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Rated Delta stereo power amplifier

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Classé Delta STEREO – A first class demonstration from A-Z

The new Delta Stereo takes all of Classé’s innovation and know-how, and packs it into a compact stereo amplifier with stunning performance. For you, it means getting as close to a perfect representation of the music as it was intended to sound by the artist. There is a sonic purity and detail that is believable and completely without coloration of the sound. The level of detail is impressive and Delta STEREO has no problem presenting a nice three-dimensional sound image. It all has an incredible finesse, because no matter if you play low or high with Delta STEREO, the sound is always in perfect balance. Delta STEREO can play softly and kick you in the gut, making it an incredibly versatile performer.


  • Unparalleled clarity, tonal balance and detail
  • Three-dimensional sound with plenty of depth and width.
  • 2×250 W Class A/B amplifier
  • Up to 12.5 W as pure Class A amplifier
  • Solid and high quality power supply
  • Custom-made toroidal transformer
  • Vibration absorbing feet
  • Furutec rhodium-plated RCa and torque-protecting speaker connector.

You never run out of power

The Delta STEREO is a testament to Classé’s love of Class A, because it’s a Class A/B amplifier, with the first 12.5 W of output power delivered in pure Class A. For light-driven speakers, this means that in many cases you’re listening to a pure Class A amplifier, which fortunately sounds quite excellent. Then, when you need the extra muscle, the Class B booster kicks in so you never run out of steam. With a full 2×250 W, Delta STEREO always has full control over even the most demanding speakers, because Classé has equipped it with a custom-built toroidal transformer that ensures that there is full power behind every watt. This is an almost 14 kg. monster of a toroidal transformer that always ensures a completely stable power supply.

Outstanding design

To top it all off, Classé has created a design that’s every bit as monumental as its sound. In our humble opinion, it’s one of the best looking designs we’ve seen and will fit into any room or installation. Only the very best materials have been chosen and the finish is absolutely first class, not least because Classé is assembled in one of the most renowned factories.


Stereonet – Product of the Year Awards 2021 – click here.

Soundstage! –
click here

The Absolute Sound –
click here

AV Guide – click here.



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)

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 brackets) (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)

Rated Delta stereo power amplifier

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