Volume Control for second set of speakers


Hi guys, anyone have a recommendation for volume control so that I could lower the volume on the “B speakers” from my amp.

I’ve got two sets of speakers in a large room and I just want to turn one set down a little to blend them better.

Something like this thing:
https://www.monoprice.com/product?p_id=8231
But maybe better? Or maybe this thing is perfect? Anyone have one?

thanks!!
leemaze
Used a Niles speaker attenuator for deck speakers for years...works beautifully with little noticeable effect on tone...plus...deck speakers for outdoor use...who cares? 
@wolf_garcia yeah my dad had one for the dining room speakers when we were growing up. Not sure what happened to it...

the speaker connection is unfamiliar to me - do you think these Lil Piggies would connect properly?
https://www.parts-express.com/lil-piggies-binding-posts-to-lead-wire-adapter-set-red-and-black-pair-...

Those "lil piggies" would work perfectly with the Niles attenuator, or whatever that thing is. I may have to get some of those.