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The TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board is a high-performance Class-D audio amplifier engineered to drive complete 2.1 speaker arrangements from a single compact PCB. By incorporating two independent Texas Instruments TPA3116D2 bridge-tied load (BTL) amplifier ICs, this board separates audio processing cleanly: one chip handles the high- and mid-range stereo channels (Left & Right), while the second chip works in a parallel BTL configuration to drive a dedicated heavy-duty passive subwoofer.

Operating with over 90% power efficiency, Class-D architecture minimizes thermal dissipation, allowing the pre-fitted aluminum heatsinks to maintain cool operations even under high output loads. The board features an onboard NE5532 low-pass filter operational amplifier, allowing users to fine-tune the subwoofer cutoff frequency and gain. Inputs can be fed through either a standard 3.5mm AUX jack or a 3-pin audio header, feeding output directly through heavy-duty screw terminals for secure speaker wire connections.

Key Features and Benefits

• Powerful 2.1 Channel Configuration: Delivers 50W to the left satellite speaker, 50W to the right satellite speaker, and a massive 100W output to a dedicated subwoofer.

• Dual TPA3116D2 Chipset Efficiency: Advanced Class-D design delivers crystal-clear acoustics and heavy bass with minimal heat generation and low power consumption.

• Integrated Subwoofer Low-Pass Filter: Onboard NE5532 op-amp allows smooth tuning of subwoofer crossover frequencies (20 Hz - 250 Hz) to match various woofer sizes.

• Flexible DC Input Power Supply: Compatible with a wide power range from 12V DC up to 24V DC (ideal for battery-powered boomboxes or laptop power adapters).

• Onboard Potentiometer Tuning: Features 5 precision rotary controls for Subwoofer Volume, Subwoofer Frequency Cutoff, Left/Right Channel Volume, Treble Tone control, and Overall Master Volume.

Technical Specifications

How to Wire & Configure

1. Power Supply Connection:

• Connect a regulated DC power source (12V to 24V) to the VCC (+) and GND (-) screw terminals.

• Note: For maximum 200W output power, use a 24V DC switching power supply rated for 6A to 10A. Using a 12V power source will safely run the board but yield lower maximum volume.

2. Audio Input Setup:

• Connect your audio source (smartphone, Bluetooth receiver board, or DAC) using either the onboard 3.5mm AUX socket or the 3-pin audio input header (L-GND-R).

3. Speaker Terminal Wiring:

• L+ / L-: Wire to your Left satellite speaker (4 Ω - 8 Ω).

• R+ / R-: Wire to your Right satellite speaker (4Ω - 8 Ω).

• Sub+ / Sub-: Wire to your Passive Subwoofer speaker (2Ω - 8Ω).

Applications

• DIY 2.1 Bluetooth Boomboxes: Build high-power portable party speakers paired with an external Bluetooth audio receiver module.

• Desktop Multimedia Audio Upgrade: Drives high-fidelity computer speakers alongside an under-desk subwoofer enclosure.

• Custom Home Theater System: Replaces or upgrades internal amplifier units in active 2.1 home theater speaker sets.

• Automotive Audio Modification: Can be powered directly from $12 ext{V}$ vehicle power grids to add custom subwoofers and speakers to cars or campers.

Package Includes

• 1 x TPA3116D2 2.1 Channel 200W Digital Subwoofer Power Amplifier Board

• 5 x Potentiometer Adjustment Knobs

• 5 x Mounting Nuts and Washers

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Secure packaging to ensure safe transit of electronic components