Classe Delta Stereo Power Amplifier

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.

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