This is a write-up and detailed measurements of the March Audio P122 class D Hypex based stereo power amplifier. It was sent to me by the company (@March Audio). The P122 costs US $750.
Due to my relationship with company owner, I won't be performing a review or providing a recommendation one way or the other. So don't look for panthers on pictures either.
The P122 uses similar packaging to the rest of March Audio products:
There is just a touch button that turns the unit on and off (really on and standby).
The back panel has very nice and really long speaker terminals:
In use, the P122 never complained or get warm. It passed all the tests without going into protection mode.
Power supply is switching as noted on the unit so works as is worldwide.
Amplifier Audio Measurements
As usual we start with our dashboard of 1 kHz tone into 4 ohm load:
As noted on the THD+N panel, performance is roughly the same as the spec in one channel and slightly better in the other. Distortion and noise combined is near top of class:
Signal to noise ratio is excellent:
Crosstalk is respectable as well:
Frequency response is good but not flat out to infinity as some amps are:
Multitone test shows a few odd spikes in mid frequencies:
But levels are nearly 100 dB down so not a cause for concern.
Amplifier Power Measurements
Let's start with 4 ohm:
We are a bit shy of the specification on power but distortion and noise is much better than typical mass market product. Same is true of 8 ohm load:
Not sure what explains the shortfall in power.
These amplifiers have regulated switching power supplies so usually don't produce more power than continuous:
Conclusions
While the power level is on the low side, the performance is much better than typical brand name amplifiers.
------------
As always, questions, comments, recommendations, etc. are welcome.
Amazing things you learn. Apparently there is a Figurine Panther conference in Las Vegas! Naturally the panthers are pounding on me to take them there. I called the airline and they said they cannot go as luggage and I have to buy them all separate tickers. So please donate everything you can so I can send them on this trip using : https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
Due to my relationship with company owner, I won't be performing a review or providing a recommendation one way or the other. So don't look for panthers on pictures either.
The P122 uses similar packaging to the rest of March Audio products:
There is just a touch button that turns the unit on and off (really on and standby).
The back panel has very nice and really long speaker terminals:
In use, the P122 never complained or get warm. It passed all the tests without going into protection mode.
Power supply is switching as noted on the unit so works as is worldwide.
Amplifier Audio Measurements
As usual we start with our dashboard of 1 kHz tone into 4 ohm load:
As noted on the THD+N panel, performance is roughly the same as the spec in one channel and slightly better in the other. Distortion and noise combined is near top of class:
Signal to noise ratio is excellent:
Crosstalk is respectable as well:
Frequency response is good but not flat out to infinity as some amps are:
Multitone test shows a few odd spikes in mid frequencies:
But levels are nearly 100 dB down so not a cause for concern.
Amplifier Power Measurements
Let's start with 4 ohm:
We are a bit shy of the specification on power but distortion and noise is much better than typical mass market product. Same is true of 8 ohm load:
Not sure what explains the shortfall in power.
These amplifiers have regulated switching power supplies so usually don't produce more power than continuous:
Conclusions
While the power level is on the low side, the performance is much better than typical brand name amplifiers.
------------
As always, questions, comments, recommendations, etc. are welcome.
Amazing things you learn. Apparently there is a Figurine Panther conference in Las Vegas! Naturally the panthers are pounding on me to take them there. I called the airline and they said they cannot go as luggage and I have to buy them all separate tickers. So please donate everything you can so I can send them on this trip using : https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/