I have only bought subs in pairs. Having been doing high end audio, I have learn certain abstract generalities that lead me to make choices without knowing facts. I wouldn’t mix. I would buy one and save to buy the second identical.
when I went to buy my first sub, the rule of thumb was, “you only need one, bass isn’t directional”. That didn’t feel right to me. No logic or reason… it’s the little stuff that matters in high end that add up to a really great system. So, I bought a pair. Over the ensuing years I read article after article as it became the common knowledge that in 2 channel 2 subs perform much better than one. And indeed, when you unplugged on e of my subs, the soundstage would diminish substantially. Why, don’t know, but it really made a difference.
when I went to buy my first sub, the rule of thumb was, “you only need one, bass isn’t directional”. That didn’t feel right to me. No logic or reason… it’s the little stuff that matters in high end that add up to a really great system. So, I bought a pair. Over the ensuing years I read article after article as it became the common knowledge that in 2 channel 2 subs perform much better than one. And indeed, when you unplugged on e of my subs, the soundstage would diminish substantially. Why, don’t know, but it really made a difference.