Something altogether unexpected


2A3 Single-Ended Triode

HiFi Stereo Amplifier

Analog Ethos 2A3 stereo amplifier

Something Tookish may wake up inside you, and you’ll wish to see and hear things you haven’t before, and feel warmth on your face, and power a filament instead of a microchip. Introducing the Analog Ethos Legendarium, a hand-crafted high fidelity single-ended triode (SET) amplifier using the 2A3 vacuum tube. 3.5 watts per channel

A classic 2A3 triode amp

The 2A3 is a directly heated triode and has a long and proven history as a high fidelity audio amplifier tube. Single-ended triode (SET) designs such as this one are found by many to provide the most authentic tube amplification. There are other excellent tubes for SET designs, such as the 300B and the 45, but the affordability and accessibility of the 2A3, combined with its excellent sound characteristics, makes this an outstanding choice for a classic tube amplifier.

At approximately 3.5 watts per channel, you may find the quality of sound and elegance of design to be something entirely unexpected. This is not a high powered amplifier, and efficient speakers (ideally above 90 dB SPL) are recommended for the best sound, though you can certainly use the amplifier with any 8 ohm impedance speakers. (Custom orders may be accepted for other speaker impedances.)

If you are new to tube amplifiers, you may be wondering what you should know about them. Read more in Frequently Asked Questions about owning a tube amplifier.

Performance that matters

Design and part selection are based on what matters most, with an elegant circuit and relatively few components in the signal path.

The Legendarium uses a compound driver stage (SRPP design) using two 12AY7 tubes for low harmonic distortion, and single-ended triode 2A3 output with no global negative feedback. It is tube rectified to be most authentic to original designs. Hum potentiometers are included to optimize each individual tube's AC filament supply to cancel hum, and a large 10H choke is used for filtering a clean power supply for amplification. 

Components have been carefully selected and tested to be high quality, without excessive cost. Transformers are made in USA and Canada, high grade coupling capacitors made in Britain, and reliable new production tubes from JJ, Sovtek or Electro-Harmonix.

Maximum Power Output:  3.5W

Input Sensitivity:  1.4V

THD at 1W:  1%

Output Impedance:  8 ohms

Frequency Response:  25Hz - 20kHz

Hand-crafted, Unmatched

Part of my intended ethos is to provide an amplifier that not only sounds outstanding, but looks beautiful as a showpiece in your home, The chassis and components are custom designed to fit perfectly and look amazing in your listening environment. Meticulous design, authentic hand-crafted construction with aluminum, hardwood and finishes. It is true analog inside and out.

Amplifiers are available either fully assembled, or as a DIY kit for enthusiasts comfortable with soldering and some basic assembly using hand tools. Kits come with extensive instructions, illustrations and a full explanation of the circuit so you truly learn how a tube amplifier works.  

Fully assembled amplifiers are made to order and wired by hand in Malvern, PA using point-to-point technique and personalized care by the designer. Every amplifier passes measurement and listening tests before being shipped to you. 

Whether you choose to build it yourself or order it fully assembled, the Legendarium's individualized, hand-crafted approach allows personalized care, attention to detail and service not possible from mass-produced products. You will feel the love with every song you play! 

Available in Ember Red, Nazgul Black, and Tower Oak finishes.

There is nothing like looking, if you want to find something


Customer from California


If you want to jump right into a direct heated triode set amp and you have little experience with vacuum tube sound, Perry's Legendarium is your ticket to audio bliss. This amp has been pumping out tunes since I got it about a 3 weeks ago, displacing my well burned in Mogwai SE. A good sounding amp doesn't need you to refi your house or get a bank loan. This amp is amazing 3.5w of music bliss.