The TD 403 DD marks a turning point in the Thorens range by combining the reliability of direct drive with the renowned expertise of the Swiss brand. This manual turntable represents the culmination of the 400 series, offering substantial improvements over its predecessor, the TD 402 DD, thanks in particular to its new TP 150 tonearm, its solid aluminum platter, and its pre-installed Ortofon2M Blue cartridge.
A design true to Thorens codes with optimized construction
The TD 403 DD proudly asserts its place in the Thorens lineage with an aesthetic that recalls the iconic TD 160 and TD 166 models. The lacquered MDF plinth, available in high-gloss black or walnut, is topped with a brushed aluminum plate that gives the whole a look that is both vintage and contemporary. This construction is not merely aesthetic: it ensures exemplary rigidity and remarkable stability for sound reproduction.
The dimensions of 420 × 355 × 139 mm and the substantial weight of 9.7 kg testify to a robust build. The four damped feet, although not height-adjustable, use a specially designed compliant material to limit the transmission of resonances from the support surface. This attention to mechanical isolation directly contributes to sound quality by minimizing external disturbances that could affect playback.
The 1.4 kg, 22 mm-thick die-cast aluminum platter is one of the major improvements over the TD 402 DD. This greater rotational mass provides beneficial inertia that stabilizes speed and reduces wow and flutter. The supplied rubber mat effectively complements this setup by absorbing residual micro-vibrations.
Direct drive: precision and ease of use
Unlike traditional belt-driven Thorens turntables, the TD 403 DD adopts a direct-drive system in which the DC motor is positioned directly under the platter. This configuration presents undeniable practical advantages: near-instant start-up, remarkable speed stability with a variation of only ± 0.33%, and no belt to replace.
The TD 403 DD’s DC motor has been specifically optimized to provide sufficient torque while maintaining quiet operation. Thorens engineers favored a progressive rather than abrupt start, resulting in particularly low rumble values: 67 dB A-weighted and 60 dB unweighted. This technical approach translates into minimal background noise that preserves the purity of the musical signal.
Speed selection between 33 1/3 and 45 rpm is handled via an electronic switch located on the left side of the turntable. This manual switching remains true to the tradition of high-end manual decks, prioritizing simplicity and reliability over automation. The absence of an integrated phono preamp and an auto-stop function confirms this purist philosophy, leaving the user in full control of their system.
The TP 150 tonearm: technical precision and flexibility
The new Thorens TP 150 tonearm represents a significant evolution in the lineup. Developed by German designer Helmut Thiele, this J-shaped aluminum arm builds on the proven principles of the TP 124 used on the TD 124 DD while adapting them to this price category. With an effective length of 232.8 mm and an effective mass of 15 g (14 g according to some sources), it offers broad compatibility with a wide range of cartridges, whether moving magnet (MM) or moving coil (MC).
The arm’s adjustment system reflects careful design. Height (VTA) and azimuth are adjustable, allowing optimal alignment with different cartridges and record thicknesses. The two-part counterweight accommodates cartridges weighing from 5 to 30 grams, offering remarkable versatility for this price range.
Anti-skating deserves special mention: rather than a magnetic or spring system, Thorens opted for a sliding weight connected by a nylon thread guided over a ruby bearing. This traditional yet refined mechanical solution ensures consistent, predictable operation over time, without the variations that magnetic systems can develop with age.
The standard SME connector on the headshell is a major asset for enthusiasts who want to experiment with different cartridges. This standardization greatly facilitates cartridge changes and allows the turntable to be tailored to different musical styles or sonic preferences.
The Ortofon 2M Blue cartridge: a judicious choice
The TD 403 DD comes with a pre-set Ortofon 2M Blue cartridge, a moving magnet model renowned for its musical qualities. The nude elliptical diamond ensures precise groove tracking and optimal retrieval of engraved information, particularly in the high frequencies. With a frequency response extending from 20 Hz to 25 kHz and a comfortable output voltage of 5.5 mV, it suits any standard phono preamplifier.
The recommended tracking force of 1.8 g ± 0.2 g represents an ideal balance between tracking quality and record preservation. Channel separation greater than 25 dB at 1 kHz provides a well-defined stereo image, while the 1.5 dB channel balance maintains remarkable spatial coherence.
This cartridge is an excellent starting point to fully enjoy the turntable’s capabilities, while leaving the door open for future upgrades. Its compatibility with the standard 47 kΩ load impedance simplifies integration into any hi-fi system.
