- Custom Solutions
- Aspire Audio
- Audio Engine
- Ben Burton Pty Ltd
- Bang & Olufsen
- Bowers & Wilkins
- Chord Electronics
- cocktail Audio
- C SEED
- Garrott Brothers
- Hana Cartridges
- JBL Synthesis
- JL Audio
- MadVR Labs
- Magnum Dynalab
- Meze Audio
- Mobile Fidelity Sound Lab
- Musical Fidelity
- Pantheone Audio
- PS Audio
- Revival Audio
- Roon Labs
- Row One
- Ruark Audio
- Serhan Swift
- Sonus faber
- Tivoli Audio
- View all
- Latest News
- Contact us
Out of stock
Based on Musical Fidelity excellent Nu-Vista 800 circuit Musical Fidelity 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.
Local pickup or $11 flat rate shipping within Australia
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.
Nu-Vista PAS Power Supply
The Nu-Vista PAS comes with its own dedicated external power supply.
To achieve better noise performance, we removed the AC mains power supply from the main unit and built it into another matching box. In this box we took advantage 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.
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 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.
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.
- High output power, greater than 300W into 8 ohms, 500W into 4 ohms, 1000W peaks into 2 ohms
- Output Voltage: 49 Volts RMS
- Output Current: 130 Amps peak to peak
- Damping factor: 200
- Output devices: 5 pairs per channel
- Gain: 16x (23.5 dB)
- THD+N: < 0.003 % typical, 20Hz to 20 kHz
- Signal / noise ratio: >108dB ‘A’-weighted
- Channel separation: >96dB
- Input impedance: 100 k Ohms
- Input sensitivity for full output: 3 Volts RMS
- Frequency response: + 0, –1dB, 5Hz to 50 kHz
Input & Output
- 4 fully independent inputs: 2x RCA & 2x XLR
- 2 loop through outputs: 1x RCA & 1x XLR
- Speaker outputs: 2 pairs 4mm banana plug/binding posts
- Trigger input and output: 3.5mm mono jack socket
- Trigger level ±5V to ±12V
- Weight PAS: 27kg net (35kg)
- Weight PAS PSU: 40kg net (50kg)
- Dimensions PAS (WxHxD): 483 x 187,5 x 475 (494 with connectors)
- Dimensions PAS 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; 130W on and idle; 1060W maximum
Only logged in customers who have purchased this product may leave a review.
At Len Wallis Audio, whether you’re purchasing in store, over the phone or online through our ecommerce store, we want you to be completely satisfied with your purchase.
Our Refund, Return and Repairs Policy is here to clarify any concerns or questions you might have prior to you making a purchase from us. This way you can be sure of our policy on refunds, returns and repairs and your rights under the Australian Consumer Law.
We also recommend you immediately inspect any goods that you receive from us to ensure you are completely satisfied with the goods, including that the goods are of acceptable quality, and match the description we have provided to you.
If you have any questions about this policy, please contact us at firstname.lastname@example.org or 02 9427 6755
We require a receipt or proof of purchase.
- Please do not send your purchase back to the original manufacturer.
- There are certain situations where only partial refunds are granted (if applicable). For example:
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned for reason of change of mind more than 14 days after delivery or purchase from the store.
Consumer Guarantees and Your Rights under the Australian Consumer Law
Refer to our page for more information.
Goods Damaged in Transit.
If any goods arrive damaged, please contact us as soon as possible. Len Wallis Audio will arrange to have the damaged goods returned and either arrange for a replacement of the goods or refund the price to you. Damaged goods must be returned in the condition received by you with all original packaging, accessories and/or manuals.
Refunds will be normally be processed within five (5) days.
Where Len Wallis Audio considers the goods to have breached a consumer guarantee, any shipping costs to return the goods to Len Wallis Audio will be at our cost.
Returns and Repairs.
You may visit Len Wallis Audio and a staff member will assist you with any return or repair. This may include inspecting the goods, arranging for the goods to be repaired, or providing you with a replacement.
Goods must be returned within a reasonable time.
If any goods cannot be easily returned to us due to their size, the fault or because they have been affixed or installed in your premises, please contact us and we will arrange an inspection to assess the goods.
Goods returned for repair will be assessed and/or repaired within a reasonable time. You may be provided with an indicative repair time, which time may vary due to reasons beyond ours or the repairer’s reasonable control, such as part availability and incorrect fault description.
You may be required to pay labour, assessment and/or freight fees, such as where goods are assessed to have been damaged by misuse or accident, or where your rights under the Australian Consumer Law or any manufacturer’s warranty do not apply. We may provide you with an indicative fee, which may vary due to reasons beyond our control.
If any goods that you return are capable of retaining user generated data such as files stored on a hard drive, and songs stored on a portable media player, the replacement or repair of the goods may result in loss of the data. In these circumstances, we recommend you back up data to prevent data loss, and remove sensitive or confidential data, as a party assessing and/or repairing your goods may be required to view data in the course of carrying out the assessment. We will not be responsible for any data loss.
In some circumstances, goods presented for repair may be replaced by refurbished goods of the same type rather than being repaired. Refurbished parts may be used to repair the goods.
Where you have any questions or concerns relating to your Order, please immediately contact us
We understand that sometimes you may simply change your mind about a purchase or have made a wrong selection. In these situations, you have 14 days in which to return your item for a refund, exchange or store credit. If more than 14 days has passed since your purchase we can’t offer you a refund, exchange or store credit.
To be eligible for a return, refund or store credit your item must be in the same condition that you received it. Which is to say, it must be in the original unopened packaging, and in ‘brand new’ saleable condition.
Please note that current Australian Consumer Law does not require us to offer a ‘Change of Mind’ refund. Rather Len Wallis Audio offers 14 day ‘Change of Mind Policy’ in good faith. For more information on consumer rights and guarantees, please visit the Australian Competition and Consumer Commission web site.