CX3500.1 ClassD 3500Wx1CH



Main Features:
Model:CX3500   3500Wx1CH
Output circuitry:Class D
Output power(RMS,≤1% THD + N@0.5 ohms):3500W
Output power(RMS,≤1% THD + N@1 ohms):2200W
Output power(RMS,≤1% THD + N@2 ohms):1400W
Output power(RMS,≤1% THD + N@4 ohms):800W
Signal-to-noise (@ 1W): >90dB
Maximum power:3500W
Signal Inputs:RCA
Distortion (SMPTE-IM):NA
Amplifier Protection:YES
Input Sensitivity :0.2V-5V
Dimensions (L x W x H):53x228x566mm


3500W RMS Class-D amplifier.
0.5 ohm load stable.
Double Side PCB and SMD components.
Adjustable Input level, LPF, Subsonic, bass boost function, Q control.
Advanced short circuit, overload, over heat, over and low voltage protection.
Advanced clip limit / thermal power limit function.
Easy bridgeable with same amplifier.
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 (0.5ohm) RMS power (1ohm) RMS power(2ohm) RMS power(4ohm)
5% 3380W 2350W 1380W 750W
3% 3300W 2250W 1330W 720W
2% 3180W 2150W 1300W 700W
1% 3180W(2%) 1900W 1150W 550W
Table 1Output Power with THD+N

Following chart shows the output power with THD+N curve at 4ohm, 2ohm loads, 1ohm loads and 0.5ohm loads.
  Chart1. RMS output power @4ohm with THD+N
Chart2. RMS output power @2ohm with THD+N
  Chart3. RMS output power @1ohm with THD+N
Chart4. RMS power @0.5ohm 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

  1. LPF adjustable from 55Hz~225Hz with 24dB/Oct slope.
  2. Subsonic Filter adjustable from 15Hz~52with 24dB/Oct slope.

Chart 1.LPF response

Chart 2.Subsonic Filter response

3.5 Bass Boost Feature

Bass boost center frequency adjustable from 32Hz~90Hz, level adjustable from 0~12dB.

Chart 3.Bass boost frequency adjust(bass boost level set @ 12dB)


Chart 4.Bass boost level adjust (bass boost frequency set at 48Hz)

3.6 Bass boost Q control


THD+N=0.10% @ 20W output power with 4ohm load.

1.2Input level


1.3Signal and Noise Ratio


1.4Protect Function

1. Overload:

 Protect less than 0.44 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 voltage:

Protect while power supply voltage lower than 8.6V.

5. over voltage:

Protect while power supply voltage over 16.5V.

6. Power limit / Clip limit.

Clip limit while THD+N≥1%.
Power limit while inner temperature over 75 degree C.

1.5Idle current and Efficiency:

  1. Idle current: 1.90A
  2. Efficiency:  88% when THD+N=1% at 4 ohm.


This amplifier’s size is at 228mmX502mmX52mm(W,L,H).