L+ L- and R+ R- connect to speaker; GND connect to power negative part; +5V connects to power positive part; Audio input connects to L-IN R-IN GND; Power: DC 2.5~5.5V; Output power: 3W + 3W; SNR: 90dB; Size: 19 x 20mm; Installing hole: 2.8mm; Thickness: 2.8mm; Voltage can not beyond 5.5V; Built-in gain buffer; Input cable better be shielding cable; Output is BTL driving mode; Cables of speaker are independent.
Sound loud and clear high SNR tested two 100W8 ohm speakers pushing very loud. Compact (PCB board 31x22mm) the circuit is simple reliable work. Computer power available USB port can also be battery powered for any space with LED power indicator can be observed at any time power status. Has sealed potentiometer with power switch adjust the volume and control can be arbitrary and off the power supply; export grade 1000uF filter capacitor using a large capacitor and all other components used in all genuine long-term stability.
Introduction This amplifier board with FR4 board choose a low-power high-fidelity digital amplifier chip and then with a high-frequency low-impedance capacitors TDK fully shielded inductors making this deep and powerful bass amplifier board and good flexibility. Alto honest warm clear and bright treble. The entire board with SMD machines infrared reflow soldering reliable up to 93% efficiency low power consumption heat a small less than 35W without a heat sink. Caution: 1. Power limit voltage 36V do not exceed this voltage power supply do not reverse the positive and negative; 2. Power supply recommended as 22V 2A power supply filtering better; 3. Speakers recommended 4-8 inch speaker; 4. Audio output Do not short circuit or shorted to ground each other; 5 .Please check carefully before electricity before power to ensure that the wiring is correct.
Operating Voltage:10V~25V; Limiting Voltage :30V (Not recommended); Maximum Output: 25W x 2 (27V 4 Ohms) 20W x 2 (24V 4Ohms); Input Hole Distance: 2.5mm; Output Hole Spacing: 5mm
Mini Digital Power Amplifier Board 2*3W Class D Audio Module USB DC 5V PAM8403 Feature: Can use the computer USB port 5V power supply or using a mobile phone charger USB port 5V power supply Battery power can also be used High efficiency: 90% Can provide 3W (left channel) + 3W (right channel) output power in the 4 load and 5V power supply conditions A class, B class amplifier such efficiency is only about 30% D class amplifier is highly respected today D class amplifier efficiency is extremely high, not because of temperature affect the sound quality But do not add heat sink and take less space noise cancelling circuit was built in the amplifier board Power on / off without pop noise Module has a short-circuit current protection and over-temperature protection Specification: Operating Voltage: 2.5V ~ 5.5V Speaker With: 4Ohm ~ 8Ohm (recommended: 4Ohm) Speaker Power: 2W ~ 8W Size: 21 x 18 x 3.4mm (L x W x H) Net Weight: 1g Application: LCD TVs, monitors Laptop Portable Speakers Portable DVD players, game consoles Phone / speakerphone Note: First turn OFF and then powered speakers or likely to cause damage to the chip; Because digital volume control module has a great gain so do not let too much leaving the audio signal input signal cut limiter. Package included: 1 x Mini Amplifier Board
Operating voltage: 2.5V~5.5V; Suitable for speaker: 4~8 ohm recommend to use for 4 ohm speaker speaker power: 2-8W; Powered by USB 5V port through PC or cellphone; This product can be also powered by lithium battery; High efficiency: 90%; With 4 ohm load and 5V power supplyit can provide 3W (left channel) + 3 W (right channel) output power; D class high power amplifier efficiency sound quality won't be affected by the high temperature and you don't need to use additional heat sink; With short circuit / over-current / over-temperature protection; Application: LCD TV monitors laptop portable speakers portable DVD players game consoles cellphones and hand-free phone.
Model PAM8403 Quantity 1 Color Blue Material PCB Specification Working voltage: 2.5~5.5V; Max output: 3W x 2 (5V 4ohm); Efficiency can be more than 90%; Supports USB power supply Features Digital amplifier board Application DIY English Manual/Spec No Packing List 1 x Amplifier board
1. The tone board contains 10 times the pre-amplification and treble alto bass volume control; 2. Components using NE5532 operational amplifier board high-quality small potentiometer electrodeless coupling capacitor; 1% metal film resistors capacitors etc. Philips CBB. 3. Kit with operational amplifier IC sockets flexible to use anf easy to upgrade. 4. Circuit board layout is reasonable low noise fine component layout 5. Supply Voltage: AC Dual 15V.
