Power amplifier là gì

Specifications: Get great sound on move with this hi-fi amplifier, which is also a great option for connection to your home audio system or compatible device. Power switch with LED display, triple acoustics pattern conversion, input and output wire and volume control. Mini size easy to installation by DIY, especially good fit for car, motor bike ,computer speaker and other home audio DIY. Type: Audio Amplifier Material: Metal + Plastics SNR: 90db Frequency Response: 20-20khz Degree of Distortion: 0.02(1khz) Output Power: 500W x 2CH at 14.4VDC Input Supply Voltage: 9-15VDC Impedance: 4-16Ω Size: 11cm x 8cm x 4cm/4.33" x 3.15" x 1.57" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Audio Amplifier 1 x Power Line(42cm) 1 x Loudspeaker Wire(

Description: Built-in intelligent microphone for excellent sound quality. Play music from USB disk and TF Card, TF Card reader. Listen to your favourite tunes via USB as well as AUX input. Wide power supply suitable for variety of cars. Charge your devices while on the go with dual USB ports. Specification: Material: Plastic Size: Approx.115x65x46mm/4.53x2.56x1.81 Inch Package Includes: 1 Piece Bluetooth Amplifier. 1 Piece Audio USB Cable. 1 Piece Remote Control Unit. 1 Piece Power line Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the model and size before making payment. If there any question, please contact us, thank

Colour: black Material: plastic Package Contents: 1 x Digital Amplifier Stereo BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

Product name: NS4110B stereo 2.0 power amplifier board Output power: 2x20W Power supply voltage: DC12-18V Supply current: 3A or more Output impedance: 4-8 ohm Channel: 2.0 channel /stereo Voltage and power settings: Working voltage range: DC12V-18V Colour:green Material:plastic Package Contents: 1 * Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

This ultra-small mono amplifier is incredibly powerful - able to deliver up to 2.5 Watts into a 4-8 ohm impedance speaker. Inside the miniature chip is a class D controller, which can run from 2.0V-5.5VDC. Since the amp is Type D it's very efficient (90% more efficient when driving an 8Ω speaker at more than half a Watt) - making it perfect for portable and battery-powered projects. It has built-in overheating and overcurrent protection but we could barely tell if it was hot. There's even a fader pot so you can adjust the volume on the panel down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps! CJMCU The amplifier's A + and A- inputs pass through the 1.0uF capacitors, so they're purely 'differential' - if you don't have a differential output, just tie the Audio pin to ground. The output is "Bridge Tied" - it means that the output pins connect directly to the speaker pins, not to ground. The output is a 250KHz high frequency square wave PWM which is then 'averageed out' by the speaker coil - the high frequencies are not heard. All of the above means that you cannot connect the output to another amplifier, it has to drive the speakers directly. CJMCU Comes with a fully assembled and tested breakout board. We also include a connector for plugging it into the circuit board and a 3.5mm screw terminal block so you can easily attach / remove your speakers. You'll be ready to play in 15 minutes! Speaker not included, use any 4 ohm or more impedance speakers. Output Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with Power Supply 5.5V 50dB PSRR at 1KHz Filterless design, with ferrite beads + capacitors on the output. Fixed 24dB gain, onboard cut-off potentiometer to adjust input volume. Thermal protection and short circuit / over current Low current: 4mA static and 1uA in off

2X15W Digital Audio Stereo Amplifier Module Board TPA3110 12V Class D Power AMP Board Feature: 1. The 2.0 channel 2*15W high power mini digital power amplifier board adopts TPA3110 power amplifier chip. 2. The chip does not need heat sink, but also has the function of overcurrent and overheating. 3. This power amplifier board is designed by the improvement of the official standard circuit. 4. It increases the power supply protection against reverse protection and 2 new design low pass filtering, and the bass thrust is stronger. 5. This product has no interference and no need for shielding treatment. Specification: Power amplifier chip: TPA3110 Output power: 15W*2 Working voltage: DC DC12V-24V Working current: static: 8MA; maximum: 3A Efficiency: ≥90% Signal to noise ratio: 100dB Frequency range: 20Hz-20KHz Trumpet: 4-8ohm Product use: audio power amplification Product size: 35mm*25mm*3mm/1.37*0.98*0.11'' Product weight: 5g Package size: 77mm*60mm*3mm/3.03*2.36*0.11'' Packing weight: 6g Note: Please allow slight size differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your unders

