Power amplifier là gì

Description: Model:PA8403 Power:Low Power Excellent noise suppression, in the absence of circumstances connected to input audio ear close to the speaker can not hear any noise, two-channel stereo, 5V power supply can output 3W 3W power, can directly drive 4Ω, 8Ω small speakers, the output power large, full of energy, good sound quality. The unique non-LC filter Class-D digital power board can be directly used computer USB power supply. Double panel wiring, wiring properly resolve the ground potential caused by balance and inter-channel crosstalk, ultra-miniature design, can easily be placed in a variety of digital products within a small space, high amplification efficiency. All using the whole plate welding machine, welding quality comparable non-manual soldering iron! 100% brand new and high quality Operating voltage: 2.5V-5.5V Maximum output: 3Wx2 (5V 4 ohms) Efficiency can reach above 90%, you can use the computer USB port 5V power supply The board compact with a switch potentiometer, you can adjust the volume and control of arbitrary power switch. Working voltage should not exceed 5.5V, the power of positive and negative can not be wrong. Otherwise, there is the possibility of damage chip Board size: 2.9cmx2cm/1.14x0.78inch(Dimensions without potentiometer handle protruding parts) Quantity:1set Note: Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes(No Retail Package): 1Pc x PAM8403 Digital Amplifier Board With Switch Potentiometer 1pc x

welcome to easyturn.vn 🌸ĐẦY ĐỦ 🌸 TPA3118 PBTL Mono Digital Amplifier Board 1X60W 8-24V POWER AMP Replace TPA3110 Features: Sound quality is very good by using this module. Mono digital audio power amplifier chip. High output and low power consumption. Applicable speaker impedance: 4-8 ohm(8 ohm is the best). Specifications: Working Voltage: DC 8-24V Power Output: 60W Applicable Speaker Impedance: 4-8 ohm PCB Board Size: 45 * 35mm / 1.77 * 1.4in Weight: 12g / 0.43oz Package List: 1 * Digital Amplifier #TPA3118 #POWER #🌸ĐẦY #Amplifier #TPA3110 #1X60W #Replace #PBTL #🌸 #8-24V #Mono #Board #ĐỦ #Digital #AMP #TPA3118-PBTL #8-24V-POWER #Digital-Ampli

Hi,dear！We ship from China, our products are cheap and available, welcome you order! The new single-channel digital amplifier board 1, pre-preamp system, a substantial increase in the ability to enlarge 2, improved impact sound switch 3, improved audio cable noise Using TDA3116D2 MONO voltage: DC12V- DC26V Output: Max 150W SNR: 100dB Use DC12V power 50W, DC20V power 100W, DC24V power 150W colour: red+gold Material: metal Size: 77*73*16mm Package Contents: 1 x TPA3116D2 Mono 150W Digital Power Amplifier Board 12-26V Only 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

♫ HA400 Ultra-compact 4 Channels Mini Audio Stereo Headphone Amplifier with Power Adapter Features: Ultra-compact stereo headphone amplifier for studio and stage application. With 4 headphone output channels and 1 input channel. Volume of each output channel can be controlled independently. Provides highest audio quality for each headphone even at maximum volume. Ultra low noise 4580 operational amplifier for outstanding audio performance. Comes with a DC 12V power adapter. Specifications: Material: Metal Color: Silver/ Black(optional) Power Adapter: 110-240V US/ EU Plug(optional) Item Size: Approx. 10.5 * 5.5 * 4.5cm / 4.1 * 2.2 * 1.8in Item Weight: 185g / 6.5oz Package Size: 22.5 * 14 * 8.5cm / 8.9 * 5.5 * 3.3in Package Weight: 385g / 13.6oz Package List: 1 * Amplifier 1 * Power Adapter 1 * User Manual (English) #miniamp #4headphoneoutputchannel #audioamp #Amplifier #poweramplifier #miniaudioheadphoneamplifer #guitaramp #portableamplifier #1input #electricguitarampl

