
Nu-Vista PRE Stereo Preamplifier
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The Nu-Vista PRE is a fully balanced, discrete Class A Preamplifier with separate power supply unit. Based on our excellent Nu-Vista 800 circuit we decided to go all out “fully balanced” on the Nu-Vista range. The Nu-Vista PRE features the tried and tested Nu-Vista stage featuring 6S51N nuvistors in a discrete class A amplifier buffer.
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.
Specifications
Pre Amplifier
- Output Voltage: 28 Vrms
- Output Current: 1 Amp 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 100 kHz
In & Output
- 12 independent inputs: 6x RCA & 6x XLR
- Variable Pre output: 1x RCA & 1x XLR
- Fixed output: 1x RCA & 1x XLR
- Trigger input and output: 3.5mm mono jack socket
- Trigger level ±5V to ±12V
General Information
- Remote Control included
- Weight PRE: 22kg net (30kg)
- Weight PRE PSU: 25kg net (34kg)
- Dimensions PRE (WxHxD): 483 x 187,5 x 491 (506 with connectors)
- Dimensions PRE PSU (WxHxD): 483 x 187,5 x 475 (478 with connectors)
- Mains voltages: 115/230VAC 50/60Hz (factory pre-set); 100VAC 50/60Hz (alternative)
- Consumption <0.5W in standby mode; 65W maximum