How does the direct drive system on the CS 618Q work?
The Dual CS 618Q uses a direct drive motor, meaning the platter sits atop and is driven directly by the motor spindle rather than through a belt or idler wheel. In this topology the motor shaft is the platter bearing axis, so torque is delivered to the platter with no intermediate compliance. The practical consequence is immediate startup, strong speed stability under stylus drag, and the elimination of the belt as a wear item and as a variable in long term maintenance. Direct drive designs rely on the motor's own servo electronics to regulate rotation, which brings us to the speed stability figures below. For an experienced listener, the trade you evaluate with direct drive is motor noise and cogging behavior against the belt's mechanical filtering, and here the CS 618Q leans on precise servo control to keep the platter locked to the target rate.
What speeds does the CS 618Q support and how are they selected?
The turntable plays records at 33 1/3 and 45 RPM, covering the two speeds that account for essentially all LP and 7 inch single playback. Because this is a direct drive design, speed selection is handled electronically through the motor servo rather than by physically repositioning a belt on a stepped pulley. That is a meaningful convenience difference from belt tables that require you to lift the platter to change speeds. The two supported speeds mean you can move between full length albums and 45 RPM pressings without any mechanical intervention, and the servo simply targets a new rotational setpoint.
What does the wow and flutter specification tell us about performance?
The CS 618Q is rated at less than plus or minus 0.07 percent wow and flutter, a figure that quantifies short term speed deviations of the platter. Wow refers to slower pitch variations and flutter to faster ones, and both are perceived by the ear as instability in sustained tones, most audible on piano and sustained vocal notes. A figure under plus or minus 0.07 percent indicates that the direct drive servo is holding rotation tightly enough that pitch drift should not be an audible concern in normal listening. Interpreting this measurement, you should expect stable pitch on demanding material, and the number is consistent with a competent direct drive implementation where the servo continuously corrects the motor to counter stylus drag and mechanical variation. It is worth remembering that this is a specified maximum deviation, so real world figures often sit comfortably inside that boundary.
Automation and Operational Controls
What does semi-automatic operation mean on this deck?
Semi-automatic operation on the CS 618Q means the turntable automatically lifts the tonearm and stops the platter at the end of a side, while you initiate playback manually. This is a deliberate middle ground between fully manual decks, which require you to cue and return the arm yourself, and fully automatic tables that start and return the arm without intervention. The benefit for an enthusiast is twofold. First, the end of side auto lift protects both the stylus and the record groove from the wear that occurs when a needle rides the runout groove indefinitely, which matters if you occasionally step away or fall asleep during a listening session. Second, because you still cue the arm down yourself, you retain the tactile control and the minimal added mechanical complexity in the cueing path that manual users prize. The mechanism senses the arm reaching the inner groove and triggers the lift and shutdown, so the platter is not left spinning after the music ends.
Tonearm and Cartridge
What kind of tonearm does the CS 618Q use?
The CS 618Q is fitted with a precision tonearm that has been tuned for the supplied cartridge. Tonearm and cartridge behave as a coupled mechanical resonant system, and the arm's effective mass interacts with the cartridge's compliance to set a resonant frequency that ideally lands in the window between record warp frequencies and the audio band. By tuning the arm specifically for the included cartridge, Dual has matched the arm's effective mass to that cartridge's compliance so the pairing sits in a favorable resonance region out of the box. For the experienced user this removes a common source of mismatch, since a random arm and cartridge combination can place resonance too low or too high and manifest as poor tracking or a warp induced woofer pumping. The arm supports the cartridge through playback and is the same assembly that the semi-automatic mechanism lifts at the end of the side.
What cartridge ships with the CS 618Q?
The turntable comes with the Ortofon 2M Blue, a moving magnet cartridge, mounted and aligned. A moving magnet cartridge generates its signal by moving a small magnet within fixed coils as the stylus tracks the groove, and this design is characterized by a relatively high output level that is friendly to standard moving magnet phono stages. Because the arm has been tuned for this exact cartridge, the geometry and mass matching are already handled, so you can play records without sourcing and aligning a cartridge yourself. The 2M Blue is a well regarded performer in its class, and shipping it pre installed means the deck arrives as a coherent, ready to use system rather than a chassis awaiting configuration.