Product name: NS4110B stereo 2.0 power amplifier board Output power: 2x20W Power supply voltage: DC12-18V Supply current: 3A or more Output impedance: 4-8 ohm Channel: 2.0 channel /stereo Voltage and power settings: Working voltage range: DC12V-18V Colour:green Material:plastic Package Contents: 1 * Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

Thời gian giao hàng dự kiến cho sản phẩm này là từ 7-9 ngày Mô tả sản phẩm: Bộ chia HDMI 1x2 cung cấp giải pháp video HD cho siêu thị, trung tâm mua sắm, HDTV, STB, DVD, nhà máy chiếu, trung tâm điều khiển dữ liệu, phân phối thông tin, thuyết trình phòng hội thảo, giáo dục và đào tạo, phòng trưng bày của công ty, rạp hát tại nhà và v.v Đặc điểm sản phẩm: Một tín hiệu đầu vào HDMI được chia thành hai thiết bị chìm HDMI Hỗ trợ Full HD, Full 3D Hỗ trợ lên tới 1080P / 60Hz Hỗ trợ CEC Hỗ trợ màu đậm 30 bit, 36 bit Hỗ trợ Blue-Ray 24/50 / 60fs / HD-DVD / xvYCC Định dạng âm thanh kỹ thuật số, như DTS-HD / Dolby-trueHD / DTS / Dolby-AC3 / DSD / HD (HBR) Hỗ trợ kiểm tra lại tín hiệu Hỗ trợ đầu vào lên đến 15metres AWG26, chiều dài cáp tiêu chuẩn HDMI, đầu ra lên đến 20metres chiều dài cáp AWG26 Không giảm chất lượng Chi tiết sản phẩm: Phiên bản HDMI: HDMI 1.4a Độ phân giải HDMI: LÊN TỚI 1920 * 1080 / 60Hz Hỗ trợ định dạng màu video: 24 bit / màu sâu 30 bit, 36 bit Hỗ trợ định dạng âm thanh: DTS-HD / Dolby-trueHD / DTS / Dolby-AC3 / DSD HD (HBR) Băng thông tối đa: 225 MHz Tốc độ truyền tối đa: 2,25Gbps Tín hiệu TMDS đầu vào / đầu ra: 0,5 ~ 1,5Volts p-p (TTL) Tín hiệu DDC đầu vào / đầu ra: 5Volts p-p (TTL) Khoảng cách cáp đầu vào: 15m cáp tiêu chuẩn HDMI AWG26 Khoảng cách cáp đầu ra: 20m cáp chuẩn AWG26 HDMI Dòng điện làm việc tối đa: 350mA Phạm vi nhiệt độ hoạt động: (- 15 đến +55) Phạm vi độ ẩm hoạt động: 5 đến 90% rh (Không ngưng tụ) Kích thước (Chiều dài x Chiều rộng x Chiều cao): 62x51x11mm Gói hàng bao gồm: 1 * Bộ chia HDMI 1x2 1 * Dây cáp nguồ

♥♥Welcome everybody to our store Petersburg.id!!! Here you can loving sports and being healthy, so you just enjoy shopping!!! Specifications: 1. Power supply: dual DC power supply ± 58-± 70V 2. The rated output power: 500W (± 65V power supply, 4 ohm load, distortion 10%) 3. Efficiency: = 90% 4. SNR: 90dB 5. The total harmonic distortion: 380W (± 65 power 4 ohm speaker, distortion 0.1%) 280W (± 65 power 8 ohm speaker, distortion 0.1%) 6. Frequency range: 20Hz-20KHz 7. Speaker: 4-8ohm 8. Voltage Magnification: 36 times 9. Input sensitivity 1.5V (RMS) 10. Output short circuit protection: Yes 11. That output DC bias protection speaker protection: Yes 12. Over-temperature protection: Yes, radiator FET temperature higher than 100 ° C, turn off the output! 13. Product Size: approx. 100*50*30mm/3.93*1.96*1.18'' 14. Net weight: approx.100g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 1 x Digital Amplifier M

