McIntosh C1100 Vacuum Tube Preamplifier
Ex-demonstration model in excellent condition. We have the original packaging and accessories. Originally purchased in October 2017.
1 in stock
The C1100’s high level inputs have the lowest noise of any McIntosh preamplifier ever produced. It utilises a two-chassis design where the control and power sections are completely separate from the audio section. Absolute isolation of a preamplifier’s two main functions – control and sound – is achieved by this unusual but effective design and will provide you with the purest sound reproduction possible for generations of listening enjoyment.
The C1100 is comprised of the C1100 Controller and the C1100 Vacuum Tube Preamplifier. Inside each, the left and right channels are electrically and mechanically isolated from each other to allow true dual mono operation – resulting in the ultimate stereo separation and sonic purity. The two units are connected together via a pair of specially designed, high performance umbilical cables that are shielded to prevent outside noise from leaking into the audio signal. While they are two separate units, when connected they act as one and are easy to control and operate from the included remote control or the C1100 Controller front panel. Both units’ chassis are comprised of polished stainless steel and hairline brushed black Titanium stainless steel, offering a new degree of richness and refinement.
All power control, data ports and external control connections are located in the C1100 Controller; the introduction of a dual microprocessor allows for an improved robustness of the control system. The C1100 Vacuum Tube Preamplifier houses the audio connections and circuitry, featuring a total of 12 analogue inputs: 6 balanced, 4 unbalanced, plus adjustable loading Moving Magnet and Moving Coil phono inputs. For outputs, 2 sets of balanced and 2 sets of unbalanced connections provide flexibility in connecting to your amplifier. Twelve vacuum tubes (6 each of 12AX7a and 12AT7) power the tube preamplifier. Compared to the C1000 preamplifier which had 8 tubes, the additional 4 tubes in the C1100 lowers its dependency on any solid-state support. The amplifier circuit has much higher common mode rejection, so any noise introduced by interconnect cables is significantly reduced. For personal listening, the headphone jack features a higher output than any of our other preamplifiers, while Headphone Crossfeed Director (HXD®) brings a new depth and spatiality to your music. The Home Theatre Pass Through feature allows for seamless integration into your existing multi-channel home theatre system.
For digital music sources, the C1100 can be connected to and used in conjunction with its digital counterpart – the D1100 Digital Preamplifier. Like the C1100, the D1100 employs a dual mono design and features the most advanced digital-to-analogue converter (DAC) we’ve ever used in order to reproduce your digital music with the same level of excellence that the C1100 gives to your analogue sources. When connected, the C1100 takes over control of the D1100 and its 9 digital inputs, resulting in a single and easy to use interface.
Number of Channels
Total Harmonic Distortion
High Level: 0.005%
+0, -0.5dB from 20Hz to 20kHz
+0, -3dB from 10Hz to 100kHz
Maximum Volts Out (Balanced / Unbalanced)
20V RMS / 10V RMS
Sensitivity High Level (Balanced / Unbalanced)
900mV / 450mV
Sensitivity Phono (Moving Coil)
Sensitivity Phono (Moving Magnet)
Signal To Noise Ratio (High Level)
Signal To Noise Ratio (Moving Coil)
Signal To Noise Ratio (Moving Magnet)
Voltage Gain (High Level)
Voltage Gain (Moving Coil)
Voltage Gain (Moving Magnet)
Input Impedance (Balanced / Unbalanced)
50K ohms, 25K ohms
Multi-Chassis or Single
Multi Chassis (C1100C plus C1100T)
Vacuum Tube or Solid State
Tube, (6) 12AX7a and (6) 12AT7
Power Consumption (On)
Dimensions (W x H x D)
44.45cm x 15.24cm x 45.7cm
C1100C: 12.3 kg
C1100T: 11.3 kg
C1100C: 19.7 kg
C1100T: 17.9 kg