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Description
This is a 4x100W audio amplifier board with Audio B plus Bluetooth module. It has integrated 2xST high performance TDA7498 chip which supports dual channel audio amplification.
Each channel is capable of giving nominal power output simultaneously and continuously. This board can be powered by any DC 14V-39V* power supply.
Power input port can be power jack or screw terminal. The DC input jack is 2.5mm with positive core polarity and if you use screw terminal, please pay attention to the polarity! Wrong polarity will blow up your board.
It has a smart cooling system, however, the fan does not operate in normal condition to reduce the noise.
The fan only starts when the chip temperature exceeds 65°C. Once the temperature goes down, the fan stop running.
It is perfect for your Hi-Fi audio application, the audio source can be an RCA input or Bluetooth. It is compatible with all the Bluetooth devices that support media audio including iPhone and Android. Let your smartphone pair up with this board and play a piece of music.
- MUTE: Connect MUTE pin to GND pin. The amplifier board will go into mute state.
- STBY: Connect STBY pin to GND pin. The amplifier board will go into standby state to save the board power.
-
B/A: Connect B/A pin to GND pin. The Bluetooth input will always be the audio source no matter which audio source is selected by the switch position.
Note: We have tested it. It also works well with 12VDC power also, but, we suggest you to use DC 14V-39V power if possible.
Specification:
Following table lists all typical data of the amplifier board. For full specification, please refer to the data sheet of ST’s TDA7498 chip.
TA = 25 °C, fIN = 1 kHz sine wave, RL= 6Ω, VCC = 36V. (Unless otherwise stated)
|
Parameter |
Condition |
Min |
Typ |
Max |
|
Supply Voltage (v) |
- |
14 |
36 |
40 |
|
Quiescent Current (mA) |
FAN ON,STBY Disable |
- |
90 |
- |
|
FAN ON,STBY Enable |
- |
50 |
- |
|
|
FAN OFF,STBY Disable |
- |
40 |
|
|
|
FAN OFF,STBY Enable |
|
10 |
|
|
|
Input Sensitivity (mV) |
25.6dB |
- |
1356 |
- |
|
31.6dB |
696 |
|||
|
35.1dB |
460 |
|||
|
37.6dB |
341 |
|||
|
Input Impedance (Kohm) |
- |
48 |
60 |
- |
|
Gain (dB) |
GAIN0 = L, GAIN1 = L |
24.6 |
25.6 |
26.6 |
|
GAIN0 = L, GAIN1 = H |
30.6 |
31.6 |
32.6 |
|
|
GAIN0 = H, GAIN1 = L |
34.1 |
35.1 |
36.1 |
|
|
GAIN0 = H, GAIN1 = H |
36.6 |
37.6 |
38.6 |
|
|
Output Power (W rms) |
THD = 10% |
- |
100 |
- |
|
Efficiency (%) |
Both channels output rating power. |
- |
>90 |
- |
|
Minimum Load (ohm) |
- |
- |
6 |
- |
|
Frequency Response (dB) |
±3dB |
20 |
- |
22k |
|
Operating Temperature (℃) |
- |
0 |
20 |
50 |
Features:
- Size: 15.5cm x 11cm
- Comes with a smart cooling system
- Bluetooth 4.0
- External mute control port
- External Bluetooth/LINE IN control port
- Working voltage: DC 14V-39V
- Over/under voltage protection
- Over current protection
- Over temperature protection
Applications:
- Personal computer
- Background music system
- Musical instrument amplifiers
- Home DIY
- Car audio
Documents:
Shipping & Return
SHIPPING
Our default shipping method is Registered International Post with a tracking code. Alternatively, you may opt for express shipping via DHL or FedEx.
Please note that we endeavor to ship all orders within 24 to 48 hours. The typical delivery time frame ranges between 2 to 4 weeks.
Kindly be aware that unforeseen circumstances, including customs or postal delays, may occasionally affect delivery times beyond our control.
Customers are responsible for any customs charges and should verify their country's customs policy.
RETURNS
If you are dissatisfied with the product, you may initiate a return within one month from the date of delivery. Please ensure that the product is sent back to our address in Sydney, Australia. Kindly note that all shipping charges associated with the return are the responsibility of the customer.
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