Classe Delta Stereo Power Amplifier

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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 uncompromizing performance in a single component.

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  • Amplification

    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.

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

    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.

    • Hand-laid circuit boards
    • 6-layer circuit boards provide for shortened signal and power pathways with lowest noise
    • 22 4-pole Mundorf® capacitors
    • Custom-made Navcom® feet to absorb vibrations
    • Furutech® rhodium-plated RCA and torque-guard speaker connectors
  • Design

    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.

  • Specs


    17.50 in (444 mm)
    19.37 in (492 mm)
    8.74 in (222 mm)


    Gross Weight
    116.4 lbs (52.8 kg)
    Net Weight
    102.3 lbs (46.4 kg)


    Frequency Response
    (-3dB, 50Ω source impedance)
    1Hz – 650kHz
    Continuous Output Power
    (at 1kHz, 0.1% THD+N)
    12.5W / 8Ω delivered in pure class A operation
    250W / 8Ω
    500W / 4Ω (with AC line held constant)
    350W / 2Ω (with AC line held constant)
    Harmonic Distortion
    (measurement bandwidth:
    500kHz, 25Vrms in 4Ω or 8 Ω)
    <0.0016% at 1kHz
    <0.002% at 10kHz
    <0.003% at 20kHz
    Harmonic Distortion
    (measurement bandwidth:
    90kHz, 25Vrms in 4Ω or 8 Ω)
    <0.0007% at 1kHz
    <0.001% at 10kHz
    <0.0025% at 20kHz
    Peak Output Voltage
    (nominal AC line)
    129Vp-p into 8Ω
    138Vp-p no load
    Input Impedance
    (at 1kHz, BAL / SE)
    Voltage Gain
    (at 1kHz, BAL / SE)
    Intermodulation Distortion
    (SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
    Intermodulation Distortion
    (CCIF) (8Ω or 4Ω, BAL / SE)
    Signal-to-Noise Ratio
    (A wtd in parenthesis) (22kHz BW)
    118dB (120dBA)
    (one channel driven to 250W / 8Ω)
    124dB (100Hz), 107dB (1kHz),
    90dB (10kHz)
    Slew Rate
    75V / μs
    Output Impedance
    0.009Ω (100Hz), 0.009Ω (1kHz),
    0.012Ω (10kHz)
    Damping Factor
    (at 1kHz, ref 8Ω)