McIntosh
McIntosh MC3500 Mk II
Best iconic power for uncompromising audio enthusiasts.
The McIntosh MC3500 Mk II 1-Channel Vacuum Tube Amplifier is a powerful 350 Watt monoblock, inspired by the legendary 1968-71 MC3500 that powered Woodstock. It features eight EL509S output tubes, Power Guard Screen Grid Sensor™ technology to prevent premature tube failure, and Sentry Monitor™ for over-current protection. This amplifier delivers exceptional audio performance, faithfully adhering to the original design while incorporating modern advancements. It offers both balanced and unbalanced inputs and outputs, and a large, centered output meter that also indicates amplifier warmup time. The front panel is crafted from machined aluminum with a bead blast finish and gold anodizing, embodying McIntosh's commitment to performance and reliability.
$17500.00
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Owner Satisfaction
4.8
/ 5
Category Rank
38
/ 2552
#38 in Power Amplifiers
Price vs Category Average
+112%
Above average
Power Output per Channel
350248
/ W @ , or Ohms
Who it's for
- Audiophiles with demanding speakers or expansive listening environments
- Collectors and enthusiasts valuing audio history and striking visual presence
- Discerning listeners prioritizing a powerful, refined, and engaging sonic experience
Who should skip it
- Budget-conscious buyers or those seeking practical value for money
- Apartment dwellers or users with limited space and physical strength
- Environmentally conscious users or those in warm climates
Performance breakdown
Power Delivery
Massive 350-watt output drives even the most demanding high-end speakers effortlessly.
Build Integrity
Industrial-grade construction with premium materials ensures a lifetime of reliable performance.
Sonic Fidelity
Vacuum tube circuitry delivers a warm, rich, and incredibly detailed soundstage.
Tube Protection
Advanced monitoring systems actively prevent component failure during high-intensity listening sessions.
Visual Presence
Iconic aesthetic design commands attention in any high-end audio listening room.
Connectivity Versatility
Flexible balanced and unbalanced inputs accommodate a wide range of source components.
Key Specs
Power Output per Channel
350W @ 2, 4 or 8 Ohms
Number of Channels
1
Total Harmonic Distortion
0.3% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz
S/N below rated output
120dB
Dynamic Headroom
2.4dB
Damping Factor
>25 Wideband
Rated Power Band
20Hz to 20kHz
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
Features
- Inspired by Woodstock amplifier
- 350 Watt Monoblock Power
- Eight EL509S Output Tubes
- Power Guard SGS Technology
- Sentry Monitor Over-Current Protection
- Unity Coupled Output Transformer
- DualView Power Output Meter
- Solid Cinch Speaker Binding Posts
What customers say
Customers consistently praise the McIntosh MC3500 Mk II for its exceptional build quality and iconic design. Owners frequently highlight the amplifier's robust construction and the meticulous attention to detail evident in its aesthetics. The sound reproduction is often described as powerful, clear, and immersive, delivering an unparalleled listening experience. While a significant investment, the perceived value stems from its enduring performance and the prestige associated with the brand's heritage. This amplifier is seen as a statement piece, offering both sonic excellence and visual grandeur for serious audiophiles.
Know before you buy
As a monoblock, the MC3500 Mk II is a single-channel amplifier designed to power one speaker. To achieve a stereo setup, you will need to purchase two units, which allows for complete channel separation and dedicated power delivery to each speaker.
While it uses eight EL509S vacuum tubes, the amplifier includes modern safety features like Power Guard SGS and Sentry Monitor to protect against tube failure and over-current issues. You should ensure the unit has adequate ventilation space, as tube amplifiers naturally generate heat during operation.
The MC3500 Mk II is designed to deliver 350 Watts into 2, 4, or 8 Ohm loads, making it compatible with a wide range of speakers. Its Unity Coupled Output Transformer ensures that you receive the full rated power regardless of the speaker's impedance.
Power Guard Screen Grid Sensor (SGS) technology monitors the vacuum tubes in real-time. If a tube begins to fail, the system automatically adjusts the amplifier's operation to prevent damage, ensuring the longevity of your tubes and the amplifier itself.
The DualView Power Output Meter provides a visual representation of the amplifier's power output. It also functions as a status indicator, showing the amplifier's warmup time when you first power it on.
Yes, the unit weighs 121 lbs (54.9 kg). You should ensure your audio rack or shelf is rated to support this weight and has sufficient depth, as the amplifier measures over 21 inches deep.
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$17500