Use and setup: simplicity and efficiency
Setting up the TD 403 DD remains faithful to Thorens’ philosophy: simplicity and efficiency. The absence of a floating suspension simplifies initial installation, while the TP 150 arm pre-fitted with the Ortofon 2M Blue allows immediate use after a simple arm balancing and tracking force adjustment.
Adjusting the anti-skating, although requiring a fine pencil or similar tool to move the sliding weight, remains a one-time operation that will only be performed when changing cartridges. The system’s stability ensures that once set, it maintains its parameters over time.
The external 24V DC power supply helps electrically isolate the turntable from mains interference. The supplied RCA cable, equipped with gold-plated connectors, ensures a high-quality connection to the phono preamp. The acrylic dust cover effectively protects the turntable from dust while allowing the mechanism to be admired in operation.
Weight: 7.2 g (cartridge only), 13.5 g (total with accessories)
Connectivity
Analog output: Gold-plated RCA connectors
Physical Characteristics
Power supply: 100 - 240 V AC, 50/60 Hz
Maximum power consumption: 36 W
Dimensions (W × D × H): 420 × 355 × 139 mm
Weight: 9.7 kg
Frequently Asked Questions
What is the main difference between the TD 403 DD and the TD 402 DD?
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The TD 403 DD stands out with three major improvements: a heavier 1.4 kg platter with a thickness of 22 mm versus a lighter platter on the TD 402 DD, the new TP 150 arm identical to that of the TD 1500 instead of a more basic arm, and an Ortofon 2M Blue cartridge superior to the TD 402 DD’s Audio-Technica AT-VM95. These upgrades result in improved playback stability and enhanced sound quality.
Does direct drive generate more noise than belt drive?
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Contrary to popular belief, the TD 403 DD shows excellent noise measurements with a 67 dB signal-to-noise ratio A-weighted. Thorens optimized the motor for a progressive rather than abrupt start, which significantly reduces rumble. Modern technologies now allow well-designed direct-drive systems to match, or even surpass, the performance of belt-drive systems in terms of quiet operation.
Can I install a moving coil (MC) cartridge on this turntable?
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Absolutely. The TP 150 arm with its 15 g effective mass and adjustable counterweight accepts low-output MC cartridges. The standard SME connector makes headshell swaps easy, and the absence of an integrated preamp allows the use of an external phono preamp suitable for MC cartridges. The arm’s height and azimuth adjustments allow optimization for any cartridge type.
Which phono preamplifier do you recommend with this turntable?
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The supplied Ortofon 2M Blue works with any standard RIAA phono preamp for MM cartridges. Its high 5.5 mV output allows the use of entry-level models as well as more sophisticated preamps. For an upgrade to an MC cartridge, you’ll need a preamp with a dedicated MC input or a variable-gain phono stage.
Is the TP 150 arm available separately?
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Currently, Thorens does not sell the TP 150 separately. However, the brand is developing the TP 160, a similar arm with knife-edge bearings that will be available individually. This strategy lets Thorens offer the TP 150 exclusively on its complete turntables while providing an upgrade option for other decks.
Is the turntable suitable for all music genres?
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The TD 403 DD offers a balanced presentation suitable for all styles. Direct drive brings dynamics and rhythmic stability appreciated for rock, jazz, and electronic music, while the Ortofon 2M Blue excels at reproducing the detail and nuance needed for classical and acoustic music. The ability to easily change cartridges allows the turntable to be tailored to specific preferences.
User reviews
Christian
Purchased to replace my venerable TD160 mk2 (1978), I am more than satisfied with this acquisition. The build is superb, as is the perceived quality. Assembly is quite straightforward, as is often the case with Thorens. However:
1/ A small disappointment regarding the user manual, which is sometimes randomly translated and generally lacking in detail; special mention for the explanation of the antiskating adjustment, which is rather cryptic and insufficient. It’s commendable that Thorens has devised a particularly sophisticated antiskating system, but it would have been better if it were easier to implement. After watching numerous videos and consulting a few reviews, I finally understood: The first graduation value is 0.5 g and not zero, so for a tracking force of 2g, the weight should be positioned exactly in the center—problem solved!
2/ I had to correct the azimuth of the headshell, which was not perfectly horizontal—quite surprising for a turntable in this range. The operation is fairly simple but really delicate to perform, and it requires very fine tools to avoid any damage.
I’ve saved the best for last, regarding the audible differences I noticed compared to my old turntable:
- A very clear reduction in background and surface noise. - Noticeable improvement in definition and dynamics. - Wider and more detailed stereo imaging. - Greater clarity and firmness in the bass.
