Watt Puppy 5 Vs 5.1

[RH67]

Several decades ago a friend had a pair of Watt Puppy 5`s and at the time it was one of the best speakers that i had heard but at that time in my life (divorce) they were out of reach money wise. They left a big impact on me.

Recently i have been considering new speakers i currently have Devore Nines so i decided to look for used Wilson speakers particularly the 5`s and in looking i have noticed a 5.1 model. I have searched online trying to find the differences between the 5`s and 5.1 to no avail.

My question is what is the difference? In the used market price wise they are about the same 4-5k range. I have not kept up on Wilson speakers for quite awhile so any help is much appreciated.