Main Features:
Model: DK1200 1200Wx1CH
Output circuitry:Class D
Output power(RMS,≤1% THD + N@0.5 ohms):NA
Output power(RMS,≤1% THD + N@1 ohms):1200W
Output power(RMS,≤1% THD + N@2 ohms):700W
Output power(RMS,≤1% THD + N@4 ohms):450W
Signal-to-noise (@ 1W): >90dB
Maximum power:1200W
Signal Inputs:RCA
Distortion (SMPTE-IM):NA
Amplifier Protection:YES
Input Sensitivity :0.2V-5V
Dimensions (L x W x H):261x140x54mm
TEST REPORT:
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%.
Power
THD+N |
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.
Chart 3.Frequency Response
3.4 LPF & Subsonic Filter features
- LPF adjustable from 50Hz~225Hz.
- 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
>75dB
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).
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