Icon Audio
Icon Audio Stereo 40 MkIV Plus Integrated Amplifier
Best premium component for discerning audiophiles seeking rich, detailed sound.
Experience unparalleled audio fidelity with the Icon Audio Stereo 40 MkIV Plus Integrated Amplifier. This premium all-tube amplifier delivers exceptional warmth and detail, offering two distinct sonic profiles with switchable Ultralinear and Triode modes. The 'Plus' model enhances performance with upgraded components and premium tubes. Its hand-wired construction, choke-regulated power supply, and user-friendly bias meter ensure a quiet, musical, and immersive listening experience. Perfect for audiophiles seeking a refined and emotionally engaging connection to their music.
$4350.00
More Stereo 40 Options
Owner Satisfaction
4.7
/ 5
Category Rank
551
/ 2553
#551 in Power Amplifiers
Price vs Category Average
-47%
Below average
Who it's for
- Audiophiles seeking a classic, immersive, and emotionally resonant listening experience
- Discerning buyers who appreciate artisanal craftsmanship and vintage-inspired design
- Enthusiasts eager to fine-tune their sound and explore different tonal characteristics
Who should skip it
- Budget-conscious audiophiles or those new to premium high-fidelity equipment
- Users preferring a low-maintenance, cool-running, and "set-and-forget" audio setup
- Individuals with limited space or those prioritizing compact, lightweight audio components
Performance breakdown
Sonic Versatility
Switchable Triode and Ultralinear modes offer two distinct, high-fidelity sound profiles.
Build Integrity
Hand-wired point-to-point construction ensures exceptional durability and signal purity.
Maintenance Simplicity
The integrated bias meter makes routine tube adjustments straightforward and stress-free.
Signal Clarity
Choke-regulated power supply delivers a remarkably quiet, noise-free listening experience.
Component Quality
Premium internal components and gold-plated terminals prioritize signal integrity throughout.
Speaker Compatibility
Flexible output taps accommodate a wide range of 4, 8, and 16-ohm speakers.
Key Specs
All hand wired point to point, no printed circuit board
Class A, all Triode front end
Signal to noise level
-90db
Frequency response
better than 20Hz-20kHz +0 – 1db
Power bandwidth
30Hz-30kHz -3 dB
Total harmonic distortion
0.2% at full output
Suitable for 4, 8, and 16ohm loudspeakers
Silver plated copper PTFE audio cable
Features
- Switchable Ultralinear and Triode modes for versatile sound
- Upgraded premium components for enhanced clarity
- Easy Bias meter for simple tube adjustment
- Quiet operation with choke-regulated power supply
- Hand-wired point-to-point construction
- Integrated headphone socket for private listening
- Includes a convenient remote control
- High-quality input and speaker terminals
What customers say
Customers consistently praise the exceptional sound quality, describing a rich, warm, and detailed audio experience that brings music to life. Many highlight the amplifier's robust build and elegant design, reflecting superior craftsmanship. Owners frequently express deep satisfaction with its ability to deliver an immersive and engaging listening journey, often noting its significant upgrade over previous systems. The overall consensus points to a highly refined product that truly elevates the audio experience.
Know before you buy
The Ultralinear mode offers higher power output and a punchier, more dynamic sound, while the Triode mode provides a more relaxed, intimate, and harmonically rich presentation. You can switch between these modes to best suit your music genre or personal listening preference.
Yes, but it is designed to be straightforward. The amplifier features a built-in bias meter that allows you to easily monitor and adjust the tube bias, ensuring your tubes are operating at peak performance without needing complex external equipment.
The Stereo 40 MkIV Plus is highly versatile and includes dedicated terminals for 4, 8, and 16-ohm loudspeakers. This ensures compatibility with a wide range of speaker impedances, allowing for optimal power delivery and performance.
Yes, the integrated headphone socket is designed to take advantage of the amplifier's tube circuitry, providing a warm and detailed listening experience for private sessions. It is a convenient feature for those who want to enjoy the tube sound without using their main speakers.
By avoiding printed circuit boards, the hand-wired construction makes the amplifier more robust and significantly easier to service or repair over time. This traditional method is favored by audiophiles for its durability and the cleaner signal path it provides.
The unit measures 39cm wide, 41cm deep, and 23cm high, and weighs 23kg. Because it is a tube amplifier, ensure you place it on a sturdy surface with adequate ventilation space above and around the unit to allow heat to dissipate properly.
Still have a question?
Ask Hayley anything about this product before you decide.