Knif Audio Aski

Knif Audio Aski is a high-precision standalone phono preamplifier designed for both moving magnet and moving coil cartridges, combining a hybrid discrete and IC front end with exceptionally wide gain range, exacting RIAA accuracy and extremely low noise.

Hybrid Front End Architecture

Knif Aski uses a cascode discrete JFET stage that feeds a modern OPA828 op amp so the input remains exceptionally linear, fast and quiet. The MC input benefits from four parallel LSK389 JFETs, which reduce noise density and give cartridges with extremely low output levels a clean, stable interface. The discrete JFET architecture also limits non-linearity in the input capacitance, which ensures accurate moving-magnet performance and consistent frequency response. Engineers who require transparency at high headroom levels gain a front end that maintains bandwidth and linearity even under challenging signal conditions.

RIAA Equalisation and Load Configuration

The RIAA network operates with very high accuracy so the system retrieves programme material with precise tonal balance. The user selects from multiple input load conditions on both MM and MC stages, which allows exact matching to cartridge impedance and sonic character. This adjustability gives a controlled interface for demanding cartridges and keeps noise and frequency shaping firmly predictable.

Gain Structure and Filtering

The unit offers a wide range of gain settings so low-output MC cartridges or high-output MM designs both achieve ideal operating level. The operator activates a 20 Hz high-pass filter when required to control infrasonic energy, protect downstream monitors and preserve headroom for musical content. This filtering operates cleanly and does not disturb the audible spectrum.

Powering and System Integration

Knif Aski accepts power either from an external supply or directly from the auxiliary output on the Knif Mastering Controller power supply, which provides flexible studio configuration. The power architecture ensures the discrete front end, op amp stage and equalisation network receive stable rails so the unit maintains its near-immeasurable distortion and very low self-noise.

Performance Characteristics

Knif Aski delivers extremely high accuracy, exceptional headroom and noise levels approaching the limits of measurement. The overall design draws on classic analogue JFET input philosophies while adopting contemporary ultra-low-noise components, resulting in a modern phono stage with reference-grade transparency.

Why Choose Knif Aski

• It delivers a reference-grade listening chain that reveals the true capability of high-end cartridges.

• It gives engineers flexible control over loading, gain and filtering so they can fine-tune any turntable system.

• It enhances archival, mastering and audiophile playback by preserving signal integrity at extremely low noise.

• It integrates easily into professional rigs thanks to adaptable power options and rigorous RIAA accuracy.

• It supports long-term, reliable operation through meticulous analogue design and premium component choice.

• Hybrid discrete JFET and OPA828 op amp front end
• Four parallel LSK389 JFETs on MC input for ultra-low noise
• Very low input capacitance non-linearity for accurate MM performance
• High-accuracy RIAA equalisation
• Multiple cartridge load choices for both MM and MC
• Switchable 20 Hz high-pass filter
• Wide adjustable gain range
• External or Knif Mastering Controller power compatibility
• Extremely high headroom, negligible distortion and very low self-noise

This item, like everything we supply, comes with the complete support of our expert team. Our excellent technicians have been specifying, building and supporting studios for over twenty years. If you have any problems with installation, setup or everyday use, they’re never more than a click away, and always happy to help.

You can contact them here.