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McIntosh C70 70th Anniversary Stereo Vacuum Tube Preamplifier

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The C70 70th Anniversary Vacuum Tube Preamplifier harkens back to yesteryear with an all analog design and a retro look. The glass front panel is inscribed with special McIntosh 70th Anniversary lettering. The C70 features one 12AT7 and five 12AX7A... Read More

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The C70 70th Anniversary Vacuum Tube Preamplifier harkens back to yesteryear with an all analog design and a retro look. The glass front panel is inscribed with special McIntosh 70th Anniversary lettering.

The C70 features one 12AT7 and five 12AX7A vacuum tubes that are visible through a glass panel on the top cover. All control operations are done via knobs and rocker switches. Modern LED indicators will denote input selection and volume level. The C70 has seven inputs consisting of two balanced inputs, three unbalanced inputs, and one each of Moving Coil and Moving Magnet phono inputs. For outputs, there are two pairs each of balanced and unbalanced connections.

On the front panel, bass and treble tone controls are included and can be adjusted in 2dB increments via rotary knobs. Rotary knobs are also used to adjust the impedance and capacitance for the phono inputs. In addition to controlling the listening level, the volume knob can also adjust the relative volume balance between the left and right audio channels. A ¼” headphone jack powered by McIntosh's High Drive headphone amplifier is included and features their Headphone Crossfeed Director (HXD®) technology. HXD brings added dimension to your music in a natural sounding way but can be turned off depending on your preferences. Five rocker switches are used to control the following functions: tone control on/ off; change between mono and stereo mode; HXD on/off; and to turn the independent output 1 and output 2 on/off.

The C70 sits atop a beautiful polished stainless steel chassis and features the timeless McIntosh black glass front panel, illuminated logo, control knobs, and aluminum end caps. McIntosh Power Control technology is included with four ports that can automatically turn other connected McIntosh components such as amplifiers, CD players or turntables, on and off. Data ports are also present and can control basic functions of connected McIntosh source components via the C70’s remote control.

Specifications:

Electronic Specifications
  • Number of Channels:  2
  • Total Harmonic Distortion:  0.08%
  • Frequency Response:  +0, -0.5dB from 20Hz to 20kHz,  +0, -3dB from 15Hz to 100kHz
  • Maximum Volts Out (Balanced / Unbalanced):  16V RMS / 8V RMS
  • Sensitivity High Level (Balanced / Unbalanced):  900mV / 450mV
  • Sensitivity Phono (Moving Coil):  0.45mV
  • Sensitivity Phono (Moving Magnet):  4.5mV
  • Signal To Noise Ratio (High Level):  100dB
  • Signal To Noise Ratio (Moving Coil):  75dB
  • Signal To Noise Ratio (Moving Magnet):  75dB
  • Voltage Gain (High Level):  15dB
  • Voltage Gain (Moving Coil):  60dB
  • Voltage Gain (Moving Magnet):  40dB
  • Input Impedance (Balanced / Unbalanced):  44K ohm, 22K ohm
Connectivity
  • Balanced Input:  2
  • Unbalanced Input:  3
  • Phono Input Moving Coil:  1 (adjustable)
  • Phono Input Moving Magnet:  1 (adjustable)
  • Upgradeable Digital Audio Module:  No
  • Digital Coaxial Input:  0
  • Digital Optical Input:  0
  • Digital MCT (DIN) Input:  0
  • Digital USB Input:  0
  • HDMI (ARC) Input:  0
  • Digital AES/EBU Input:  0
  • Balanced Fixed Output:  0
  • Balanced Variable Output:  2
  • Unbalanced Fixed Output:  0
  • Unbalanced Variable Output:  2
  • Headphone Output:  1/4" High Drive with Headphone Crossfeed Director (HXD®)
  • Input Level Match:  No
  • Home Theater PassThru:  No
  • Unbalanced Analog Connector Type:  Premium gold-plated solid brass
  • Service Port:  0
Control
  • Tone Controls:  Bass and Treble
  • Tone Bypass and Input Assign:  Tone Bypass: Yes,  Input Assign: No
  • RS232 Control Input:  No
  • Power Control Output:  2 Main, 2 Switched
  • Rear Panel Data Port:  5
  • Rear Panel IR Sensor Input:  Yes
General Specifications
  • Multi-Chassis or Single:  Single, two layer
  • Output Meters:  No
  • Vacuum Tube or Solid State:  Vacuum Tube: (5) 12AX7A and (1) 12AT7
  • Power Consumption (On):  50 Watts
  • Dimensions (W x H x D):  17.5" (44.45cm) x 6" (15.24cm) x 18" (45.72cm)
  • Weight:  25 lbs (11.3kg)
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