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.
All
TK Two 300B-i
reviews
Manufacturer details
- Matched tubes: 300B x 2 – 6SN7 x 2 – 5AR4 x 1
- Inputs: 3 line inputs
- Signal input: 400 mV for max power
- Outputs: 7 W / Channel
- Outputs impedance: 4 – 8 ohm
- Frequency range: 15 – 35.000 Hz
- Power Supply: 100/115/230/240 VAC – 50/60Hz
- Dimensions: 42 x 28 x 18 cm
- Weight: 16Kg
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:
Select products
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.
Our take on the brand
Look inside the brand
Our interview with the brand
What are two key technological innovations or strong opinions that differ you from other brands?
What's your approach to customer support?
What are your favorite tracks for showcasing the strength of your products?
What other products pair best with yours?
Used
Tektron
What if you spend more?
Features Matched tubes: 2A3 x 2/4 (OR 45 x 2/4, OR 50 x 2/4, OR 300B x 2/4) – 6SN7 x 2 – 5V4 x 2 – 6X5 x 1 Inputs: 3 line inputs Signal input: 400 mV for max power Outputs: 1.6W / Channel with one 45 — 3.6W / Channel with two 45 3.5W / Channel with one 2A3 — 7W/ Channel with two 2A3 5W / Channel with one 50 — 10W with two 50 7W / Channel with one 300B — 14W / Channel with two 300B 9W with one 300B XLS / Channel — 18W / Channel with two 300B XLS Outputs impedance: 4 – 8 ohm (other impedance available upon request) Frequency range: 15 – 35.000 Hz Power Supply: 100/115/230/240 VAC – 50/60Hz. Other voltage are available upon request
.svg)
Product Strengths
- A variety of tubes can be used (45, 2A3, PX4, PX25, 300B, or 300B XLS) to produce different power outputs (1.5 to 22wpc)
- It can operate in single-ended (SE) or parallel single-ended (parallel SE) mode
- It is very adaptable—allowing for changes to input tubes and 5AR4 rectifiers to alter the amp's sound
- Built-in bias meters and pots allow for re-biasing when changing tubes
Product Considerations
- The right speaker load (high output impedance) is needed to perform optimally
- Single-ended amps shun negative feedback, which would lower their output resistance
- Speakers not well-suited for high output impedance amps may experience premature bass roll-off and a rising presence response
Takeaway: The TK2A3/300PSES-i Ref amplifier offers a lot of flexibility for tube rolling and sound customization. It is well-suited for high-efficiency speakers.
Video review
Our take on the brand
The SE300B Mono Amplifier is... an all-tube power amplifier employing the famous classic 300B filamentary triode in single-ended operation mode for an output of up to 10 watts into a 4, 8 or 16 ohm loudspeaker load. The 300B power tube is excited by an extraordinary single-stage driver employing two CV2382/EL822 power pentodes operated in triode mode with high idle current and works into a C-core output transformer built in-house to the highest possible standards so as to ensure ultimate performance. The amplifier is built with meticulous hand construction using our proven point-to-point wiring techniques whereas much care has been taken in arranging each aspect of the internal construction to ensure low noise performance, ease of service and the highest reliability for many years to come.
Our summary
Product Strengths
- Pure sound, free of coloration while retaining musical detail, allows a graceful and effortless listening experience
- Natural and tangible sound due to accurate reproduction of details, creates a believable presentation
- Solid and controlled bass performance, unusual for a 300B single-ended triode amplifier
- Excellent sense of touch and tactile sound, making instruments like plucked strings and bowed violins sound very convincing
- Wide and deep soundstage with good 'air', providing a transparent and 'hear-through' sound, especially with complex music
Product Considerations
- Careful matching with partnering equipment is required, especially speakers with high efficiency
- Relatively low overall gain requires a source with a high output voltage
- Output transformer links need to be correctly set for speaker impedance, requiring dealer assistance
- Some reviewers found the top end sounding a bit rolled off before use of appropriate high efficiency speakers and source gain settings
- Changing the EL803S driver valves requires carefully matched pairs supplied by Thöress
Comparisons (according to reviewers)
- Vs Shindo Haut-Brion/Corton-Charlemagne, Thöress has more treble extension and transparency, Shindo has better upper-bass/lower-midrange substance and body—and more drive
Takeaway: The Thöress SE-300B offers a supremely musical and detailed listening experience with a focus on accuracy and sonic purity. When paired with the right speakers, this amplifier could be an excellent choice to bring out the best in music.
Video review
Our take on the brand
One of the finest parallel single ended 300B tube amplifier made by Fezz Audio. It provides openness and spatial sound. Powerful, sublime, very involving and uniqe to itself. Fezz Audio Lybra gives you the best sounding experience you can get from the 300B tubes.
