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Musical Fidelity - Nu-Vista - Pre-Amplifier
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The Nu-Vista PRE uses a balanced configuration circuit and balanced precision matched stepped attenuator for volume control. This means even at low volume levels, as well as higher, stereo imaging will be precise and accurate. For driving strength, a pair of mini power amplifiers (equivalent to 50W) are used for the output stages. They run in Class A for preamp purposes, giving the best in line driving capability, dynamic range, as well as reduced noise and distortion inherently. Supply capacitance is generous, and chokes are added for further improved supply ripple and pulse current spike reduction.
Quality The Nu-Vista PRE‘s mechanical construction is uncompromisingly rigid and solid in typical Musical Fidelity tradition. Front panel and side panels are milled from extruded aluminium profiles and are extremely massive. The separate Nu-Vista PRE PSU houses all the transformers, which by nature generate mechanical vibrations and radiate harmful electromagnetic fields. Here they are as far away as possible from the critical amplifier circuits. This significantly contributes to great signal to noise ratio. The Nu-Vista PRE is basically immune against the effects of vibration from the environment. The same can be said about electro magnetic immunity. The massive aluminium case acts as a Faraday cage. It protects the internals against outer electromagnetic fields, and in the same way, the rest of your hi-fi gear against electromagnetic fields generated by the Nu-Vista PRE & PRE PSU.
Nu-Vista Stage Never before in the history of hi-fi have Nuvistor tubes been coupled with state-of-the-art fully balanced and discrete technology and sophisticated modern design techniques. The Nu-Vista PRE & Nu-Vista PRE PSU‘s technical performances are astonishing. They measure like a dream but, more importantly, sound incredible. Silky smooth with enormous transients and an effortless feel that is at once relaxing and involving. Of special note how they project images between the loudspeakers so that you can almost touch them. The new Nu-Vista PRE and its PSU were a continued labour of love for Musical Fidelity. We are passionate about what we do and passionate about Nuvistor tubes as we have always been. We hope that you derive as much pleasure listening to the Nu-Vista PRE as we had creating it.
Nuvistor tubes were invented in the 1950s to solve the many shortcomings of conventional tubes. Unlike them, Nuvistor tubes offer very high reliability, low microphony, low noise, consistency from batch to batch, small size, relatively low power consumption and great technical performance. One famous application was in the Ampex MR-70, a costly studio tape recorder whose entire electronics section was based on nuvistors. Another limited application of this very small tube was in studio-grade microphones from that era, the AKG/Norelco C12a, which employed the 7586, being a good example. It was also later found in the famed Neumann U 47 studio microphone. This microphone was highly regarded by artists all over the world, and was used by many top recording artists such as Frank Sinatra, The Beatles, and so on. Remarkably, you can currently see a U47 microphone, with its stand, cables and power supply on eBay for $10.999 „Buy-it-now“. Unfortunately just as uses for Nuvistor tubes were being explored, the transistor was invented and it was ‘game over’ for Nuvistors. There the matter rested until about fifteen years ago, when Musical Fidelity created the first of its ground-breaking Nu-Vista series. These legendary, limited-edition products sold out in a matter of months. Today, fifteen years later, they command very high secondhand prices because of their beautiful sound, build quality, and longevity.
• Output voltage: 28Vrms
• Output current: 1A peak to peak
• Output impedance: <47Ω
• THD+N: < 0.002 % typical, 20Hz to 20 kHz
• Signal / noise ratio: >120dB, 20Hz - 20kHz
• Gain: 2.15x (normal); 4.3x (+6dB enabled); volume maximum
• Input impedance: 100 K Ohms • Overload margin: 24dB
• Channel separation: >100dB, 20Hz - 20kHz
• Frequency response: +0, -1dB, 5Hz to 100kHz