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The C-700u control amplifier is our new middle of the range model that inherits some of our magnificent innovations, seen in our high end model, the C-900u, including our latest ODNF version 4.0 circuit, with significantly improved distortion characteristics and signal to noise performance and our new LECUA 1000, a computerized attenuator directly connected to the amplifier circuit, which enables smooth volume changes without any deterioration of sound quality. We are pursuing the concept of a simple and high quality control amplifier, exclusively designed for line level signals. What is more, this unit is also multifunctional, the loudness function interacting with the volume and tone controls, external pre-input connectivity and a fluorescent display with zoom and dimmer controls. Features like these make the C-700u suitable for the control center of your system, a new-generation of control amplifier, displaying performance consistent with high level functionality.
Large capacity power supply
In order to embody the philosophy of "Power Amplifier Driver", meaning a component which powerfully drives a power amplifier connected in the next stage, the C-700u has a large capacity power supply featuring an OI-type power transformer and is regulated by two 3,300μF blocking capacitors. This circuit creates a firm power base to support the sound quality of the C-700u.
Zoom display mode
The highly visible fluorescent display is equipped with a dimmer and has a four level zoom mode, adjusted via the remote control. The two part display usually displays the input source and volume level and is also eye-friendly and clearly visible from the listening position.
External pre-input terminals and balanced phase selection
The C-700u is equipped with unbalanced external pre-amp input terminals to which an external pre-amplifier in your AV system may be connected. The balanced inputs have the option of phase switching (pin no.3 HOT to pin no.2 HOT) which can be adjusteded and memorized for each balanced input. This is useful for connecting to units made by other manufacturers.
New 3D layout in the pre-amp section
The new LECUA 1000 system uses a 3D component layout to both minimize the signal route and improve it's efficiency. The ultimate solution for a high class control amplifier is realized by the direct connection between the attenuator circuit and the amplification circuit, eliminating the concept of independent, individual circuit blocks.
|Input sensitivity/Input impedance
||Unbalanced rating 1V/90Ω, max. 11V
Balanced rating 1V/600Ω, max. 11.5V
||20Hz to 20kHz (+0, -0.1dB)
5Hz to 120kHz (+0, -3.0dB)
|Total harmonic distortion
||Unbalanced 0.007% (20Hz to 20kHz)
Balanced 0.010% (20Hz to 20kHz)
|S/N ratio (IHF-A)
|Negative feedback circuit
|Max. tone control range
||BASS: ±8dB at 100Hz
TREBLE: ±8dB at 10kHz
|Remote control functions
||・Operation・Dimmer・ Input selector
・Output mode・Balanced phase selection
・Record output・External pre-input
・Line straight・Loudness・Volume up/down
2.0W (in standby mode)
||440(W) x 130(H) x 430(D) mm
(including 17mm front panel knob and 14 mm rear panel speaker terminals)
||Remote control (RA-22)