Package Included: 1 x Power Amplifier 1 x Remote control 1*User Manual (Note: this price dont include power supply) Specifications: Amplifier type: hi-fi power amplifier -Colour ：black -Size: 155x85x4 5mm / 6.1inx3.3inx1.7in -Nominal voltage: 12V -RMS power: 40W + 40W -Max power: 400W + 400W -Nominal Frequency: 20-20KHz -Resolution: 47K -Distortion: 0.1 -SNR: 90dB -Impedance: 4-16 Ω -Power amplifier type: hi-fi amplifier -Material: aluminum -Interface type: clip -Receive mode; audio input Weight: 0.35 (kg) Description: Characteristics: -Mini HIFI digital bluetooth audio power amplifier. -Aluminum alloy body, durable, the body is made of aluminum alloy once, the anode surface treatment, the overall atmosphere, thick, feeling is also very good. -For SD Card, U disk, AUX input, MP3 format playback, support bluetooth wireless connection. Supports FM stereo radio. -Low distortion provides clearer, stronger and more powerful sound. -With remote func

Features: Amplifier B Board This is a 12V single power supply TDA7297 amplifier board B board, AC / DC, 2.0 / dual channel / stereo, 12V/2A when using, the output power of 15W +15 W, peak up 25W +25 W. Compact and Portable 10-50W speakers, a large volume of small size, high signal to noise ratio. Upgraded version of the radiator, wider and thicker, better cooling effects. High Fidelity No impact on current, high fidelity, no static noise. Small volume but strong power. There is no noise at all with 12V/5A or above 12V/50W transformer. Easy to Install The circuit board has a terminal which can be screwed by a screwdriver, quickly connect the wire. Specifications: Type: Amplifier AMP Module Material: Metal Color: As shown Quantity: 1pc Power: 15w+15w Working voltage: DC 9-15V Maximum power: 30w+30w Output Impedance: 4-8 Omega; Size: 5*4.2*4cm/1.96*1.65*1.57in Weight: 50g/1.76oz Package: 1* Amplifier AMP M

Description: With short-circuit protection, overheating protection and over-voltage protection, the power amplifier board is safe to use. Adopting TPA3116D2 chip, the power amplifier board can provide you with high fidelity and good sound quality. Made of high-quality PCB material, the power amplifier board is durable, sturdy, and reliable for long-time use. The length of the item is approx 7.9cm, the width is approx 5.4cm, and its thickness is approx 1.6cm. It is suitable for home audio systems, active speaker applications, and so on. Item Name: Digital Amplifier Board Material:PCB Supply Voltage: DC12-26V Output Power: Maximum 100W Chip: TPA3116D2 Input Current: above 3A Signal to Noise Ratio: 100DB Vocal Tract System: Mono Channel Size:7.9cmx5.4cmx1.6cm/3.11inx2.13inx0.63in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 1 X Digital Amplifier B

Description: Adopting TPA3116D2 chip and dual channel stereo system, the power amplifier board can provide you with high fidelity and good sound quality. The power amplifier board is safe to use as it has short-circuit protection, overheating protection and over-voltage protection. Made of high-quality PCB material, the power amplifier board is durable, sturdy, and reliable for long-time use. The length of the item is approx 6.4cm, the width is approx 5cm, and its thickness is approx 2.3cm. It is suitable for home audio systems, active speaker applications, and so on. Item Name: Digital Amplifier Board Material:PCB Input Voltage: DC10-25V Output Power: Maximum 2x50W Output Impedance: 4-8Ω Frequency Response: 20Hz-20KHz Chip: TPA3116D2 Vocal Tract System: Two-channel Stereo Protective Function: Short Circuit Protection, Overheat Protection, Anti-reverse Connection of Power Supply Switching Frequency: 1.2MHz Size:6.4cmx5cmx2.3cm/2.52inx1.97inx0.91in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 1 X Digital Amplifier B

Description: With switch volume adjustment and solid state filter capacitance, the power amplifier board is reliable to use. Due to short-circuit protection, overheating protection and over-voltage protection, the power amplifier board is safe to use. Made of high-quality PCB material, the power amplifier board is durable and sturdy for long-time use. The length of the item is approx 2.95cm, the width is approx 2.02cm, and its thickness is approx 1.5cm. It is suitable for home audio systems, active speaker applications, as well as other music equipment. Item Name: Digital Amplifier Board Material:PCB Supply Voltage: DC 5V Output Power: Minimum 2x3W Model: GF1002 Size:2.95cmx2.02cmx1.5cm/1.16inx0.8inx0.59in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension differences due to different manual measurements. Package Includes: 5 X Digital Amplifier Bo

