iBasso AMP9 Nutube Vacuum Tubes Module

The iBasso AMP9 is an amplification module compatible with the DAP DX150, DX200 and DX220

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The iBasso AMP9 is an amplification module compatible with the DAP DX150, DX200 and DX220, integrating a tube amplification circuit and a very high-quality circuit for exceptional sound reproduction. The module simply attaches to the bottom of one of these iBasso players for improved performance.

A tube amplifier module for a unique sound

Based on the sixth generation of Nutube tubes, manufactured by Korg, the AMP9 provides high-performance voltage amplification to provide a unique sound reproduction. The buffer stage allows buffering using up to +/-200mA of linear output current. The amplifier thus has a high current which makes it possible to combine it with headphones or headphones with low impedances, while maintaining the unique sound quality of the tubes.

Advanced architecture

1. Nutube tubes are powered by a dedicated high-performance DC-DC chip designed by Linear Technology / Analog Devices. This chip has two DC-DC circuits on board: the first one supplies 1V for the cathode, the second one supplies a very high voltage for the anode.

2. The signal grounding and shielding of this ground are separated in order to drastically limit interference and noise.

3. Adding negative feedback to the amplification circuit reduces distortion while broadening the frequency response range.

4. A dedicated volume control integrated into the AMP9 allows the noise threshold to be lowered, especially at low volumes.

An intelligent design designed for exceptional reproduction

The iBasso AMP9 uses Susumu Metal Film Resistors, Gold Plated Custom Inductors, ROHM and Panasonic Tantalum Polymer Capacitors to reduce power resistance and improve dynamics and quality of reproduction. A custom-made Silicone shock absorber for the Nutube tube reduces microphonic effects.

A perfectly calibrated amplifier

Each AMP9 module is tested, measured and calibrated using the AP Audio Analyzer solution, with 3 multi-turn potentiometers. The 3 potentiometers are manually calibrated by iBasso engineers to allow Nutube tubes to offer maximum performance. After 20 test versions and numerous optimizations, the AMP9 is able to deliver a sound that is precise, smooth and lively and the association with an iBasso player allows you to get the most out of it.

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