darTZeel CTH-8550 Integrated Amp w/ Phono
No compromise « all in one » music machine with breathtaking looks and sound quality.
Priced to sell fast !!!
Incredibly mint unit, very well taken care of, and is fairly unique for having both MM and MC inputs enabled!
This is still one of the very best integrated amplifiers out there, at any price! MSRP when new 25,000.
Made in Geneva, Switzerland.
darTZeel CTH-8550 integrated amplifier | Stereophile.com
Review: (updated) darTZeel CTH-8550 integrated amplifier (with ...
darTZeel - Positive Feedback
dartTZeel CTH-8550 (£16,500 line only) - Integrated amplifiers
Unit is in original box, with remote control and manual. It’s currently available for auditions in Chicago Area
nearly all integrated amplifiers on the market have been built to price points that require too many concessions in circuit design and in parts quality, leading to lackluster sound.
darTZeel CTH-8550 is an integrated amplifier built without sonic compromise.
With its dedicated dual-mono amplification sections, its Zeel inputs, its gratifyingly excellent phono stages, and remarkable versatility, the CTH-8550 is the most capable integrated amplifier one could dream up.
CTH-8550 offers eighty-five percent of the perceived performance of its NHB-series ancestors, but at a very substantial cost savings.
Control at the finger
The remote control is machined from the aluminum billet like a gold ingot, and insures the owner the listening session will be fun.
Integrated “all in one” dual mono amplifier
with 9 configurable inputs.
With nine analog inputs, including 1 XLR and 2 Zeel BNC 50-ohm inputs, as well as 2 optional phono inputs, any source will find its place.
With a reserve of power to tame the toughest speakers, the darTZeel CTH-8550 integrated analog amplifier is the most complete in its category.
darTZeel is CTH-8550 full featured integrated amplifier. It combines in one casing most of the good things musical lovers found in our flagship NHB series.
The CTH-8550 features power output stages which include on board regulated power supplies for a very compact global layout. This new circuit brings outstanding transparency, speed, yet delicacy, giving a maximum listening pleasure.
With no less than nine inputs in total, the preamplifier section is dual-mono – one dedicated circuit per channel – with a minimal footprint which allows for very short signal paths.
Key features include:
* A newly designed fluorescent display for user-friendly operation. * 7 standard inputs blended from a mix of Zeel, RCA and XLR sockets. * 2 additional, optional Phono inputs (1 MC, 1 MM), easy to implement at any time (factory upgrade only, though). * Full HT bypass function for all inputs. * 1 darT preamp output for driving an external NHB-108 power amplifier. * 1 RCA preamp output for driving any other optional power amplifier. * 1 RCA REC output, with independent record source selection. * A fully featured remote control, 100% darTZeel designed. * A new kind of approach in mechanical housing design thanks to state of the art Laser cutting & welding technologies, ensuring unprecedented high rigidity and easier assembly and maintenance procedures.
Output power stage
darTZeel designed a new circuit allowing cool running behaviour for less power consumption and more environmental friendly operation. Signal path has been carefully kept as simple as possible. The use of two paralleled output transistor pairs was chosen for hassle-free setup, whatever the kind of speaker used. The additional power gain provided by these two output pairs allowed us to reduce the number of silicon junctions in driver stages, thus keeping all speed and transparency we were looking for. There are now only three junctions in the power section, with an output power capability of 220 watts per channel under 8 Ohms, and a whopping 350 watts into 4 ohms!
All regulated power supplies involved in the analog section are located on the audio circuits, ensuring best possible ripple rejection and low noise floor. Optional phono sections are implemented on same circuits for very short signal paths from the input RCA connectors. Source selection and loudness level are controlled through very high performance, dedicated circuits. All DC drift is now entirely compensated by digital means, allowing the compensation to be completely kept outside of the signal path, a world premiere in audio!
Power supply transformers
Besides its unique, huge toroidal power transformer, the darTZeel CTH-8550 is a full dual-mono design. We chose to implement only one power transformer in order to minimize magnetic fields induced to low level signals, yet over sizing it enough to deliver all power needed under any demanding circumstance. A second, smaller transformer is in charge of the low level signal. So, the control panel allows for disabling the big power transformer in case of preamplifier usage only, bringing improved quietness and coolest operation.
Pleasure Control again
The new Pleasure Control optical encoder, custom-made for darTZeel by Elma, offers extreme feelings and high precision. The volume control electronics involves high quality semiconductor devices for best reproduction accuracy.
New display control panel
Extremely convenient and user friendly, the new display will allow you to fully operate your CTH-8550 in the most convenient way. Each parameter can be easily adjusted, such as source level, source name, default source balance, record source, illumination display, and so on…
Security and customization
Each CTH-8550 is delivered with its own dedicated USB key which contains all customer information: Owner’s name, Serial number, Firmware version and Voltage range settings. The provided USB key will also allow for eventually updating either CTH-8550’s firmware or software in the future.
Entirely designed with a dedicated 3D-CAD software, the new cabinet is made from high quality, 2mm thick, Swedish Grade Steel. Starting with a plain steel sheet, it is cut with a high precision Laser Beam, then all parts are laser-welded together, even hand welded in critical areas, then hand polished and finished before being painted in an industrial oven. The result is just breathtaking. Aluminium heat sinks are sandwiched inside the steel structure, allowing for optimal thermal dissipation and extremely high global rigidity. The front plate is CNC-machined from a plain, 15 mm thick, aluminium sheet, giving the darTZeel CTH-8550 its incomparable finishing.
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
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