Equipped with four Tung-Sol KT150 tubes for output amplification, one RCA 22DE4 for voltage rectification and four Tung-Sol 6SN7GTB for voltage amplification and driver stage. The tubes can be operated in Triode or Ultralinear Mode:
Triode provides rich and lush vocals, yet smooth and holography sound, ideal for vocals and string music. Ultralinear mode excels in details, improved power and extension. Clean, energetic and authoritative, ideal for music requires a lot of dynamic, punch and control.

CS-150A comes with 2 pairs of single ended RCA line-in and one RCA Pre-in to use it as a dedicated power amplifier with external preamp. The CS-150A also comes with a balanced XLR line input as well. The speaker outputs come with 4Ω and 8Ω output impedance to match more speaker options of your choice.

The CS-150A circuitry is hand-wired by skillful craftsman, with point-to-point circuit connection. The custom designed toroidal transformer and EI input transformer is specially designed for tube amp, providing stable power and solid timbre for the music. External BIAS selector & meter enables bias adjustment with ease. The Power-off Resume Feature restores the unit to the states prior to the latest power off state. Power-on Delay feature warms up the tubes for 30seconds for every power on, presents your music at the best condition every time.

Cayin CS-150A comes with a metal remote control, which enable the ease of operation for inputs and volume changes. 

SPECIFICATONS / PARAMETERS
Output Power : 2 x 55W (RMS Triode mode), 2 x 100W (RMS Ultralinear mode )
Frequency Response: 9Hz ~ 50kHz
Harmonic Distortion: 2% (1kHz)
Signal to Noise Ratio: 90dB
Input sensitivity: 380mV (Integrated input), 1200mV (preamplifier input)
Input impedance : 100kΩ
Output impedance : 4Ω, 8Ω
Power consumption : 520W
Vacuum Tubes: 4 x Tung-Sol 6SN7, 4 x Tung-Sol KT-150, 1 x RCA 22DE4
Input terminals: 3 x RCA Line in
Overall Dimensions: 420 x 489 x 218mm (W x D x H)
Net Weight: 34kg
Working Condition: Temperature 0°C ~ 40°C, Humidity: 20% ~ 80%