The P451 is March Audios' first Purifi based mono-block amplifier. In a matching enclosure to the stereo amplifier range and DAC1, this simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality.


Featuring the new Purifi 1ET400A technology and Bruno Putzeys development of his nCore designs, the P451 delivers extraordinary lo noise and distortion with improved refinement in subjective audio quality.

The class leading technical performance delivers a neutral but captivating musical sound that will suit the finest partnering equipment.  Fully 2 ohm capable with ultra low output impedance, the P451 can deliver up to 450 Watts and 25 Amps ensuring tremendous grip and drive even with the most challenging of speaker loads.


Hand built and individually tested, the P451 is backed up with a 3 year warranty.


  • ​Power Output 

    • 2 Ohms - 450 W rms​

    • 4 Ohms - 425 W rms

    • 8 Ohms - 227 W rms

  • Current Output - 27 Amps

  • THD + N - 0.00017% 

  • Output Noise - 12uV

  • Signal To Noise Ratio - 131 dB(A)

  • Output Impedance - 70uOhms

  • Input Impedance 20 kOhms

  • Frequency Response - 10Hz to 60kHz (+0/-3dB)

  • Voltage Gain 26.5dB - alternative gain settings available, please contact for information.

  • Dimensions 330mm x 180mm x 75mm

  • Supplied with country specific power lead and 2 Gb high quality metal USB drive containing manual and warranty documents

P451 Mono-Block Power Amplifier

SKU: P451-1
$1,750.00 Regular Price
$1,625.00Sale Price
Excluding GST