Musical Fidelity Nu-Vista PAS Stereo Power Amplifier

Description

Nu-Vista PAS

The Nu-Vista PAS is a premium stereo power amplifier featuring the tried-and-tested Nu-Vista stage, with 6S51N Nuvistors in a discrete class A amplifier buffer.

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 the Titan 1000 W stage, this power stage has separate capacitors for bulk supply, and one each for output devices considerably reducing output impedance and improving dynamics.

Chokes are added for further improved supply ripple and pulse current spike reduction Bias is set for over 5 W of initial Class A operation, thereafter the stage slides into Class B operation at a point where the now-much-lower discontinuity is more easily dealt with than standard crossover distortion.

Dedicated Nu-Vista PAS Power Supply

The Nu-Vista PAS comes with its own dedicated external power supply.

To achieve better noise performance, Musical Fidelity removed the AC mains power supply from the main unit and built it into another matching box. In this they took advantage of the extra space to set up inbuilt mains and output filtering.

This quietens up the supplies and results in almost no mains-borne artefacts getting into the sensitive audio circuitry. The Power supply has On / Standby LEDs and is controlled from the main unit front panel. If total mains isolation is required, the power supply also has rear mounted mechanical rocker switch for full power off.

The 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.

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.

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.

Legendary Nu-Vista Stage

The Nu-Vista PAS + Nu-Vista PAS PSU has astounding technical performances. 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.

Features

• Stereo fully balanced + discrete power amplifier.
• High output power, greater than 300 W into 8 ohms, 500 W into 4 ohms, 1000 W peaks into 2 ohms.
• Low Noise Nu-Vista circuitry.
• Dedicated external Nu-Vista PAS PSU.
• Colour display with optional VU-Meters and clear selected input.
• Dimmable display.

Specifications

• Amplifier
• Output Voltage: 49 Volts RMS
• Output Current: 130 Amps peak to peak
• Damping Factor: 200
• Output Devices: 5 pairs per-channel.
• Gain: 16 x (23.5 dB)
• THD+N: < 0.003 % typical, 20 Hz – 20 kHz
• Signal / Noise Ratio: >108 dB A-weighted
• Channel Separation: >96 dB
• Input Impedance: 100 kOhms.
• Input Sensitivity (for full output): 3 Volts RMS
• Frequency Response: +0, –1 dB, 5 Hz – 50 kHz
• Input / Output
• 4 fully independent inputs: 2 x RCA, 2 x XLR
• 2 loop through outputs: 1 x RCA, 1 x XLR
• Speaker Outputs: 2 pairs 4 mm banana plug / binding posts.
• Trigger Input / Output: 3.5 mm mono jack socket.
• Trigger Level: ±5 V – ±12 V
• General Information
• Weight PAS: 27 kg net (35 kg)
• Weight PAS PSU: 40 kg net (50 kg)
• Dimensions PAS (W x H x D): 483 x 187,5 x 475 mm (494 with connectors).
• Dimensions PAS PSU (W x H x D): 483 x 187,5 x 475 mm (478 with connectors).
• Mains Voltages: 115 / 230 V AC 50/60 Hz (factory preset); 100 V AC 50/60 Hz (alternative).
• Consumption <0.5 W in standby mode; 130 W on and idle; 1060 W maximum.

Included

• 1 x Nu-Vista PAS
• 1 x Nu-Vista PAS PSE Power Supply Unit
• 1 x Mains Power Cable.
• 1 x Documentation.

Full Musical Fidelity Range Available

Unilet Sound & Vision are official retail partners for Musical Fidelity, providing sales, advice and assistance on their entire range of high-quality products. Please do get in touch if you would like a demonstration or wish to purchase.

More Information

• Nu-Vista PAS, by Musical Fidelity

Additional information

Brand

Musical Fidelity

Musical Fidelity have been designing and manufacturing hi-fi electronics for over thirty years, and are proud to have become one of the best-known brands in the audio industry.

The company are driven by a passion for wonderful music and the challenge of world-class engineering. Musical Fidelity approach each new design by looking for the absolute best solution to any given challenge, and embrace new technologies in their designs as well as developing more traditional methods for even greater performance.