I think the #1 thing is speaker measurements. This can create a big following and popularity.
#2 is price.
#3 is being able to accommodate your clients. The heart wants what it wants.
If they want modular towers with dual 10” or dual 12” woofers

and you can’t accommodate, then they’re not buying.
If they want powered speakers or passive subwoofers and you can’t accommodate, then they’re not buying.
It seems there are MANY GOOD speaker companies. What sets your company apart?