earlier generations for better weight and mass distribution and a more accurate suspension calibration, its legs are shorter, and the tonearm mounting ring support is about 35 percent wider for rigidity. The counterweight also helps reduce resonances inside the sub-chassis.

Which Tonearms and Dust Covers Fit the Reference?

The Reference comes with a pre-cut tonearm board that Oracle says accommodates almost any 9-inch tonearm; tonearm and cartridge are not included. Dust covers are chosen on this listing: none, a hinged clear acrylic cover with aluminum hinges, or Oracle's Full Dome cover, which covers the whole turntable and measures 19.75 x 15.25 x 8.5 inches.

Oracle's own Reference Tonearm is the natural companion at this level, and the Paris Tonearm also fits. The suspension is balanced to the arm's mass with the sub-chassis counterweight and the choice of springs, so the arm is part of the setup rather than an afterthought. The Full Dome lifts clear rather than hinging and ships in a separate box; the Full Dome cover is also sold on its own.

Personalized Setup Included with Your Oracle Audio Purchase

"I personally ensure every Oracle turntable purchase includes my hands-on setup at your location, no matter where you are. That's correct, I will drive or fly to you. This personalized setup ensures that your Oracle turntable performs at its absolute best, tailored to your space and system."

The Listening Room Difference

We're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on exceptional service and relentless passion for hifi. At this level, every detail matters, and we're here to make sure you get it right. Whether you need help with system matching, setup guidance, or just want to talk through your options before pulling the trigger, owner Mike Hoatson is a phone call away. We don't just ship boxes. We help build systems, and our support lasts well beyond the sale. Call or text 410-239-2020.

Oracle Audio Delphi MkVII Reference Turntable Specifications