iBasso
iBasso AMP13 Nutube 3.5mm Module
Best tube-inspired upgrade for dedicated high-resolution portable audio enthusiasts.
Experience the unique and attractive sound of vacuum tubes with the iBasso AMP13 Nutube module. This open-box item, compatible with DX320 and DX300 players, features KORG's 6th generation Nutube for rich, characteristic nuances. It offers dual 3.5mm single-ended outputs: a low-noise tube output (2.5Vrms) for a stronger tube signature and a maximized output (4.1Vrms) for higher driving capability. The three-channel amplification design, utilizing the OPA1622, significantly reduces noise and enhances dynamics. Powered by dedicated batteries and Linear Technology DC-DC chips, this module ensures optimal performance and comes with a 1-year limited warranty.
$242.10
More AMP Options
Owner Satisfaction
4.6
/ 5
Category Rank
268
/ 807
#268 in Headphone Amplifiers
Price vs Category Average
-83%
Below average
Compatibility
320300
/ DX/DX
Who it's for
- Listeners desiring an expansive, immersive, and highly detailed soundstage
- iBasso DAP owners wanting flexible, modular sound customization options
- Audiophiles seeking a rich, organic, and vintage-inspired listening experience
Who should skip it
- Users looking for a universal amplifier for multiple audio devices
- Owners of highly sensitive headphones sensitive to background noise
- Travelers prioritizing maximum battery life and cool-running portable gear
Performance breakdown
Harmonic richness
KORG Nutube technology delivers authentic, lush vacuum tube warmth and character.
Driving power
The 4.1Vrms maximized output handles demanding headphones with impressive authority.
Noise floor
Advanced three-channel design keeps background hiss remarkably low for tube amplification.
Output versatility
Dual 3.5mm options provide distinct sonic flavors for different listening preferences.
System integration
Seamlessly transforms the DX300 and DX320 into high-end tube-driven audio players.
Component precision
Hand-matched parts ensure consistent, high-fidelity performance across every unit.
Key Specs
Compatibility
DX320/DX300
KORG Nutube 6th generation
Output
3.5mm + 3.5mm single-ended
Low Noise Tube Output
2.5 Vrms
Maximized Output
4.1 Vrms
Amplifier Technology
Vacuum Tube
Power Source
Dedicated battery + dual Linear Technology DC-DC chips
Output Interface Type
3.5mm Jack, 3.5mm Jack
Features
- Unique vacuum tube sound signature from KORG Nutube
- Dual 3.5mm outputs for versatile listening options
- Low-noise tube output for detailed sound
- Maximized output for higher driving power
- Advanced three-channel amplification for reduced noise and improved dynamics
- Dedicated battery power for optimal performance
- Hand-matched components for optimal Nutube performance
- Open box item with full warranty
What customers say
Customers consistently praise the iBasso AMP13 Nutube 3.5mm Module for its exceptional sound quality, particularly its warm and natural tube like presentation. Many users highlight the significant upgrade it brings to their audio experience, noting improved soundstage and musicality. The module is highly regarded for delivering a distinct sonic character that enriches listening sessions, making it a worthwhile investment for audiophiles seeking that specific analog warmth. Its ability to transform the sound profile is a recurring positive theme, reinforcing its perceived value.
Know before you buy
The AMP13 module is specifically designed for use with the iBasso DX320 and DX300 digital audio players.
The module features a low-noise tube output (2.5Vrms) designed for a more pronounced tube signature, and a maximized output (4.1Vrms) that provides higher voltage for driving more demanding headphones.
The 6th generation Nutube provides the warm, rich harmonic nuances characteristic of vacuum tubes, offering a more organic and textured sound profile than traditional solid-state amplification.
No, the module utilizes its own dedicated battery power and dual Linear Technology DC-DC chips to ensure the tube circuitry receives clean, stable power without interference from the main player components.
By utilizing the OPA1622 in a three-channel configuration, the design effectively separates the signal and shield ground, which significantly lowers the noise floor and improves overall dynamic range.
An open-box item is a product that has been returned or had its packaging opened, but it remains in excellent condition. This unit is fully inspected and includes the standard 1-year limited warranty.
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$242