Best Of

Mine were originally CRS Dual Board, I upgraded them to single board CRS+ Fully Hot Rodded.

I owned a set of fully hot rodded 1C’s as well many moons ago, I like the 1C’s but would never part with my CRS+’s for them..

IMO The Monitor 7’s, CRS+’s, and the 2B’s (single board as well) are the three special Polk Speakers that will just about slay any room with the right upgrades and gear. It doesn’t have to be super high end gear, just good power.

Let the magic happen.. 😎

Don’t forget the Dreadnought..🤓

The big difference between them is the 2 board blade/Blade crossovers both blades carry signal. The 1 board pin/blade crossovers, only the pins carry signal, the blades connect to the ground inside the cabinet to the negative binding posts. Therefore you have the ability to use monobloc's or non-common ground amps only then does the blade come into play, with the use of the AI-1 cable or a dreadnought to tie the grounds together.

We don't need no stinkin' time machines 🤣. We have old magazines.

Here's a Polk advertisement with the early 10B with SL1000 and black basket midwoofers and passive radiators and you can see that the Polk Audio badge is now on the enclosure instead of the grille and the grille exposes the bottom panel edge of the enclosure.



So to the OP, you can pretty much rule out that yours are 1984 10B within reasonable odds. If Spock were here maybe we could get the odds.

@DeRod You're right. Those silver basket midwoofers and passives would not have shipped originally with SL1000. And an LOL from f1 is basically a badge of honor around here 😉

Something some seem to ignore. Polk changed just about everything on the fly back then, so it's entirely possible those tweeters are the original ones.

Entertaining for sure...
https://www.reddit.com/r/audiophile/comments/1pk35v8/help_identifying_polk_audio_10s/

Spyro Gyra, Incognito album. Clear and massive soundstage.