Technics SU-C3000

Commentary

Control amplifier that uses VGCA.

A newly developed low-noise amplifier VGCA (Variable Gain Control Amplifier) is used to accommodate the wide dynamic range of next-generation digital formats.
In VGCA, we have adopted a method in which the gain of the amplifier itself is changed instead of the amplifier configuration in which the signal is reduced by the input volume and then amplified, which was used in conventional amplifiers. This reduces noise and deterioration of dynamic range even when the volume is reduced.
A high S/N ratio has been obtained in combination with the battery drive power supply used in the power supply section, and clear sound reproduction with little residual noise has been achieved.

The SU-C7000Ver. 4.0 also uses a battery-driven power supply that uses lead-acid batteries.
By being battery driven, the AC power supply and signal circuit are completely separated, and noise loop caused by connection code and AC power supply and switching noise of the power circuit are eliminated.
The battery can be fully charged for approximately four hours, and automatically switches to AC power when the battery is low.

The volume uses a resistor rotation type volume.
This volume employs a unique method in which the brush integrated with the terminal is fixed and the resistor is rotated. This reduces the number of dissimilar metal joints that degrade sound quality.
In addition, fine particle type carbon is used for the resistor to reduce strain.

TAKEII electrolytic capacitors are used.
This condenser is an improved version of an electrolytic condenser using a bamboo mixed separator, and its mechanical and electrical characteristics have been greatly improved by improving the basic structure of aluminum foil and electrolyte.

R-core transformer is used for power transformer.
This transformer has a circular core with a uniform magnetic flux. Moreover, since there is no junction in the core, joint part in the core, leakage magnetic flux is little, reducing sound quality degradation.

The chassis structure adopts THCB (Technics Hybrid Construction Base), and excellent vibration damping characteristics are obtained by multi-layer structure of materials with different vibration damping characteristics.

Equipped with two pre-out terminals for bi-amping.

Uses gold-plated glass epoxy board.

3P-2P type detachable power cord is used.

Equipped with XLR canon connectors for balance input and output.

OCC wire is used for internal wiring.

The side wood is finished with real wood.

Model Rating

Type	Control amplifier
Total harmonic distortion rate (20 Hz to 20 kHz)	Phono MM (Rec out, EIAJ) : 0.003% Line1/2, CD, Tape1/2 (Pre-out, EIAJ) : 0.002%
Signal-to-noise ratio	Phono MM:86dB(EIAJ) Line1/2, CD, Tape1/2 : 112 dB (EIAJ) 124 dB (IHF A Gain = 0 dB, S = 2 V)
Frequency characteristic	Line1/2, CD, Tape1/2 : 20 Hz to 20 kHz + 0 -0.1 dB 0.7 Hz ~ 125 kHz + 0 -3dB Balanced : 8 Hz to 50 kHz ± 0.3 db
Rated output	Pre-out1/2 : 2V/47 Ω Balanced : 2V/47 ohm
Input Sensitivity / Impedance	Phono MM : 3.5mV/47k Ω Line1/2, CD, Tape1/2 : 200mV/47k Ω Balanced : 200mV/600 ohm
Maximum allowable input	MM:100mV(0.05%)
Pwer	100 VAC, 50Hz/60Hz
Power consumption	30W(AC)
External dimensions	Width 483x Height 134x Depth 375 mm
Weight	13.8 kg (including battery power supply)
Sold Separately	Battery Drive Power Supply LC-R2212X2AU (2x12V, 2.2Ah/20HR) (Repair parts, production to order 2.5 months, ¥ 19,800)