Product Description: 100% Brand New and High Quality High-quality stereo lossless Bluetooth module plus amplifier with noise reduction to extreme low. 2.1-channel, personalized DIY active amplifier, bass is more powerful and powerful, satisfying your critical hearing... The TPA3110D2-Q1 is a 15W (per channel), high-efficiency, Class-D audio power amplifier designed to drive bridged stereo speakers. The bass unit uses an enthusiast NE5532 op amp. Speaker 4~8Ω, power supply DC8V-20V. Current is recommended 3A or more. Advanced electromagnetic interference (EMI) Electromagnetic Compatibility (EMC). SpeakerGuard Protection Circuit System DC detection circuit and output stage protection. The TPA3110D2 can drive stereo speakers as low as 4Ω. More than 90% efficient when playing music The output is fully protected against short circuit to GND, VCC and output to output Both short-circuit protection and thermal protection include automatic recovery. Bluetooth KRC-86B V4.0, CSR8630 Chip. Total Size: 76*56.2*16.5mm (L*W*H) Package Included: 1 x TPA3110D2 2.1CH Audio Amplifier

1. No annoying sounds such as power-on, song cut, and pause; 2. Wide power supply voltage: DC4.5-27V; 3. Two audio input es: Bluetooth e and headset (LINE IN) e; 4. Two power supply interfaces: terminal block and DC2.1MM socket (compatible with most laptop power interfaces); 5. Power input anti-reverse function; acrylic shell protection Product name: Bluetooth digital power amplifier board Product el: XY-502B Power supply voltage: DC4.5-27V Output power: 50W*2 Protection function: reverse connection, overvoltage, undervoltage, overheating, short circuit SNR: 102db Number of channels: two-channel stereo Product weight 187g (with shell) size:87 x 53 x 29mm Material:ABS+metal colour:blue Package Contents: 1 x Power Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

Product Name: power amplifier template Specification: OEP30W power amplifier Working mode: D class (PWM modulation) Number of vocal tract: double channel Power supply range: DC:7.5-24V Size: 18*18*3mm Packing:

High efficiency,wide frequency Give you a wonderful in-car entertainment. With current protection,overload protection,short circuit protection Durable in use Amplifier use:car audio system/subwoofer speaker Colour:Black Material:metal +electronic components Name:Amplifier Board Voltage:12 V Current:80A Maximum power:1200 W Rated power:120W Impedance:4Omega Frequency:20Hz-250Hz Signal to noise ratio:89db Package Contents: 1 x Car Audio Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

12V 1000W Car Audio High Power Amplifier Amp Board Powerful Subwoofer Bass Amp Features: -- Current Overload, Short Circuits, Thermal Overload, DC Offset. -- Mono 1000 Watts Car Audio Amplifier gives you a wonderful in-car entertainment. -- High power, good sound quality, no distortion, give you a great hearing enjoyment. -- Light weight, handy and easy to install. -- Powerful bass. Specification: Model: PA-80D Product Name: Car Amplifier Subwoofer Type: Subwoofer Speaker Color: Black Material: Aluminum alloy Channels: 1-Channel Operating Voltage: 12V Sensitivity: 200mv-8v Frequency Response: 10-30kHz Max Power: 1000W Impedance: 4-8 Ω SNR: 105dBA THD: ＜0.1% Size: 23.3x15.5cm/9.17x6.1" Package Included: 1 x Car Audio Amplifier Board Wiring: 1. Speaker connection: amplifier board has a good piece of red and black wire welding can be accessed by a 4-8 Euro 100-150W bass or full-range speaker or speakers (red pick horn + , black pick speaker - is recommended to use 4 ohm 8-12 inch 45 core 100-170 magnetic bass ) ; 2. Power connection A. Car has a CD player : GND then negative vehicle power ; 12V 12V power supply connected to the car 's positive ; REM CD player connected to the control line (so the CD player can directly control the subwoofer amplifier on and off ) B. Car no CD player : GND connected to the negative power of the car , + 12V and REM connected together in positive 12V car power ( + 12V can also be an indirect one with REM switch control amplifier switching function ) ; C. Directly with the battery (battery) connection : GND connect the battery negative , + 12V and 12V REM then the positive battery simultaneously . Note: 1. Please allow 0.5-1cm differences due to manual measurement. 2. Due to the light and screen difference, the item's color may be slightly different from the pict

