(Long the MODE button to recording, long the MODE button again to cancel recording and play the recording file; in recording mode, you need to connect a storage device U disk or TF card;). Support folder selection playback.
eBay
Nobsound NS-13G-MAX HiFi 2-Channel TPA3255 Phono Stereo Audio Amplifier Mini Class D Power Amp 300W*2
Aliexpress UK
Power amplifier type: expansion amplifier. 1 x Bluetooth digital amplifier. -302 power amplifier. Audio channel: 2.0 channel. Rated power: 30WX2. Signal-to-noise ratio;75dB. Weight: 230g (KG).
eBay
2 CH SYM5-3 High Bias Class AB Power Amplifier DIY Kit/Finished board Base on Symasym5-3 Amplifier
Aliexpress UK
(Long the MODE button to recording, long the MODE button again to cancel recording and play the recording file; in recording mode, you need to connect a storage device U disk or TF card;). Support folder selection playback.
eBay
ShennDare PDA801+PRE Audio Speaker Amplifier Module 1x800W 8OHM Pre-Amplifier For Subwoofer 1X1000W 4OHM
Aliexpress UK
1x CSR8645 Amplifier board. M + and M- is the positive and negative of the microphone. COM is the common side of the key,the other end of the key are then VOL+,VOL-, PREV,NEXT,PLY.
eBay
Douk Audio NS-08E Mini Vacuum Tube Headphone Amplifier Best Stereo Audio Preamplifier HiFi Home Desktop Audio Amp
Aliexpress UK
Output power: 2x80W. Zhongke solution, decoding supports music in MP3/WAV/FLAC/APE lossless audio decoding formats;. Support Bluetooth function, Bluetooth version 5.3;. 1x Bluetooth audio decoding amplifier board set.
eBay
Reference Golden Voice C-2860 Plus Fully Balanced Pure Class A Pre Amplifier AC-220V/110V HiFi High Temperature Pre Amplifier
Aliexpress UK
USing PCM5102A decoding chip can provide analog audio signal for preamplifier or power amplifier, no need for DAC. Adopting NEC high precision relay to switch between AUX and between Bluetooth, AUX input without any chip procession, make certain that AUX audio can be transmitted to amplifier without any loss.
eBay
Copy Sugden IA4 Class A Amplifier 33W Pure Class A Single Ended Amplifier Board
Aliexpress UK
Wireless Bluetooth 2.1 Channel Amplifier Module ZK-MT21. Experience unmatched audio quality and reliability with the ZK-MT21 Wireless Bluetooth Amplifier. 1 Audio amplifier module (not assembled). Why Choose the ZK-MT21 Amplifier Module?.
eBay
Queenway A-300BI 300B 4PCS Integrated Tube Vacuum Amp Class A 18W*2 with Remote & Ca-yin Line Magnetic Tube Amplifier
Aliexpress UK
The AV-MP326BT 12V Car Amplifier by Sunbuck is a digital amplifier with Bluetooth audio input and FM support. It features a karaoke receiver combo, making it ideal for streaming audio and vocals in a car. The sleek black design adds a stylish touch to any home audio setup, perfect for enhancing your sound and vision experience. Upgrade your audio system with this versatile amplifier that combines modern technology with karaoke capabilities for a unique entertainment experience. there few mark on it as seen in pictures
eBay
Phono Preamp Pre Amp Preamplifier Audio Amplifier with Level Volume Control RCA Input Output 1/4" TRS Output for Turntable
Aliexpress UK