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
TOPPING L50 NFCA Headphone Amplifier SE+BAL Input 6.35mm/XLR Output Hi-Res Audio The Best Headphone Amplifier for TOPPING E50
Aliexpress UK
The Denon PMA-520AE Integrated Amplifier Stereo is a high-quality audio component in black, designed for home audio and HiFi systems. This amplifier, with two channels, is from the renowned brand Denon and is the model pma520ae. It offers a sleek and powerful solution for enhancing the sound quality of your stereo system, providing a rich listening experience for music and other audio formats. Ideal for those looking to upgrade their home audio setup with a reliable and high-current amplifier from a trusted brand like Denon.
eBay
22000UF80V 63V 22000MFD 80VDC 100VDC 63VDC 105° 50*80MM Electrolytic capacitor wire cutting machine power amplifier audio filter
Aliexpress UK
EDWARDS IA7 , integrated amplifier , 80watts into 8Ohms , nice sound and condition , remote , mains cable , original box .Only personal pick up please .
eBay
Nobsound NS-13G Mini TPA3116 Digital Power Amplifier Class D Stereo Desktop Audio Amp 100W+100W for Home Stereo Speaker
Aliexpress UK
With a power output of 50w + 50w, this amplifier is perfect for boosting the audio signal from your various audio sources. It features multiple inputs including phono, tuner, DVD, CD, aux, and line in, making it versatile for connecting a range of devices.
eBay
AIYIMA 1 Pair GE 5654W Vacuum Tubes Valve Vacuum Electronic Tube Upgrade For 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers
Aliexpress UK
Two Power cables supplied one standard and one special. Sound Quality Neutral and balanced sound signature. Power Output Pre-out RCA outputs for connecting to external power amplifiers. The unit is in excellent condition.
eBay
Digital Audio Power Amplifier Professional 4 Channel 4x1650w Subwoofer Preamplifier DJ Line Array Speaker Stereo Sound Amplifier
Aliexpress UK
56 Penybryn.
eBay
Aux 3-4 Logic Level Function Amplifier Board for 21MTC Decoders/LaisDcc
Aliexpress UK
NAD C542 HDCD Compact Disc Player. NAD C542 CD Player. • NAD C542 CD Player. NAD C352 Stereo Integrated Amplifier. NAD C352 Amplifier. • NAD C352 Amplifier. • HDCD compatible. A superb quality NAD hi-fi stack in full working order.
eBay
Woopker AK390 BT 5.0 HiFi Power Amplifier 400Wx2 Stereo Digital AMP BASS Media Player Supports FM Radio AUX Microphone Input
Aliexpress UK
UNIT IS IN USED CONDITION. TESTED & WORKING. ORIGINAL REMOTE INCLUDED. EXCELLENT HIGH QUALITY UNIT. AMAZING SOUND. GOOD WORKING ORDER. COSMETICALLY SOME RUBS / LIGHT SIGNS OF USE / WEAR. CONSULT PHOTOS FOR EXACT ITEM YOU WILL RECEIVE. TESTED & WORKING. USED CONDITION.
eBay
TOPPING A70 Pro Fully Balanced Headphone Amplifier 17000mW*2 Relay Volume Control Pre Amp wiht Remote Control
Aliexpress UK