Sony STR-DA1000ES Technical Background page 20

channel x7, 8 ohms, 20 to 20,000 Hz, 0.15%), and exceptional sound quality.
Music is rendered in very high resolution, against a background of silky silence.
Dynamics are powerful but not forced. Bass is vigorous but not boomy. These
receivers are perfect for integration with the most difficult and power-hungry
speakers. Use good speaker cables, a suitable disc player and a Super Audio
Compact Disc that you know well. Then sit back and listen carefully. The results
speak for themselves.
ES Receivers V3.0 Page 20