This compact Bluetooth audio amplifier allows the connection of Bluetooth devices to low impedance speakers via the built-in power amplifier. It also has an auxiliary input so devices can be connected by 3.5mm jack connection.
eBay
6.5-inch Maze Speaker Empty Box,Full Frequency Sound Box,Coaxial Horn Box,DIY Speaker Wooden Housing,1Piece Home/Car Speaker Box
Aliexpress UK
Ideal for audiophiles seeking a pristine and powerful audio reproduction that brings every detail to life. 1x 3.5mm headphone amplifier. --Guitarists' Secret Weapon: Unleash the full potential of your guitar with our headphone amp, tailored for musicians.
eBay
3-inch Maze Speaker Empty Box,Full Range Speaker Box,DIY Speaker Housing, Car/Home Woofer Box,2Piece Sound Box,Hole 72mm/77mm
Aliexpress UK
The Eagle P649BC 2 x 30W Compact Desktop Stereo Mixer Amplifier is a versatile and powerful solution for portable and remote audio applications. The 12Vdc power option allows you to run the amplifier from a car, boat, or vehicle battery, making it perfect for remote and portable applications.
eBay
SOTAMIA 1PCS 1.75 Inch Box Speaker with Bass Dual Radiation Basin Passive Small Speaker Neodymium Magnet Full Range Speaker
Aliexpress UK
Vintage 1980s Trio KA-2002 Solid State Stereo Amplifier In Original Box MINT GWO Item is in a very good clean condition - some slight polystyrene stuck to the cable where it has been placed back in box while still warm. Good working order, however the power indicator bulb has stopped working so could do with getting replaced. Beautiful condition of original box. Item will be sent well protected to ensure no damage is made through transit.
eBay
SOTAMIA 2Pcs 2 Inch Mini Full Range Speaker Audio 4 Ohm 12W Long Stroke HIFI Power Loudspeaker DIY Sound Music Bluetooth Speaker
Aliexpress UK
G4 can be used as full frequency amp or subwoofer amp with the B/M switch to connect different speakers, and with 3.5mm AUX and RCA input to compatible with different audio devices. 2PCS G4 can be used to drive left and right channel independently to avoid mutual interference.
eBay
BT Speaker Dual Speaker Stereo Outdoor Tf USB Playback Fm Voice Broadcasting Portable Subwoofer 50 Wireless Speaker
Aliexpress UK
350W Subwoofer AMP Mono High Quality Amplifier Board Finished DIY Speakers. Model: 350W subwoofer power amplifier board. Output power: 350W. 1pc350W Subwoofer AMP Mono High Quality Amplifier Board Finished DIY Speakers.
eBay
ZEALOT-S56 Portable Bluetooth Speaker Wireless Outdoor camping Speaker, Bluetooth 5.3 Streaming,IPx6 Waterproof Speaker
Aliexpress UK
Unique and amazing combination: integrated ST-01 amplifier with VU meter into whole in such a mini size, the pointer dancing in the warm light with strong vintage feelings when enjoy HiFi music, dynamically decorates the audio system space. HiFi clear sound with tone control: resonable circuit and concise wiring, adopts vacuum tubes to soften the sound and filter out the digital feelings, sounds warm and sweet without noise. Also with treble and bass knobs to adjust one's own preferable sound styles, presents HiFi music with rousing highs and deep lows.
eBay
AIYIMA Mini Audio Portable Speaker Column 44/50MM Full Range Vibration Speaker Altavoz Portatil Resonance Speakers For Computer
Aliexpress UK
2.1 channel Bluetooth amplifier: NS-14G Pro features Bluetooth, RCA, and AUX inputs, along with AUX, speaker, and SUB outputs, making it compatible with a wide range of audio sources, including smartphones, laptops, computers, CD/DVD players, and TVs. Equipped with the QCC304X Bluetooth chip, it supports advanced audio codecs like aptX/aptX-HD, ensuring low power consumption for extended battery life and robust connectivity that minimizes dropouts. Powerful output with dual TPA3255 chips: utilizing 2PCS TI TPA3255 chips, NS-14G Pro delivers an impressive maximum output power of 300W per channel (L/R) and 300W for the subwoofer. With the equipped 48V/5A power adapter, it can easily drive most home passive speakers and subwoofers. Alongside its high power output, the high-quality amp chips.
eBay
Zealot-S72 Portable Bluetooth Speaker Wireless Speaker TWS Bass Stereo IPX6 Waterproof Loudspeaker 10H Playtime,For birthday
Aliexpress UK