The Anthem MRX 1140 was tested and praised by Gene in his AudioHolics March 2022 review. His measurements showed values somewhat higher than Anthem’s claimed 140 Wpc. Importantly, this review did show this AVR can drive 4Ω loads.
https://www.audioholics.com/av-receiver-reviews/anthem-mrx-740-1140-receivers
The review shows more details about the power measurements than summarized below:
View attachment 56841
¹ The CFP-BW test measured 203 W into 4Ω for a fraction of a second, but after that was 163 W due to current limitation.
² For similar reasons, the 1kHz Psweep into 4Ω was 176 W at 0.1% THD+N, and was limited to 163 W at 1%.
I'm puzzled by the the 3rd row of the table, where it showed 55W as measured by the 1kHz Psweep method into 8Ω at 1% THD+N. Was this a typo, or was it explained in the review
@gene ?
In the review, Gene explained three different methods he used to measure power:
- Continuous Full Power Bandwidth (CFP-BW) from 20Hz to 20kHz into 8 and 4Ω loads (up to two-channels)
- 1kHz Power Sweep vs. Distortion (1kHz PSweep) – an instantaneous power vs. distortion test at 1kHz popularized by the print magazines. This test often masks slew-related and/or frequency response problems some amplifiers exhibit at the frequency extremes, and thus inflates the measured power results. It provides a number for consumers to compare and argue about over on the forums.
- 1kHz CEA-2006 Burst Method testing (Dynamic PWR). This is a dynamic power measurement, adopted from the car industry, similar to IHF method, but a bit more difficult for an amplifier and more representative of real musical content.
The Stereophile review of the Focal Aria 936 claims a nominal impedance of 8 ohms, with a minimum impedance of 2.8 ohms, as shown by Swiz in his OP. The review estimated sensitivity at 89.5 dB, somewhat lower than Focal's 92 dB. Focal recommends amplifier power of 50–300W.
