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6L6 Vacuum Tube Amplifier

Compact Vacuum Tube Audio Amplifier with Bluetooth Connection


Model No. Red Thunder L6   Copmact amplifier

Vacuum Tube Audio Amplifier

    Schrödinger Audio’s Red Thunder L6 is a compact Bluetooth vacuum tube HiFi audio system with two additional inputs for connecting CD/DVD player, tuner or phono preamplifier. Red Thunder L6 features two highly efficient 6L6 vacuum tubes, which are commonly found in guitar amplifiers. Red Thunder L6 can drive speakers with sensitivities as low as 85dB.

    Red Thunder L6 uses a Class-A Single Ended design to reduce distortion. The unique DC to DC high frequency power switching inverter replaces the tradition heavy and cumbersome power transformer, which regulates the vacuum tube operating voltage and, eliminates the constant low-pitched hum, which is caused by most power transformer circuits.

Home Audio


   Red Thunder L6 is powered by two 6L6 high performance vacuum tubes and two 12AU7 low noise preamplification vacuum tubes. The 12AU7 forms a SRPP (shut regulated push pull) to allow Red Thunder L6 to produce crisp sound with a diverse range of harmonics. The super low noise feature produces crystal-clear audio that every audiophile will enjoy.

6L6 Tube

  The Bluetooth connectivity allows you to pair Red Thunder L6 with your smartphone, tablet or, computer so you can stream music remotely. 

Bluetooth audio amplifier

    A 3.5mm audio jack mounted in the front allows you to plug in your headphones to listen to your music in quiet environments with the benefits of a full amplifier. The audio jack works well with most low impedance headphones.

headphones amplifier

    The amplifier may also be covered with an optional metal mesh to prevent accidental contact. The front plate and chassis is built from scratch resistant anodized aluminium. Red Thunder L6 is also designed to be compact measuring at W24.0cm x H15.0cm x L19.0cm1.


    Red Thunder L6 works with any Schrödinger Audio Speakers such as our Songbird speakers and the speakers from the Nightingale P1 audio systemClick here

audio speaker


  Red Thunder L6 is compatible with other Schrödinger Products. Click here

audio system

    We provide a 12-month limited warranty for Red Thunder L6.


  • Audio Tubes: 6L6x2,12AU7x2
  • Output Power: 5W + 5W (8Ω) RMS Output
  • Frequency Response: 20Hz ~ 20kHz (-2dB)
  • THD: <1% (1kHz)
  • Signal-to-Noise Ratio: 80dB
  • Input Sensitivity: 0.775V (0dB)
  • Input Impedance: 470KΩ  
  • Load Impedance: 8Ω (typ)
  • Headphones Output Power (THD<=10%): 0.4W
  • Power Supply: AC-DC 12V, 12A Power Adaptor
  • Sound Input: AUX x2, Bluetooth Wireless
  • Sound Output: Speakers, 3.5mm Headphones
  • Bluetooth Transfer Distance: 10m (Max)
  • Dimensions (mm): W240 x H165 x L2221


1 Dimensions before installation of Bluetooth Antenna.

2 Information above subject to change, errors & omissions excepted.


Products:Vacuum Tube Amplifier

Compact Vacuum Tube Audio Amplifier with Bluetooth Connection