Products C1800 MK-II Two Chassis Preamplifier

C1800 MK-II Two Chassis Preamplifier
Stereo Times Senior Editor Key Kim has choosen the M350 and C1800 MK-II as his 2020 Stereo Times Most Wanted Components Award winner.
The Best of the Best:
The C1800 MK-II is our newest two chassis version of our reference grade C3000 preamplifier featuring a matching external power supply further guarantees interference-free performance.

The C1800 MK-II is specially designed for pure high-end audiophiles who want nothing but the best. The newly design line stage unit features the use two 12AX7 and two 12AU7 vacuum tubes delivering exceptional sound with a very quiet background. The custom wounded power transformer in the power supply unit guarantees an no noise and hum free operation.

With the use of highest quality parts and components, the C1800 MK-II is simply The Best preamplifier that we have ever built.
C1800 MK-II Preamplifier Features:
  • New for the MK-II version with real balanced inputs and outputs. These are real balanced connections, not just singled-ended connection with the use of XLR connectors.

  • New ultra low noise line stage featuring (2) 12AU7 and (2) 12AX7 vacuum tubes.

  • Matching external power supply featuring (1)GZ34, (2) 6V6 and (1) 6SL7 vacuum tubes.

  • Advanced integrated power curcuit with illuminated pushbutton power ON/OFF switches.

  • Rectifier with double choke filtering (two chokes are employed).

  • Custom EI power transformer which guarantees an no noise and hum free operation..

  • Swiss made ELMA selector switche with gold-plated contacts.

  • Swiss made ELMA stepped attenuator with gold-plated contacts, hand built by our engineers.

  • Three pairs of single-ended plus two pairs of balanced inputs.

  • One pair of single-ended and one pair of balanced outputs.

  • Available with black or champagne gold anodized faceplates.


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    Input Impedance: 45,000 Ohms min,110,000 Ohms max
    Output Impedance: 1,200 Ohms
    Maximum Gain: 10.4 dB
    Frequency Response: +/- 1 dB from 5 Hz to 125,000 Hz
    Hum and Noise: -73 dB
    Maximum Output Voltage before Clipping: 45 Volts
    Total Harmonic Distortion: < 0.01%
    Power Consumption: 70 Watts (true RMS)
    Tube Complement for Line Stage: 2 x 12AU7
    2 x 12AX7
    Tube Complement for Power Supply: 1 x GZ34
    1 x 6SL7
    2 x 6V6
    Dimensions: 18.75" W x 14" D x 5.25"H (Line Stage)
    18.75" W x 12.5" D x 5.25"H (Power Supply)
    Net Weight: 26 lbs (Line Stage)
    33 lbs (Power Supply)
    Warranty: 2 Years Parts and Labor

    Specifications subject to change without notice.