I use for example an Edifier powered speakers...
It would be foolish to discard the Edifier sub designed for it at a low cost price...
it is amazingly good system for the price... I will not upgrade it which was my intention after buying only the small speakers ...
But generally it is better to look for any compatible component from any company if the S.Q. /price ratio is probable and the electrical synergy assured ...
There is no rule here except common sense ....