PK LP-838 Car Home Power Amplifier HiFi 2.1 MP3 Radio Stereo Bass Speaker Booster Features: All-aluminum and sand-blasting shell, good heat dissipation. Mega bass part and volume control, offer you sensational music. Mini and compact design, space saving and easy to operate. Support connecting with mobile phones, computers, MP3, MP4 and DVD players. Low consumption and excellent thermal stability. Descriptions: Fine workmanship, long service life. Smart and lightweight, portable to carry. Great for use on your vehicle or your home. Specifications: Model: LP-838 S / N:75dB Frequency response: 29Hz - 18KHz Distortion: less than 0.1 ( 1KHz ) Rated power: 20W Rated voltage: 12V Impedance: 4-8Ω Material: aluminum Size: 15x10x3.5cm Color: black, silver Package included: 1 x LP-838 Power Amplifier (without Power Adapter!) Notes: 1.Due to the difference between different monitors,the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Due to the manual measurement and different measurement methods, please allow 1-3cm deviation.Thanks

Welcome to little.apple.vn shop Features: IMPORTANT: DC power is not support, work with AC12V power This preamplifier is not amplifier, should work with Active Speaker or power amplifier. Sound warm natural soft Product Details: Adopt A1013, C2383 triode power amplifier, 6J1 electron tube. Using AC 12V power supply, the output audio signal can be used for various digital power amplifier boards. Crystal shell Specifications: Channels: two channels Output impedance: 4-8Ω Supply voltage: AC12V Dimensions: 81*81*43mm Package Included: 1 × Assembly preamplifier board 1 × Crystal shell 2 × 6J1 Tube *Power supply is not inclu

Features: Made of durable material, anti-corrosion and wear resistant. Accurate incisions and interfaces, convenient to install to right locations. Adopts the chip YD138-E with function of over-current protection, thermal protection and noise reduction. Wide voltage working range. It can work normally in DC 9-14V, current 2A and above power supply. Large dynamic range. It can display cricket sound to blare sound, small distortion. The load of 8 Ohm is 2 x 8W, the load of 4 Ohm is 2 x 12W. Easy to operate and anti-aging. Specification: Item Type: Amplifier Board Color:Random colors, subject to the real thing Working Mode: D(Self - arterial wide modulation) Chip Version: YDA138-E Recommended Voltage: 12V 1.5A Channel Type: Dual channel Signal to Noise Ratio: 92 Percent Output power: 2 x 8W (8Ohm speaker) 2 x 12W (4Ohm speaker) Size(approx.): 56x36x20mm Package Includes: 1 x Module Note:  1. Due to the different monitor and light effect,  the actual color of the item might be slightly different from the color showed on the pictures. Thank you!  2. Please allow 1-3cm measuring deviation due to manual measurement. #Amplifier #Board #XH-M145 #Digital #Power #Class #D #Big #Dynamic #Range #Small #Distortion #Wide #Voltage #Easy #Operate #Integrated #Cir

100% brand new and high quality Features: Amplifier board by default in the ACF-1 mode, use the CTRL mode setting, the welding will be welded out. The CTRL pin is usually connected to the Bluetooth MUTE pin. By inputting different voltage values at the CTRL terminal, four operating modes can be realized, namely, anti-topping mode 1 (ACF-1), anti-cancellation mode 2 (ACF-2), and anti-topping function off mode (ACF-OFF) and chip shutdown mode (SD). Specification: Input voltage: 3.6 ~ 8.5V Output: 2x10W Dimensions: 2.1x2.1cm/0.83x0.83inch Color: Green Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x HT8696 Differential Amplifier Board (without retail package) #HT8696 #Differential #Amplifier #Board #2x10W #Digital #Class #D #Audio #Power #Ampl

______________♥♣♥ Welcome to our shop ♥♣♥______________ Decription: Features: Onboard front-facing IC to improve the input sensitivity, high-definition sound quality. Name: TPA3116D2 Digital Amplifier Board Model: XH-M543 Chip type: TPA3116D2 Working voltage: DC12-26V Output power: 120*2W MAX, DC12V, 2*50W,DC24V, 2*120W Signal to noise ratio: 100db Channel: Dual channel stereo Size: 92 x 68 x 16mm 100W 24V, maximum rated current is 4.2A The maximum is 100W, please try not to adjust to 100W 100W is the maximum amount, the current will follow the actual transfer to change, there is no fixed current Included: 1 x Audio Amplifier