Introduction Efficient super mini digital amplifier to obtain input 5V 6W of power special internal output processing circuit for maximum power output at a lower voltage super power built-in standby electronic switch built-in high -gain buffer amplifier built-in short circuit protection. 3.6 to 6V single-cell lithium battery or USB -powered appropriate also be four 1.5V batteries power transformers to add fixed 5V regulator circuit chip will burn more than 6V . Take the USB 5V power supply is recommended to use a single lithium or electricity . Slim board can be very easy to put into a small plastic box or other device in the slot such as to create MP3 / 4 or small laptop external speakers etc. as you imagine . Special Note : 1. It can not reverse the positive and negative power supply voltage must not exceed 6V these two violations could result in IC damage. 2. Chip have high- gain buffer the board can not alter any component parameters do not meet the parameters will result in IC damage. 3. Input line please try to use a shielded cable you can play the role of interference eliminating clutter current sound. 4 Output cmos tube BTL drive so the speakers can not be connected with the negative that is connected to the speaker four lines are completely independent does not allow total access .
Product description: Excellent noise suppression in the absence of the input audio ear horn can not hear any noise two channel stereo; 5V power supply and can output 3W+3W power and can directly drive 4 ohm 8 ohm speakers; Large output power energy sufficient good sound quality; Unique Class D digital power board without LC filter; Can be powered through USB of compute; Dual panel wiring wiring properly solve the crosstalk caused by ground potential balance and inter channel; Ultra micro design can be easily placed in a variety of digital products inside the small space; High amplification efficiency; Whole board soldering by machine far better than manual soldering; Note: Negative of left and right output port can not be connected in parallel otherwise it will burn IC connect the speaker (load) before power on; Rated voltage: 2.5~5V; Limit voltage: 5.5V
Introduction The amplifier board has good sound quality external components is simple compact and so on. USB-powered no external power supply. USB digital audio decoding circuit replace the computer onboard sound card motherboard to get rid of high frequency interference to ensure pristine sound quality. High efficiency instant USB interface power supply in the still strong sound performance. USB HID digital volume control 3D high-fidelity surround sound control and mute buttons and working status indicator easy to use. Full support USB2.0 full-speed bus containing 16 1.5W per channel digital amplifier that can drive 4 ohm speakers stereo surround sound effects included. A 5V power supply built-in 5V to 3.3V buck regulator reset voltage 3.3V. A built-in USB HID and a volume control and mute function. Large gain 0/3.5/6 Db high-quality 16-bit digital sampling the sampling frequency is 48KHZ capacitive and filtration speakers and anti- POP feature can be extended outside EEPROM for the development of client PID VID and other product features; Special Note : On-chip high -gain buffer the board can not alter any component parameters. Does not meet the parameters Will result in IC damage. Output CMOS tube BTL drive so the speaker can not be negative Take enough together that the four lines connected to the speaker is completely independent does not allow total access
USB powered 2.5~5V; Great noise reduction; Dual-channel stereo sound; 5V power supply can output 2 x 3W power drive 4ohm / 8ohm speaker; Great sound effect; No LC filter; Dual-side wire laying anti-interference; Suitable for various digital products; One-piece soldering by machine
3Pcs PAM8403 Mini Digital Power Amplifier Board Class D Audio Module USB DC 5V 2x3W Feature: Can use the computer USB port 5V power supply or using a mobile phone charger USB port 5V power supply Battery power can also be used High efficiency: 90% Can provide 3W (left channel) + 3W (right channel) output power in the 4 load and 5V power supply conditions A class, B class amplifier such efficiency is only about 30% D class amplifier is highly respected today D class amplifier efficiency is extremely high, not because of temperature affect the sound quality But do not add heat sink and take less space noise cancelling circuit was built in the amplifier board Power on / off without pop noise Module has a short-circuit current protection and over-temperature protection Specification: Operating Voltage: 2.5V ~ 5.5V Speaker With: 4Ohm ~ 8Ohm (recommended: 4Ohm) Speaker Power: 2W ~ 8W Size: 21 x 18 x 3.4mm (L x W x H) Net Weight: 1g Application: LCD TVs, monitors Laptop Portable Speakers Portable DVD players, game consoles Phone / speakerphone Note: First turn OFF and then powered speakers or likely to cause damage to the chip; Because digital volume control module has a great gain so do not let too much leaving the audio signal input signal cut limiter. Package included: 3 x 2 x 3W class D Mini Amplifier Board
Model 6977 Quantity 2 Color Green Material Copper + PCB Specification DC 2.5~5V power supply; 3W+3W dual track output power; Direct drive 4 / 8 ohm speaker Features Amplifier Module Board Application DIY projects Packing List 2 x Amplifier Module Board
Brand No Model GF-007 Quantity 1 Color Green Material FR4 Features Excellent in noise control in the case is connected with the input audio there is no any noise even we close the speaker when there is not input audio; Two channel stereo 5V power supply it can output 3W+3W power and can drive 4 ohm 8 ohm small speaker directly it is with large output powerenough energy and good sound quality; Class D digital power board without LC filter is unique and can be charged by wiring the potential balance and inter-channel; Ultra micro design can make it be easily placed inside of various digital products it is with amplification efficiency; Note: the negative of the right channel output can not be connected together otherwise it will burn IC and we should connect the speaker before power is switched Specification Input voltage: 2.5~5V; Powered by USB Application single-chip systems experiment English Manual/Spec Yes Packing List 1 x Mini amplifier board