The Dual CS 518 uses a belt drive system. In this topology, an elastomer belt links the motor pulley to the platter rather than coupling the motor directly to the platter spindle. The practical advantage is mechanical isolation: the belt acts as a compliant filter, absorbing a substantial portion of the motor's higher frequency vibration and cogging artifacts before they can reach the platter and, ultimately, the stylus. Because those disturbances are attenuated by the elasticity of the belt, less motor noise is transmitted into the groove modulation the cartridge is trying to read. The tradeoff, familiar to any experienced listener, is that belts can introduce their own speed variability over time as they age and lose elasticity, which is why belt condition matters for maintaining the rated performance figures.
How does the decoupled synchronous motor work?
The CS 518 employs a decoupled synchronous motor. A synchronous motor locks its rotational speed to the frequency of the AC supply, which gives it inherently stable rotation tied to a fixed reference rather than relying purely on load conditions. The word decoupled is the key detail here: the motor is mechanically isolated from the plinth structure, so its residual vibration is not rigidly transmitted into the chassis and platter assembly. This combination pairs well with the belt drive philosophy. The synchronous motor provides the speed reference, the decoupling mount handles structure borne vibration, and the belt handles the final layer of isolation between motor and platter. Together these three elements form the core of how this turntable keeps mechanical noise out of the signal path.
What speeds does the turntable support?
The CS 518 supports 33 1/3 and 45 RPM. These are the two standard speeds needed for the vast majority of vinyl records, covering full length LPs at 33 1/3 and most singles and many audiophile reissues cut at 45. Speed selection on a belt drive of this design is typically handled by moving the belt between different diameter steps on the motor pulley or by an electronic speed control, and the fixed reference of the synchronous motor is what allows each speed to remain stable once selected. There is no 78 RPM option listed, so shellac era playback is outside this deck's intended scope.
Speed Accuracy and Noise Performance
What does the 0.06 percent wow and flutter figure mean?
The wow and flutter specification is 0.06 percent, which describes how much the playback speed deviates from perfect constancy. Wow refers to slow speed variations, roughly below a few hertz, that are audible as pitch drifting on sustained notes such as piano or organ. Flutter refers to faster variations that manifest as a slight roughness or waver on the same kinds of sustained tones. A figure of 0.06 percent is a low number for a belt drive turntable in this class, and in practical listening it means that pitch stability should not be a distraction on most program material. The combination of the synchronous motor's fixed speed reference and the mechanical filtering of the belt is what makes this level of consistency achievable.
What does the 72 dB signal to noise ratio tell us?
The signal to noise ratio is 72 dB, which quantifies how far the desired musical signal sits above the residual noise floor of the turntable system. A higher number indicates a quieter background against which the music plays. At 72 dB, the mechanical and electrical noise contributions of the deck are kept well below the level of typical recorded content, so the noise floor should generally recede below the surface noise of the record itself and the ambient noise of your listening room. In interpreting this figure, remember that it reflects the turntable's own contribution; the actual audible quietness you experience also depends on record condition, cartridge alignment, and the gain structure of the rest of your chain.
Tonearm and Cartridge
What kind of tonearm is fitted to the CS 518?
The CS 518 uses an S-shaped aluminum tonearm with a detachable headshell. The S-shaped geometry is a classic approach that helps set the correct offset angle so the stylus tracks the groove with an appropriate tangency across the record surface, reducing tracking error compared to a poorly aligned straight arm. Aluminum is a sensible material choice because it offers a favorable balance of low mass and adequate rigidity, which keeps the arm's effective mass in a range suited to a wide selection of moving magnet cartridges. The detachable headshell is a meaningful feature for an enthusiast: it lets you mount a second cartridge on a spare headshell and swap between them quickly, or replace the headshell entirely, without disturbing your primary alignment each time.
Which cartridge comes installed?
