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70th Anniversary 2-Channel Vacuum Tube Preamplifier

Model # C70

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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.

"What ever I played the McIntosh duo threw it into our room with stunning clarity and shocking power... the C70 and MC2152 are truly amazing - a visual and audible display like no other." Awarded 5 out of 5 Globes. - Hi-Fi World


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 1/4" headphone jack powered by our High Drive headphone amplifier is included and features our 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. Our 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. Contact your local dealer to learn more.

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
Weights & Dimensions
Unit Dimensions (W x H x D) 17.5" (44.45cm) x 6" (15.24cm) x 18" (45.72cm)
Unit Weight 25 lbs (11.3kg)
Shipping Weight 41.4 lbs (18.8kg)

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Electronics can be large, heavy, and expensive and you probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Questions or Comments?
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