Audio Database

SU-C5000
Commentary

Control amplifier equipped with class AA system and active servo power supply.

The phono equalizer amplifier uses the classAA method.
By installing a SEPP output stage current drive amplifier with a large current supply capability, voltage amplification in A-class state is realized without the output current being affected by the impedance fluctuation of the RIAA element.
In addition to dual low-noise FET differential amplification and the first stage high-rate circuit configuration with cascode, a high S/N ratio of MM92dB (2.5 mV output) and low distortion of 0.0008% (20 Hz to 20 kHz) are achieved.

The classAA method is also used for the power amplifier section.
The load condition of the power amplifier section of the control amplifier varies depending on the input impedance and connection code of the power amplifier, causing distortion. By adopting the classAA method, the power amplifier can be driven with A-class low-distortion, high-quality reproduction without being affected by these fluctuations.

The volume uses 4-row configuration wide D range volume.
This volume achieves low distortion and low noise by using a resistor with a smooth mirror surface and a gold-plated wire brush. In addition, two of the four volume series are operated as gain control of the output amplifier, improving the S/N ratio in actual use and at low power reproduction.

The power supply section uses an active servo power supply.
The active servo power supply combines a constant-voltage IC dedicated to the power supply with excellent temperature stability and a wide-band IC with excellent high-frequency characteristics to achieve regulation superior to that of car batteries and low noise over a wide frequency range from low to high.
In addition, a line filter for electromagnetic interference has been adopted as a countermeasure against power supply noise that may flow in from the primary power supply line. In addition, the power supply for audio and video signals is an independent power supply using separate windings, and the ground line is completely separated. Thus, thorough consideration is given to signal contamination from the power supply.

In addition to eight audio input systems, it is equipped with an AV input Route 3 + VTR input / output system that can select video signals simultaneously.
There are two audio outputs (front / rear) and one video monitor output.

Equipped with CD direct function.
With this function, the input signal can start only the gold contact relay and can be directly connected to the volume using the gold plated wire brush.

Input / Rec / BGV uses an independent electronic selector to reduce signal degradation.

Model Rating
Type Stereo control amplifier
Total harmonic distortion factor
(20 Hz to 20 kHz)
Phono1, 2 mm : 0.0008% (EIAJ)
Phono1, 2 mc : 0.0009% (EIAJ)
Tuner, CD, aux, AV1/TV, AV2, digital processor, tape1, tape2/VCR, DAT : 0.0007%
Direct-CD, digital processor : 0.0006%
Signal-to-noise ratio Phono1, 2 mm : 92 dB (IHF66)
87dB(EIAJ)
Phono1, 2 mc : 76 dB (IHF66, 250 μ V)
81dB(EIAJ)
Tuner, CDs, aux, AV1/TV, AV2, digital processortape1, tape2/VCR, DAT : 109 dB (IHF66)
100dB(EIAJ)
Direct-CD, digital processor : 110 dB (IHF66)
100dB(EIAJ)
Maximum allowable input MM:160mV
MC:6.4mV
Pwer 100 VAC, 50Hz/60Hz
Power consumption 15W
External dimensions Width 484x Height 131x Depth 360 mm
Weight 11.0kg