- This amplifier board adopts a volume potentiometer with switch as its volume & Power On / Off control
- Power LED Indicator
- Supports 6V 12V 18V 24V DC power supply,
- Supports for parallel bridge (PBTL) 50W mono output (DIY soldering at back of PCB)
- Supports low-impedance speakers which compatible with most speakers in the market.
- Dual audio input option
- Operating voltage：6-25V DC
- Power supply current requirement is greater than 3A, power supply with current 4A or above recommended)
- (note: the voltage is not greater than 25 v else will damage the board)
- Speaker impedance:4-8Ω 2-4Ω(PBTL single track)
- Maximum output power：25W/4Ω(left track)+25W/4Ω(right track)
- Audio input connector: standard 3.5MM or 3Pin audio input jack
- The board use TI company TPA3118 high power amplifier IC.
- Power input connections: Screw terminal block
- Power supply using two large capacitor.
- Audio input connections: standard 3.5mm audio line input socket, or from 3 pin input audio socket (cable Optional).
- Support low impedance speaker: Wide power inout range 6-25V DC
Tip: The output power are related to audio input level, the power supply voltage/current. Different speakers have different power output impedance, please take note!
Supply voltage with stereo 2 channel output:
- 12 v
- 8 Ω speaker /12w(left channel) +12w (right channel)
- 4 Ω speaker / 20w (left channel) + 20 w (left channel)
- 15 v ^^ 8 Ω speaker / 18 + 18 w, 4 Ω speaker /greater than 22 + 22 w
- 19 v ^^ 8 Ω speaker / 25 + 25 w, 4 Ω speaker /greater than 28 + 28 w
- 22~24 v ^^ 8 Ω speaker / 28 + 28 w
Supply voltage with PBTL Mono output: (If power supply <20V recommended use 3/4Ω Speaker else >20V use 8Ω speaker )
- 12 v ^^ 3 Ω speaker /30w
- 15 v ^^ 3 Ω speaker /43w
- 19 v ^^ 3 Ω speaker /60w
- 22~24 v ^^ 8 Ω speaker /45 w
How to Bridge Output PBTL
- Disconnect soldering point of S1, Connect soldering point S2 to S6
- Connect your speaker (+) to Lout(-)
- Connect your speaker (-) to Rout (-)
Note: Please read the product introduction.You must have some knowledge of electronics, before use must first be familiar with the board's connection, Double check connection, do not over voltage, overload, short circuit, etc. may burn out key parts.
Wiring method suggestion:
Connect speaker first, audio input line, confirm the correct wiring and all connection must be fixed securely (loose cable connection likely to cause a short circuit), finally turn on the board. Do not make any cable connection / changes after power on, Switch off power if you need to do so.
The speaker output "+" "-" line is independent, not sharing common (-)