McIntosh C500 (2003-2007)
At 40 lbs, this dual-chassis preamplifier is built to McIntosh's usual unrelenting standards.
Overview
The McIntosh C500 stereo preamplifier was produced from 2003 to 2007. It splits critical functions into separate boxes, even within a single system. The C500 uses a dual-chassis design: one chassis holds the audio processing circuitry, the other holds the power supply and the microprocessor-based control section. The separation aims to eliminate noise coupling and keep the signal path as pure as possible. McIntosh marketed it as both a "Control Center" and a "Line/Phono Preamplifier." It came in two configurations, tube (C500T) and solid-state (C500P), and each pairs with the same controller unit (C500C). Buyers got to pick the sonic character without giving up McIntosh build quality or operational precision.
Specifications
| Manufacturer | McIntosh Laboratory |
| Year of Production | 2003-2007 |
| Product Type | Preamplifier |
| Frequency Response | +0, -0.5dB from 20Hz to 20kHz |
| Rated Distortion | 0.005% |
| Maximum Output | 16 Volts BAL, 8 Volts SE |
| Signal to Noise | 100dB |
| Input Impedance | 50k ohms |
| Output Impedance | 50 ohms |
| Phono Input Sensitivity | 2.5mV |
| Phono Input Impedance | 47k ohms, 100pF |
| Phono Overload | 500mV @ 1kHz |
| Phono S/N | 80dB |
| Phono Equalization | RIAA ±0.5dB |
| High Level Input Sensitivity | 500mV |
| Tone Control Range | ±12dB @ 20Hz and 20kHz |
| Filter Frequencies | High 10kHz, Low 50Hz |
| Headphone Output Impedance | 40 ohms |
| Headphone Output Power | 1/2 Watt |
| Tube Complement | 12AX7A (4), 12AT7 (2) |
| Dimensions (W x H x D) | 17-1/2" (44.45 cm) W x 7" (17.78 cm) H x 18" (45.72 cm) D |
| Weight | 40 lbs (18.14 kg) |
| Power Requirements | 120 Volts 50/60Hz, 50 Watts |
Key Features
Dual-Chassis Design with Isolated Power and Control
The C500's defining trait is its two-box construction. The audio chassis and the control/power supply chassis are housed separately. McIntosh calls this a "luxurious two box design," and it isolates the sensitive analog circuitry from digital switching noise and transformer hum. According to McIntosh, the audio and control sections also get separate transformers and voltage regulation, which minimizes interference and preserves signal integrity.
Tube or Solid-State Audio Chassis Option
Buyers could choose between the C500T (tube) and C500P (solid-state) versions for the audio processing module. The tube version uses four 12AX7A and two 12AT7 tubes, and promises the warmth and harmonic richness associated with vacuum tube amplification. The solid-state version delivers the speed and neutrality expected from modern transistor circuits. This kind of configurability is rare. It let audiophiles tailor the preamp to their system and taste without changing the control interface or build standard.
Dual Mono and Microprocessor-Controlled Operation
Internally, the C500 is a dual mono design. The left and right channels are completely independent from input to output, which reduces crosstalk and improves stereo imaging. A microprocessor-controlled system handles volume and input selection, and it drives a precision resistor ladder network. That eliminates the wear and channel imbalance common in traditional potentiometers, so level settings stay accurate and repeatable over time. Gold-plated connectors are used throughout for reliable signal transfer.
Comprehensive Phono Stage with RIAA Accuracy
The built-in phono stage has a sensitivity of 2.5mV and an input impedance of 47k ohms and 100pF, which suits moving magnet cartridges. It adheres to RIAA equalization within ±0.5dB and offers 80dB of signal-to-noise ratio. Reviewers noted that it compared favorably to outboard phono preamps of the era, which makes it an all-in-one option for vinyl listeners.
Collectibility & Value
The McIntosh C500 launched with an original MSRP between $12,000 and $18,000, reflecting its modular design and premium positioning. On the secondary market, prices vary widely based on configuration, condition, and tube status. Used units have sold for as low as $1,895 and as high as $10,000, with listings on HifiZero ranging from $5,150 to $5,499. Its collectibility stems from its rarity, its dual-chassis architecture, and the option of tube or solid-state sound in a McIntosh-controlled system. No widespread reliability issues have been documented, though as with any complex vintage electronics, aging capacitors or microprocessor glitches could emerge with time.
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