Classé Delta stereo power amplifier

Classé Delta STEREO - A first class demonstration from AZ

The new Delta Stereo takes all of Classé's innovation and know-how and brings it together in a compact stereo amplifier with fantastic performance. For you, this means that you get as close to a perfect reproduction of the music as it was intended to sound by the artist. This is a sonic purity and level of detail that is believable and completely without coloration of the sound. The level of detail is impressive and Delta STEREO has no problems presenting a nice three-dimensional sound image. It all bears the stamp of incredible finesse, because it doesn't matter if you play low or high with Delta STEREO, the sound image is always in perfect balance. Delta STEREO can both play gently and give you a kick in the diaphragm, making it an incredibly versatile communicator.

HIGHLIGHTS:

• Unsurpassed clarity, tonal balance and level of detail
• Three-dimensional sound image with lots of depth and width.
• 2x250 W Class A/B amplifier
• Up to 12.5 W as pure Class A amplifier
• Massive and high-quality power supply
• Specially manufactured toroidal transformer
• Vibration absorbing feet
• Furutec rhodium plated RCA and torque protection speaker plug.

You never run out of power

Delta STEREO is a testimony to Classé's love for Class A, because it is a Class A/B amplifier, where the first 12.5 W of the output power is delivered in pure Class A. For lightly driven speakers, this means that in many cases you listening to a pure Class A amplifier, which fortunately sounds absolutely excellent. When you need the extra muscles, the Class B amplifier steps in, so you never run out of power. With a whopping 2x250 W, Delta STEREO always has full control over even the most demanding speakers, because Classé has equipped it with a specially built toroidal transformer that ensures that there is full bang behind every watt. It is almost 14 kg. monster of a toroidal transformer that always ensures a completely stable power supply.

Unmatched design

To top it all off, Classé has created a design that is just as monumental as its sound. In our humble opinion, one of the best-looking designs we've seen, and it will fit into any room or installation. Only the absolute best materials have been chosen and the finish is completely in a class of its own, which is not least due to the fact that Classé is assembled in one of the most recognized factories.

Reviews

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

Sound stage! - click here .

The Absolute Sound - click here .

AV Guide - click here .

Specifications

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)
82 kΩ
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)
Cross talk
(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)