The ZK-1002T+APP is a high-power, dual-channel Hi-Fi Class-D stereo power amplifier board equipped with Bluetooth 5.0 and dynamic analog tone controls. Capable of pumping out a massive 100W + 100W peak output, this upgraded model features custom mobile app integration (Wuzhi Audio App). This allows users to control EQ presets, rename the Bluetooth ID, and set custom password access codes, making it an excellent platform for DIY speaker builds, retro radio restorations, and high-performance home audio installations.

Specification

• Amplifier Architecture: Class-D Stereo (Dual TPA3116D2 based or high-efficiency variant chips)
• Output Channels: 2.0 Channel Left / Right Stereo
• Peak Power Output: 100W + 100W (at 24V rail into 4Ω load speakers)
• Input Interfaces: Bluetooth 5.0, 3.5mm AUX Line-In, USB Flash Drive playback
• App Integration: Wuzhi Audio App supported (iOS/Android compatible)
• Tone Adjustment Controls: Independent Bass knob, Treble knob, and Master Volume / Power switch
• Operating Supply Voltage (VCC): DC 9V to 24V (Minimum 3A -5A current capacity recommended)
• Compatible Speaker Impedance: 4Ω to 8Ω
• Built-in Safety Protections: Over-voltage, under-voltage, overheating, DC detection, and short-circuit protection

Features

• Dedicated Wuzhi Audio App Control: The "+APP" designation adds smart control layers. Using your smartphone, you can instantly modify the Bluetooth connection name, set up a secure pairing password to prevent neighbors from connecting, adjust digital 10-segment graphical equalizers, and switch audio inputs remotely.
• Granular Analog Treble & Bass Knobs: Outfitted with professional individual rotary potentiometers for high and low frequency contour tuning. This allows you to tailor the output to compensate for small speaker enclosures or open-air room acoustics without relying on software equalization.
• Multi-Source Input Routing Selector: Seamlessly handles diverse inputs. If a traditional 3.5mm AUX cable is plugged in, or a USB flash drive containing MP3/WAV/FLAC files is connected, the board automatically manages audio streaming priority paths.
• Class-D Thermal Efficiency: Built on high-speed switching frequencies, minimizing power lost as waste heat. It comes packed with an expansive passive aluminum block heatsink that mounts directly to the chips, ensuring stable sustained workloads without thermal throttling.

Common Applications

• Custom DIY Home Speakers: Serving as the primary internal amplifier assembly for building active bookshelf monitors or outdoor entertainment soundbars.
• Retro Audio Modernization: Retrofitting vintage wooden valve radios, analog stereo consoles, or older passive sound boxes with modern Bluetooth connectivity.
• Desktop PC Audio Stations: Acting as a compact, ultra-powerful desktop amplifier driving passive premium studio monitors from an external DAC line.
• Commercial Ambient Audio: Driving background music speaker networks in small retail shops, cafes, or workshop floors due to its secure Bluetooth password feature.

Professional Usage & Deployment Tips

• Use a Quality DC Power Source: Avoid generic, low-cost power bricks. The high current demands of a 200W peak amplifier will pull massive current loops. An unstable power supply will introduce background popping sounds, wireless dropouts, or an audible high-pitched hiss (ground loop noise). A 24V 5A regulated switching power supply is optimal for full performance.
• Match Speaker Power Specifications Safely: Pushing 100W per channel into tiny 10W or 15W speakers will quickly tear the speaker cone surrounds or overheat the voice coil. If pairing this board with lower-wattage passive drivers, restrict your maximum volume limits or reduce the incoming power rail voltage to a modest 12V -15V.
• Prevent Bluetooth Enclosure Shielding: When housing the ZK-1002T board inside an enclosure, do not use a fully enclosed solid metal or iron box. Metal shields radio waves, which will drastically cut your Bluetooth reception range to just a few feet. Opt for wood, acrylic, or 3D-printed plastic cases. If a metal frame is mandatory, ensure the front or rear panels are non-conductive to let wireless signals pass through.
• Ensure Proper Enclosure Airflow: While Class-D amplifiers run remarkably cool, sustained high-volume operations at 24V inside an air-tight chassis can still cause heat to accumulate. Ensure your custom case layout features small ventilation slots near the top and bottom of the internal heatsink block to allow natural air convection to cool the circuit components.