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.
Product Strengths
- The EHT combines tubes and transistors to mate the most desirable characteristics of both
- Amplifiers provide fullness and density, even at low listening volumes
- The EHT creates a natural sound with incredible saturation
- They are fully short-circuit proof at the outputs without any sound-degrading protection
- A switch-on delay is omitted because switching on/off develops no disturbing noise or dangerous signal in this circuit
Product Considerations
- Sound is focused on timbre rather than detail
- Their sound is soft rather than focused, rather warm than open, and rather close to us than presented in a perspective
- The devices are quite large, as they measure 434 x 184 x 434 mm (W x H x D) and weigh 14 kg each
Takeaway: The Thöress EHT monoblocks offer a holistic view of the musical material and its reinterpretation that can be very enjoyable for long listening sessions. They create events in their own acoustic environment, which is completely transferred to the listening room, creating a beautiful, organic, comprehensive, and internally properly arranged sound for those who value tonality above all else.
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EHT Power
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Manufacturer details
- Output Power: 30W (8 ohm), 40W (6 ohm), 50W (4 ohm)
- Output Resistance: Very low (high damping factor)
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:
- They draw heavily from classic professional audio design, with a clear emphasis on functionality and a vintage aesthetic reminiscent of 1950s and 60s laboratory equipment.
- Thöress uniquely combines tubes with carefully chosen solid-state components like MOSFETs and Schottky diodes to optimize tube performance and minimize noise, rather than adhering to a strictly tube-only design.
- Almost all inductive components, including power, output, and MC step-up transformers, are hand-wound in-house, allowing for precise control over their specifications and performance.
- Rather than using a printed circuit board (PCB), Thöress amplifiers are assembled point-to-point, which Reinhard believes is a superior approach for the large parts, high voltages, and need for ventilation in tube circuits.
Select products
F2A11 INTEGRATED
- Positioning: A compact integrated amplifier suited for small room applications and modest budgets.
- Description: Uses the vintage F2A11 tube in single-ended triode mode to deliver a simple 2×6 watt output ideal for minimal setups. Compared to the DF and EHT models that offer additional functions and higher power, this unit is best for users focused on basic performance without extra features.
DF AMPLIFIER
- Positioning: A versatile dual function amplifier that combines line control with headphone driving.
- Description: Features a minimalist vacuum tube circuit with a triode gain stage followed by a current buffer that supports low impedance loads, ensuring flexible connectivity. Compared to the entry-level F2A11 with its simple integrated design, the DF amplifier adds tone control and remote volume features for users needing extra functionality.
FULL FUNCTION PREAMPLIFIER
- Positioning: A versatile preamplifier offering both line control and a built-in tube phono equalizer.
- Description: Integrates a tube phono equalizer with a refined line amplifier circuit to process signals accurately. In contrast to the simpler integrated F2A11 and dual-purpose DF, this model is tailored for buyers who prioritize advanced tonal control for vinyl and line-level signals without a built-in power section.
EHT INTEGRATED AMPLIFIER
- Positioning: An integrated amplifier combining tube warmth with solid-state drive for challenging speaker loads.
- Description: Uses a single-ended hybrid triode topology that combines a vacuum tube section with MOSFET technology to deliver 2×20 watts and low output impedance. Compared to the F2A11 and DF designs, the EHT offers advanced drive and display of modern hybrid technology.
SE845 MONO AMPLIFIER
- Positioning: A high-end monoblock amplifier designed for refined, powerful performance.
- Description: Uses the well-known 845 power tube in a single-ended triode configuration with a custom dual-winding transformer that ensures precise control and low distortion. Compared to the preamplifier and EHT models, the SE845 is aimed at buyers who need robust, high-performance amplification.
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Used
Thöress
What if you spend more?
harmonic distortion - 0,0028 % at 1 W; 0,011 % at 5 W and 0,13 % at 50 W is achieved by harmonizing all circuits and components. the transformer core is vacuum impregnated, and the entire transformer is encapsulated in a special anti-vibration compound.
In addition, the massive, welded cover in which the transformer is located, creates effective electromagnetic shielding and contributes significantly to the excellent signal-to-hum distance. The additional capacitor at the input improves the dynamic of the anode voltage filtration. the filtration capacity is 3.900 mF / 550 V.
