Control Amplifiers

C-700u

Luxman’s new C-700u preamp benefits from the same uncompromising construction and attention to detail as the D-06u. At its heart lies Luxman’s fourth-generation ODNF (Only Distortion Negative Feedback) amp circuit, which restricts feedback to distortion components only, thus greatly enhancing signal-to-noise performance. This is directly coupled to the LECUA 1000 attenuator circuit, trickled down from the flagship C-900u preamp, allowing an extremely fine degree of volume control and left/right balance adjustment whilst maintaining sound quality at the highest level.

 

Exceptional signal purity doesn’t have to mean stripped-to-the-bone facilities – not when they are implemented with Luxman’s no-compromise approach. The C-700u includes precision bass and treble tone adjustment (extremely useful given the variability of today’s music formats), a ‘loudness’ control for low-level listening, a ‘line straight’ button that bypasses the tone controls, and phase selection for the balanced inputs. The FL display can even be zoomed in stages via the remote, ensuring key information remains readable no matter how far the listener is from the preamp (the D-06u shares this feature).

"The sound was open, clean transparent. No haze obscurring any of the atmosphere." ~ Hi-Fi News, 2015

In terms of connectivity, the C-700u offers seven line-level inputs (five single-ended RCA and two balanced XLR), plus four line-level outputs (two single-ended and two balanced). Also present are monitor input and record output RCA terminals, an external preamp input for integration with an AV system, and two remote output terminals for integrated system control.

Accessories:

  • RA-22 remote control
  • Power Cable
  • 2 x AAA batteries
  • Safety Cautions
  • Owner's Manual
SPECIFICATIONS
Item Value
Input Sensitivity
LINE 250 mV / 1 V output, 1 kHz, load 50 kΩ
BAL LINE 250 mV / 1 V output, 1 kHz, load 100 kΩ
LINE → BAL LINE 250 mV / 1 V output, 1 kHz, load 100 kΩ
BAL LINE → LINE 250 mV / 1 V output, 1 kHz, load 50 kΩ
Maximum Output
LINE 11 V / distortion 0.1 %, 1 kHz, load 50 kΩ
BAL LINE 11.5 V / distortion 0.1 %, 1 kHz, load 100 kΩ
LINE → BAL LINE 11.5 V / distortion 0.1 %, 1 kHz, load 100 kΩ
BAL LINE → LINE 11 V / distortion 0.1 %, 1 kHz, load 50 kΩ
Input impedance
LINE 46 kΩ / 1 kHz
BAL LINE 67 kΩ / 1 kHz
Unselected LINE 33 kΩ / 1 kHz
Unselected BAL LINE 67 kΩ / 1 kHz
Output impedance
LINE 90 Ω / 1 kHz
BAL LINE 600 Ω / 1 kHz
Total harmonic distortion
LINE 0.007 % / 1 V output, 20 Hz - 20 kHz, load 50 kΩ
BAL LINE 0.010 % / 1 V output, 20 Hz - 20 kHz, load 100 kΩ
LINE → BAL LINE 0.007 % / 1 V output, 20 Hz - 20 kHz, load 100 kΩ
BAL LINE → LINE 0.009 % / 1 V output, 20 Hz - 20 kHz, load 50 kΩ
Frequency response
LINE +0, −0.1 dB / 1 V output, 20 Hz - 20 kHz, load 50 kΩ
+0, −3.0 dB / 1 V output, 5 Hz - 120 kHz, load 50 kΩ
BAL LINE +0, −0.2 dB / 1 V output, 20 Hz - 20 kHz, load 100 kΩ
+0, −3.0 dB / 1 V output, 5 Hz - 80 kHz, load 100 kΩ
LINE → BAL LINE +0, −0.2 dB / 1 V output, 20 Hz - 20 kHz, load 100 kΩ
+0, −3.0 dB / 1 V output, 5 Hz - 110 kHz, load 100 kΩ
BAL LINE → LINE +0, −0.2 dB / 1 V output, 20 Hz - 20 kHz, load 50 kΩ
+0, −3.0 dB / 1 V output, 5 Hz - 85 kHz, load 50 kΩ
S/N ratio
LINE 125 dB (IHF-A) / distortion 0.1 %,1kHz, load 50 kΩ
BAL LINE 122 dB (IHF-A) / distortion 0.1 %,1kHz, load 100 kΩ (ATT. −87dB)
LINE → BAL LINE 122 dB (IHF-A) / distortion 0.1 %,1kHz, load 100 kΩ
BAL LINE → LINE 125 dB (IHF-A) / distortion 0.1 %,1kHz, load 50 kΩ (ATT. −87dB)
Tone control
Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
Loudness Control
100 Hz +7 dB
10 kHz +5 dB
Power consumption 28 W / 2 W (at standby)
Power supply 230 V ~ (50 Hz)
Max. external dimensions 440 (W) × 130 (H) × 430 (D) mm
Weight 14.6 kg (main unit only)