WALFRONT

WALFRONT ZK-TB21 200 W AV Power Amplifier(Black)

Name: WALFRONT ZK-TB21 200 W AV Power Amplifier(Black)
Brand: WALFRONT
Price: 1836.00 INR
Availability: InStock

Deal score 100/100· Excellent deal59% off MRP· Near 90-day low

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About this product

The ZK-TB21 is a high-efficiency Class-D 2.1 channel audio amplifier board powered by the TPA3116D2 chipset, designed for powerful and clear sound output. It delivers 50W × 2 stereo output with a dedicated 100W subwoofer channel, making it ideal for DIY speaker systems, home audio setups, and Bluetooth speaker projects. • Type: AV Power Amplifier • Power Source: Use Battery/SMPS , Support 12 To 24VDC 5A • Power Consumption: 200 W • W x H x D: 8 cm x 2 cm x 2 cm • Frequency Response: 20Hz – 20kHz

Specifications

General

Key highlights: Type: AV Power Amplifier · Power Source: Use Battery/SMPS , Support 12 To 24VDC 5A · Power Consumption: 200 W · W x H x D: 8 cm x 2 cm x 2 cm · Frequency Response: 20Hz – 20kHz
Additional details: Type: AV Power Amplifier | Power Source: Use Battery/SMPS , Support 12 To 24VDC 5A | Power Consumption: 200 W | W x H x D: 8 cm x 2 cm x 2 cm | Frequency Response: 20Hz – 20kHz
Amplifier Tubes: No Any Tubes Available In This Board
Auto Former: No
Balanced Input: 1
Brand: WALFRONT
Channels: 2
Circuit Configuration: Amplifier Type: Class‑D digital amplifier using TPA3116D2 IC. Efficient, low‑heat, high-output design. Channel Configuration: 2.1 channel: Left (L) channel → 50 W Right (R) channel → 50 W Subwoofer (SW) → 100 W Stereo channels drive left/right speakers; subwoofer channel drives low-frequency driver. Power Supply: DC input: 12 V – 24 V (center-positive) Connected to TPA3116D2 power pins and other supporting circuitry. Inputs: Bluetooth 5.0 module integrated on board AUX / 3.5 mm input → routed to amplifier IC through preamp stage. Tone & Control Circuits: Treble and Bass controls connected via potentiometers in the signal path. Volume control before the amplifier IC input. Output Stage: TPA3116D2 drives speaker terminals (L/R/SW) via MOSFET output stage. Includes short-circuit and over-temperature protection circuits. Protection Circuitry: Thermal shutdown Overcurrent protection Under/Over voltage protection LED Indicators: Power LED and Bluetooth status LED connected to appropriate voltage rails.
Color: Black
Controls: Controls Power ON / OFF Control Master Volume Control Bass Level Control Treble Level Control Subwoofer Level Control Bluetooth Pairing Control
Cooling: Not Available
Damping Factor: Typical ZK‑TB21 value: Around 50–100, depending on speaker and wiring.
Dynamic Headroom: 1.5 dB
Frequency Response: 20Hz – 20kHz
Illumination: Power LED: Shows when the amplifier is powered ON. Bluetooth LED: Blinks or stays solid when in pairing mode or connected. Status Indicators: Some boards have additional LEDs for signal presence or protection mode (overload, short circuit). Purpose: Helps the user know the board’s operating state at a glance.
Model Number: ZK-TB21
Net Quantity: 3
Product Id: AMRHJ5D5P9T5FDBR
Shade: White
Surround Sound Format: Supported Channels: 2.1 (Left, Right, Subwoofer) Format Compatibility: Stereo audio (2.0 / 2.1 channel) Does not support true 5.1, 7.1, or Dolby/DTS surround formats Audio sources with more than 2 channels will be downmixed to stereo + subwoofer
Technology Used: Amplifier Type: Class‑D Digital Amplifier Uses switching output stage (MOSFETs) instead of linear amplification. Chipset: TPA3116D2 from Texas Instruments Highly efficient, low heat, high-fidelity output. Audio Processing: Digital PWM (Pulse Width Modulation) amplification Preamp stage handles input signals (Bluetooth/AUX) Treble and Bass adjustments done via analog tone control circuits. Efficiency: Typical Class‑D efficiency > 90%, meaning minimal heat and less power loss.
Type: AV Power Amplifier

Additional Features

Remote: No
Foot Switch: No
Key Features: 2.1 Channel Class-D Amplifier (Stereo + Subwoofer output) High Power Output: 50W × 2 + 100W subwoofer (max) TPA3116D2 Chipset for high efficiency & low distortion Bluetooth 5.0 for stable wireless audio streaming AUX / Line-In Input for wired audio sources Bass & Treble Control Knobs for sound tuning Wide Frequency Response: 20Hz – 20kHz Supports 4Ω–8Ω Speakers DC 12V–24V Power Supply Support Low Heat Generation & Energy Efficient Design
Other Features: Not Available

