Loudspeakers

Simaudio's partnering ACE 'A Complete Experience' all-in-one music player is equipped with a very substantial power supply and robust Class AB amplifier that belies its modest 50W specification. I put the MOON ACE through its paces on the bench where it achieved a far higher 2x65W/8ohm and 2x100W/4ohm with 80W, 145W, 235W and 240W into 8, 4, 2 and 1ohm loads under dynamic conditions. That 15.5A current reserve endows the ACE with more than sufficient grunt to grapple with the Voice 22's low 4ohm nominal impedance and very low 1.6ohm EPDR (Equivalent Peak Dissipation Resistance) at bass frequencies.

The response is flat and extended down to –0.5dB/1Hz and out to –0.15dB/20kHz and –1.5dB/100kHz, all from a moderate 0.07-0.10ohm output impedance (20Hz-20kHz) so the system response will not deviate markedly from that seen in the lab report. Finally, the ACE's +36.6dB gain and very wide 92.3dB A-wtd S/N ratio (re. 0dBW) round off an impressive package. PM