In short, many hours ahead to rediscover all your vinyl records!
Of course, the Ortofon 2M Blue cartridge contributes to this significant sonic improvement, but the quiet operation, direct drive, and build quality of the turntable do the rest.
Although the price is high, it remains reasonable compared to the TD 403’s competitors, so for me, it’s a recommended purchase.
Comment from May 07, 2025 — Experience from April 26, 2025
Automatically translated — Show original (French)
Achetée pour remplacer ma vénérable TD160 mk2 (1978), je suis plus que satisfait de cette acquisition. La construction est superbe tout comme la qualité perçue. Le montage en est assez simple, comme souvent chez Thorens. Par contre:
1/ Petite déception concernant le mode d’emploi à la traduction parfois aléatoire et globalement peu détaillé ; mention spéciale pour l’explication du réglage de l’antiskating assez cryptique et insuffisante. Il est louable de la part de Thorens d’avoir concocté un système d’antiskating particulièrement élaboré, encore eut il fallu qu’il soit plus facile à mettre en œuvre. Après avoir visionné moult vidéo et consulté quelques bancs d’essai j’ai fini par comprendre : La première valeur de graduation étant 0,5 g et non zéro, le réglage pour une force d’appui de 2g implique la position du poids pile-poil au centre, donc problème réglé !
2/ J’ai du corriger l’azimut du porte cellule qui n’était pas parfaitement horizontal, assez étonnant pour une platine de cette gamme. L’opération en est assez simple mais vraiment délicate à réaliser et elle nécessite des outils très fins pour ne rien abimer.
Je garde le meilleur pour la fin, concernant les différences audibles constatées avec mon ancienne platine:
- Recul très net du bruit de fond et du bruit de surface. - Gain très sensible en terme de définition et de dynamique. - Image stéréo plus large et plus détaillée. - Plus de clarté et de fermeté dans le grave.
Bref, de longues heures à prévoir pour redécouvrir tous ses vinyles !
Bien sûr la cellule Ortofon 2M Blue contribue à cette nette amélioration sonore mais le silence de fonctionnement, l’entraînement directe et la qualité de construction de la platine font largement le reste.
Le prix bien qu’élevé reste correct si l’on compare la TD 403 à ses concurrentes, donc pour moi c’est un achat recommandé.
Georges
This turntable is the continuation of a long list since the 70s, from all brands, and probably the last one. I was hesitating between Thorens and Technics, but the look of Thorens won me over, especially in the walnut finish, and the vintage aspect. Additionally, equipped with an Ortofon Blue cartridge, it's pure joy.
Comment from March 06, 2025 — Experience from February 22, 2025
Automatically translated — Show original (French)
Cette platine, est la suite d'une longue liste depuis les années 70, de toutes marques, et probablement la dernière, j.étais hésitant entre Thorens et Technics, mais le look de Thorens l'a emporté surtout en finition noyer, et le coté vintage, de plus équipée d'une cellule Ortofon blue, que du bonheur.
Dominique
Good mid-range turntable with a "vintage" vibe reminiscent of Thorens turntables from the '70s/'80s, though only in terms of aesthetics, as the technical aspects are firmly rooted in the modern era. Very easy to set up (it’s not suspended), with direct drive. The tonearm is of high quality and provides all the necessary adjustments to allow for cartridge or platter mat changes. In the black lacquered version, it looks stunning. I had some trouble interpreting the manual regarding the anti-skating adjustment, but it was quickly resolved. If you're looking for a solid, no-frills turntable that gets the job done and offers upgrade potential, this is an excellent choice.
Comment from January 10, 2025 — Experience from December 12, 2024
Automatically translated — Show original (French)
Bonne platine de milieu de gamme dans l’esprit "vintage " rappelant les platines Thorens des années 70/80, sur le côté esthétique seulement car en ce qui concerne l’aspect technique, on est bien dans le monde actuel. Très facile à mettre en œuvre, (elle n'est pas suspendue), entraînement direct. Le bras est très qualitatif et offre tous les réglages nécessaires pour pouvoir changer de cellule ou de couvre plateau. En version laquée noir, ça claque. J’ai eu quelques difficultés à interpréter la notice concernant le réglage de l’anti skating mais résolu très vite. Si vous cherchez une bonne platine sans chichi, qui fait le job et offre des possibilités d’upgrade, c'est un excellent choix.
Eco-contribution of €0.42 included in the sale price.
GTIN / EAN: 4260623590784
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