What type of stylus does the included cartridge use?
The 2M Blue uses a nude elliptical stylus. Elliptical geometry means the diamond contacts the groove wall along a narrower profile than a spherical tip, allowing it to trace higher frequency modulation and inner groove detail more accurately. The nude construction means the diamond is a single solid piece mounted directly to the cantilever, as opposed to a bonded tip where a small diamond is affixed to a metal shank. A nude stylus has lower tip mass, which improves the cantilever's ability to follow rapid groove modulations and can reduce distortion, particularly toward the end of a side where groove velocity relative to the stylus is lower and tracing errors become more audible. For the listener this translates to better high frequency retrieval and cleaner inner groove tracking than a comparable bonded spherical design would provide.
Platter and Materials
What is the platter made of and why does that matter?
The CS 618Q uses an aluminum die-cast platter. Die casting produces a platter with consistent mass distribution, which is important because an evenly balanced platter maintains smoother rotation and contributes to the low wow and flutter figure already discussed. Platter mass also acts as a flywheel, storing rotational energy that helps the system resist the momentary speed changes caused by stylus drag as it moves through heavily modulated passages. Aluminum is a rigid, non magnetic material, which is a sensible choice on a direct drive design where the platter sits directly over the motor. The die-cast process gives the platter its dimensional consistency, and combined with the servo controlled motor it forms the mechanical foundation for stable playback.
Phono Stage and System Integration
Does the CS 618Q have a built-in phono preamp?
Yes, the CS 618Q includes a built-in phono preamp for moving magnet cartridges. A phono preamp performs two essential jobs. It boosts the low output of the cartridge up to line level, and it applies the RIAA equalization curve that reverses the frequency shaping applied during record mastering. Because the included 2M Blue is a moving magnet cartridge, the built-in stage is matched to the cartridge type in the box, so no external phono electronics are required to get sound into a system. This makes the deck flexible for both simple and more advanced setups, since you can rely on the internal stage or bypass it depending on your electronics.
How does the defeatable phono stage work and when would you bypass it?
The built-in moving magnet phono stage is switchable and can be defeated using a rear push-button. When the button engages the internal stage, the turntable outputs a line level signal that you can send to any standard line input such as an aux or line input on an amplifier or receiver. When you press the button to defeat the internal stage, the turntable instead outputs the raw low level phono signal, which you then route to a dedicated phono input on your amplifier or to a separate external phono preamp. For an experienced enthusiast this switch is the key to system integration flexibility. If you already own a phono stage whose sonic character you prefer, you defeat the internal circuit and use your own. If you are connecting to a system that lacks a phono input, you leave the internal stage active and use a line input. The rear push-button placement keeps this as a set and forget configuration choice rather than a frequently toggled control, since you generally decide once based on your downstream electronics.
How do you connect the CS 618Q to the rest of your system?
Connection depends entirely on the position of the rear phono stage push-button, and that single switch determines what kind of input on your amplifier the turntable expects. With the internal moving magnet phono stage active, you connect the turntable's output to a line level input, since the deck is delivering an already amplified and equalized signal. With the internal stage defeated, you connect to a phono input or to an external phono preamp, because the deck is now passing the unamplified cartridge signal that still needs RIAA equalization and gain. The important discipline here is to match the switch position to the input you use. Sending a line level signal into a phono input, or a phono level signal into a line input, will produce either gross overload or an anemic, incorrectly equalized sound. Once you set the switch to match your amplifier's input, the CS 618Q integrates cleanly as either a plug and play line source or as a traditional phono source feeding your preferred phono electronics.
What kind of listener is the CS 618Q best suited to?
The CS 618Q suits a listener who wants direct drive speed stability and a pre configured, arm matched cartridge without giving up the option to grow the system. The combination of the tuned tonearm, the pre mounted 2M Blue with its nude elliptical stylus, and the defeatable moving magnet phono stage means the deck works as a complete solution out of the box while still accommodating an external phono preamp later. Semi-automatic operation protects your records and stylus at the end of each side without removing the manual cueing that enthusiasts value, and the aluminum die-cast platter and servo controlled direct drive motor deliver the low wow and flutter figure that underpins stable, confident playback across both supported speeds.
