@kemela

NUPRiME Audio was established in 2014 and is known for its innovative Hybrid Class-D analog modulated type technology offering both high power and the desirable sonic characteristics of a vast soundstage, fast dynamics (from wide bandwidth), texture and nuance (from ultra-low distortion and noise) all at an affordable price.

Traditional approaches to amplifier design are materially expensive, particularly with higher outputs, because of large low frequency transformers and extensive heat sinks.

Where beneficial, and alongside toroidal and C-core transformers, Ultra-Low noise GaN (Gallium Nitride) very high frequency power supplies are just one of many of the advanced technolgies deployed in NuPrime Hi-Fi components. These permit smaller lighter weight components and the advantage of high efficiency and ability to handle line voltage variations.

Why NUPRiME's amplifiers don't sound 'digital'

NUPRiME amplifiers use a naturally occuring analog signal (conventionally a saw-tooth or triangle waveform is used) for the carrrier signal in the comparator that modulates analog input signal into pulses of different widths (Pulse Width Modulation). Other than the intial PWM generation, the process is analog and there is no ADC or DSP conversion into the strictly 1s and 0s fixed width pulses of the 'digital' domain. The degree of carrier wave non-linearity (in the case of saw tooth and trangle waveform is related to the finite number of harmonics in the waveform) is a major influence on the eventual sound of the sound of PWM based approach following a power stage and output demodulation filter.

NUPRiME amplifiers convert the analog input signal into pulses of different widths (Pulse Width Modulation) using a naturally occuring analog signal whereas conventional class-D type amplifiers use a saw-tooth or triangle waveform for the carrrier signal in the comparator. Other than the intial PWM generation, the process is analog and there is no ADC or DSP conversion into the strictly 1s and 0s fixed width pulses of the 'digital' domain. The finite number of harmonics in connventional carrier saw tooth and trangle waveforms introduces non-linearity in the modulation process imparting a major negative influence on the eventual sound following the power stage and output demodulation filter.

Why NUPRiME amplifiers can be more compact

Because NUPRiME uses a very high switching frequency (up to 750KHz in the top products), smaller components can be used reducing the size of the circuit boards and overall size of the product as a whole.
While smaller and more efficient, this more modern sophicated approach does not mean less power or lower quality.

A smaller chassis does mean less room for inputs but how many analog inputs are used in most people's set ups? A full compliment of digital inputs is provided which is more useful.

Other technical benefits

NUPRiME amplifiers maintain low distortion characteristics at every output level and audio frequency and have no phase shifts which means they sound good with many different speakers.

NUPRiME amps are designed not to all sound the same

Using advanced circuit simulation, Nuprime engineers understand how to tailor characteristics in the various architectural blocks of an amplifier to change the presentation to suit the music or taste of the user in much the same way venues impact sound or recording engineers organize a microphone setup. The more expensive models allow for greater refinement across the board than the lower priced models where some trade-offs have to be made. All the amplifiers are powerful however.