The NP1 Power Amplifier is the first stereo power amplifier to use Audio by Van Alstine's class-defining Advanced Nested Architecture (ANA).
The NP1 Power Amplifier oozes with the transparency, dynamic range, linearity, and pure music for which Audio by Van Alstine is known. Listen to all of your recordings again and you will hear acoustic space and musical nuance in a much more real and involving way. The cost is lower and the performance much higher than you have any right to expect.
Amplifier Circuits
The NP1 Power Amplifier uses our Advanced Nested Architecture (ANA) technology to deliver stunning linearity and sound quality previously unimaginable at its price. It generates up to 55 watts per channel into 8Ω and is suitable for nominal 4Ω loads and up.
ANA is a major advancement in audio power amplifiers that brings you ever closer to the original source. Unlike more conventional class AB amplifiers, ANA employs two independent control mechanisms to manage circuit nonlinearities. The first mechanism provides the kind of correction found in typical class AB audio amplifiers. To this, ANA adds a second global correction circuit that reduces nonlinearities to the vanishing point. We are confident that you will find the results exhilarating.
Power Supply Circuits
To fully support the incredible dynamic range, bass extension, and transient detail the NP1 Power Amplifier's audio circuits are capable of, the amplifier uses a linear power supply based around a high-capacity toroidal power transformer. All of the power supply parts are selected for long life and reliability and operate well within their technical specification ratings.
Additional Information
The NP1 Power Amplifier operates with standard 120V AC power. It has an IEC power socket, and we include a 120V IEC power cord. We don't recommend using the NP1 with unbuffered "passive preamplifiers" or other sources with an output impedance greater than 1kΩ.
Specifications
Power output: 55 watts per channel into 8Ω. 85 watts per channel into 4Ω.
Inputs: One line-level stereo input on gold-plated RCA jacks.
Input impedance: 50kΩ
Maximum source impedance: 1kΩ. Not suitable for use with unbuffered "passive preamplifiers."
Amplifier gain: 26.3dB
Dimensions: 17" wide, 12" deep, 3.5" high. Shipping weight is 20 pounds.
Reviews
- Part-Time Audiophile 2025’s Best Power Amplifiers, December 2024.
- Potato Fi Reviews, October 2024.