Manufacturers of receivers like to boast of high output power. This is also the case with the AVR-X4400H, which is to have as much as 200 W, but this applies to the situation of controlling one channel at a load of 6 Ω.
In our measurements, we assume the basic 8-ohm load, in such conditions the AVR-X4400H also achieves a high 162W. When two channels are controlled, it provides 2 x 154 W, five-channel mode up to 5 x 99 W, and with all nine terminals - 9 x 50 W, also reaching a high temperature, so you should not set anything on the AVR-X4400H.
It is also possible to load 4 ohms, in all channels, but for this purpose it is recommended to select such mode in the impedance selector. The power then drops radically - even if one channel is actuated, it is only 57 W. This is due to the very protective configuration of the terminals, which protects against temperature rise. Because it leaves a large reserve in the power supply itself (common for all terminals), so with the connection of further terminals, the power decreases slightly, by 5 x 51 W to 9 x 42 W.
The noise (S / N) spacing is 80 dB and the 101 dB dynamics are not sensational but typical for A / V receivers. The frequency characteristics (Fig.1) are very good, the decrease at 100 kHz is -1.6 dB for 8 Ω and -2.3 dB for 4 Ω. The harmonic spectrum (Figure 2) also looks elegant, none exceeds the ceiling of -90 dB.