A choke, that is placed under welded cover, has been used to eliminate anode voltage ripple, which increases the filtering efficiency of the 100 Hz component of the anode voltage. the output permalloy transformers are specially designed for the power amplifier.
only high-quality polypropylene capacitors are used in the signal path. the conductors on the signal paths consist of slow drawn oxygen-free copper, which is coated with pure silver. instant switching between feedback and zero feedback.
Our summary
Product Strengths
- Exemplary build quality of the enclosures, with solid metal inserts made of aluminum crafted on CNC milling machines
- Canor uses its own fully automated SMT (Surface Mounted Technology) line to assemble and solder the boards
- The amplifiers are noted for their noise-free reproduction capability in the musical interstices
- The sound is presented with great naturalness and spaciousness, with a very clean presentation of individual instruments
- The labels of the connections are listed twice on the back, overhead as well, a detail praised for practicality
Product Considerations
- The included system remote control could be a bit bigger
- The tubes require a lengthy break-in period of several hundred hours
- Some might prefer tube amplifiers without negative feedback, a switchable option on the power amps
- Some might prefer triode mode over ultralinear mode, which requires the signal to pass through another circuit
Takeaway: The Canor Hyperion P1 and Virtus M1 amplifiers offer exemplary workmanship and sound quality, delivering a natural and spacious audio experience with impressive clarity. The noise-free performance makes this set a great option for audiophiles.
Video review
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Product Strengths
- Highly customizable, allowing users to request specific configurations and tube types
- Offers a wide range of tube rolling options to pinpoint the desired sound signature
- Price-to-performance ratio is excellent, competing with amps costing around $5,000
- Can drive high impedance headphones like ZMF, HD 800, and T1, as well as planars and low ohm headphones with specific tube configurations
- Can sound very good with inexpensive tubes, but can be elevated to a ridiculous performance level with higher end tubes
- There is a HeadFi thread to help with connectivity options
Product Considerations
- Ordering process is unconventional, requiring direct communication through a HeadFi thread
- There is a wait time for builds, potentially around six months
- Tube rolling can become expensive due to the variety of options and the cost of some tubes
Takeaway: The Glenn is a highly customizable amplifier that provides excellent performance for the price, especially for those who enjoy tube rolling and experimenting with different sound signatures. It is a versatile amp that can drive a wide range of headphones, making it a great choice for many audiophiles.
Video review
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Our summary
Product Strengths
- Powerful, able to drive any speaker at any level with ease
- Delivers a new dimension in realism at any volume level, exposing the timbre of bass instruments unlike ever heard before
- Reveals harmonic quality of instruments and voices
Product Considerations
- Heavy, weighing 140lb (63.5kg), requiring assistance for moving and unboxing
- High running temperature (55-65oC across the chassis) and draws 500W from the wall when idle
- When speaker cables are terminated with spade lugs, caution is advised as the posts are close together
- Output is floating—it should not be connected to any loudspeaker with a grounded 'black' terminal
- BAT components take a long time to "break in" (400-500 hours of use)
Takeaway: The BAT REX 500 is a very powerful amplifier that drives speakers with ease and reveals new levels of realism in familiar recordings. It is a must-audition for those seeking reference-level power amplification.
Video review
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Our summary
Product Strengths
- Delivers 350 watts into 2-ohm, 4-ohm, or 8-ohm loads
- The design has a purity that is quite amazing
- Effortless power
- Soundstage is big
- Transparent
Product Considerations
- Not necessarily suitable for pairing with extremely cold sounding, sterile or bright speakers
Comparisons (according to reviewers)
- MC3500 is more open and airy, with base not as hard fisted, compared to Krell KSA 250
- It compares with brands like soulution, big Audio Research, and CH Precision, but at a lower cost
Takeaway: The MC3500 is an impressive amplifier that delivers a natural and pure sound, able to drive almost any speaker. If you're in the market for a McIntosh amp, this is the one that makes music sound pure, simple and unadulterated.
Video review
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What competes at this price?