Product name: Bluetooth power amplifier board Power amplifier chip: TPA3118 Power amplifier category: Class D power amplifier Channel: Mono Amplifier power: 1*60W Power supply voltage: 8~24VDC Featured service: 60W Bluetooth 5.0 speaker Colour:blue Material:PCB+metal Size:72 x 48mm Package Contents: 1 * Power amplifier boardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

Features: Frequency and volume adjustable Different frequencies can make the song sound different. Fine tunes the volume of any RCA line level signal you want to control. sub-woofer level control This amplifier level control is used to adjust an amplifier‘s power level, stereo, equalizer or crossover volume form the dashboard or other remote locations. It adds sub-woofer level controls to balance a multiple amplifier installation. Compact Compact housing allows the unit to be mounted virtually anywhere so control is at the user‘s fingertips. Easy to install Simple in and out connections, no additional wiring needed. Scope of application The auto power amplifier is widely suitable for most car types. Specification: Type: auto power amplifier Quantity: 1pc Material: ABS + electric component Color: black Voltage: 12v Frequency: 150Hz - 40Hz Gain: 0db to -12db Net weight: 70g/ 2.47oz Package: 1* auto power ampl

Product name: NS4110B stereo 2.0 power amplifier board Output power: 2x20W Power supply voltage: DC12-18V Supply current: 3A or more Output impedance: 4-8 ohm Channel: 2.0 channel /stereo Voltage and power settings: Working voltage range: DC12V-18V Colour:green Material:plastic Package Contents: 1 * Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

12V 1000W Car Audio High Power Amplifier Amp Board Powerful Subwoofer Bass Features: -- Current Overload, Short Circuits, Thermal Overload, DC Offset. -- Mono 1000 Watts Car Audio Amplifier gives you a wonderful in-car entertainment. -- High power, good sound quality, no distortion, give you a great hearing enjoyment. -- Light weight, handy and easy to install. -- Powerful bass. Specification: Model: PA-80D Product Name: Car Amplifier Subwoofer Type: Subwoofer Speaker Color: Black Material: Aluminum alloy Channels: 1-Channel Operating Voltage: 12V Sensitivity: 200mv-8v Frequency Response: 10-30kHz Max Power: 1000W Impedance: 4-8 Ω SNR: 105dBA THD: ＜0.1% Size: 23.3x15.5cm/9.17x6.1" Package Included: 1 x Car Audio Amplifier Board Wiring: 1. Speaker connection: amplifier board has a good piece of red and black wire welding can be accessed by a 4-8 Euro 100-150W bass or full-range speaker or speakers (red pick horn + , black pick speaker - is recommended to use 4 ohm 8-12 inch 45 core 100-170 magnetic bass ) ; 2. Power connection A. Car has a CD player : GND then negative vehicle power ; 12V 12V power supply connected to the car 's positive ; REM CD player connected to the control line (so the CD player can directly control the subwoofer amplifier on and off ) B. Car no CD player : GND connected to the negative power of the car , + 12V and REM connected together in positive 12V car power ( + 12V can also be an indirect one with REM switch control amplifier switching function ) ; C. Directly with the battery (battery) connection : GND connect the battery negative , + 12V and 12V REM then the positive battery simultaneously . Note: 1. Please allow 0.5-1cm differences due to manual measurement. 2. Due to the light and screen difference, the item's color may be slightly different from the pict

Product name: NS4110B stereo 2.0 power amplifier board Output power: 2x20W Power supply voltage: DC12-18V Supply current: 3A or more Output impedance: 4-8 ohm Channel: 2.0 channel /stereo Voltage and power settings: Working voltage range: DC12V-18V Colour:green Material:plastic Package Contents: 1 * Amplifier BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

