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What are the special features of the NADAC L’s mode selection ?
NADAC L offers five different modes specifically designed for advanced systems supporting bi-amp and tri-amp configurations with ease. This makes it ideally suited for multi-driver loudspeaker setups and complex high-end systems. In practice, this means that NADAC L can integrate seamlessly into demanding installations while preserving the integrity of its 100% analog architecture
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Why doesn’t the NADAC L include amplification ?
NADAC L is designed as a pure attenuation preamplifier. Modern DACs and phono stages already deliver sufficient voltage output; the primary role of a preamplifier is to attenuate the signal to match amplifier sensitivity, not to amplify it further. By remaining 100% analog and focused solely on precise attenuation, the NADAC L avoids unnecessary amplification…
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Why is there a relay sound at the –8 dB volume position ?
At –8 dB, a rarely used setting, the NADAC L engages a hardware relay using a “gear-shift” concept borrowed from precision measurement instruments. This ensures that even under conditions of high attenuation, the signal path maintains ultra-low noise performance. It is one more safeguard ensuring that the full analog path remains uncompromised at every level…
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What is Precision AC-Coupling in the NADAC L ?
NADAC L uses AC input coupling with ultra-low dissipation factor film capacitors, carefully matched for precision. Each capacitor pair is measured using a Keysight E4990A impedance analyzer across the 20 Hz – 1 MHz range to ensure channel consistency. This meticulous process guarantees perfect left–right channel matching and absolute transparency, preserving the integrity of its…
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Does NADAC L use a switching power supply or a linear power supply ?
The analog stage of the NADAC L is powered by a high-performance linear transformer power supply. In practice, less than 10% of its rated capacity is used, guaranteeing ample headroom for stable dynamics and ultra-low noise. For the control stage, a high efficiency switching power supply is employed. Digital circuits demand higher current, and transformer…
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What is the background and heritage of the NADAC L ?
NADAC L is not a product created in isolation. Its two lead designers previously developed audio analyzers and studio-grade monitor controllers. This deep background means that NADAC L is both a technical and artistic achievement, excelling in objective measurements and in subjective listening. As a result, it stands as a fully analog preamplifier that balances…
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What volume control scheme does the NADAC L use, and what are its technical advantages ?
NADAC L uses a custom-designed electronic switching chip developed by the MF engineering team and fabricated at a leading European IC foundry using a special low-noise process. Functionally, it is a click-noise-free alternative to mechanical relays, combined with ultra-low TCR precision resistors for pure, transparent performance. With thermal drift reduced to virtually zero, the volume…
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Why doesn’t the NADAC L adopt traditional digitally controlled volume solutions ?
Conventional digitally controlled volume schemes usually fall into three categories: Potentiometer + Stepper Motor – Simple and easy to control, but prone to left–right channel imbalance and limited separation. Relay Array – Preserves signal integrity, but frequent relay switching produces audible clicks and high-frequency noise. Electronic Volume Chips – Inexpensive and simple, but their integrated…
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NADAC L features a Peak Level Meter. Does that mean it uses digital volume control ?
Not at all. NADAC L is a digitally controlled analog preamplifier. Its audio signal path for volume adjustment is 100% analog, while digital circuitry is used only for precision control and monitoring. This unique design ensures that the sound remains absolutely authentic and pure. The Peak Level Meter employs an ADC to sample the incoming…
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Where can I find detailed NADAC L specifications ?
Please refer to https://www.master-fidelity.com/nadac-l/#specifications
