Cayin CS-88A KT88 silver

The Cayin CS-88A KT88 is a tube amplifier, the successor to the A-88TMK2 Selection model. This integrated stereo amplifier offers two listening modes: a triode mode focused on a smoother sound reproduction, and an ultra-linear mode delivering higher power. It outputs 48 watts per channel in ultra-linear configuration. Equipped with transformers specifically designed for this model and a built-in MM phono input, the CS-88A KT88 is aimed at listeners seeking precise musical reproduction. Its 28 kg construction reflects meticulous design, and its integrated bias measurement system makes adjustment easy.

Prestigious Build Quality

The Cayin CS-88A KT88 immediately commands respect with its physical presence. Its massive chassis, measuring 420 × 382 × 195 mm and weighing an impressive 28 kg, is a testament to uncompromising construction. The aluminum front panel, available in silver or black finish, displays timeless elegance that will fit perfectly into any refined interior.

Inside, the device reveals meticulous attention to detail. The custom toroidal transformer ensures stable and powerful power delivery, while the wide-bandwidth output transformers contribute to the overall sonic finesse. These high-quality components partly explain the substantial weight of the unit, but also guarantee its longevity and exceptional performance.

The tubes, the true beating heart of this amplifier, are arranged to optimize heat dissipation while creating a visually captivating aesthetic. The configuration includes two 6SL7 tubes and two 6SN7 tubes for the preamplification stage, as well as four imposing KT88 tubes for the amplification stage. This carefully designed architecture delivers a rich and detailed sound, characteristic of the best tube amplifiers.

The Magic of Tubes

The Cayin CS-88A KT88 takes its name from the KT88 power tubes it uses, renowned for their ability to deliver ample power while preserving musicality. These tubes, combined with the 6SL7 and 6SN7 in the preamplification stage, give the amplifier its distinctive sonic signature.

One of the most remarkable features of the CS-88A KT88 is its ability to operate in two distinct modes. The triode mode prioritizes musicality and warmth, offering a wide stereo image and a particularly seductive sound texture. In this configuration, the amplifier delivers 27 watts per channel, enough power to drive medium- to high-sensitivity speakers in a moderately sized listening space.

The ultra-linear mode, on the other hand, increases the available power to 48 watts per channel and extends the response in the low frequencies. While musicality is slightly less pronounced than in triode mode, it remains exceptional compared to conventional transistor amplifiers. This mode is ideal for speakers that require more power or for listeners who prefer a more dynamic and extended bass response.

Connectivity and Versatility

The Cayin CS-88A KT88 stands out for its versatility, offering several connection options to suit different setups. The amplifier features three line inputs, including a dedicated MM phono input for turntables—a notable improvement over the previous model, which lacked this feature.

The MM phono input boasts carefully considered technical specifications, with an input sensitivity of 3 mV, an input impedance of 47 kΩ, and RIAA deviation of less than ±0.25 dB. These specifications ensure faithful reproduction of vinyl records without the need for an external phono preamplifier, simplifying installation for fans of this format.

Another noteworthy feature is the presence of a “Pre-In” input, allowing the CS-88A KT88 to be used as a power amplifier. This option is particularly interesting for users wishing to integrate the amplifier into a home theater system or to use a specific external preamplifier while still benefiting from the sonic quality of Cayin’s tube power stages.

The speaker outputs are compatible with 4 and 8 ohm speakers, ensuring compatibility with most speakers on the market. This flexibility, combined with the amplifier’s ample power, allows for a wide range of speaker combinations according to the user’s sonic preferences and spatial constraints.

A Captivating Listening Experience

The Cayin CS-88A KT88 offers a listening experience that clearly stands out from conventional transistor amplifiers. Tests conducted by specialized magazines highlight the amplifier’s ability to give listeners “goosebumps” during musical playback, demonstrating its capacity to convey musical emotion with rare intensity.

The frequency response extends from 10 Hz to 42 kHz (-3 dB), ensuring faithful reproduction of the entire audible spectrum and beyond. The harmonic distortion rate of 1% at 1 kHz may seem high compared to modern transistor amplifiers, but this characteristic paradoxically contributes to the warmth and musicality unique to tube amplifiers.

The wide-bandwidth output transformers, specially designed for the CS-88A KT88, enable remarkable finesse in reproduction, revealing the finest details of recordings without ever becoming overly analytical. The stereo image unfolds with breadth and precision, creating a particularly convincing three-dimensional soundstage.

The signal-to-noise ratio of 93 dB ensures a silent background, allowing musical micro-details to be fully expressed. This feature, combined with the 300 mV input sensitivity, guarantees optimal compatibility with most modern sources without the risk of annoying background noise.

Technical Specifications

General Information

• High-end tube amplifier, entirely hand-built
• Point-to-point construction with high-quality wiring
• Ideal for audiophiles seeking warmth, precision, and power
• Key features:
  • 100% analog tube amplification, handcrafted
  • Selectable triode / ultralinear modes
  • Simplified bias adjustment and monitoring
  • Compatible with EL34 / KT88 tubes
  • User comfort (memory, remote control, protective cover)
  • Audiophile design with high-quality components

Amplification and Tubes

• Preamplification stage:
  • 2 x 6SL7 tubes
  • 2 x 6SN7 tubes
  • Smooth, detailed, and musical sound
• Amplification stage:
  • 4 x KT88 / 6550EH tubes in push-pull class AB1 configuration
  • External tube selector for EL34 / KT88 compatibility without complex adjustment
• Operating modes:
  • Triode mode: 27 W + 27 W (RMS)
  • Ultralinear mode: 48 W + 48 W (RMS)
  • Integrated triode / ultralinear selector to tailor the sound

Connectivity and Use

• Operating modes:
  • Integrated amplifier
  • Power amplifier (power amp mode)
• Inputs:
  • Built-in phono input
  • Dedicated preamplifier input (pre-in)
• Electrical characteristics:
  • Input impedance: 100 kΩ
  • Input sensitivity: 300 mV (integrated mode), 1000 mV (pre-in mode)
  • Output impedances: 4 Ω and 8 Ω

Audio Performance

• Frequency response: 10 Hz – 42 kHz (-3 dB)
• Total harmonic distortion: 1% at 1 kHz
• Signal-to-noise ratio: 93 dB

Power Supply and Protection

• Transformers:
  • 2 wide-bandwidth EI output transformers
  • Specially designed toroidal transformer for power supply
• Protection system:
  • Soft start function (30 seconds) to preserve the tubes
  • Memory of operating state after shutdown
• Maximum power consumption: 280 W
• External bias adjustment with built-in meter on the top panel

Construction and Components

• High-precision ALPS motorized potentiometer (Japan origin)
• Internal wiring with thick silver-plated cable for better signal transmission
• Easily installable tube protective cover
• Refined and robust design for excellent heat dissipation
• Designed for easy tube replacement
• Remote control included for convenient use

Physical Characteristics

• Dimensions (W × D × H): 420 × 382 × 195 mm
• Net weight: 28 kg