Acoustic Solid - Solid Machine Small R Turntable

Package 1 contains WTB-370 Tonearm Only! No Cartridge! Microcontroller motor control M3 with crystal oscillator

Package 2 contains WTB-213 Tonearm Only! No Cartridge! Microcontroller motor control M3 with crystal oscillator

The Solid Machine Small R is a dual-belt string-drive reference turntable from Acoustic Solid (Germany), available at Vinyl Sound in Toronto, Canada. Positioned between the Solid 311 Metal and the flagship Solid Machine, the Small R is built around a 10 kg, 50 mm thick platter machined from a single billet of aluminum, housed in a 35 mm thick aluminum plinth weighing 22 kg without tonearm. Drive is provided by a Berger Lahr synchronous motor with dual-belt configuration and a separately housed motor unit, governed by the upgraded Microcontroller M3 with quartz crystal oscillator — a step above the M2 used in the rest of the Metal series — achieving speed synchronization of 0.08% as measured with an Ortofon measuring computer. The plinth accepts up to three tonearms simultaneously as standard. Available in Package 1 with the WTB-370 tonearm or Package 2 with the WTB-213 tonearm — cartridge not included. Finish options are polished or aluminum matte.

Single-Billet Aluminum Platter and Dual-Belt Drive

The Small R's 10 kg, 50 mm thick platter is machined from a single continuous billet of aluminum — a manufacturing approach that eliminates the structural joints and potential resonance paths present in multi-piece platter assemblies. CNC-precision turned and hand-polished, the platter is dressed with a genuine leather mat and a 3 mm Plexiglas pad at the record interface. Drive is delivered via two Nylon-silicone belts from a separately housed Berger Lahr synchronous motor, distributing rotational force across two contact points on the platter circumference and reducing the net lateral load on the bearing from belt tension. The motor is housed independently from the plinth, further isolating motor-induced vibration from the platter and bearing assembly.

Microcontroller M3 and Triple Tonearm Plinth

The Small R introduces Acoustic Solid's upgraded Microcontroller M3 with quartz crystal oscillator — an improvement over the M2 used across the Solid 110, 111, 311, and Brake models — with the same one-touch 33.3 and 45 rpm switching and real-time fine adjustment without interrupting playback. The 35 mm thick aluminum plinth shares its architecture with the flagship Solid Machine, including provision for three separate tonearm mounting bases as standard, enabling simultaneous use of multiple tonearms and cartridge combinations. Three individually adjustable feet, each decoupled by Teflon discs and silicone mixture dampers, provide precise leveling on any surface. The stainless steel bearing axle sits in a cast liner and cast bearing bottom with Teflon decoupling and a polished ceramic ball at the contact point.

Key Features

• Single-Billet 10 kg Aluminum Platter: 50 mm thick platter machined from a single aluminum billet, eliminating structural joints and resonance paths present in multi-piece designs, CNC-turned and hand-polished.
• Dual-Belt Drive with Separately Housed Motor: Two Nylon-silicone belts from an independently housed Berger Lahr synchronous motor distribute rotational force evenly and isolate motor vibration from the platter and bearing.
• Upgraded Microcontroller M3: An improved quartz crystal oscillator motor control system, stepping above the M2 used across the rest of the Acoustic Solid Metal series, with real-time fine adjustment at 33.3 and 45 rpm.
• Triple Tonearm Plinth: 35 mm thick aluminum plinth with provision for three simultaneous tonearm mounts as standard, shared with the flagship Solid Machine.
• 22 kg Chassis Weight: Heavier than the Solid 311 Metal and Solid Brake in plinth rigidity terms, with a compact 310 x 310 mm footprint identical to the smaller Metal series models.
• 35 mm Aluminum Plinth: Three individually adjustable feet, each decoupled by Teflon discs and silicone mixture dampers, for precise leveling and multi-stage resonance isolation.
• Polished Ceramic Ball Bearing: Ground stainless steel axle with cast liner, Teflon decoupling, and polished ceramic ball contact point for low-friction, low-noise rotation.
• Genuine Leather and Plexiglas Platter Mat: Leather mat with 3 mm Plexiglas pad for optimal record contact and vibration damping at the record surface.
• Two Finish Options: Available in polished or aluminum matte finish.
• Two Tonearm Packages: Available with the WTB-370 (Package 1) or WTB-213 (Package 2) tonearm — cartridge not included.

Technical Specifications

Frequently Asked Questions

What is the Acoustic Solid Solid Machine Small R?

The Acoustic Solid Solid Machine Small R is a dual-belt string-drive turntable from Acoustic Solid of Germany, featuring a 10 kg, 50 mm thick single-billet aluminum platter, a 35 mm thick aluminum plinth with triple tonearm mounting capability, and the upgraded Microcontroller M3 quartz crystal speed control. It weighs 22 kg without tonearm, fits within the compact 310 x 310 mm footprint of the smaller Metal series models, and is available in polished or matte finish.

What is the difference between the Acoustic Solid Solid Machine Small R and the Solid Machine?

The Small R and the flagship Solid Machine share the same 35 mm aluminum plinth architecture, triple tonearm mounting capability, and separately housed motor concept. The Solid Machine steps above with a heavier 12.5 kg, 60 mm thick platter, a triple-belt drive system, and a tighter 0.06% synchronization figure. The Small R uses a 10 kg, 50 mm single-billet platter with dual-belt drive and achieves 0.08% synchronization, while introducing the upgraded M3 controller and fitting within a more compact 310 x 310 mm footprint — making it the entry point into Acoustic Solid's Machine-class architecture.

What is the Microcontroller M3 and how does it differ from the M2?

The Microcontroller M3 is Acoustic Solid's upgraded motor control system introduced on the Solid Machine Small R, stepping above the M2 used across the Solid 110, 111, 311, and Brake models. Both use a quartz crystal oscillator as the speed reference and offer one-touch 33.3 and 45 rpm switching with real-time fine adjustment. The M3 represents a refined generation of the same control philosophy, with improved circuit implementation for more stable motor governance at the quartz reference frequency.

Can the Acoustic Solid Solid Machine Small R run three tonearms simultaneously?

Yes. The Small R's 35 mm aluminum plinth includes provision for three separate tonearm mounting bases as standard, identical in capability to the flagship Solid Machine. This allows simultaneous installation of three tonearms with different cartridges — for example, a moving magnet, a moving coil, and a mono cartridge — enabling instant switching between setups without stylus changes or remounting.

Does the Acoustic Solid Solid Machine Small R come with a cartridge?

No. Both Package 1 (WTB-370 tonearm) and Package 2 (WTB-213 tonearm) are supplied without a cartridge, allowing the buyer to select cartridges suited to each tonearm and phono stage. Vinyl Sound Toronto can advise on cartridge pairing for any of the three tonearm positions.

Where can I buy the Acoustic Solid Solid Machine Small R in Toronto or Canada?

The Acoustic Solid Solid Machine Small R is available in Toronto, Canada at Vinyl Sound, an authorized Acoustic Solid dealer. Vinyl Sound's team can assist with tonearm package selection, cartridge recommendations, phono stage matching, and full setup support.