DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board

The DC12-24V TPA3116D2 is a high-performance 2.1 channel digital subwoofer amplifier board featuring the Texas Instruments TPA3116D2 Class D amplifier IC, delivering up to 2x50W stereo output plus dedicated subwoofer channel with exceptional audio fidelity and efficiency. Professional audio engineers, DIY enthusiasts, and commercial sound system integrators rely on this board to build compact, powerful speaker systems with minimal thermal dissipation and distortion. This amplifier solves the critical challenge of delivering room-filling bass response and clear midrange audio in space-constrained applications while operating efficiently from standard 12V or 24V DC power supplies.

Product Overview

The TPA3116D2 2.1 channel amplifier board utilizes Texas Instruments' advanced Class D amplification topology, which achieves superior power efficiency by switching the output transistors at high frequencies rather than operating in linear mode. This architecture delivers clean audio output with THD+N typically below 0.1% across the audio spectrum, while consuming minimal current and generating negligible heat. The board integrates a dedicated low-pass filter section for the subwoofer channel, allowing independent frequency control and volume adjustment of the bass response, enabling seamless integration with passive speaker systems or active subwoofers.

The dual voltage input design (12V to 24V DC) makes this amplifier exceptionally versatile for automotive, portable, and fixed installation applications. The board features comprehensive protection circuitry including thermal shutdown, DC offset detection, and short-circuit protection, ensuring reliable operation in demanding environments. With input sensitivity adjustment and independent channel gain controls, users can match the amplifier to various source impedances and speaker configurations without external components or complex calibration procedures.

Key Specifications

Specification	Details
Product Type	2.1 Channel Digital Class D Subwoofer Amplifier Board
Amplifier IC	Texas Instruments TPA3116D2
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Input Voltage Range	DC 12V to 24V
Stereo Output Power	2x50W at 8 Ohms (12V supply)
Subwoofer Output Power	100W at 4 Ohms (24V supply)
THD+N	Less than 0.1% at rated output
Frequency Response	20Hz to 20kHz
Input Sensitivity	0.8V to 1.2V RMS adjustable
Subwoofer Low-Pass Filter	20Hz to 200Hz adjustable cutoff
Board Dimensions	Approximately 8.5cm x 6.5cm x 2cm
Operating Temperature	-10 degrees Celsius to 50 degrees Celsius

Key Features

• TPA3116D2 Class D Amplifier IC delivering 2x50W stereo plus 100W subwoofer channel with exceptional power efficiency and minimal heat generation
• Dual voltage operation from 12V to 24V DC enables flexible integration in automotive, portable battery-powered, and fixed installation systems
• Independent subwoofer channel with adjustable low-pass filter (20Hz to 200Hz) and dedicated volume control for precise bass management
• Ultra-low THD+N below 0.1% ensures clean, distortion-free audio reproduction across the entire frequency spectrum
• Comprehensive protection circuitry including thermal shutdown at 150 degrees Celsius, DC offset detection, and short-circuit protection
• Adjustable input sensitivity and individual channel gain controls for seamless matching with various audio sources and speaker impedances
• Compact PCB design (8.5cm x 6.5cm) fits into space-constrained enclosures without compromising performance or reliability

Applications and Use Cases

• Automotive Audio Systems: Integrate into car audio setups requiring powerful subwoofer output with stereo front speakers, operating directly from 12V vehicle electrical systems
• Portable Bluetooth Speaker Systems: Combine with Class D amplifier modules and lithium battery packs to create high-power wireless speakers with extended bass response
• Home Theater Subwoofer Integration: Use as the amplification stage for DIY subwoofer projects, providing dedicated bass channel processing and volume control independent of main speakers
• Professional Event Sound Reinforcement: Deploy in compact PA systems and stage monitors where space constraints and power efficiency are critical requirements
• Industrial Audio Applications: Integrate into warning systems, public address installations, and background music systems requiring reliable, efficient amplification
• Robotics and Embedded Audio: Implement in robotic platforms and embedded systems requiring compact, low-power audio output with minimal thermal footprint

How to Use

Begin by connecting your DC power supply (12V to 24V) to the board's power input terminals, ensuring correct polarity to prevent damage to the amplifier IC. Connect your audio source (smartphone, tablet, audio interface, or preamp) to the stereo input RCA connectors, then connect your left and right speakers to the stereo output terminals and your subwoofer to the dedicated subwoofer output. Before applying power, adjust the input sensitivity potentiometer to match your source output level, typically set to 1.0V for standard line-level audio sources. Once powered on, use the subwoofer low-pass filter frequency control to set the crossover point (typically 80Hz to 120Hz for most speaker configurations) and adjust the subwoofer volume control to achieve proper bass balance with your main speakers.

For optimal performance, maintain adequate ventilation around the amplifier board, especially when operating at high output levels or with 24V supply voltage. If you experience any distortion or clipping, reduce the input sensitivity setting or lower the source output level. The board's protection circuitry will automatically shut down if the IC temperature exceeds 150 degrees Celsius, resuming operation once cooled. Always verify speaker impedance matches the board's rated output (typically 4 to 8 Ohms per channel) to prevent overload conditions. For automotive installations, use appropriate fusing on the positive power supply line and ensure proper grounding to the vehicle chassis for noise-free operation.

Frequently Asked Questions

What is the maximum output power at different supply voltages?

At 12V DC supply, the board delivers approximately 2x50W stereo output into 8 Ohm loads and 100W subwoofer output into 4 Ohm load. When powered from 24V DC, output power increases to approximately 2x100W stereo and 200W subwoofer, making it suitable for larger speaker systems and professional applications. Always verify your speaker impedance ratings to ensure safe operation within the amplifier's specifications.

Can I use this amplifier with passive subwoofers or only active subwoofers?

The TPA3116D2 board is designed to drive passive subwoofer drivers directly through its dedicated subwoofer output channel, making it ideal for DIY subwoofer enclosure projects. You can also use it with active powered subwoofers by connecting the subwoofer output to the subwoofer's line-level input, allowing you to control subwoofer volume independently from the main speakers. The adjustable low-pass filter ensures proper frequency separation regardless of your subwoofer configuration.

How do I adjust the crossover frequency for the subwoofer channel?

The board features a dedicated low-pass filter frequency adjustment potentiometer that allows you to set the subwoofer crossover point between 20Hz and 200Hz. For typical home audio applications, set the crossover between 80Hz and 120Hz to separate bass frequencies from your main speakers. Use an audio frequency generator app or test tones to identify the optimal crossover frequency for your specific speaker configuration and room acoustics.

Is this amplifier suitable for automotive 12V systems?

Yes, the TPA3116D2 board is specifically designed for 12V automotive applications and can be directly connected to vehicle electrical systems. Ensure you install a fuse (typically 20A to 30A depending on the supply wire gauge) on the positive power line within 30 centimeters of the battery to protect against short circuits. Use proper shielded audio cables and ground the amplifier chassis to the vehicle frame to minimize noise and interference from the vehicle's electrical system.

What speaker impedances does this board support?

The TPA3116D2 board is rated for 4 Ohm to 8 Ohm speaker impedances on all channels. Operating at lower impedances increases output power but also increases current draw and heat generation. Never connect speakers with impedance below 4 Ohms, as this may trigger the protection circuitry or damage the amplifier IC. Always verify your speaker impedance before connection and ensure the total impedance load does not drop below the board's minimum specifications.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

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Buy DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board Online in India

Purchase the DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.

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