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Portable Vacuum Tube Headphones Amplifier- Portable Audio Amplifier

Portable Vacuum Tube Headphones Amplifier- Portable Audio Amplifier

Model No.: A331A

  The A331A from Schrödinger Audio is a High Performance, Portable Vacuum Tube Headphones Amplifier, is a bridge to enhance sound quality between the portable music device such as Smartphone and Headphones, allow user to listen Hi-Fi quality music in the portable and convenience way!

  Schrödinger Audio is OEM & ODM Manufacturer for Portable Vacuum Tube Amplifiers.

Portable Vacuum Tube Headphones Amplifier


   Aluminum Housing with portable size (70x110x20mm). CNC Cutting Technology with sand blasting oxidative black color. Transparence Windows on the top which can see Vacuum Tubes inside the amplifier.

   Allow users to enjoy Vacuum Tube Sound on the Portable Way. Outputs the Audiophile Level sound performance by applying Audiophile Standard circuit design, specifications and materials such as Raytheon Vacuum Tubes, ELNA and NCC Capacitors*.

   Mini Dimensions and Light Weight Convenience Design which can fit and fix with many Portable Audio Player Device such as Smartphone. Gear Style Volume Control let user convenience to put the amplifier into the pocket.

  Common Micro USB 5V battery charging Port with 1,100mAh, high capacity rechargeable Lithium Battery inside to support 10hrs continuous operation. Ideal for Travelling.

  The accessories include the Rubber Bands to fix Portable Audio Player and Gold Plated 6.35mm to 3.5mm Stereo Audio Jack Convector to fit various Headphones Plug Specifications. 

High Precision CNC Cutting Aluminum Housing with Vacuum Tubes Inside.

Portable Hifi Amplifier

Portable Audio, Pocket Size:

Portable Audio Device

Front and Back Panel:

Vacuum Tube Headphones Amp

Connection for Portable Vacuum Tube Headphones Amplifier:

Ratheon Vacuum Tubes

Using the High Quality Audiophile Standard materials such as Raytheon Vacuum Tubes, ELNA and NCC Capacitors*. 1,100mAh, high capacity rechargeable Lithium Battery: 

Ratheon Vacuum Tube

  • Tube: Raytheon JAN6418 Mini Tubes x 2            
  • Frequency Response:10-33KHz            
  • Signal to Noise Ratio:120dB            
  • Output power : 250mW(32Ω)            
  • Total Harmonic Distortion:<0.004%    
  • Battery: 3.7V, 1100mAh rechargeable Lithium Battery            
  • Battery Charging Time: Around 3hrs
  • Battery Working Hour: 10hrs (Max)         
  • ​​Charging Port: Micro USB, 5V            
  • Input Port: 3.5mm Stereo Jack            
  • Output Port: 6.35mm Stereo Jack            
  • Headphone Impedance: Suitable for 8-300Ω Headphones            
  • Colour : Black (Other Color orders are also welcome)            
  • Dimensions : 110×70×20mm            
  • Net Weight: 0.2kg    


* Ratheon is the trade mark of Ratheon Company
* ELNA is the trade mark of ELNA America Inc.
* NCC is the trade mark of Nippon Chemi-Con Corporation 


Products:Vacuum Tube Amplifier