Placa amplificadora Bluetooth de 2.1 canales ZK-MT21 – Mini amplificador de audio de 12V-24V con salida de subwoofer, control de agudos de graves 50W+50W +100W- amplificador de TV doméstico HiFi DIY para altavoces pasivos

Descripción

Product description Domestic Hifi Chip This Bluetooth amplifier board features a HiFi power amplifier chip that delivers up to 50W per channel. Large Heat Sink The large heatsink quickly dissipates heat, allowing the chip to deliver sustained high power without risk of damage. Premium Wiring Terminals Wiring is quick and hassle-free, with no damage to the wires. The 5.5mm x 2.1mm DC input accepts most laptop power adapters. Treble, Bass & Sub Control Endless sound possibilities. Experience a mini movie theater at home — all from a tiny amp. Product name 2.1 channel Bluetooth audio amplifier module Product model ZK-MT21 Bluetooth version 5.0 (unobstructed, 10 meters) Input sensitivity 500mV Input method AUX + Bluetooth Number of channels 2.1 channels Power amplifier chip Domestic power amplifier chip Adapted power supply DC 12-24V/5A or above (the higher the voltage, the greater the output power) Adapted speaker 20-100W, 4-8Ω Output power Left and right channels ≤ 50W ,Subwoofer ≤ 100W Protection mechanism Overvoltage, undervoltage, overheating, short circuit protection Product size 3.66 in × 3.54 in × 0.87 in /93mm * 90mm * 22mm Product weight approximately 6.53oz/185g (including packaging) How to choose a power supply? Use a low-ripple power supply. High ripple causes noise/malfunction. Higher voltage/current = more power. 12V1A for 3-4" speakers; 19V5A+ for 8-10". Low voltage distorts; low current drops voltage or degrades sound. Introduction to audio input modes Two inputs: Bluetooth (priority) and AUX. Bluetooth auto-reconnects once connected. No Bluetooth connection? Insert AUX for AUX mode. Note: Before using AUX, ensure Bluetooth is disconnected How to adjust the main volume? The main volume knob is used to adjust the main volume. The main volume increases when turning right, and decreases when turning left. The main volume has an impact on the volume of both the left and right channels and the subwoofer. It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of cloudy sound? The sound is distorted. Please reduce the total volume or switch to a higher voltage adapter power supply. It’s okay if the sound is low, but when the sound becomes louder, there is a phenomenon of sound lag? Insufficient input power triggers intermittent supply shutdown. Replace with a higher-power supply. Or excessive power overheats the board, causing thermal protection. Reduce power or improve cooling. Product Comparison Charts ZK-MT21 Add to Cart YS-S350H Add to Cart ZK-TB21 Add to Cart ZK-1002T Add to Cart Customer Reviews 4.5 out of 5 stars 44 4.2 out of 5 stars 7 4.0 out of 5 stars 10 — Price $15.80$15.80 $38.40$38.40 $18.99$18.99 $19.99$19.99 2.1 Channels ✔ ✔ ✔ ✘ Amplifier Chip Domestic power amplifier chip TPA3255 TPA3116D2 TPA3116D2 Input Method BT/AUX BT/AUX/USB BT/AUX BT/AUX Bluetooth Version 5.0 5.1 5.0 5.0 Adapted Power Supply DC 12-24V/5A or above DC 18-38V/10A silent below 18V DC 12-24V/5A or above DC 12-24V/5A or above Output Power 50W+50W+100W 220W+220W+350W 50W+50W+100W 100W+100W Adapted Speaker 20-100W,4-8ohm 20-300W，4-8ohm 20-100W,4-8ohm 20-200W,4-8ohm Input Sensitivity 500mV 500mV 500mV 500mV Product Size 3.7*3.5*0.9inch 5.2*5.1*1.0inch 4.7*3.9*0.8inch 4.3X2.8X0.83inch

Características

• 【Big Power in Tiny Size】Drives left/right speakers (≤50W each, 4-8Ω) plus subwoofer (≤100W). Perfect for bookshelf speakers, TV soundbars, or DIY boomboxes.
• 【Dual Input Modes – Bluetooth & AUX】 Stream wirelessly via Bluetooth 5.0 (up to 33ft) or connect any device using the 3.5mm AUX input. Works with phones, TVs, computers, and more.
• 【More Power with 24V Supply】 Runs on DC 12V-24V / 5A or above (power supply NOT included). Higher voltage = bigger sound. Users say 24V makes it "room-shaking."
• 【Full Tone Control Knobs】 Separate controls for master volume, sub level, sub frequency (20-200Hz), plus bass and treble for left/right channels. Fine-tune your perfect sound.
• 【Easy DIY Assembly】Comes with top/bottom covers, 8 small screws, 5 knob caps, and a screwdriver. Barely gets warm even after hours of use. Great for reviving old speakers.

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