Our summary
Product Strengths
- Delivers an incredibly rich, flavorful midrange and a sweet, relaxed treble
- Has a more sophisticated presentation than the utilitarian bent-metal chassis sported by most integrated tube amps on the market, and the smooth lines of the chassis help the amp stand out from the crowd
- Has a clever tube cage design with a clear Plexiglass front panel that delivers an unobstructed view of the tubes and is easy to install and remove
- Is seriously quiet, and there was effectively zero noise through any of the speakers
Product Considerations
- Can sound wildly different, depending on the impedance of the speakers
- The four slightly squishy feet underneath the amp may cause stains
- The power switch is on the rear of the chassis, which may be problematic if installing the amp in a cabinet with limited access
- Needs a good 20 minutes to warm up, and on initial startup, the amp sounded a bit thin, bright, and constipated, but after one album, it opened right up
- Limited power output (15Wpc) may not be sufficient for all speakers or listening preferences, especially when wanting to play music very loud
Takeaway: The Fezz Audio Lybra 300B is a well-designed tube amplifier that delivers a rich and flavorful sound. It can bring out the best in your speakers, offering clarity and great sound.
Video review
Our take on the brand
The MC2301 is the first McIntosh vacuum tube amplifier to use our Quad Balanced design. This design cancels virtually all noise and distortion in the audio signal. As a result, even when amplified to high levels the signal is effectively free of any distortion. Our fuse-less short-circuit protection circuit Sentry Monitor™ disengages the output stage before current exceeds safe operating levels and then resets automatically. Inputs for balanced and unbalanced cables are available to provide flexibility in connecting the rest of your audio system.
Our summary
Product Strengths
- Fast response, with detail, and a warm tube sound
- Picks up detail with speed when playing Hi-Res digital content
Product Considerations
- Lacks sound stage depth/width, power, and feel compared to the reference system (vintage MC275 amplifiers)
- Super tweeters seemed to be sleeping—as if there was no data provided at that frequency
- Lacks a big window of performance, energy, and feel, providing a smaller window of performance albeit nice with a tube-like sound
- Bass with the MC2301s was starving when compared to the 275's
Comparisons (according to reviewers)
- Vs vintage 1960s MC275: MC2301 lacks sound stage depth/width, power, and feel, a full rich lush enveloping sound, and energy that stirs emotion
- Vs later generations of the MC275: MC2301 would be superior
Takeaway: If you don't have access to vintage MC275s, the MC2301 could be a good option, providing a tube-like sound with detail and speed. McIntosh should look back and reconsider past designs.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Sixty-five watts per channel provide plenty of power to drive many speakers
- Different output tubes can be used, such as EL-34s, KT-88s, 6550s, and KT-120s, as long as they are biased
- A built-in, high-quality current metering system allows for instant selectable anode current for biasing, making it a tube roller's dream
- The headphone amplifier uses the power amp's output stage instead of op-amps, making it smooth, detailed, and exhilarating
- Sounds warm and a little tubey, providing a musical and satisfying experience
Product Considerations
- Has five inputs, all unbalanced RCAs, with no inboard phono and no internal DAC
- No XLR compatibility
Comparisons (according to reviewers)
- Allnic Audio T-2000 integrated amplifier had a quartet of KT-170s, and it was one of the reviewer's three favorite integrated amplifiers of all time
- The sound with the EL-34s was more linear but somehow less interesting—less three-dimensional—when compared to the KT-150s
Takeaway: The Lab12 Integre4 is a well-made integrated amplifier that delivers a warm, huge, and detailed sound, making listening sessions memorable. With enough power to drive most speakers, it's a great way to attain joy and happiness at the same level as more expensive gear.
Video review
Our take on the brand
.png){kind=small}
Our Summary
Product Strengths
- More musically convincing, more detailed, more harmonious, more linear, and more transparent than any other similar EL34 design at any price.
- Piano music is most perfect and quick, with purity of tone and tambour with proper richness and speed.
- Silent with totally black backgrounds, micro and macro dynamics are unrestricted and natural.
- Reveals its glory quickly due to its transparency.
- Excellent fit and finish and it worked right out of the box.
Product Considerations
- Thick or lean sounding cables will make the 534 sound thick or lean, and it needs top-quality isolation and support.
- The reviewer recommends buying the 534 new as they haven't auditioned the original from the beginning of the century.
- The only major flaw is that it doesn't have 500 watts per channel, but a custom one can be ordered for a very high price.
Comparisons (according to reviewers)
- Vs E.A.R. 890: The 890 is more robust and powerful, but not more convincing if your speakers don't need the power.
- Vs Cary Audio Custom 300B: The 534 is vastly superior.
Takeaway: The E.A.R. 534 is a musically convincing and transparent amplifier that reveals nuances in music. It is easy to place, beautiful to look at, and can make vocals and piano sound exquisite.
Video review
Our take on the brand
How to buy
Amplifiers
Search all hifi products
Explore our database of 10,000+ new and 25,000+ used hifi products.
