Thorens occupies a rare place in the history of the turntable. Founded in Switzerland in the nineteenth century, the company earned its enduring reputation through a lineage of suspended sub-chassis belt drive designs, most famously the TD 150 and the celebrated TD 160 that followed. Those decks established a design philosophy that still governs high performance analog playback today: isolate the platter and tonearm from the outside world, keep the drive gentle and consistent, and let the stylus read the groove without contamination from vibration, motor noise, or acoustic feedback.
The Thorens TD 1601 is a contemporary flagship expression of that philosophy. It updates the classic suspended architecture with modern electronic conveniences, a proper high quality tonearm, and balanced connectivity, while staying faithful to the mechanical principles that made the marque famous. What follows is a thorough breakdown of how it works and why each engineering decision matters to the listener.
Drive System and Speed Control
What kind of drive system does the TD 1601 use?
The TD 1601 uses a sub-chassis (suspended) belt drive. In this arrangement, an elastic belt couples the motor pulley to the platter rather than a direct coupling of motor to spindle. The belt behaves as a mechanical low pass filter, absorbing minute vibrations and cogging artifacts from the motor before they can reach the platter and be transcribed into the groove as noise or speed irregularity. The audible result is a lower noise floor and a smoother, more relaxed presentation, particularly in quiet passages where motor rumble would otherwise intrude.
How does the motor work and why an AC motor?
The TD 1601 is driven by an electronically controlled AC motor. An AC synchronous motor locks its rotational speed to the frequency of the alternating current supplied to it, which makes it inherently well suited to steady platter speed. The critical word here is electronically controlled: rather than relying on the raw wall frequency, the deck generates and regulates the drive signal precisely. This gives consistent speed regardless of local mains variations and allows the motor to be run in an optimal operating regime for low vibration. Electronic control also enables convenient speed switching without moving the belt by hand.
What speeds does it play and how do you change them?
The TD 1601 plays 33 1/3 and 45 RPM, and speed selection is electronic. Because the speeds are chosen electronically rather than by physically shifting the belt to a different pulley diameter, you simply select the speed and the control circuitry adjusts the motor drive accordingly. This is a practical benefit that also reduces wear and the risk of dislodging the belt, and it means switching between a twelve inch album and a 45 single is a quick, repeatable operation with no fuss.
The Suspended Sub-Chassis and Isolation
What is a suspended sub-chassis and why does it matter?
A suspended sub-chassis is a floating internal platform that carries the platter bearing and the tonearm together, decoupled from the outer plinth by a system of springs. This is the defining feature of the classic Thorens design and the heart of the TD 1601. Because the platter and tonearm share the same suspended mass, they move together as a single unit if the deck is disturbed. That coherence is important: the geometric relationship between stylus and record is preserved even when the environment is not perfectly quiet.
The suspension acts as a mechanical filter with a low resonant frequency, meaning it isolates the sensitive parts from footfalls, structural vibration, and airborne acoustic energy from your loudspeakers. Anyone who has watched a non-suspended deck skip when someone walks across a wooden floor understands the value here. The audible payoff is a blacker background, greater dynamic contrast, and freedom from the low frequency feedback that can smear bass and muddy the midrange when a system plays loud.
Why suspend the platter and tonearm together rather than separately?
Suspending the platter and tonearm together keeps them mechanically in the same reference frame so that any residual motion is common to both, which prevents relative displacement between stylus and groove. If the platter were isolated but the arm were rigidly fixed to the outer plinth (or vice versa), external disturbances would create differential movement, and that differential movement is exactly what the cartridge reads as unwanted signal. By floating them as one, the TD 1601 ensures that whatever tiny motion does occur is shared, so the stylus stays properly seated in the groove wall.
The Tonearm and Cartridge Interface
What tonearm is fitted to the TD 1601?
The TD 1601 is fitted with the Thorens TP 92 tonearm. This is a serious, purpose built arm rather than a budget afterthought, and its quality is central to the deck's performance because the tonearm is the mechanical link that lets the cartridge extract detail while controlling resonance. A well engineered arm provides a rigid yet appropriately damped structure, low friction bearings for accurate tracking, and the adjustability an enthusiast needs to dial in a chosen cartridge. Because the TP 92 is integrated into the suspended sub-chassis, it benefits directly from the isolation described above.
Does the TD 1601 come with a cartridge?
No, a cartridge is not included, and the owner selects it. This is deliberate and, for an experienced listener, a feature rather than an omission. Cartridge choice is deeply personal and interacts with the rest of the system, so a flagship suspended deck is designed to let you install the pickup that suits your ears, your phono stage, and your musical priorities. The TP 92 gives you the adjustability to set tracking force, alignment, and other parameters correctly for whatever cartridge you fit, which is essential to realizing the deck's full potential.
How does the cueing system work?
