






McIntosh
C55 2-Channel Preamplifier
- Type: Solid State
- 16 analog and digital inputs
- Includes DA2 Digital Audio Module
- Supports 24-bit/192kHz and DSD512 files
- 8-band analog equalizer
- Subwoofer output
- A certified Roon Tested device
- Connects with Control4 Certification; Works with Crestron Home Certification
Pairs well with
In stock! Ships within 1-2 business days.
90-day risk-free trial
2-Year Warranty
Complimentary shipping & returns
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Overview

The C55 Preamplifier is a pinnacle of sonic excellence designed for audiophiles, music enthusiasts, and dedicated McIntosh fans alike. As a torchbearer of innovation, it takes the baton from its predecessor, the multi award-winning C53, and propels your home audio experience into new realms of audio nirvana. With precision and craftsmanship, the C55 proudly takes its place as a true industry leader.

INPUTS IN ABUNDANCE
With a staggering 16 inputs (9 analog and 7 digital), the C55 becomes the nerve center of your audio universe. Analog inputs include 3 balanced and 4 unbalanced connections, along with 2 phono inputs configurable for either Moving Coil or Moving Magnet phono cartridges to connect your turntable(s). Both phono inputs feature adjustable Gain in 6dB steps from 40dB to 64dB as well as RIAA equalization.
"It has everything needed to make it the beating heart of any high quality music system. It stands out from the crowd, and is an irresistible blend of good looks and musical excellence.” Awarded 5 Stars. – The Ear
The digital section is housed in our DA2 Digital Audio Module and is powered by an audiophile-grade Quad Balanced, 8-channel, 32-bit Digital-to-Analog Converter (DAC). The DA2 offers an array of connections, including an audio-only HDMI Audio Return Channel (ARC)1 input, ushering your TV sound into a new era through your home stereo system. Dolby® and DTS® multi-channel audio formats are expertly converted to exquisite two-channel audio for a captivating listening experience.

The DA2's other 6 digital inputs consist of 2 coaxial, 2 optical, 1 USB, and 1 MCT. The USB input supports DSD512 and DXD 384kHz. The coax and optical inputs decode digital music up to 24-bit/192kHz for high resolution audio playback. And to get the best sound quality from the high definition audio on your SACD collection, the MCT input offers a secure, custom DSD connection when paired with our MCT series of SACD/CD Transports. The entire DA2 module is upgradeable and could be replaced by a future module should new digital technologies become available.
INNOVATIVE OUTPUTS FOR PERSONALIZED LISTENING
To connect the C55 to your power amplifier(s), there are 3 stereo sets of variable balanced and unbalanced outputs that offer advanced connection flexibility. All 3 sets of outputs can be active at the same time, and each can send the audio signal of the source component to 3 separate audio systems.

Additionally, the Main output and Output 1 can be used for bi-amping a single speakersystem via the built-in adjustable High Pass and Low Pass filters. In this setup, the High Pass outputs could be connected to a vacuum tube amplifier, and the Low Pass outputs could be connected to a solid-state amplifier. The adjustable crossover allows you to optimize the performance of your amplifiers to your speaker’s specifications and to your listening preferences. Output 1 offers trim level control, which allows two different amplifiers to be volume balanced when bi-amping.
Furthermore, Output 2 can be configured as either mono or stereo and can send audio signal to a stereo audio system in another room, to a single mono subwoofer, or to 2 separate stereo subwoofers.2

RETURN OF THE PROCESSOR LOOP
The C55 features the return of the Processor Loop, something not available on the last few generations of McIntosh preamplifiers. The Processor Loop allows you to insert an external signal processor (such as our MQ112 Environmental Equalizeror MEN220 Room Correction System), dynamic range expanders, or other devices without having to place it between the preamplifier and power amplifier(s). This is usually more convenient and can allow for better performance.
The Processor Loop is also the perfect place to connect an analog tape recorder, a high-end cassette deck, or a 3-head reel deck that allows you to record from a source component and hear the recording just seconds later so you can monitor your recordings.

NETWORK CONNECTED FOR CONTROL AND UPDATES
In addition to using the included remote control or the front panel controls, the C55 can be connected to your network which will unlock control options offered through our complimentary Connect app. Designed for both Android and Apple devices, the Connect app can be used to control key functions of the C55 including Volume control as well as Input and Output selection.
Select McIntosh source components3 that have a data cable connected to the C55 will be partially controllable via the app's Source Control feature. With Source Control, users will be able to control many of the source unit's functions from the app, such as changing radio stations on a tuner, or playing a disc in a CD Player. This feature will bring added convenience to setups that have a secondary set of power amplifiers and speakers connected to one of the C55's outputs, such as an outdoor system where you will no longer be forced to go inside to control its basic functionality.
Another benefit of adding the C55 to your network is the ability to receive periodic firmware updates. These firmware releases can add new features or provide important performance updates. Watch our McIntosh Connect App: Setup and How to Use video to get acquainted with the app.
The C55 has received Connects with Control4 Certification from Control4®, a leading global provider of smart home automation solutions, with the implementation of their Simple Device Discovery Protocol (SDDP), allowing it to be effortlessly integrated into Control4 automation systems to further enhance the user experience. It has also received Works with Crestron Home certification from Crestron, a global leader in advanced smart home technology. Crestron Home unlocks the full potential of a smart home. It’s the complete package for any size project, delivering a simpler, smarter user experience for homeowners, remarkably fast configuration and deployment for integrators, and the confidence that comes with renowned, best-in-class Crestron control hardware.