About us We promise 1: Only produce the best consumer products and ensure the highest possible quality. 2: Product quality has reached a series of certifications 3: Deliver the goods to customers quickly and accurately Customer Service Policy 1: Process the order in time after payment is confirmed. 2: We only ship to the confirmed order address. Your order address must match your delivery address 3: Due to the inventory status and time difference, we will choose to ship from our first available warehouse for fast delivery. Our advantage 4: Since your feedback is very important to our development, if you are satisfied with our products and services, we sincerely invite you to leave us positive feedback. Thank you very much for your pre

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

Chip type: TPA3116D2 Power supply: DC 12-24V Channel amount: Dual 50W Product size: 37.2mm x 25.6mm x 1.5mm(LxWxH) color:blue Material: Metal Note: If your power supply and the audio equipment are common ground, when connecting the TV box, there will be a little current noise because this amplifier board does not have noise isolation function for power supply. So, you need a common ground isolation board; Please enhance the heat dissipation such as adding a little heatsink chip on the amplifier board when your power is relatively higher or your amplifier board has been used for a long time. Package include: 1x Amplifier Board 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

Description: Mini Bluetooth power amplifier, 60W high power, stereo, heavy bass Bluetooth 4.2 connection, 10 meters transmion distance HIFI sound quality digital amplifier Driver-free, you can use the Android data cable to connect the computer's USB as a computer sound card Amplifier type: 2.0 stereo Rated power: 60W Audio input: 3.5mm AUX, Bluetooth, Android USB Power requirements: DC 12V/5A (not included) Package Includes: 1Pcs Bluetooth Audio Amplifier 1Pcs

___________________________________♤Dressit.vn 3C♤_______________________________ Welcome to DRESS 3C Guarrantee: ✔Ready Stock✔Good quality✔Cheapest price ✔ Brand new 100% ❤❤Surprises for you❤❤ ❀Follow shop/ “Like” Items: Priority Shipping & Free Gift ☞PS: New Store,always the best price, wish your kindly support ！！ Feature: 1. The product adopts high-quality materials, effectively avoiding corrosion and wear, durable to use. 2. Easy to operate, anti-aging and with long service life, you can use with confidence. 3. Precise cut and interface ensure perfect applicability, suitable for installation location and easy to install. 4. Adopt professional chip set, providing excellent performance in the system. 5. Reliable to use, long service life, not easy to damage, and you can use for a long time. Specification: Item Type: Power Amplifier Module Product Name: Bluetooth Digital Amplifier Board Dual 5W Chip Model: PAM8403 Transmission Distance: Up to 20m/65.6in (no blocking) Supply Voltage: 5V (Micro input) Number of Sound Channels: 2 Maximum Power: 5W+5W Battery: 18650 batteryx1 (NOT included) Package List: 1 x Power Amplifier Module 2 x Cab

Dear friend, welcome to our shop！Hope you have happy shopping！More discount are waiting for you! Using LM386 amplifier chip, magnification of 200 times, you can directly drive small power speakers, suitable for electret microphone amplification. Practical application: Deafness hearing aids: board connected to the microphone, power, headphones, is a good deaf hearing aids. Operating Voltage: DC 3.7V-12V Board Size(approx): 25mm x 25mm Packing List: 1pcs x LM386 Electret Microphone Power Amplifier

Hello everyone, our company is in Shenzhen。we specialize in selling module. When we receive your order, we will process your order within 24 hours. If you order many items, we may need more time to process, it will not be more than 5 days, please be patient. Genaral it need 1-2weeks arrive your hand.if you chat with us , we donot reply you, donot worry , we are try to handle your order.so pls donot cancel o