The CS 518 ships with an Ortofon 2M Red moving magnet cartridge. The 2M Red is a widely used entry into the well regarded 2M series and uses a moving magnet generator, meaning small magnets attached to the cantilever move within fixed coils to produce the output signal. Moving magnet designs are convenient because they typically offer higher output than moving coil types and allow user replacement of the stylus assembly. Because the 2M Red is a moving magnet cartridge, it pairs directly with the moving magnet stage built into this turntable, giving you a complete and correctly matched front end out of the box. As your tastes evolve, the 2M series offers upgrade paths that can drop into the same body.
Chassis, Platter, and Materials
What is the platter made of and why does it matter?
The platter is aluminum. An aluminum platter offers a good balance of mass and manufacturing precision, providing rotational inertia that helps smooth out minor speed variations while remaining dimensionally consistent. That flywheel effect from the platter's mass works in concert with the synchronous motor and belt to sustain the low wow and flutter figure noted eardier. Aluminum is also nonmagnetic, which is desirable directly beneath a magnetic cartridge, and it can be machined to tight tolerances so the record sits flat and concentric with the spindle.
What material is the plinth?
The plinth is made of MDF. Medium density fiberboard is a common choice for turntable bases because it is dense, dimensionally stable, and has useful internal damping characteristics that help suppress resonances compared to some solid woods or thin metal chassis. A well damped plinth matters because it forms the foundation that supports the motor, bearing, and tonearm, and any resonance in that structure can find its way into the signal. The MDF plinth here provides a stable, damped platform for the decoupled motor and the tonearm assembly.
How do the height adjustable feet contribute to performance?
The feet are height adjustable. This lets you level the turntable precisely on a surface that may not be perfectly flat, which is important because a level platter ensures even tracking force distribution and consistent anti-skating behavior across the record. Adjustable feet also allow you to fine tune the deck's stance to compensate for an uneven shelf or cabinet. Proper leveling directly affects how the stylus sits in the groove, so this is a functional adjustment rather than a cosmetic one.
Operation and Automation
What does semi-automatic operation with auto shutoff mean?
The CS 518 offers semi-automatic operation with auto shutoff. Semi-automatic means you start playback manually, cueing the arm onto the record yourself, but the turntable handles the end of the record automatically. When the stylus reaches the run out groove, the auto shutoff function stops the platter so the record is not left spinning indefinitely and the stylus is not subjected to unnecessary wear in the lead out. This approach preserves the tactile, hands on cueing that many enthusiasts prefer at the start of a side while removing the need to jump up when a side ends, and it protects both stylus and record from being left running.
Connectivity and System Integration
Does the CS 518 have a built-in phono preamp?
Yes, the CS 518 includes a built-in, switchable moving magnet phono preamp. A phono preamp performs two essential jobs: it boosts the very low output of the cartridge up to line level, and it applies the RIAA equalization curve that reverses the frequency shaping applied when the record was cut. Because this stage is designed for moving magnet cartridges, it matches the included Ortofon 2M Red perfectly. The presence of an onboard stage means you can connect the turntable to an amplifier or powered speakers that lack a dedicated phono input, simplifying system integration considerably.
How does the bypassable phono stage work?
The built-in moving magnet stage is bypassable via a rear switch. This switch lets you choose between two operating modes. In the phono position, the internal stage is active and the turntable outputs a line level signal ready for any standard line input. In the bypass position, the internal stage is taken out of the circuit and the turntable outputs the raw, low level cartridge signal, which you would then feed into an external phono preamp or the phono input of an amplifier. This flexibility is important for an experienced user who may already own a preferred outboard phono stage and wants to use it instead of the onboard electronics. The rear switch makes that decision without requiring any internal modification.
How should you connect the CS 518 into a system?
Connection is determined by the rear phono switch setting, so plan your routing around it. If you set the switch to the built-in phono stage, run the turntable's output to any line level input on your amplifier, receiver, or powered speakers, since the signal is already amplified and equalized. If you set the switch to bypass, run the output to a dedicated phono input or an external moving magnet phono preamp, because the signal still needs amplification and RIAA correction. In either configuration, follow good practice by keeping the cable runs reasonable and ensuring a solid ground connection to minimize hum, which is especially relevant when using the low level bypass mode where the signal is more vulnerable to interference. Matching the switch position to the input you are feeding is the single most important step in integrating this turntable correctly.
