Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
What are hifi reviews useful for? (1) Identifying products you should demo in person at a dealer. (2) Learning which products reviewers unanimously praise as the best they've heard (this means they probably are legitimately great). (3) Identifying a product's attributes that satisfy your idiosyncratic needs and tastes. Beyond that, we often discount what reviewers say because they heap praise on most products—and are often apprehensive about publishing strong criticism or comparisons between products. Further, they seldom have more than a few products on-hand, often relying on their memories to compare past products. Always listen for yourself.
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Manufacturer details
Features
Specifications
- Matched tubes: 211 x 2 – 6SN7 x 2
- Inputs: 1 line input: rca + xlr
- Signal input: 900 mV for max power
- Outputs: 19W / Channel
- Bias: automatic
- Outputs impedance: 8 ohm
- Frequency range: 14 – 36.000 Hz
- Power Supply: 100/115/230/240 VAC – 50/60Hz
Description
Features Matched tubes: 211 x 2 – 6SN7 x 2 Inputs: 1 line input: rca + xlr Signal input: 900 mV for max power Outputs: 19W / Channel Bias: automatic Connectors: Input connectors high quality Outputs impedance: 8 ohm (other impedance available upon request) Frequency range: 14 – 36.000 Hz Power Supply: 100/115/230/240 VAC – 50/60Hz. Other voltage are available upon request.
Release Timeline
Manufacturer Site
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
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TK One 211-i
- Positioning: The entry-level integrated tube amplifier tailored for affordability and simplicity.
- Description: Built with 211 tubes and ECC82 preamp tubes in a compact, point-to-point construction ideal for small rooms and straightforward setups. Compared to the KT150 or 6550 variants in the TK One line, it represents a more accessible option, and relative to the TK Two series, it offers fewer functionalities and lower power output for budget-conscious buyers.
TK One KT150-i
- Positioning: A mid-range integrated tube amplifier from the heritage classic range.
- Description: Features KT150 power tubes in a single-ended design with point-to-point wiring and a solid wood finish that provides reliable performance. In comparison to the entry-level 211-i, it offers refined audio qualities, while against the more advanced 6550 variant, it represents a balanced choice.
TK One 6550-PSE
- Positioning: A premium integrated amplifier from the heritage classic lineup featuring 6550 technology.
- Description: Uses 6550 power tubes in a handcrafted, point-to-point built design that delivers a distinct tonal character and clarity. When weighed against the KT150-i, it offers upward refinement in sonic detail, yet it remains less complex than the TK Two series for users who prioritize traditional tube warmth with moderate output.
TK Two KT150-PSE
- Positioning: A high-performance integrated tube amplifier in the heritage evolution series.
- Description: Uses four KT150 tubes in a single-ended parallel design with automatic bias, a VU meter, and remote volume control to deliver improved power and control suited for larger rooms. Compared to the TK One models, it provides enhanced functionality and performance, while it remains a step below the flagship 211-PSE in terms of output and manual control options.
TK Two 211-PSE
- Positioning: The flagship integrated tube amplifier in the evolutionary lineup with maximum power output.
- Description: Uses a combination of four 211 tubes and three 6SN7 tubes with a manual bias system featuring precision controls, resulting in groundbreaking sonic authority ideal for larger spaces. Relative to the TK Two KT150-PSE, it offers higher output and detailed manual adjustments, and when compared to the TK One offerings, it delivers more advanced features and increased power for discerning users.
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Avg. Product Price
$500
Used For Sale
6
Available (Scroll Down)
Brand Popularity
393
of 900+
Badges
Top 50 Brand
Top 250 Brand
Products Listed
29
Founding Year
Our take on the brand
Tektron Italia handcrafts visually stunning tube amplifiers in Italy, using both vintage NOS and modern tubes to achieve exceptional audio performance. Their amplifiers are distinguished by their muscular dynamic ability and flexibility to use various power tubes (300B, 2A3, 45), creating an immersive soundstage that makes voices and instruments feel palpably present in the room.
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What if you spend more?
Feliks Audio
ECHO 2
943
943
/
7
Reviews
Feliks Audio is a Polish brand that handcrafts tube amplifiers, including their flagship Envy model which features single-crystal copper wiring and 300B tubes known for their linearity and low distortion. Their amplifiers stand out for their ability to drive both high-impedance dynamic and planar magnetic headphones, which is uncommon among tube amplifiers, while maintaining a low noise floor and delivering natural, warm sound.
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Product Strengths
- Unique and engaging musical experience, even with some hard-to-drive headphones
- Natural, fluid, musical sound with a bit of warmth, superb soundstage, and resolution
- Exceptional detail for the price category and low distortion
- Great build quality and a pleasing aesthetic, being hand-built
- Also works as a preamplifier for stereo setups
Product Considerations
- Not designed for planar magnetic headphones or for low impedance headphones
- May sound brighter, with lower bass quantity and precision, with low impedance headphones
- Tubes are consumables and will burn out after a couple thousand hours of use
- The power switch is located on the back, which some may find inconvenient
Comparisons (according to reviewers)
- Vs SPL Audio Phonitor 2 amp—Echo 2 provides a more refined experience
- Vs Hagerman Tuba—Echo 2 has better driving power and clarity for high impedance headphones
- Vs Audio-gd Master 19—Echo 2 has a more natural tonality and deeper soundstage for high impedance headphones
- Vs Violectric HPA V340—Echo 2 has a more magical musicality and a smoother presentation for high impedance headphones
- Vs Burson Soloist 3X Performance—Echo MKII leans towards a slightly more relaxed sound, while Soloist leans into a more forward aggressive one, and the Soloist has stronger treble extension
Takeaway: The Feliks Audio Echo 2/MKII is a great tube amplifier for those who appreciate engaging and emotionally rich listening sessions, especially with high-impedance dynamic headphones. This hand-built amplifier offers a unique musicality and adds warmth and depth to music.
Video review
Our take on the brand
Feliks Audio is a Polish brand that handcrafts tube amplifiers, including their flagship Envy model which features single-crystal copper wiring and 300B tubes known for their linearity and low distortion. Their amplifiers stand out for their ability to drive both high-impedance dynamic and planar magnetic headphones, which is uncommon among tube amplifiers, while maintaining a low noise floor and delivering natural, warm sound.
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