The CTH-8550 embodies everything that an integrated amplifier should be: Compact, practical, versatile, musical, elegant and powerful.

  • Category: Integrated


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.

Sound at your fingertips

The remote control is machined and milled from pure aluminium ingot, offering premium build quality and technology to enhance the user experience.

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.

Technical Data

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


< - 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