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CA-3169B Subwoofer Amplifier Audio Board 2.1 HiFi Amplificador USB Amp Bluetooth 5.0
Product Overview
Professional 2.1 channel subwoofer amplifier board featuring Bluetooth 5.0 connectivity, USB input, and high-performance TI TPA3116D2 digital power amplifier chips. Designed for superior audio performance in various applications.
Key Features
DC-powered operation (12-24V) with TI TPA3116D2 digital power amplifier chips
Bluetooth 5.0 audio reception with external audio input interface
Built-in preamplifier with bass crossover processing
Multiple control potentiometers: bass volume, bass frequency, channel volume, treble, function switch
High efficiency design (up to 90%) with wide voltage compatibility
Pre-soldered and tested finished board ready for installation
Technical Specifications
Parameter
Specification
Dimensions
101 × 100 × 25 mm (excluding potentiometer and socket projection)
Operating Voltage
DC 12-25V (recommended DC24V 4A)
Maximum DC Voltage
25.5V (no-load)
Bluetooth Range
> 8 meters
Audio Input Sensitivity
600-800mV
Frequency Response
20Hz-20KHz
Subwoofer Cut-off Frequency
26-160Hz
Speaker Impedance
Left/Right: 4-8 ohm | Subwoofer: 2-8 ohm
Function Switch Instructions (Bluetooth Version)
Default mode: Bluetooth when power is connected
Bluetooth disconnected: Long press switch to switch to audio input mode
Bluetooth playing: Short press switch to pause/play
Package Includes: 1 × TPA3116 Power Amplifier Board
Troubleshooting & FAQs
Amplifier board has current sound and noise during use
Common causes: Poor power supply filtering, poor input signal quality, low-quality input cables, improper wiring connections, or shared power supply with other devices causing interference.
No sound output or no sound in one channel
Check: Speaker functionality, speaker cable connections, input cable quality and connections, proper output from connected input devices.
Volume broken and breaking sound when turned loud
Possible causes: Insufficient power input, poor speaker performance or damage, incorrect speaker power rating, or improper channel connections.
Speaker broken sound when subwoofer volume turned loud
Check: Power supply adequacy, speaker power rating compatibility, speaker bass performance quality, and speaker box structure.
Volume power not sufficient
Power output depends on: Power supply voltage, sound source signal amplitude, and speaker impedance. Any deficiency in these areas will affect performance.
Will the amplifier be damaged?
Risk factors: Reverse power supply polarity, excessive voltage beyond operating limits, direct AC transformer connection (requires DC conversion), incorrect wiring connections, or short circuits.
Note: Output power is related to supply voltage/current, speaker impedance, and audio input size. Higher voltage with sufficient current typically provides greater output power. Lower speaker impedance generally allows easier power achievement.