LM386 amplifier chip, the magnification can be adjusted by the board above the adjustable resistance between 20 times to 200 times, you can directly drive low-power speakers for the use of electret microphone. Operating voltage: DC 4V-12V Board size: 20mm * 20mm Package Included: 1 x LM386 Headphone Amplifier

Description: This power amplifier board is made of high performance TPA3116D2 chip with 2-channel stereo output, it has high performance in sound system. The premium chip has the protection functions of overvoltage, undervoltage, overheating, DC detection and short circuit, which is safe and reliable to use. Made of premium PCB material, the amplifier board is durable to use. The module is 8.3cm long, 5cm wide and 3cm high. It is widely used in home theater, square speakers, store solicitation, etc. Item Name: Digital Power Amplifier Material:PCB Output Power: Maximum 50W×2 Frequency: Switch Frequency: 1.2MHz Chip: TPA3116D2 Power Supply Voltage: DC 5V-24V Model: XH-M189 Vocal Tract System: 2-channel Stereo Protective Function: Overvoltage, Undervoltage, Overheating, DC Detection, Short Circuit Size:8.3cmx5cmx2.3cm/3.27inx1.97inx0.91in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Power Ampli

📣【Welcome to our store! We are a professional overseas wholesale company with our own factory in China】 ----------------------------------------------------- 🚕🚕🚕 Car Show 🚕🚕🚕 → There are many Similar products and accessories in the store！🏬 → Buy them together for more discounts!🛒 🚀 Ready stock ! 🚀 🚀 Fast Delivery ! 🚀 🔊Pls Attention! 🛫Our products are delivered to you by plane🛬 🛫Our products are delivered to you by plane🛬 🛫Our products are delivered to you by plane🛬 → Buy more,save more ! → Find more products → Follow us! ----------------------------------------------------- 🚕Description: This amplifier has built-in recording function, conference microphone priority function, Bluetooth 5.0 lossless transmission, karaoke reverb function, the sound quality is more delicate and more perfect, a Bluetooth digital power amplifier with multi-function conference karaoke home car AC and DC dual-use machine. 🚕Description: Model: G50 Undistorted power output: 400W X2 Power supply voltage: 12V/110V/220V Volume adjustment With display function Pluggable U disk TF card with radio with Bluetooth function AUX audio input 🚕Feature: Size: 19X15.5X6.4CM Rated voltage: 110V/220V/12V Rated power: 400W X2 Rated frequency: 50-60Hz Resolution: None Distortion rate: 0.02% Signal to noise ratio: 92db Impedance: 4-16 Amplifier type: HIFI amplifier Material: Iron Receiving method: FM 🎁Package Included: ✔️1XCar Amplifier ✔️1XInstructions ✔️1XRemote Control (without battery) -------------------------------------------------- 🌹【Feedback】 -If you are satisfied with our services and products, I hope you can give us 5 stars. Your support is of great significance to us. -If you have any questions, please contact us before leaving any feedback. We will help you solve the problem and make you satisfied. -We will reply you within 24 hours, if you do not receive a reply within this time, please send it to them again. Any problem?... Now chat! 🙋If you have any questions, please contract me❤️❤️❤️ ❤️❤️❤️Welcome to consult❤️❤️❤️ TO 💖Best wishes !💖 #amplifierwithbluetooth #amplifierwithspeaker #amplifierbluetooth #caramplifier #poweramplifier #miniamplifier #12vamplifierwithbluetooth #amplifier12v #amplifierkit #subwooferamplifier #amplifierspeaker #stereoampl

