Model number: CK1800.1 Class D 1800Wattsx1CH
1800W 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 protection.
Advanced clip limit / thermal power limit function.
Optional remote controller.
All the specs were tested with following condition unless noted.
Power supply: 14.4V DC power supply
Test signal: 80Hz sine wave.
Loads: Resistor dummy load.
Environment: 25 degree C, open air.
Relative humidity: 70%.
Instrument: Audio Precision SYS-2322A.
3.2Output 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)
Table 1Output Power with THD+N
Following chart shows the output power with THD+N curve at 4ohm loads, 2ohm loads and 1ohm loads.
Chart 1. RMS output power @4ohm with THD+N
Chart 2. RMS output power @2ohm with THD+N
Chart 3. RMS power @1 ohm with THD+N
3.3 Frequency Response
1. -3dB frequency response: 14Hz~220Hz.
2. -1dB frequency response: 18Hz~170Hz.
3.4 LPF & Subsonic Filter features
- LPF adjustable from 48Hz~220Hz with 24dB/Oct slope.
- Subsonic Filter adjustable from 14Hz~55Hz with 24dB/Oct slope.
Chart 4.LPF response
Chart 5.Subsonic Filter response
3.5 SUBSONIC LEVEL (0dB, 6dB, 12dB)
THD+N=0.17% @ 370W output power with 4ohm load.
3.7 Input level
3.8 Signal and Noise Ratio
3.9 Protect Function
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:
Limit output power while inner temperature reach 75 degree C, protect while inner temperature reach 85 degree C.
4. Low/over voltage:
Protect while power supply voltage lower than 8.6V or over 16.2V.
3.10 Idle current and Efficiency:
1. Idle current: 1.38A
2. Efficiency: 88% when THD+N=1% at 4 ohm.
This amplifier’s size is at 140mmX341mmX54mm(W,L,H).