Terrible idea!
In terms of overall sound profile Spendor vs Paradigm could not sound more different at a base level. The Paradigms are MUCH more forward.
This is not a bad thing but if you were to swap in Spendors for your Paradigms and assume they will just go a bit lower, man will you be disappointed.
If you want deeper bass response, add a sub or two or consider a larger speaker from the same manufacturer unless you want to replace your electronics in this case. Otherwise, if you want to switch manufacturers, you need to hunt another speaker down that is similarly forward.
In terms of overall sound profile Spendor vs Paradigm could not sound more different at a base level. The Paradigms are MUCH more forward.
This is not a bad thing but if you were to swap in Spendors for your Paradigms and assume they will just go a bit lower, man will you be disappointed.
If you want deeper bass response, add a sub or two or consider a larger speaker from the same manufacturer unless you want to replace your electronics in this case. Otherwise, if you want to switch manufacturers, you need to hunt another speaker down that is similarly forward.