Description
Cayin CS-805A Tube Integrated Amplifier
The Cayin CS-805A Tube Integrated Amplifier is a tube integrated amplifier operating in Class A.
It delivers 2 x 50 watts of power in a single-ended configuration, a notable feature for this type of design. Its architecture is based on the combination of three types of tubes: 805A for power, 300B for the preamplification stage, and WE6SN7 for control functions, each contributing to the sound reproduction according to its properties.
The CS-805A offers several connectivity options and allows for adjustments to the sound signature, providing a certain flexibility depending on listening preferences and associated systems.
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Features
In their single-ended class A amplifier, two 805A output tubes deliver a powerful 2x 50 watts. The classic WE6SN7 output triodes are used for the voltage amplifier stage of the Cayin CS-805A integrated amplifier. Exquisite 300B work in the driver stage for the 805A output tubes.
Three pairs of line inputs are complemented by an additional pair of pre-inputs for connecting an external preamp.
The CS-805A can also be used as a power amplifier or integrated into home cinema systems with AV processors. The CS-805A has a high-quality headphone output with excellent sound characteristics that can drive most listeners befitting their status.
Users can easily adjust the bias of the 805 tubes via the integrated bias display.
With a so-called hum balance control, the user can also adjust the level of the 300B tubes from the outside. The value of the negative feedback can be selected between 0 and -3dB on the remote control in order to adapt the sound character of the amplifier to your individual listening habits.
At 0dB, the Cayin CS-805A reveals an open, fluid sound with plenty of detail, while at -3dB, playback appears smooth, precise, and controlled.
Soft start circuitry and high voltage delay to protect the amplifier work together to extend the life of the tubes and sensitive components. Easily accessible high voltage fuses are used to protect the amplifier. In the event of a tube failure, the fuse reacts immediately and thus protects the circuitry, which is implemented in the finest point-to-point wiring.
High Quality
Only high-quality components are used, these include:
- an Alps volume control, porcelain tube sockets, selected capacitors and carbon film resistors with the highest audio quality
- a large dimensioned toroidal transformer guarantees a stable power supply even with impulsive music.
- with a large bandwidth, the EI output transformers ensure optimal coupling with the loudspeakers used.
The Cayin CS-805A comes standard with a remote control that stores the last operating status of the device after it was turned off.
FAQ’s
- What makes the Cayin CS-805A special? The CS-805A is a pure Class A tube amplifier using 805 output tubes, known for delivering rich, lifelike sound with exceptional detail and dynamics.
- How much power does it deliver? It provides a robust output that can drive most high-quality speakers with ease, giving you powerful yet refined sound at all listening levels.
- Can I use it with my existing audio setup? Yes! It features multiple inputs, making it easy to connect CD players, DACs, streamers, and other components.
- Is it difficult to maintain a tube amplifier? Not at all – tube amplifiers require occasional tube replacement, but the CS-805A is designed for easy tube bias adjustment and long-term reliability.
- Is the CS-805A good for all music genres? Absolutely – whether you enjoy jazz, rock, classical, or modern pop, its warm, natural sound signature makes every genre come alive.
Specifications
Amplification
- Output power:
- 2 × 35 W RMS (THD < 3%)
- 2 × 46 W (THD < 9%)
- Audio performance:
- Frequency response: 12 Hz – 33 kHz (–3 dB)
- Total harmonic distortion: 0.2% at 1 W / 1 kHz (at 90% of rated power)
- Signal-to-noise ratio: 90 dB (A-weighted)
- Input sensitivity: 320 mV
- Input impedance: 100 kΩ
Tube Configuration
- Power tubes: 2 × 805A (triodes – Psvane)
- Driver tubes: 2 × 6L6 (replaceable with EL34, KT88, etc.)
- Preamplification: 1 × 6SN7
- Input amplification: 2 × 6JC6
Features
- Front panel analog VU meters (power indication)
- Manually adjustable bias via trimmer (integrated measurement needle)
- Hum balancer to minimize background noise
- Adjustable negative feedback level (for a more controlled or open sound)
- Robust IR remote control: source selection, volume, mute
- 6L6 tubes can be replaced (compatible with EL34, KT88, etc.)
Construction and Design
- Solid metal chassis, matte black or silver finish
- Symmetrical design and meticulous internal wiring
- Custom output transformers for stable load, even with demanding speakers
Connectivity
- Speaker outputs: dedicated 4 Ω and 8 Ω terminals
- Headphone output: front jack (compatible with 16–300 Ω)
- Analog inputs:
- 3 × RCA (LINE 1, LINE 2, LINE 3)
- 1 × Bluetooth (version 5.0)
Bluetooth Section
- Version: Bluetooth 5.0
- Chipset: Qualcomm QCC5125
- Integrated DAC: ESS SABRE ES9018K2M
- Supported codecs:
- UAT (Ultra Audio Transmission)
- LDAC, aptX HD, aptX, aptX Low Latency
- AAC, SBC
- Effective range: ≤ 10 m
- Device name: Cayin HD BT
Dimensions and Weight
- Dimensions (W × D × H): 420 × 389 × 248 mm
- Net weight: 35 kg
- Power consumption: 410 W
