The CS-55A is the most recent advancement in tube amplifier technology created by Cayin. This state-of-the-art machine boasts forty watts per channel by using 4 KT88 tubes in Class AB ultra-linear push pull amplification. The CS-55A consists of four pairs of input: one Phono, a USB port, and two line inputs giving a wide range of options for any listener.

The CS-55A comprises of a fully anodized aluminum front, a vented chassis with a gorgeous finish, the finest hand-made point-to-point wiring, and a soft-start circuit to enhance the life of the toroidal power transformer and output transformers.

CS-55A includes a built in MM phono section to accommodate turntables and a built-in high resolution DAC for use with computers. Via the 2.0 USB input, the DAC is capable of covering digital audio signals up to 32bit | 384kHz. This combination of a high end DAC and tubes makes for a rich and detailed soundstage.

Cayin CS-55A Tube Integrated Amplifier:
Type: Tube Integrated Stereo Amplifier (Switchable between EL34 and KT88 tubes)
Amplifier Topology: Class AB, Triode (TR) and Ultralinear (UL) modes

Power Output (RMS):
EL34 Tube Configuration:
Triode Mode (TR): 20W + 20W
Ultralinear Mode (UL): 38W + 38W
KT88 Tube Configuration:
Triode Mode (TR): 22W + 22W
Ultralinear Mode (UL): 40W + 40W

Distortion & Performance:
Total Harmonic Distortion (THD): 1% (1kHz)
Signal-to-Noise Ratio (S/N): 92dB
Frequency Response (EL34): 5Hz ~ 48kHz (-3dB)
Frequency Response (KT88): 5Hz ~ 44kHz (-3dB)

Input Section:
Input Sensitivity (EL34): 280 mV
Input Sensitivity (KT88): 270 mV
Input Impedance: 100 kΩ
Input Terminals: USB, PHONO, CD, AUX (RCA)
Output Impedance: 4Ω, 8Ω

Phono Stage Section:
Type: Moving Magnet (MM)
Input Sensitivity: 3 mV
Input Impedance: 47 kΩ
Total Gain: 40 dB
RIAA Equalization Error: Lower than ±0.25 dB
Signal-to-Noise Ratio (S/N): 68 dB

USB DAC Section:
Compatibility: USB Audio Class 1.0 and Audio Class 2.0
Word Length: 16 – 32 bits
Sampling Rate: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz
Operating System Support: Windows XP®, Windows Vista®, Windows 7®, Windows 8®, Mac OS (10.6.3 and above)

Tube Complement:
EL34 Configuration: 12AX7/ECC83 × 2, 12AU7/ECC82 × 2, EL34 × 4
KT88 Configuration: 12AX7/ECC83 × 2, 12AU7/ECC82 × 2, KT88 × 4

General Specifications:
Dimensions (W×D×H): 360mm × 334mm × 180mm
Net Weight: 17 kg
Max Power Consumption: 270 W
Working Condition: Temperature 0°C ~ 40°C, Moisture 20% ~ 80%
Storage Condition: Temperature -20°C ~ 70°C, Moisture 20% ~ 90%

Included Accessories:
Remote Control, Power Cable, User Manual (Specific accessories to be confirmed with manufacturer)

Additional Features:
Operating Modes: User-selectable Triode (TR) or Ultralinear (UL) operation
Input Selection: Dedicated inputs for Phono, CD, AUX, and USB DAC
Tube Protection: Soft-start and delayed muting circuit