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
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Our Summary
Product Strengths
- Impressive bass response, dynamics, and power for a 12-Watt single-ended tube amplifier
- Dense, tactile, and sweet harmonic color with a clean and clear sound
- Robust build quality with point-to-point hand wiring and exceptional parts
- Easy biasing with a switch for KT88 to KT120/150 mode
- Proprietary transformers that contribute to a flatter response and deeper low bass
Product Considerations
- Careful speaker matching is required, ideally with speakers that have at least 94dB/W efficiency and a stable speaker load
- Must be turned off for at least 10 minutes, preferably 30, before turning it back on, or the rectifier tube could blow
- The correct tube type must be selected on the back of the amp, otherwise performance could be lackluster or tubes could be damaged
- The XLR input involves a slight reduction in detail due to using an input transformer to convert the incoming balanced signal to single-ended
Comparisons (according to reviewers)
- The Bryce eliminates the shortcomings of ampsandsound Nautilus when used as a speaker amplifier, adding dynamics, bass, and an extended top end
- The Bryce monoblocks are more romantic in execution, with single-ended construction—compared to the push-pull output of ampsandsound Zion
Takeaway: The Bryce Monos are high-quality amplifiers with a surprisingly powerful and detailed sound, providing an engaging listening experience. They are great for audiophiles looking for a tube amp that delivers both emotional connection and technical performance.
Video review
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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
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Our Summary
Product Strengths
- Simplicity mixed with extreme refinement delivers something special that is unforgettable
- Amazing bass control, even over speakers with notoriously floppy bass
- Solid-state quiet, with no noise or hum present even with ears pressed up to the speakers
- Calmly pulls one into the presentation, taking one further into the music
- Excels with music featuring a lot of inner detail or acoustic instruments, resolving textures and attacks with precision
- Sheer physical quality, both inside and out, is the best of the best
Product Considerations
- If new to the 300B tube, note these tubes have no central locator pins like other power tubes, one can put these tubes in their sockets wrong and blow the amplifier up
- Requires no setup other than installing the tubes
Comparisons (according to reviewers)
- Attention to detail is not seen on a McIntosh
- Only the BAT REX Power Amplifier delivers bass grip and resolution at the same level
Takeaway: The ampsandsound Black Pearl amplifier offers a unique and immersive listening experience with exceptional detail and bass control. It is a destination product worth the investment for those who truly appreciate high-quality audio.
Video review
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Our Summary
Product Strengths
- Offers a remarkably smooth, unforced, and natural presentation with a touch of warmth
- Excels in detail retrieval and textured presentation of instruments and vocals, making the music feel alive
- Presents a wide and holographic soundstage, especially when paired with speakers that are already strong in this area
- Demonstrates agility, precision, and clarity, combined with a naturalness that eluded earlier generations of Chord amplifiers
- Scales dynamically and has the ability to punch hard when required
Product Considerations
- Has a minimalist design with just four line-level inputs, lacking features like phono stages, tone controls, headphone outputs, or DAC modules
- Some may find its sonic signature prioritizes articulation over qualities such as richness and authority, potentially sounding thin if partnered poorly
- Balance control has no center indent or marked position
- The polychromatic lighting may be an issue for the color-blind
- Remote operation can be affected by direct sunlight
Comparisons (according to reviewers)
- Vs Rega Elex-R Mk3, the Chord Ultima Integrated delivers undeniably elevated sound in all respects, with greater dimensionality and smoother vocals
- Vs Bryston 7B 3 monoblocks, the Chord Ultima Integrated offers a weightier and more thunderous delivery, especially in the midrange and vocals, with more inner warmth in tone
- Vs Benchmark AHB2, the Chord Ultima Integrated provides a more energetic and fun listening experience, with Thor-like bass impact and overall superior dynamics
- Vs Accuphase E-270, the Chord Ultima Integrated is warmer, rounder, more powerful, and refined, with a more fluid and emotionally engaging performance
Takeaway: The Chord Ultima Integrated is a unique and well-built amplifier that combines a visually pleasing design with a captivating sound, full of detail and dynamic precision. It brings music to life with an engaging and immersive experience, making it a worthy addition to any audiophile's setup.
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