Package Included: 1* power amplifier module Specifications: Product Name: 2.1 channel Bluetooth audio amplifier module Product model: zk-tb21 Bluetooth version: 5.0 (no occlusion, 10m) Input sensitivity: 500mv Input mode: aux + Bluetooth Number of channels: 2.1 Power amplifier chip: tpa3116d2 (with am interference suppression function) Adaptive power supply: DC12 ~ 24 V / 5 A or above (the higher the voltage, the greater the output power) Adaptive horn: 20 ~ 100W, 4 ~ 8 Ω Output power: maximum 50W for left and right channels Subwoofer up to 100W Protection mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protection Product size: 120mm * 100mm * 20MM Product weight: about 256g (including package) Tip: when the audio input is enough and the power supply voltage / current is enough, there will be enough output power!!! The higher the power supply voltage is, the greater the output power is, the smaller the horn impedance is, and the greater the output power is! Please make sure that the power of the adaptive power supply is greater than the actual working power of the power amplifier!!! Description: 1. How to select power supply? The power supply of the board matching is very important. The ripple of the selected power supply must be small. The power supply with large ripple will cause the noise at the bottom of the power amplifier board to increase and there will be current sound. The higher the voltage, the higher the current, and the more sufficient the output power. If you only have 12V 1a, you can bring a 3-4 inch speaker. If you are above 19v 5a, with 8-10 inch no problem, power must be attached great importance. If the voltage is too low, the sound amplification is easy to cause sound distortion. If the current is too small to bring up, the horn will pull down the voltage, work abnormally or the sound quality becomes poor. It is recommended to use 18v19v2v power supply with current above 5A. If you only have 9v12v or 1A 2A power supply, you can also use it, but the power is small. If the volume is close to the maximum, it may cause distortion and affect the sound quality. 2. How to choose the horn? On the type of horn: commonly used horn is generally 4-8 ohm, can be used. The left and right channel speakers need to be connected with full frequency speakers or medium and high frequency speakers, and the power is between 20W and 100W. Subwoofer speakers can not be connected to ordinary speakers, need to be connected with subwoofer speakers, power between 20-100. The subwoofer horn should dive at least 50 Hz. If your speaker power is small, such as between 20w-50w, it can also be used. The power supply voltage needs to be smaller to prevent burning the speaker after loud. For example, choose a power supply below 15V. If you are a 50W - 100W speaker, you don't have to worry about the burning problem of the speaker. You can choose a 12 - 24 V power su

Product name: Bluetooth 5.0 stereo 2x20W high and low bass with remote control U disk AUX power amplifier board Power requirements: DC12-18V Current: 3A or more Output power: 2x20W Output impedance: 4-8 ohms Bluetooth version: JL-AC6925A-5.0 Input method: Bluetooth+AUX+USB Channel: 2.0 stereo Color: green + black material: plastic Package Contents:1 x Power Audio BoardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1

Features: - The potentiometer adjusts the volume with a switch for easy control of the volume, making it ideal for DIY speakers.If it is a metal box, you need to bring out the Bluetooth1 antenna. - The copper DC connector is used to withstand high current and no heat. - Capacitor 470uf35V solid capacitors ensure power storage and heat dissipation, and stable power supply is a prerequisite for good sound quality. - Free DC head lead, compatible with the input power interface of this product, even if you don't have a DC head adapter or battery, it can be easily wired. - 5.0 Bluetooth1 version, the transmission efficiency is higher, the transmission distance is farther. Note: The power switch on the board is the standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug the DC plug on the machine for a long time. Question and Answer: 1. How to choose a power supply? The power supply with the board is critical. The higher the voltage, the higher the current and the better the output power. If you only have 12V 1A, you can bring a 3-4 inch speaker. If you are 19V 5A or above, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, the sound will be distorted after the sound is amplified. If the current is too small, the speaker will pull the voltage low, work abnormally or the sound quality will deteriorate. It is recommended to use 18V19V24V power supply with current above 3A. If you only have 9V12V or 1A 2A power supply, it can also be used but the power is small. Please pay attention to the maximum volume when using it, which may affect the sound quality. 2. How to choose a speaker? Commonly used speakers are generally 8 ohms, can not distinguish between positive and negative, the effect is the same, 4 ohm speakers can also be used. If your speaker power is small, it may be used between 10W-30W. The power supply voltage is small to prevent the amplifier from burning out after burning. For example, select a power supply below 15V. If you are a 50W-200w speaker, don't worry about the speaker burnout. You can choose 12-24V power supply. The higher the voltage you choose, the louder the output sound or power. 3. How to connect to Bluetooth1? Power on the power amplifier, connect the speaker, turn the audio knob blue light to turn on, turn on the phone settings - Bluetooth1 - search for "BT-WUZHI", and then click the connection, there will be a beep when the connection is successful, this When it is in Bluetooth1 mode, you can play music. The next time you power on, it will automatically connect with the phone. Package Included: 1 x 502L MINI 50WX2 Bluetooth1 5.0 Digital Power Amplifier Board 1 x Shell Kit(If you chose version with s