TEST BENCH

Analog Performance All data were obtained from analog test signals applied to unbalanced inputs. Reference input level was 75 mV; reference output is 1 watt into 8 ohms. 1.4v input produced full power.

Output at clipping (1 kHz into 8/4 ohms) 1 channel driven: 364/635 W (25.6/28 dBW) 2 channels driven (8/4 ohms): 315/520 W (25/27.2 dBW) 5 channels driven (8 ohms): 265W* (24.2 dBW) 7 channels driven (8 ohms): 225W*(23.5 dBW)

Distortion at 1 watt (THD+N, 1 kHz) 8/4 ohms: 0.015/0.02%

Distortion at Rated Power (THD+N, 1 kHz) 8/4 ohms: 0.02/0.06%

Noise level (A-wtd): -87.3 dB (dBw) Frequency response: <10 Hz to 20 kHz +0.2, -0. dB (+3 dB @ 30 kHz; -3 dB @ 60 kHz) *Estimated results due to test-suite and AC power limits

The Axiom A-1400-8 produced a lot of power, no question about it - enough that I've had to estimate power tests of multiple channels, since with 5 or more channels at clipping the Axiom amp draws all the current my wall circuit can provide when maintaining line voltage at 120vac. (As well, I only have only 7 channels of high-power test-load resistors; every time I get more loads-and these things aren't cheap - they make amps with more channels!) Noise and distortion performance were very good throughout, but I did note an ultrasonic component imposed on clipped waveforms. Moreover, frequency response exhibited a slight rise over the top third-octave or so, continuing to a +3-dB peak at about 30 kHz and rolling off above that point at about 12 dB/octave. -Daniel Kumin