Dartzeel CTH-8550
The Dartzeel CTH-8550 MkII couples lifelike timbre with effortless 200W power, bringing dense mixes into vivid focus through exceptionally stable, three-dimensional imaging. The Absolute Sound highlights its near-real textures and refinement, while Part Time Audiophile heard exceptional micro-detail, pace and organic tonal color. With serious phono capability and extensive analog inputs, this is a lavishly built integrated for emotionally immediate music-making.
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Deliciously Crispy
Sound Quality
96/100
Build Quality
95/100
Features Connectivity
87/100
Value for Money
92/100
Pros
Exceptionally natural, refined timbre with a slightly warm, emotionally engaging balance.
Expansive, precisely locked-in three-dimensional imaging and strong separation in complex recordings.
Bold, controlled dynamics and ample power for most loudspeakers.
Superb Swiss-grade build, comprehensive analog connectivity, and an excellent phono stage.
Cons
Its premium price places it beyond the reach of many otherwise committed audiophiles.
Compared with separates, it offers less ultimate power and system flexibility for demanding setups.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 96/100
Reviewers portray the CTH-8550 MkII as an unusually complete musical performer: richly natural in tone, exceptionally revealing, dynamically unconstrained, and capable of expansive, stable three-dimensional imaging. Its presentation is slightly warm of strict neutrality, but the reports consistently describe that character as refined, realistic, and deeply involving rather than softened or vague.
Transparency Resolution
96/100
The Sound Advocate praises its reproduction of detail, subtlety, natural harmonics, and a notably black background, while Part Time Audiophile says it can reveal “sonic secrets writ large.” Reviewers also describe impressive separation in dense material, with instruments and voices remaining distinct rather than smeared together.
Tonal Balance Musicality
97/100
The Absolute Sound calls the sound luscious and only a hair warm of neutral, praising its ability to recreate real-world textures and timbres with finesse. Across the reviews, the amplifier is repeatedly described as beautiful, organic, liquid, natural, and emotionally communicative, with an ease that makes long listening especially compelling.
Dynamics
96/100
Its 200Wpc rating is backed up by listening reports of bold, powerful delivery with most speakers and no apparent strain. Reviewers praise its full-scale dynamic surges, pace, transient speed, rhythmic drive, and ability to preserve variations in loudness without losing composure.
Soundstage Imaging
97/100
Spatial performance is a recurring highlight. The Sound Advocate calls the imaging revelatory and arguably the best it has heard, citing locked-in image locations and a huge, open three-dimensional presentation; Part Time Audiophile likewise reports startling depth, stable placement, and superb instrumental separation.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
95/100
Reviewers consistently describe the Swiss-made amplifier as impeccably finished, muscularly built, and luxurious to use. Stereophile notes impeccable fit, finish, and materials, while other reports highlight substantial metalwork, a hefty chassis, robust speaker terminals, and the distinctive tactile quality of the volume control.
Features Connectivity
87/100
The CTH-8550 is unusually well equipped for a high-end analog-focused integrated amplifier, with four RCA line inputs, balanced XLR, proprietary Zeel BNC connections, RCA and darT line outputs, and substantial speaker terminals. It also provides MM and MC phono provisions, including adjustable MC gain, but it does not offer the broad digital, streaming, HDMI, or headphone facilities expected from all-in-one modern designs.