ELEVATE YOUR AUDITORY JOURNEY
All this cutting-edge audio technology resides within the iconic McIntosh design – a black glass front panel adorned with blue meters, rotary knobs, and an illuminated logo. The polished stainless steel chassis adds a touch of elegance, making it a perfect companion for amplifiers, CD players, turntables, and more.
Elevate your sound journey with the C55 Preamplifier. Contact your local dealerand embark on an audio adventure like never before.
1) The HDMI ARC input will only play audio from a compatible TV. It will not pass video to or from a TV, or play audio from any non-TV source. 2) Only powered subwoofers will work with this preamplifier. 3) Source components compatible with Source Control: MCD201, MCD205, MCD301, MCD350, MCD500, MCD550, MCD600, MCD751, MCD1000, MCD1100, MCD7009, MCD7010, MCD12000, MCT80, MCT450, MCT500, MR85, MR87, MR88, MR89, MR7084, MVP831, MVP841, MVP851, MVP861, MVP871, MVP881, MVP891, and MVP901.
The terms HDMI, HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. Dolby is a registered trademark of Dolby Laboratories. DTS, DTS-HD, the Symbol, & DTS or DTS-HD and the Symbol together are registered trademarks of DTS, Inc. © DTS, Inc. All Rights Reserved.
Specifications
Electronic Specifications
Number of Channels
2
Total Harmonic Distortion
0.005%
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)
80dB
Signal To Noise Ratio (Moving Magnet)
82dB
Voltage Gain (High Level)
15dB
Voltage Gain (Moving Coil)
Selectable 40dB, 46dB, 52dB, 58dB, or 64dB
Voltage Gain (Moving Magnet)
Selectable 40dB, 46dB, 52dB, 58dB, or 64dB
Input Impedance (Balanced / Unbalanced)
44K ohm, 22K ohm
Connectivity
Balanced Input
3
Unbalanced Input
4
Phono Input Moving Coil
Up to 2 (unit has 2 Phono inputs; each is user configurable as either Moving Coil or Moving Magnet)
Phono Input Moving Magnet
Up to 2 (unit has 2 Phono inputs; each is user configurable as either Moving Coil or Moving Magnet)
Upgradeable Digital Audio Module
Yes: DA2
Digital Coaxial Inputs
2
Digital Optical Inputs
2
Digital MCT Inputs
1
Digital USB Input
1
HDMI (ARC) Input
1
Digital AES/EBU Input
0
Balanced Fixed Output
0
Balanced Variable Output
3
Unbalanced Fixed Output
0
Unbalanced Variable Output
3
Headphone Output
1/4" High Drive with Headphone Crossfeed Director (HXD®)
Input Level Match
Yes, +/- 6dB
Home Theater PassThru
Yes
Unbalanced Analog Connector Type
Premium gold-plated solid brass
Service Port
1
Network Connections
1
Control
Tone Controls
8-band (each band adjustable ± 12dB )
Tone Bypass and Input Assign
Yes
RS232 Control Inputs
Yes
Power Control Outputs
1 Main, 4 Trigger
Rear Panel Data Ports
6
Rear Panel IR Sensor Inputs
Yes
General Specifications
Multi-Chassis or Single
Single, two-layer
Output Meters
Yes
Vacuum Tube or Solid State
Solid State
Power Consumption (On)
75 Watts
Weights & Dimensions
Unit Dimensions (W x H x D)
17.5" (44.45cm) x 7.625" (19.4cm) x 16.5" (41.9cm)
Unit Weight
28 lbs (12.5 kg)
Shipping Weight
43.5 lbs (19.7 kg)
FAQs
Please read our FAQs page to find out more.
Do you price match?
Yes. We match any authorised dealer, including big-box retailers. If you find the same product at a lower price, contact us and we'll match it.
Do you offer free shipping?
Yes — free shipping on every order, with 2-day delivery available on most products. Easy returns and exchanges are included.
Where is your showroom?
We're at 6362 Alder Drive, Houston, Texas. The showroom lets you hear and compare reference-level systems in person before making any decisions. If you're considering a larger purchase or installation, it's well worth the visit.
Can I buy online without visiting the showroom?
Yes. The full product range is available through the online store with free nationwide shipping. For more complex system builds, speaking with one of our advisers first tends to lead to a better result.
Do you offer financing?
Yes. Special financing is available through the BrandSource Credit Card for qualifying purchases, allowing you to spread payments over time with no annual fee. Promotional rebate savings are also available periodically. See the financing page for full details.
Do you install systems as well as sell equipment?
Yes — installation is central to what we do. We design and install whole-home audio and video, home theaters, media rooms, outdoor audio, lighting and motorised shades, and full smart home automation.
Do you provide support after installation?
Yes. We provide ongoing service and support to ensure systems continue performing as intended — not just on installation day, but over the long term.