The DS225 adds another chapter to the Definition Series amplifier story, taking the proven format of the DS450 and scaling it down slightly in size and power, producing an ample 225 WPC into an 8-ohm load.


POWER OUTPUT: 225 watts per channel into 8 ohms, 1% THD; 360 watts per channel into 4 ohms, both channels driven.

FREQUENCY RESPONSE: (-3dB points at 1 watt) 5Hz to 55 kHz.

INPUT SENSITIVITY: 2.15V RMS for rated output (26.0dB Gain) single-ended or balanced.

INPUT IMPEDANCE: 150K ohms single-ended, 300K ohms balanced differential.

OUPUT POLARITY: Non-inverting from single-ended inputs. Balanced pin 2+ (IEC-268).

OUTPUT REGULATION: 0.06dB 8 ohm load to open circuit (Damping factor 167).

OUTPUT CURRENT: 15 amps peak at protective shutdown.

SLEW RATE: 5 volts/microsecond. (20% maximum duty cycle).

RISE TIME: 5.0 microseconds.

HUM & NOISE: 300 microvolts RMS (103dB below rated output IHF A-weighted).


POWER REQUIREMENTS: 100-125VAC 60Hz (200-250VAC 50Hz) 488 watts at rated output (225WPC 8 ohms), 758 watts at 360WPC 4 ohms, 35 watts idle, Standby 1 watt.

DIMENSIONS: 19" (48 cm) W (standard rack panel) x 5 1⁄4” (13.3 cm) H x 14 1⁄4” (36.2 cm) D (front panel back). Optional handles extend 1 1⁄2” (3.8 cm) forward of the 1⁄4” thick front panel. Output connectors extend 0.9" behind rear panel.

WEIGHT: 34.9 lbs. (15.8 kg) Net; 41 lbs. (18.6 kg) Shipping.