Nautilus XL SE
Best tube amplifier for audiophiles seeking intimate, high-fidelity speaker and headphone listening.
The Nautilus XL SE is a dual-mono tube integrated amplifier, representing the second evolution of a beloved platform. It boasts an exceptionally low noise floor and extended frequency response, delivering effortless power and deep bass. This amplifier retains the classic American sound with a warm midrange, offering an intimate and present listening experience. Built with a robust 12-gauge steel chassis and point-to-point wiring, it embodies a commitment to quality and longevity. It provides flexible system matching for a wide range of headphones and speakers.
$18000.00
Owner Satisfaction
4.5
/ 5
Category Rank
1163
/ 1719
#1163 in Power Amplifiers
Price vs Category Average
+118%
Above average
Weight
74106
/ lbs ( lbs shipped)
Who it's for
- Audiophiles seeking natural, warm, and immersive sonic textures
- Collectors valuing heirloom-quality construction and timeless design
- Headphone enthusiasts requiring power for diverse, demanding gear
Who should skip it
- Budget-conscious listeners seeking entry-level audio solutions
- Users preferring low-maintenance, cool-running solid-state equipment
- Listeners wanting plug-and-play compatibility with all audio setups
Performance breakdown
Build Integrity
Heavy-duty steel chassis and point-to-point wiring ensure a lifetime of performance.
Sonic Character
Delivers a rich, intimate midrange signature synonymous with classic tube amplification.
System Versatility
Seamlessly transitions between high-impedance headphones and efficient speaker setups.
Noise Floor
Custom-wound transformers maintain impressive silence even with sensitive audio gear.
Volume Precision
The 24-step stepped attenuator offers tactile, perfectly balanced level adjustments.
Signal Purity
Zero feedback Class A design prioritizes musical transparency over raw power.
Key Specs
Weight
74 lbs (106 lbs shipped)
Dimensions
13” deep, 19” wide and 8” tall
Max Power @ 8ohm
8 watts RMS with KT88s and 5AR4s
Max Power @ 32ohm
5 watts RMS
Max Power @ 100ohm
6 watts RMS
Max Power @ 300ohm
6 watts RMS
Bandwidth
18 Hz to 20 kHz -3 dB
Noise
90uv RMS
Features
- Dual-mono design in a single chassis for independent channel performance.
- Custom-wound transformers for extended frequency response and reduced noise floor.
- Zero feedback, single-ended Class A operation for pure SET sound.
- Turret board construction with true point-to-point wiring for classic amplifier tradition.
- Dedicated transformer taps for system matching across a wide range of headphones.
- Switchable between headphone and speaker outputs via a rear panel toggle.
- Jupiter copper foil in wax coupling caps for revealing fine detail.
- 24-step stepped attenuator for precise volume control and channel balance.
What customers say
Customers consistently praise the Nautilus XL SE by ampsandsound for its exceptional sound quality, describing it as rich, detailed, and immersive. Many highlight the amplifier's robust build quality, noting its premium components and solid construction. Users appreciate the refined audio experience it delivers, making it a standout choice for discerning listeners seeking top tier performance and lasting craftsmanship. The overall sentiment reflects high satisfaction with both its sonic capabilities and its durable design.
Know before you buy
Yes, the amplifier features a rear-panel toggle switch that allows you to easily switch between headphone and speaker outputs, making it a versatile centerpiece for a dual-purpose system.
The Nautilus XL SE delivers a classic American tube sound characterized by a warm, intimate midrange and a present, engaging presentation. Its zero-feedback, single-ended Class A design prioritizes harmonic richness and musicality over clinical precision.
By utilizing a dual-mono architecture within a single chassis, the amplifier ensures that each channel operates independently. This minimizes crosstalk and interference, resulting in a lower noise floor and improved stereo imaging.
Yes, it is designed for excellent system matching. With dedicated transformer taps, it provides consistent power delivery across a wide range of headphone impedances, including 32, 100, and 300 ohms.
This traditional construction method is chosen for its durability and ease of serviceability. By avoiding printed circuit boards, the design ensures a robust signal path that contributes to the amplifier's longevity and classic sonic character.
The Nautilus XL SE features a 24-step stepped attenuator. This provides highly precise volume adjustments and ensures perfect channel balance, which is particularly important when listening at lower volumes.
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$18000