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

    OVERALL DIMENSIONS

    Width
    17.50 in (444 mm)
    Depth
    19.37 in (492 mm)
    Height
    8.74 in (222 mm)

    WEIGHT

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

    GENERAL

    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)
    82kΩ
    Voltage Gain
    (at 1kHz, BAL / SE)
    29dB
    Intermodulation Distortion
    (SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
    <0.0018%
    Intermodulation Distortion
    (CCIF) (8Ω or 4Ω, BAL / SE)
    <0.004%
    Signal-to-Noise Ratio
    (A wtd in parenthesis) (22kHz BW)
    118dB (120dBA)
    Crosstalk
    (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)
    850