Quad PA-One Valve Headphone Amplifier

Quad PA-One Valve Headphone Amplifier

Free UK Delivery



The PA-One headphone amp from Quad is a point of pride for the company. It's a highly versatile unit that follows the same exemplary level of build quality and sonic warmth that one would expect from any product designed and engineered by the traditional hifi manufacturer. The PA-One is ideal for any Hi-Fi enthusiast who wishes to bring the full potential of Quad-sound to their private listening experience. Quad believe that some people using high-end headphones never fully realise exactly what they're capable of, as they are often connected to poorly matched amplification. Quad have built the PA-One to combat this. 

The adept unit features a wide range of digital and analogue connections, including Balanced, RCA, Coaxial, Optical and USB, all the while retaining a relatively compact profile. This high level of flexibility makes listening to music a simple process, without having to think about the decoding of different formats. Quad describe it as 'simple - and effective'. 

Computers/laptops have become an exceptionally popular music source, thanks to their ability to offer vast amounts of digital storage and a variety of different playback programs. The USB DAC integrated within the PA-One gives these PC-using consumers the ability to enjoy their digital music to its full potential, utilising a high quality digital/analogue conversion chipset, while the valve-amplification componentry of the PA-One amplifies this sound with a superlative level of richness and warmth. The USB connection is USB 1.1 and 2.0 compliant, and will decode sampling frequencies ranging from 35kHz to 192kHz.

The valves themselves have been carefully selected, and consist of 2x6SL7, 2x6SN7, and 1xEZ81. These high quality valves allow the PA-One to give the most up-to-date technology sources the true hifi sound that they deserve.



 Input Impedance 50K 
 Output Power 500W (32) 
 Output Impedance 32~300 
 Input Sensitivity 300mV 
 Frequency response 20Hz~20KHz (+0dB, -0.5dB) 
 THD 0.5% 
 Track Balance ±0.5dB 
 S/N Ratio  90dB
 Input Interface 1×Balance Input, 1×RAC Input,
1×Coaxial, 1×Optical, 1×USB
 Output Interface 2x Standard earphone Jack
        (1×High/low impedance each 1pair)        
 Vacuum Tube 2×6SL7 2×6SN7 
Dimensions in mm (Width x Height x Depth) 180 x 284.5 x 163.5
Net Weight 7.5kg 

Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

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