The TD 1601 uses electronic auto lift/lower plus a powered lift, which means the raising and lowering of the tonearm is handled by a controlled mechanism rather than a purely manual damped lever alone. The powered lift lets you set the stylus down and raise it gently at the touch of a control, minimizing the risk of a mishandled drop that could damage stylus or record. The auto lift function is a genuine convenience and a protective measure: at the end of a side, the arm lifts automatically, sparing your stylus from riding the run out groove indefinitely and protecting the record if you step away. This combines the sonic purity of a manual style suspended deck with a layer of modern usability.
Power Supply
Why does the TD 1601 use an external power supply?
The TD 1601 uses an external power supply, which physically removes transformer and mains related electrical and mechanical noise from the immediate vicinity of the platter and tonearm. A transformer generates a small magnetic field and can transmit mechanical hum through its mountings. By locating the power supply outside the main chassis, the design keeps that hum field and any associated vibration away from the sensitive bearing, motor, and low level cartridge signal path. The practical benefit is a cleaner power delivery to the electronically controlled motor and a lower overall noise floor, reinforcing the isolation goals that the suspension already serves.
Connectivity and System Integration
What outputs does the TD 1601 offer?
The TD 1601 offers both balanced XLR and unbalanced RCA outputs. This dual output capability is unusual and valuable in a turntable, and it directly affects how cleanly the cartridge signal reaches your phono stage. The RCA connection is the traditional single ended interface compatible with the vast majority of phono inputs. The XLR connection, by contrast, offers a fully balanced path.
Why does a balanced XLR output matter for a turntable?
A balanced XLR output matters because a moving magnet or moving coil cartridge is inherently a balanced source, generating its signal across a coil with no intrinsic ground reference, so a balanced connection preserves that native topology all the way to a balanced phono input. In a balanced link, the signal travels as two equal and opposite polarities down a twisted pair, and any noise picked up along the cable is induced equally into both conductors. A differential phono input then subtracts the two, canceling that common mode noise while keeping the music. For the very low output voltages produced by phono cartridges, this common mode rejection can meaningfully improve signal to noise, especially over longer runs or in electrically busy environments. If your phono stage has balanced inputs, the TD 1601 lets you take full advantage; if not, the RCA outputs ensure universal compatibility.
Materials, Build, and Interpreting the Design
How do the materials and build support the sonic goals?
The build of the TD 1601 is organized entirely around the twin objectives of mass stability and vibration control, which is why the suspended sub-chassis, the belt drive, and the external power supply all appear together in one design. Each of these choices addresses a different vibration pathway: the belt attenuates motor borne vibration, the suspension attenuates structure borne and airborne vibration, and the external supply removes an electrical and mechanical noise source from the chassis. Read as a whole, the specification list describes a coherent low noise machine in which no single feature works in isolation. They reinforce one another.
What do the specifications tell an experienced listener?
Taken together, the specifications tell an experienced listener that this is a purist suspended deck with modern electronic assistance rather than an all automatic convenience player. The presence of a suspended sub-chassis, an electronically controlled AC motor, and belt drive signals a design that prioritizes a quiet background and stable speed. The TP 92 arm and the owner selected cartridge indicate that fine tuning and system matching are expected and encouraged. The electronic speed selection and electronic cueing with powered lift show that Thorens has layered genuine usability on top of the classic mechanical foundation without compromising it. The dual RCA and XLR outputs reveal an intent to integrate cleanly into high resolution systems, balanced or single ended.
Where the TD 1601 Sits in the Thorens Lineup
How does the TD 1601 fit within the Thorens range?
The TD 1601 sits toward the upper end of the Thorens lineup as a full featured expression of the marque's traditional suspended sub-chassis philosophy. It is the natural descendant of the historic TD 150 and TD 160 suspended decks, carrying their core mechanical concept forward while adding the TP 92 tonearm, electronic speed selection, electronic cueing, an external power supply, and balanced output. Within the family, it represents the version of the classic idea that offers both the sonic virtues of suspension and belt drive and the practical refinements a modern enthusiast expects. It is aimed at the listener who wants the character and isolation of a true floating sub-chassis Thorens together with contemporary connectivity and convenience.
Conclusion
The Thorens TD 1601 is a study in coherent design, where every element serves the same purpose. The suspended sub-chassis isolates the platter and TP 92 tonearm as a single reference frame, the belt drive and electronically controlled AC motor deliver quiet and stable rotation across 33 1/3 and 45 RPM, the external power supply banishes noise from the chassis, and the balanced XLR alongside unbalanced RCA outputs lets the cartridge signal reach your system as cleanly as possible. Leaving cartridge choice to the owner keeps the door open to genuine system matching. For the experienced enthusiast, the TD 1601 offers a modern, thoughtfully assisted take on the suspended belt drive tradition that made Thorens a name worth knowing in the first place.