CK Series (CK1200.1 Black) Test Report and Product Video



1 Model number: CK1200.1 Class D Car Amplifier
2 Features:
1200W RMS Class-D amplifier.
1 ohm load stable.
Double Side PCB and SMD components.
Adjustable Input level, LPF, Subsonic function.
Advanced short circuit, overload, over heat and over/low voltage protection.
Heavy duty terminals.
Optional remote controller.
3 Detailed specs:
3.1 Test Condition.
All the specs were tested with following condition unless noted.
1. Power supply: 14.4V DC power supply
2. Test signal: 80Hz sine wave.
3. Loads: Resistor dummy load.
4. Environment: 25 degree C, open air.
5. Relative humidity: 70%.
6. Instrument: Audio Precision SYS-2322A.

3.2 Output power performance


Following table is the RMS output power with THD+N(<22KHz) value at 5%, 3%, 2% and 1%.
RMS power (1ohm) RMS power (2ohm) RMS power(4ohm)
5% 1110W 760W 450W
3% 1080W 730W 430W
2% 1050W 720W 420W
1% 980W 680W 400W
Table 1Output Power with THD+N
Following chat shows the output power with THD+N curve at 4ohm loads, 2ohm and 1ohm loads.

Chart 1. RMS output power @4ohm with THD+N.

Chart 2. RMS output power @2ohm with THD+N.

Chart 3. RMS output power @1ohm with THD+N.

3.3 Frequency Response

1. -3dB frequency response: 15Hz~225Hz.
2. -1dB frequency response: 25Hz~170Hz.

3.4 LPF & Subsonic Filter features

  1. LPF adjustable from 50Hz~225Hz.
  2. Subsonic Filter adjustable from 15Hz~55Hz.

Chart 4.LPF response

Chart 5.Subsonic Filter response

3.5 SUBSONIC LEVEL(0dB,6dB,12dB)

3.6 THD+N
THD+N=0.16% @ 30W output power with 4ohm load.
3.7 S/N Ratio  
3.8 Protection System 
1. Overload: 
   Protect less than 0.8 Ohm loads at full-scale output power.
2. Short Circuit:
   Full rated power short circuit protect test: passed.
   Full rated power long last short circuit test: 10 minutes passed.
3. Over temperature:
   Protect while inner temperature over 85 degree C.
4. Over/Low voltage:
Protect while power supply voltage over 16.5V or lower than 8.6V.
3.9 Idle current and Efficiency:
1. Idle current: 1.0A
2. Efficiency:  88% at THD+N=1% (4ohm)
3.10 Dimension
This amplifier’s size is at 140mmX262mmX54mm(W,L,H).