Arcam P429 Power Amplifier


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Arcam are a UK-based hifi and home cinema manufacturer, based in Waterbeach, Cambridge. With a vast range of awards, five-star reviews and critical acclaims to their name, Arcam are credited with building some of the best stereo and AV components on the market today, worldwide.

The Arcam P429 four channel amplifier builds upon Arcam's renowned success as one of the best sounding hifi and AV separates brands on the market today. Using only the best quality materials and vigorously developed construction methods, the P429 allows for a true audiophile performance and is capable of powering even the most demanding of loudspeakers.

The P429 utlises a Class G amplifier, with a toroidal based power supply. Potential parasitic resonances are reduced by the acoustically damped chassis and transistor output stages. This allows for an accurate and detailed presentation with the guts necessary to portray it properly. 

Continuous power output (20Hz–20kHz at 0.2% THD), per channel 

ST (stereo) and DM (dual mono) modes   
Four channels driven, 4Ω / 8Ω, 20Hz–20kHz  125W / 90W
One channel driven, 4Ω / 8Ω, 1kHz                        180W / 110W                      
BR (bridged) mode   
 Two channels driven, 8Ω, 20Hz–20kHz  270W
 One channel driven, 8Ω, 1kHz  320W
 Harmonic distortion, 80% power, 8Ω at 1kHz 0.002% 


ST (stereo) and DM (dual mono) modes   
Input sensitivity for 100W / 8Ω   0.8V variable down to 7V
Signal/noise ratio (Awtd) ref 100W / 8Ω  112dB 
BR (bridged) mode   
Input sensitivity for 300W / 8Ω           0.6V variable down to 5V            
 Signal/noise ratio (Awtd) ref 100W / 8Ω  110dB
Input impedance  10kΩ 
Frequency response      20Hz–20kHz ± 0.05dB


Mains voltage        110–120V~ or 220–240V~, 50-60Hz 
 Power consumption (maximum) 1kW 
 Dimensions W x D x H (including feet) 433 x 425 x 105mm 
Weight (net)  14.4kg 
Weight (packed)  15.5kg 
Supplied accessories  Mains lead 

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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