Description: Product Name: Amplifier Board; Material: Plastic,Metal Package Content: 1 x Car Amplifier Board; Color: Green, Black, Silver Tone Dimension: 13 x 10 x 4cm/ 5 x 4 x 1.5 inches(L*W*H) Supply Input: DC 12V(min 2A) Specification: Size: 13 x 10 x 4cm Package Includes: 1 Piece Car Stereo AMP M

1.Brand new and high quality. 2.Used to adjust an amplifier's power level, stereo, equalizer or crossover volume form the dashboard or other remote locations. 3.Adds sub-woofer level controls or balances a multiple amplifier installation. 4.Compact housing allows the unit to be mounted virtually anywhere so control is at the user’s fingertips. 5.Fine tunes the volume of any RCA line level signal you wish to control. Simple in and out connections, no additional wiring needed. Connect the RCA from the output of this Controller to the amplifier, and wire the car stereo output to the RCA input of this unit. Great for a sub amp volume control. Material: plastic Adds a Dash Mounted Sub-Woofer Volume Control 4 gold plated RCA's (2 RCA input & 2 RCA output) Level control knob Frequency 150Hz - 40Hz Gain 0db to -12db Package Contents: 1 X Car Home Amplifier 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

Chip Type: TPA3116D2 Supply voltage: dc12-24v Output Power: 100W SNR: 100db Channels: Mono size: 79 * 54 * 16MM color: blue Material: metal + PC Package Include : 1 X 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

Description: ST company TDA7388 (STMicroelectronics, the world's fifth largest semiconductor company services all electronic market segments leading integrated device manufacturer). Production of four-channel car dedicated IC chip is used in the form of BTL output, peripheral original pole small but excellent sound quality, the installation is also very convenient, packaged as 25-pin dual in-line. Power supply for the DC 12V-14.5V, this product is four-channel amplifier module, the most common of the circuit pattern design concept is also very consistent with the overall. effect of the IC. Kit material is also very particular about Weimaraner dedicated audio capacitors CBB capacitance Matsushita, Japan's ruby filter capacitor, in order to facilitate connections. All of the board's input and output terminals using a 5.08mm facilitate external connection. Specification: Material: FR-4 glass fiber copper clad sheet Product Size: 80 x 50 x 40mm/3.15 x 1.97 x 1.57inch Input voltage: single DC 12-14.5V Output power: 4 x 41W Weight: 70g Package Includes: 1 Piece DC 12V TDA7388 Four Channel 4 x 41W Audio Power Amplifier Board BTL PC Ca

We have many products in our warehouse, our warehouse is in Shenzhen . Genaral it need 1-2weeks arrive your hand. if you subimit order , we will handle in 1-3days.if you chat with us , we donot reply you, donot worry , we are try to handle your order.so pls donot cancel o

We have many products in our warehouse, our warehouse is in Shenzhen . Genaral it need 1-2weeks arrive your hand. if you subimit order , we will handle in 1-3days.if you chat with us , we donot reply you, donot worry , we are try to handle your order.so pls donot cancel o

About us We promise 1: Only produce the best consumer products and ensure the highest possible quality. 2: Product quality has reached a series of certifications 3: Deliver the goods to customers quickly and accurately Customer Service Policy 1: Process the order in time after payment is confirmed. 2: We only ship to the confirmed order address. Your order address must match your delivery address 3: Due to the inventory status and time difference, we will choose to ship from our first available warehouse for fast delivery. Our advantage 4: Since your feedback is very important to our development, if you are satisfied with our products and services, we sincerely invite you to leave us positive feedback. Thank you very much for your pre

