Roland68
Major Contributor
If you have a small budget, the Aiyima A07 Pro recommended by @Multicore would be a much better choice. There is currently a good offer for the Aiyima A07 Pro with 35v (€72.50) and 48v (€77.50) power supply on Aliexpress. A Fossi V3 would be more expensive.The fx-audio fx502a pro is without controls
Alternatively, you can check out your local used market. Sometimes you get lucky and someone sells an old but good used amplifier for very cheap. Old treasures, such as a Technics, Onkyo, Pioneer, Cyrus one (the first), NAC (3020, 3xxx or 3xx series) or even old Sony stereo amplifiers can be bought used for € 30-100 and would fit well with your system .