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Elemental Amps - Watson - Valve Headphone Amplifier - Pure Class A Single Ended Triode/Mosfet Hybrid Headphone Amplifier (Ships In 3-4 Weeks)

Elemental Amps

  • R 3,990.00
  • Save R 700

Product Overview

MSRP 259 Euro


 Elemental Watson

Class-A Valve/Mosfet Hybrid Headphone Amplifier


 Full Class-A amplification at all stages

 Dual mono design for best channel separation and stereo

 Quiet operation during power on/off and low residue noise

 NOS 6AK5 military grade tubes for longer stable lifespan

 Extended bandwidth meeting Hi-Res standard

 Optional pre-amplifier output with dedicated terminals

 High performance at entry level price

The amplifier sets a new standard on cost/performance ratio

Elemental Amps is proudly to present the Elemental Sigma, a class-A valve/Mosfet

hybrid headphone amplifier. Targeting entry-level price and high-end performance,

Elemental Sigma is a unique product. Just close eyes and hooking up favorite

headphones, you will be surprised by what you have heard. A powerful and delicate

sound accompanied by the warmth of valve, a wonderful combo.

Dual mono construction in a compact chassis

By trimming down unnecessary luxury and focusing on core competence, we are

able to build Elemental Sigma in a dual mono configuration, a highly touted feature

in high-end gear.

Two military NOS 6AK5 tubes are the center piece of each

channel’s gain stage.

They deliver rich harmonics, which are the charm of single-

ended topology drawing countless audiophiles’ addiction.

Followed by class-A power MOSFET output stage, it provides almost limitless driving current while preserving the tube’s charming signature.

The configuration also guarantees best channel separation (stereo image), easy maintenance and adjustment on individual channel.

Thoughtful design through smart simplicity

First, there is no pop noise during power on and off. You no longer have to worry the pulse

energy may cause damage to precious headphones.

Secondly, the volume adjustment is adapted to logarithmic curve, the most natural to human interface and hearing by integrating the gain of amp and linear potentiometers.

The Heart of Sigma, 6AK5 military NOS valve

Developed by Bell Labs / Western Electric and used extensively as an I.F. amplifier in 
WWII radar systems, 6AK5 yields excellent high-frequency performance. On the other 
hand, a poorly designed 6AK5 tends to be unstable.

We carefully characterize 6AK5 to be audio amplifier that delivers transparent and airy atmosphere rare to find in peer products.

Another advantage is easy to find equivalent replacement at reasonable price for tube rolling.


Frequency Response 10 Hz – 100 kHz (-3dB)

Output power 250 mW + 250 mW (300 ohm)

2000 mW + 2000 mW (30 ohm)

Headphone impedance 30 ohm – 600 ohm

Power supply 26V/0.8A DC adaptor

Dimensions mm

Net weight gram

  • Full Class-A Amplification
  • Dual Mono Design
  • 2W+2W (30 ohm) output customer
  • Wide Bandwidth for Hi-Res Music
  • 6AK5 military grade vacuum tubes


Class A Valve/MOSFET hybrid tube desktop headphone amplifier

Supports 30- 600 Ohm impedance headphones.

Dual Mono Contruction

Delivers rish harmonics in single-ended topology.

Western Electric Triodes

Uses two Bell Lab/Western Electric 6AK5 valve tubes yields and produces excellent high-frequency performance.

Smart Power Deisgn

Eliminates any 'Pop' sound when switching power on/off. Thus, no concern for pulse energy damage to your headphones.

Compact and light-weight

Easy handling size and small footprint. Portable.

Watson 6AK5 Tube Amplifier
Watson 6AK5 Tube Amplifier 
Watson 6AK5 Tube Amplifier


Product Specs

Description Specifications
Frequency Response:  10Hz to 100kHz(-3dB)
Output Power (≤30Ω, Single-Ended):  2,000 mW
Output Voltage (600Ω, Single-Ended):  250 mW
Input Voltage (Pro iCAN):  DC 26V/0.8A
Power Consumption:  ≤ 22W idle, 50W max.
Dimensions:  140 (l) x 90 (w) x 130 (h) mm
Weight:  320 grams

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