tpa3116 amplifier 100W Subwoofer Amplifier Board;Frequency response range: input: 20 hz - 20 KHZ, output: 20 hz - 180 hz tpa3116 2x50w amplifier board Operating voltage range: DC 12-24V(maximum voltage is no more than 24V); built-in TPA3116 amplifier chip;This is a pre-amplifier, bass frequency processing, with bass volume potentiometer control of the bass amplifier board. bluetooth amplifer board DC 12-24V power supply, wide operating voltage, power-saving design, more than 90% power efficiency. Maximum support 100W (Bass) bass channel output Audio input sensitivity: 500 mv;Speaker impedance: bass speaker impedance: 2-8 ohm You can use a good switching power supply adapter, laptop switching power supply, Here is our 24V power diy amplifier Instructions for function switch: 1. Plug in the power and turn on the default Bluetooth e 2. When the Bluetooth is disconnected, press the switch to switch the audio input e 3. Bluetooth playback status, short press the switch to pause/play Power Source:DC 12-24V Type:TPA3116 Subwoofer Amplifier Board Colour:Blue+black Material:PCB+electronic components+metal Size:100 x 100mm Package Contents: 1 x TPA3116 Subwoofer Amplifier Board (Because each batch of electronic components is different, the appearance or color of the product may be different from the picture)<br></br>Only 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

Sound quality is very good and it can drive 4/6/8 ohm speakers. It has sufficient and high power output 2*160W. Features: High output power digital amplifier. Sound quality is very good by using this module. Two-channel stereo, 2*160W. DC 15-36V power supply, with reverse polarity protection. When heat sink temperature is high to a certain extent, the cooling fan will work. Support BTL mode (on the back of amplifier board J1, J2, J3, J4 shorted), 36V 3ohm for mono 220W output. Applicable speaker impedance: 4/6/8 ohm(8 ohm is the best). Specifications: Amplifier Chip: TDA7498E Working Voltage: DC 15-36V(Recommend 32V, 8A) Output Power: 2*160W Number of Channels: Two-channel Stereo Efficiency: 85% Applicable Speaker Impedance: 4/6/8 ohm(8 ohm is the best) PCB Board Size: 108 * 78mm / 4.25 * 3.1in Weight: 170g / 6.02oz Package List: 1 * Digital Amplifier

SẢN PHẨM: Amly Mini Bluetooth BT-298A Bạn là người yêu thích ca nhạc , thành viên gia đình bạn thường xuyên tụ tập hát karaoke để tạo không khí vui tươi , sôi nổi vào những ngày xum họp vui vẻ ngày rảnh cũng như cuối tuần với âm thanh chất lượng tại nhà. khiến bạn đau đầu khó khăn khi tìm mua amly karaoke làm sao đế bạn lựa chọn sản phẩm tốt giá thành hợp lý (rẻ) dùng cho gia đình hãy để HC mart SG giới thiệu cho bạn 1 siêu phẩm: "Ampli Mini Blutooth nguồn 12v/220v Chip Âm Thanh CD7377 Tạo Âm Bass Chắc Chắn, Âm Treble Sâu , Bluetooth Kết Nối 4.0 tích hợp 2 cổng MIC Cho Công suất Lớn 3.0w +300w Thích Hợp Sử Dụng Cho Dàn Karaoke Gia Đình amly giá rẻ" THÔNG TIN SẢN PHẨM: - Công suất : 2 kênh 600w - Công suất ra loa 300w - Chức năng: Kết nối âm thanh, đọc trực tiếp USB, Thẻ nhớ Micro SD, đài FM, không có bluetooth - Điện áp hoạt động : AC-220V / 50 Hz – 60 Hz - Phụ kiện: điều khiển, jack AV ĐẶC ĐIỂM: - Bộ Ampli Mini Blutooth sử dụng nguồn AC 220v hoặc DC 12V tích hợp 2 cổng MIC - Kích thước nhỏ gọn, kiểu dáng sang trọng hiện đại, bạn có thể sử dụng vào nhiều mục đích khác nhau. - Sử dụng trực tiếp nguồn điện DC12V trên xe hơi hoặc cắm trực tiếp vào nguồn AC 220. - Công suất lớn cho phép bạn kết nối với và nghe nhạc hoặc ca hát với ngay cả đôi Loa thùng sẵn có trong nhà bạn - Tích hợp bluetooth, cổng đọc thẻ nhớ SD, USB, cổng Audio Input cho phép bạn lựa chọn nhiều cách để có thể nghe nhạc hoặc ca hát. - Tích hợp chức năng nghe đài FM hoặc kết nối với Angten trên xe ô tô để mở và nghe đài FM - Tự động lọc tạp âm, nhiễu giữ âm thanh chân thật. - Kèm điều khiển từ xa giúp người dùng sử dụng dễ dàng - Gọn nhẹ, dễ sử dụng, di chuyển và bảo quản. - Thích hợp sử dụng cho dàn karaoke gia đình. Hotline/ sỉ add zalo: 0878219042 ✔ Khách gặp vấn đề về sản phẩm vui lòng chat trao đổi với shop trước khi đánh giá ạ HC mart SG cam kết bán hàng "Chất lượng hơn số lượng", bảo hành uy tín, tận tình phục vụ quý khách để đem đến cho quý khách một trải nghiệm mua sắm tốt nhất, trở thành nhà bán hàng được thật nhiều khách hàng tin tưởng. Sự hài lòng của quý khách là niềm vinh hạnh của chúng tôi Cảm ơn quý khách, chúc quý khách một ngày mới tốt lành, thật nhiều sức