Value for Money
92/100
At roughly $32,000 to $41,800 depending on version and market, this is undeniably an expensive integrated amplifier. Even so, The Absolute Sound finds it competitive with, or better than, integrated amplifiers in the $50,000–$60,000 class, while Part Time Audiophile frames it as delivering much of darTZeel’s separates performance for substantially less outlay.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Nominal Output Power
- 200 watts RMS (230 watts peak) @ 8 ohms 330 watts RMS (360 watts peak) @ 4 ohms 400 watts RMS (500 watts peak) @ 2 ohms (software limited)
- Line Gain
- 0 dB nominal, up to + 12 dB (+22 dB custom)
- Power Stage Gain
- 26 dB @ 8 ohms
- Analog Input Impedances
- 1 x Zeel BNC 50 ohms 1 x RCA line > 30 kohms 1 x XLR > 30 kohms Optional Phonos: Phono MM = 47 kohms. Neumann RIAA 4th pole included Phono MC = 1 kohms. Neumann RIAA 4th pole included
- Line Output impedances
- RCA = 75 ohms, darT BNC = 50 ohms
- Speaker Output Impedance
- < 0.33 ohms from 20 Hz to 20 kHz (measured under 8 ohms)
- Frequency Response
- 2 Hz - 200 kHz, +0, -3 dB
- Rise Time
- < 0.8 µs
- Slew Rate
- > 88 V/µs, peak-peak
- DC Output Voltage
- < ± 15 mV max
- Total Harmonic Distortion (THD)
- < 1 % from 7 Hz to 77 kHz within the output dynamic range
- Temporal Distortion
- None, at any level and load, as specified above
- Crosstalk
- < - 90 dB from 20Hz to 20kHz
- Signal to noise ratio
- > 115 dB (A) @ nominal power
- Power consumption
- 3 watts Standby, 40 watts @ idle, 1000 watts @ maximum output power
- Size in mm
- 440 x 350 x 170 (WxDxH). Total deep with handles : 415mm
- Size in inches
- 17.32 x 13.78 x 6.7 (WxDxH). Total deep with handles : 16.4 inches.
- Net weight
- 28 kg
Manufacturer's Description — Dartzeel
The CTH-8550 embodies everything that an integrated amplifier should be:Compact, practical, versatile, musical, elegant and powerful.
Until recently, integrated amplifiers only achieved distinction despite trade-offs in design.
Most integrated amplifiers have been built under budget and pricing constraints that leave little room for high performance.
That's why darTZeel is proud to present the CTH-8550, the first integrated amplifier without compromise.
With its dual-mono architecture, 50-ohm Zeel inputs, optional high-quality phono stages and remarkable versatility, the darTZeel CTH-8550 is the integrated amplifier of choice for audio enthusiasts.
CTH-8550: at the heart of the music
With up to nine analogue inputs for RCA, XLR and Zeel 50-ohm cables, all sources including turntables are accommodated.
Boasting ample power reserve capacity, a wide range of functional features and unrivalled ease of use, the CTH-8550 is the most complete integrated amplifier in its field.
Dual-mono design
A look inside the darTZeel CTH-8550 reveals a dual-mono design, including separate channel windings from both toroidal transformers.
Its sound image is revealed in an exceptionally pure expression.
Style and functional features
The darTZeel CTH-8550 is equipped with a plasma control panel, offering excellent contrast when viewed from any angle. A range of menus allows you to individually configure all settings for each input source.
Ease of use
Volume control is handled by an optical encoder notched magnetically, for unrivalled touch and precision. Round steel buttons add to the unit's appeal.
Verified Dealers
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Authorized dealers for Dartzeel CTH-8550
- The Audio Association — in-store — Anaheim, California, United States (website)
- Absolute Sounds — in-store — London, England, United Kingdom (website)
- Alma Music & Audio — online and in-store — San Diego, California, United States (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Ana Mighty Sound — online and in-store — Paris, Île-de-France, France (website)
- Ars Antiqua Audio — online and in-store — Boadilla del Monte, Comunidad de Madrid, Spain (website)
- ATR - Audio Trade — in-store — Eltville am Rhein, Hessen, Germany (website)
- Audio Absolute — in-store — Tambon Bang Khun Kong, Chang Wat Nonthaburi, Thailand (website)
- Audio Exotics — in-store — New Territories, Hong Kong (website)
- Audio Natali — in-store — Montecatini Terme, Toscana, Italy (website)
and 24 more verified dealers