Classe DELTASTEREO Stereo Power Amplifier

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Classe DELTASTEREO Stereo Power Amplifier

The Delta STEREO distills all of Classé's innovation and knowledge into a compact high-performance stereo amplifier.

In situations where dual mono amplifiers can't be accommodated, Delta STEREO offers uncompromising performance in a single component.

The first 12.5W of power output are pure Class A, and with a total of 250W per channel at its command (over 350W/Ch @ 2Ω), this compact, powerful amplifier drives loudspeakers with utmost confidence.

Delta STEREO delivers exceptional clarity. Every effort has been made to preserve complete separation between channels, delivering the natural, expansive sound that Classé is legendary for.

Delta STEREO has presence. It’s capabilities are expressed through design and it looks fantastic in any room or installation.

Superb material finishes and a pair of custom-designed illuminated VU meters display power output for both channels beautifully.

Delta Series design concept is to create a monument to sound. This amplifier looks every bit has capable as it sounds.

Frequency response: 1Hz – 650kHz (-3dB, 50Ω source impedance)
Harmonic Distortion: <0.0016% at 1kHz
<0.002% at 10kHz
<0.003% at 20kHz (measurement bandwidth: 500kHz, 25Vrms in 4Ω or 8 Ω)
Peak Output Voltage: 129Vp-p into 8Ω
138Vp-p no load
Input Impedance: 82kΩ (at 1kHz, BAL / SE)
Voltage gain: 29 dB (at 1kHz, BAL / SE)
Intermodulation Distortion: <0.0018% (SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
Slew Rate: >75V / μs
Signal to Noise Ratio: 118dB (120dBA)(A wtd in parenthesis) (22kHz BW)
Output Impedance: 0.009Ω (100Hz), 0.009Ω (1kHz),
0.012Ω (10kHz)
Damping Factor: 850 (at 1kHz, ref 8Ω)
Overall Dimensions: Width: 444mm
Depth (excluding connectors): 492mm
Height: 222mm
Net weight : 46.4 kg
Shipping weight: 52.8 kg


  • Up to 12.5W per Channel delivered in pure Class A operation
  • 250W per Channel total
  • Massive, high-quality power supply
  • Custom toroidal transformer