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Product Description

Musical Fidelity Nu-Vista PAS

Based on our excellent Nu-Vista 800 circuit we decided to go all out “fully balanced” on the Nu-Vista range.

The Nu-Vista PAS features the tried and tested Nu-Vista stage featuring 6S51N nuvistors in a discrete class A amplifier buffer.

Technical Talk
This is followed by a balanced configuration circuit and balanced input high power, low distortion output amplifier stage. The power stage has 5 pairs of high power thermally compensated output devices for reliable and stable operation.

Based on Titan 1000W stage, it has separate capacitors for bulk supply, and one each for output devices con siderably reducing output impedance and improving dynamics. Chokes are added for further improved supply ripple and pulse current spike reduction Bias is set for over 5W of initial class A operation thereafter the stage slides into class B operation at a point where the now much lower discontinuity is easier dealt with than “standard” crossover distortion.

Heroic Build Quality
The Nu-Vista PAS‘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 PAS 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. We basically get immunity 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 PAS.

The Legendary 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 PAS & Nu-Vista PAS 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 PAS 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 PAS as we had creating it.

Nuvistor Tubes
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.

Technical Specifications

AMPLIFIER TYPE Stereo Power Amplifier
AMPLIFIER CLASS A-B
POWER OUTPUT (8Ω) > 300 W
AMPLIFIER VOLTAGE OUTPUT 49V RMS
AMPLIFIER CURRENT OUTPUT 130A Peak to Peak
OUTPUT DEVICES 5 Pairs per-channel
CHANNEL SEPARATION > 96
DAMPING FACTOR 200
VALVES 8 x 6S51N Nuvistors
SIGNAL TO NOISE RATIO (A-Weighted) > 108 dB
THD +N Typical < 0.003 %
RCA LINE INPUT(S) 2 Stereo Pair
INPUT IMPEDANCE
(UNBALANCED INPUT)
100000 Ω
BALANCED XLR INPUT(S) 2 Stereo Pair
FIXED ANALOGUE OUTPUT(S) 1 x RCA Pair, 1 x XLR Pair
TRIGGER CONNECTION Y
POWER SUPPLY WEIGHT 40 kg
MAXIMUM POWER CONSUMPTION 1060 W
DIMENSIONS
(W X H X D)
483 x 187.5 x 494 mm
ADDITIONAL DIMENSIONS
(W X H X D)
(PSU) 483 x 187.5 x 478 mm
WEIGHT 27 kg

Specifications

MPN
MUFI-NIVUSTAPAS
Brand
Musical Fidelity
Product Code
MUFI-NIVUSTAPAS

Delivery Information

Delivery is free for all orders over £250.

'In Stock' items ordered before 1pm will be dispatched the same day.

We use DPD Local 'Next Day Service' for most UK deliveries. Orders sent via 'DPD Local - Next Day Service' will be fully tracked with a 1-hour delivery timeslot on the day of delivery. Standard delivery is Monday to Friday.

Saturday delivery can be selected at checkout for £19.95.

Small items and LP's may be sent using Royal Mail.

Large/heavy items may be sent using TNT Express.

For all other countries please visit the 'Delivery Information' link in the footer.

Occasionally, due to stock demand, we can sell out. If this occurs when you make a purchase, we will inform you quickly. Most out of stock items are available for dispatch within 3 working days. If your purchase is urgent, please contact us to check availability.

Customer Reviews

Musical Fidelity Nu-Vista PAS Power Amplifier

Available

Product Code MUFI-NIVUSTAPAS

Customer Reviews