Another new line of Pioneer Speakers by Andrew Jones

They have different grills obviously. I don't see any other differences. What am I missing?

 

Aren't both the tweeters and woofers different on the 22's than the 21's? I'm pretty sure they are.

 

For those interested in these they're on sale at Best Buy for 90 dollars. They also price match Amazon who has them at 87 dollars.

 

Picked up a pair last week on Amazon for $60 new. Still haven't unboxed them yet. For a little 2 channel in my dining room.