An inexpensive sound card easy to integrate that can handle up to 8 bass shakers ! Available on Aliexpress from 25€.
The most economical solution is also the most practical: use the sound card integrated in the motherboard.
Assetto Corsa Competizione (ACC) is a simulation focused on two disciplines: GT3 and GT4. In both cases, the management of the electronics is essential.
The Sinus Live is a very convincing midrange bass shaker!
The Aiyima amplifier is a 4 channels amplifier, 50W by channel. Would you like a bass shaker per wheel?