Audio Features

Impedance: 4 ohm
Speaker Size: 0 inch
Speaker Type: Passive Speakers Only The amplifier provides powered output; it does not have built-in speakers. Must use external passive speakers (no internal amplification).
Master Volume: Yes
Speaker Output: 200 W
Audio Input/Output: Audio Input Bluetooth 5.0 (Wireless audio streaming) AUX / Line-In (3.5 mm jack), Audio Output 2.1 Channel Output Left Speaker Output Right Speaker Output Subwoofer Output
Harmonic Distortion: 20Hz - 20kHz
Other Audio Features: Bluetooth 5.0 Wireless Audio High-speed pairing and stable connection Compatible with smartphones, tablets, laptops AUX / 3.5 mm Wired Input Connect any standard audio source Simple plug-and-play Tone Control Adjustable Treble and Bass for audio customization Allows user to tweak sound to preference LED Indicators Power LED → indicates amplifier is ON Bluetooth LED → shows pairing/connection status Protection Features (Indirect Audio Features) Overcurrent & short-circuit protection → prevents speaker damage Thermal shutdown → prevents distortion from overheating High Efficiency & Low Heat Class‑D design ensures minimal energy loss Maintains audio clarity even at higher volumes Dynamic Headroom Can handle short audio peaks above rated power without distortion Compact DIY-Friendly Design Can be integrated into custom speaker boxes or DIY setups
Intermodulation Distortion: 20Hz - 20kHz

Body & Design Features

Front Panel: Power LED (indicates amplifier is ON) Bluetooth LED (indicates pairing/connection status)/ Controls Visible
Grill Cover: Compact PCB (Printed Circuit Board) design for DIY projects No pre-built enclosure; meant to be integrated into custom speaker boxes
Circuit Design: Clearly labeled input/output terminals for L/R/Subwoofer Tone control potentiometers (Treble/Bass/Volume) on board Compact layout ensures minimal signal interference
Cabinet Material: Not Available
Meter Light Switch: Yes
Other Body and Design Features: Easy to integrate into custom audio systems Lightweight and portable for small speaker enclosures

Connectivity Features

USB Port: No
VGA Port: No
HDMI Port: No
Compatible With: Audio Sources: Smartphones (Android/iOS) via Bluetooth 5.0 Tablets, laptops, or PCs via Bluetooth or AUX input MP3 players or any device with a 3.5 mm audio output Speakers: Passive speakers only (no built-in amplification) Left/Right channels: 4 Ω – 8 Ω full-range speakers Subwoofer channel: 4 Ω – 8 Ω dedicated subwoofer Power Supply: Compatible with 12 V – 24 V DC power adapters Must provide sufficient current (~5 A or higher recommended) DIY & Audio Projects: Compatible with custom speaker boxes Desktop or home audio setups Small 2.1 channel stereo systems
USB Port Features: You Can Include Additional USB Port
Other Connectivity Features: This Board Have 3.5mm Audio Jack
Wireless Network Connectivity: Yes

Dimensions

Depth: 2 cm
Width: 8 cm
Height: 2 cm
Weight: 0.3 kg
Other Dimensions: PCB Size (Typical): ~120 mm × 70 mm × 25 mm (Length × Width × Height) Height includes: TPA3116D2 chip, capacitors, and potentiometers Weight: ~150–200 g Mounting Holes: Pre-drilled on PCB for easy installation in DIY enclosures

In the Box

Sales Package: 1 × ZK-TB21 2.1 Channel Class-D Amplifier Board Pre-installed Bluetooth module On-board Bass & Treble control knobs, 1 Set Screwdriver, 1 Set DC Connector

Power Features

Power Source: Use Battery/SMPS , Support 12 To 24VDC 5A
Power Output RMS: 200 W
Power Consumption: 200 W
Power Requirement: 12 TO 24VDC 50Hz
Other Power Features: Also You Use Car Battery, Bike Battery/ SMPS

Video Features

HDMI Upscaling: No
Video Processor: Not Include
HDMI 3D Passthrough: No
Other Video Features: Not Available
Component Upconversion: No

WALFRONT ZK-TB21 200 W AV Power Amplifier(Black)

Kaisa community rating

90-day price history

About this product

Specifications

General

Additional Features

Audio Features

Body & Design Features

Connectivity Features

Dimensions

In the Box

Power Features

Video Features

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