The only thing I did was open the amplifier and clean the input board because the input channel selector wasn't working properly. I cleaned the outside a bit but it still needs to be cleaned both outside and inside.
eBay
Fosi Audio Q4 Mini Stereo USB Gaming DAC & Headphone Amplifier Audio Converter Adapter for Home/Desktop Powered/Active Speakers
Aliexpress UK
This magnificent unit has a brilliantly clear and huge sound with a stunning low end. It has plenty of inputs too. You won't be disappointed with the aesthetic or performance of this unique and very high quality amplifier.
eBay
WM-333 12V 580W 4 Ohm Hi-Fi Audio Stereo Amplifier for Music, Raspberry Pi, Panodra box Arcade Game console Accessories
Aliexpress UK
With a sleek black design, this amplifier features a variety of audio inputs including tuner, phono, CD, aux/vid, tape1, tape2, and mic, making it versatile for connecting a range of audio sources. Quality amplifier from Japan with a substantial output of 50W per channel.
eBay
1PCS 6*25MM 13A HIFI Silver alloy Fuse /Nano Fuse CD Audio Amplifier Tube Amp Fuse 250VT Slow Blow Fuse British Standard UK
Aliexpress UK
The SPEC RSA-717EX Integrated is a powerful 50w amplifier designed for vintage values using modern technology. Please research the in-depth reviews available to understand why this is such a special piece of equipment and rare opportunity. Some case marking is reflected in the asking price but operationally it is in perfect condition. The wooden side panels which the unit rests on show signs of wear but the front panel is unmarked. The company design goals for musicality and realistic sound reproduction are immediately obvious. As an example, a singer I am familiar with, both performing and in conversation, now shows the detailed character of his spoken voice in recordings. Original packaging.
eBay
Herdio 4-Way Home Power Amplifiers Audio Bluetooth & Aux Mini Amplifier for Bathroom Wall Ceiling Speakers EU/US/UK/AU Plug
Aliexpress UK
LFD Integrated Zero.
eBay
Woopker Mini Digital Amplifier X24 Max 100W Bluetooth 5.0 TPA3116 HiFi 2.0 Channel Stereo Audio Power AMP for Home Car
Aliexpress UK
But to be honest it's so small I haven't noticed it. Hopefully video / pics show it.I've included a specific pic of the mark itself. -- 2m Chord Rumour X speaker cable. -- Amphion Argon 3S speakers.
eBay
5PCS RV16MM Flat Foot With Turntable B5K B10K B50K Power Amplifier Volume Radio Potentiometer With Switch 16MM (5 Sets)
Aliexpress UK
120W per channel into 8 ohms (or 200W into 4 ohms) and features a proprietaryClass XD technology for high efficiency and low distortion. Its key specifications include a frequency response of. Multi-room Support: Can be integrated into a multi-room system with an external Incognito keypad.
eBay
16-300Ω HiFi Headphone Amplifier Portable 3.5mm AUX Audio Receiver Music Player Earphone Amplifier For Phone With 3.5MM Cable
Aliexpress UK
Wide-range DC pre-main amplifier. Power Amplifier Unit. Weight 20.8kg. With Rack-Mount Adapter : Width 482x Depth 455 mm. Load impedance 4 ~ 16 Ω. Headphone jack output 120 mW (8 Ω). Subsonic filter 16 Hz (-3dB, 6dB/oct.).
eBay
Golden Voice Accuphase E405-MOD L9 150W 8R Mono/Dual Channel Pre-Stage&After-Stage combined Power Amplifier KITS/ Finished Board
Aliexpress UK