Dual CV 6040
The Dual CV 6040 is a stereo integrated amplifier introduced in the late 1980s as part of Dual's Studio Concept series. It offers a balance of performance and simplicity, making it a solid choice for casual listeners.
The output stage uses Sanken 2SC3854 and 2SA1940 transistors and does not include a speaker protection relay.
The soundstage is clean and well-defined, with slightly emphasized bass.
Manufacturer: Dual
Status: Active company
Official website: dual.de
Service manual: ServiceManual_CV6040.pdf
General Specifications
Maximum power (8Ω): 50WFrequency response (-3dB): 10Hz-70kHz
THD+N (1kHz): 0.01%
Signal to noise ratio (Line): 90dB
Signal to noise ratio (MM): 70dB
Crosstalk attenuation: 80dB
Input sensitivity (Line): 200mV
Input sensitivity (MM): 2.5mV
Speaker load impedance: 8Ω-16Ω
Dimensions (WHD): 440×82×245mm
Weight: 5.5kg
Produced: 1989-1992
Initial price: 450DM
Measured Values
Maximum power (8Ω): 43WFrequency response (20Hz-20kHz): <0.3dB
Channel imbalance: <0.3dB
THD (1kHz, 1W): 0.0022%
THD+N (1kHz, 1W): 0.01%
THD (1kHz, 20W): 0.0016%
THD+N (1kHz, 20W): 0.0061%
IMD (70Hz, 5kHz, 1W): 0.013%
Noise: -60.7dB
Amplification: 103.9
DC offset L: 0.8mV
DC offset R: -1.0mV
Factory Specification Sheet
Factory specification images are sourced directly from the device's original service manual or user manual. These documents are produced by the manufacturer and provide authoritative information on the product's specifications.
Maximum Power
Maximum power is measured using 8Ω resistors on both channels. A 1kHz sine wave input signal is applied and gradually increased until higher harmonics rise significantly. Typically, this is the point at which output clipping occurs.
Frequency Response
Frequency response is measured using several equilizer settings. 'Flat' indicates the tone controls are either turned off or set to their neutral position. 'Max' and 'Min' refer to the maximum and minimum tone control positions, respectively. In the phono section, the expected response follows the RIAA equalization curve.
Residual Noise
These graphs display the noise levels at various volume positions. To eliminate any interference from the input signal, the input lines are shorted during the measurement. Generally, the noise is highest at the mid-point of the volume range (50%)
Distorsion
Total harmonic distortion (THD) is measured using a 1kHz sine wave input, with the output level adjusted to meet different conditions. Intermodulation distortion (IMD) is measured using 'two sine' input signal. THD versus voltage is measured with a 1kHz sine wave input, while THD versus frequency is measured at various output levels.
