Tube Amplifier Kit, DIY Tube Preamp Kit, Tube Preamp, DIY Amplifier Kit, 6j1 Vacuum Electron Tube Valve Preamp Tube Amplifie Board Headphone Amp Parts Musical Fidelity Kit DIY Electronic Kits

Gikfun Digital 38khz Ir Receiver Ir Transmitter Sensor Module Kit for Arduino (Pack of 3 Sets) EK8477

1pcs Low Pass Filter Bass Subwoofer Single Power DC 18-32V Pre-AMP Amplifier Board Dual Channel with Bass Volume Control

Aideepen 5PCS BT 5.0 Stereo Audio Receiver Module, 3.7-5V MP3 Decoder Board and Amplifier for Car Speaker

Jancane Phono Preamp for Turntable, Mini Electronic Audio Stereo Phonograph Preamplifier with RCA Input, RCA/TRS Output, Low Noise Operation with 12 Volt DC Adapter

Diitao 10PCS Mini PAM8403 DC 5V Audio Amplifier Handy Digital Power Amp Module Board 3W+3W Dual-Channel PAM8403 Stereo Amplifiers with Potentiometer for DIY Portable

Clyxgs TPA3116D2 Dual Channel Class D Digital Power Audio Amplifier Board, DC12-26V High Power Stereo AMP Module for Car Vehicle Computer Speaker DIY Home Theater Audio System

Acxico 2Pcs LM386 10W Mini Power Amplifier Board Audio Amplifier Module DC 3-12V Volume Adjustable Control

BOJACK JRC4558 is a Dual Operational Amplifier with Internal Compensation Circuit（Pack of 20）

The Lord of the Tools 10PCS 2W 8 Ohm Internal Magnet Speaker 28mm Round Mini Loudspeaker for Electronic DIY Toys Radio Intercom Multimedia Speakers Mini Box Speakers