Feature

●MULTIPLE FUNCTIONS: Stereo audio amplifier supports to modify Bluetooth name, password settings, prompt tone volume adjustment, on off prompt tone, lullaby, and firmware upgrade, etc.
●10 SOUNDS: The bluetooth power amplifier board has 10 kinds of sounds, creating a unique sound scene, quickly calming the mood and realizing deep sleep.
●SOUND ADJUSTMENT: Add rotary encoder, increase mid range adjustment, and fully cover the adjustment range of subwoofer, mid range and treble sound effects.
●POTENTIOMETER: Subwoofer and stereo output volume separate adjustment, the total volume is a mechanical potentiometer, the volume position is clear at a glance.
●EASY OPERATION: The power amplifier board has rich key functions, with simple operation, real stepless tuning, not digital multi stage hierarchical adjustment.


Description

Specification:
Item Type: Audio Amplifier Board
Model: TB21S
Material: PCB, Brass, ABS
Purpose: For Audio Optimization
Adaptive Speaker: Left and Right Channel: 20-50W, 4-8Ω; Subwoofer: 20-100W, 3-8Ω

How to Use:
1.Open2amplifiersofthesamemodel.
2.Selectapoweramplifieratrandom,andclickthetotalvolumeknobwithkeyfunctionthreetimesin.Atthistime,theredindicatorflashes,andtheotherpoweramplifierisautomaticallypairedwithitasastereocombination.(Ifnopairingissuccessfulwithin15seconds,theboxpairingmodewillbeautomaticallycanceled,andyoucantryagainbytripleclickingthekey)
3.Ifthepairingissuccessful,theselectedonewillbeassignedastheleftchannel,andtheredindicatorwillalwaysbeon,whiletheotheroneistherightchannel,andtheredindicatorwillflashslowly.

Package List:
1 x PCB Mainboard
2 x Cover Plates
4 x Standoffs
8 x Screws
5 x Knob Caps
1 x Plug
1 x Screwdriver