Channels: 2 (2.0) Maximum Power Per Channel: 10W This is a DIY accessory colour:blue Material:metal size:7.6*3.8*3cm Package Contents: 1*Double low-pass filter board setOnly 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

Description: Low distortion, low noise, high pressurization. Switch machine mute, over heat protection, short circuit protection. Delicate sound quality, sound field is balanced and good. High-power output, stable, sound closer to the tube. Suitable for home audio equipment amplification. Specifications:  Product name: Amplifier board Color: Green Voltage: 12-32V Power: 100W Frequency: 20Hz-20KHz Channel: 1.0 mono Speaker impedance: 4-8 ohms Size: About 60 x 45 x 34 mm Package Included: 1 PC* Amplifier board Note: Transition: 1cm=10mm=0.39inch. 1.Due to the light and screen difference, the item's color may be slightly different from the pictures. 2.Please allow 0.5-2 cm differences due to manual measurement. #Amplifier #Board #Single #Channel #Audio #High #Power #100W #Independent #Easy #Install #Sound #Stable #M

Features: With the new original TDA8954TH core technology, the BTL bridge circuit is more efficient.  Adopt original original rectifier bridge, original J13003 transistor. Adopt 2200uf array large capacity electrolytic capacitor.  Sound quality is very good, high efficiency and amplifying power. User can adjust the volume by themselves easily. Wide working voltage, energy-saving design.  Specifications: Type: amplifier board Size:about 82x72x37mm  Kernel chip: TDA8954TH  Input power: recommended dual 24V toroidal transformer (range dual 12-double 18V)  Output power: 420W  Number of channels: mono  Output impedance: 2-8Ω (4Ω recommended)  Package included: 1pc x amplifier board  Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. #Amplifier #Board #TDA8954TH #420W #High #Power #Digital #Audio #Mono #Channel #Accessories #Replacement #Stereo #Speaker #M

Descriptions: It is a mono channel audio amplifier, which is a perfect accessory for your speaker, practical and professional. PCB board is durable, good performance, and long time to use. Frequency response range is 14Hz-100kHz, and the maximum range of 3.29Hz-482.29kHz calculated by RC high and low pass circuit. Recommended supply voltage is 25V, maximum voltage should not exceed 30V, AC 18V full-bridge rectification is 25V. Specifications: Material: PVC Main color: blue Output power: 20W (maximum 30W) Speaker impedance: 4-8 Total harmonic distortion: < 0.04% Signal to noise ratio: 105dB Frequency response: 14Hz-100kHz (maximum range of 3.29Hz-482.29kHz calculated by RC high and low pass circuit) Supply voltage: recommended 25V (maximum voltage should not exceed 30V, AC 18V full-bridge rectification is 25V) Package Included: 1 set of audio amplifier board Note: 1. Due to the light difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. #Audio #Amplifier #Board #Kit #20W #LM1875T #Mono #Channel #DIY #Accessories #Replacement #Power #Portable #Player #M