The black Naim CD5si continues the tradition of British audiophile excellence. As the successor to the CD5i, this entry-level player incorporates several technical improvements inspired by the brand’s more advanced models. Awarded by What Hi-Fi? in 2013, it focuses on sound quality rather than a multitude of features. It is equipped with a Burr Brown PCM1793 DAC, also used in the network player NDX, as well as a new transport mechanism. This model is aimed at music lovers seeking a device focused on sonic precision and meticulous design.
Technical advancements compared to the CD5i
The CD5si marks a significant technological leap from its predecessor. Naim has replaced the Wolfson WM8706 converter with a Texas Instruments Burr Brown PCM1793 DAC, a component directly taken from the high-end NDX network player. This upgrade is accompanied by a reinforced precision clock that drastically reduces jitter, the main source of digital signal degradation.
The power supply benefits from a higher operating voltage, improving the linearity of the output signal. The analog filter has been completely redesigned, reducing distortion by a factor of ten compared to the previous model. All these changes converge toward a single goal: extracting more musicality from every compact disc.
The transport mechanism is the third major evolution. Naim has developed a new laser system and redesigned optics, mounted on the brand’s traditional suspended platform. This approach ensures more stable playback and increased longevity of the mechanism—critical points for intensive use.
Audiophile construction and design
The CD5si’s chassis showcases Naim’s expertise in vibration control. The rigid extruded aluminum forms a non-magnetic structure that effectively isolates sensitive circuits from external interference. This hefty 8.1 kg construction directly contributes to sound quality by eliminating unwanted resonances.
The matte black finish blends seamlessly into contemporary hi-fi setups. Its compact dimensions allow for easy placement, though Naim recommends a dedicated stand and strongly advises against placing the device directly on top of another Naim component. This precaution prevents harmful vibrational coupling.
The digital and analog power supplies are physically separated, a fundamental principle of Naim engineering. This isolation ensures that the digital processing circuits do not interfere with the critical analog stages responsible for final sound reproduction.
Operation and loading system ergonomics
The CD5si continues Naim’s iconic swing-out drawer system, which can initially puzzle newcomers. This unique mechanism opens by pulling the handle on the left side of the front panel, revealing a magnetic tray on which the disc rests. A magnetic puck, specific to the CD5si, clamps the CD onto the tray, ensuring optimal coupling and eliminating any risk of slippage.
This unconventional approach offers undeniable acoustic advantages. The absence of a motorized mechanism reduces vibrations, while the puck system guarantees perfect centering of the disc. Naim specifies that each model uses a specific, non-interchangeable puck—a technical detail that illustrates the attention paid to every element.
The infrared remote control allows full command of playback functions. The front interface is limited to four essential buttons, reflecting the brand’s minimalist philosophy that prioritizes sound quality over technological gadgets.
Sound performance and musicality
The CD5si delivers a typically Naim sonic signature, characterized by exceptional rhythm and striking dynamic reproduction. The bass is tight and fast rather than deep or thick, favoring precision over impact. This approach is particularly suited to rhythmic music where timing takes precedence over frequency extension.
Detail resolution reaches a remarkable level for this price range. The player reveals the micro-information contained in recordings without veering into cold analysis. This ability to unveil nuances while preserving musical emotion is the very essence of Naim’s approach.
The soundstage is defined by its coherence and stability. Instruments occupy well-defined positions in space, making it easy to follow complex melodic lines. This precise localization, combined with preserved dynamics, creates a natural sense of the musicians’ presence.
Compatibility and system synergy
The CD5si reveals its full potential when paired with the integrated amplifier NAIT 5si, a combination recommended by Naim to maximize synergy. This pairing benefits from shared design philosophies and cross-optimizations between the two devices.
RCA and DIN outputs offer flexible connectivity for various setups. Naim strongly advises against using both outputs simultaneously, as this can degrade performance. The choice between standard RCA connectors and proprietary DIN depends on the chosen amplification ecosystem.
The deliberate absence of digital outputs illustrates Naim’s philosophy: rather than multiplying connection options, the brand focuses its efforts on optimizing the analog path. This purist approach may frustrate users wishing to connect an external DAC, but it ensures optimal performance in the intended configuration.
