Nautilus Amplifier
Best flagship tube amplifier for audiophiles seeking premium, handcrafted sound quality.
The Nautilus Amplifier is a flagship integrated tube amplifier from ampsandsound, meticulously handcrafted in the USA. It features a dual-mono layout on a single chassis, with independent power transformers and supplies for each channel, built on the versatile Mogwai circuit. Its classic design incorporates turret boards and point-to-point wiring. Reviewers praise its engaging components and superior sound quality, enhanced by custom-wound output transformers for excellent frequency extension. The Rev 2 model offers an updated power supply and tube cage for the quietest performance yet.
$11000.00
Owner Satisfaction
4.7
/ 5
Category Rank
325
/ 1719
#325 in Power Amplifiers
Price vs Category Average
+33%
Above average
Max Power @ 8ohm
8
/ watts RMS
Who it's for
- Collectors valuing heirloom-quality craftsmanship and long-term durability
- Audiophiles seeking rich, immersive, and highly detailed sonic textures
- Headphone enthusiasts powering demanding planar or low-sensitivity gear
Who should skip it
- Budget-conscious listeners prioritizing value over high-end luxury performance
- Users preferring low-maintenance, cool-running solid-state equipment
- Desktop users with limited workspace or minimalist setups
Performance breakdown
Channel Separation
Dual-mono architecture delivers an expansive and precise stereo soundstage.
Build Integrity
Point-to-point wiring and turret boards ensure heirloom-grade durability.
Frequency Extension
Custom-wound transformers provide remarkable clarity across the entire audible spectrum.
Noise Floor
The Rev 2 power supply achieves near-silent operation for tube amplification.
Impedance Versatility
Five output options accommodate a wide range of high-end speaker loads.
Headphone Performance
Dedicated output provides a rich, immersive experience for critical listening sessions.
Key Specs
Max Power @ 8ohm
8 watts RMS
Bandwidth
10Hz to 32kHz @ 1 watt -1dB
Total Harmonic Distortion
1.22% at 1 Watt
Weight
70 lbs
Dimensions
14" deep x 18" wide x 8" tall
Amplifier Class
Class A, Tube
Power Supply
Gen 5 power supply (for Rev 2)
Output Power
5W-30W Into 8ohms range
Features
- Dual-mono layout for superior channel separation
- Custom-wound output transformers for exceptional sound
- Handcrafted in the USA with classic aesthetics
- Five outputs with different impedances
- Engaging audio components for natural sound
- Quietest Nautilus iteration to date (Rev 2)
- Built on the versatile Mogwai circuit
- Dedicated headphone output
What customers say
The Nautilus Amplifier earns high praise for its exceptional build quality and outstanding sonic performance. Owners consistently highlight its robust, heirloom worthy construction. Sonically, the amplifier delivers powerful dynamics and authoritative bass, a significant feat for tube designs. Its versatility is a key strength, effortlessly driving both demanding planar magnetic headphones and various loudspeakers with a musical, detailed, and nonfatiguing sound. While a premium investment, the consensus is that the Nautilus offers commensurate value through its reliable performance and long term enjoyment. Direct builder interaction further elevates the ownership experience.
Know before you buy
The dual-mono layout uses independent power transformers and supplies for each channel. This configuration significantly improves channel separation, resulting in a wider, more precise soundstage and reduced crosstalk between the left and right speakers.
Yes, the Nautilus features a dedicated headphone output alongside its speaker outputs. It is designed to drive a wide range of headphones with the same tube-driven warmth and clarity as your main speaker setup.
The Rev 2 model incorporates the Gen 5 power supply, which is specifically engineered to minimize noise floor. This makes it the quietest Nautilus iteration to date, ensuring that subtle musical details are not masked by background hum.
The five outputs allow you to match the amplifier's impedance to your specific speakers, ensuring optimal power transfer and frequency response. This versatility ensures the amplifier performs consistently across a variety of speaker loads.
The Mogwai circuit is known for its engaging, natural, and musical presentation. When paired with custom-wound output transformers, it delivers excellent frequency extension and a rich, tube-driven character that remains balanced and detailed.
While it is built with a desktop form factor, please note that the Nautilus weighs 70 lbs and measures 14 by 18 inches. You will need a sturdy, spacious surface to accommodate its size and weight safely.
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$11000