Some Basic Center Channel speaker reccomendaitons

soix. Thanks for the reply. Budget is $600ish. Looking for something that will be placed on the top of my tv stand under or in front of the tv. I have good depth and width...but the bottom of my tv is just about 7.5...so figuring a limit of 7 inch to be safe....

Room is 34 long by 20 wide...but we sit on bean bags on the floor only about half way back and there is an large  L shaped portion in the back and to the right so its actually smaller ....

Thanks

Unless you find a center that is voiced the same, it's not worth it.  So, either find a smaller pair of ADS with the same tweeter and mid, have one built or don't use a center.  You can save $600 and set your pre on phantom mode.

Now this is for non critical TV?Movie listening so I’m not expecting a perfect or even ideal match.
My only requirement is it I’d like to keep it seven inches or shorter

How about a sound bar?
https://www.google.com/search?q=sound+bar&client=firefox-b-1&source=lnms&tbm=isch&sa...

Agreed.  Those ADS 1090 have a rather unique looking midrange and tweeter.  I can be close to impossible to find a matching center channel  for this.  You could try, but expect to have mismatched sonic signatures.  You are likely better off starting from scratch and getting matching components if you want a 3-channel system.

If you're not up for buying three matching speakers, what about just setting your prepro or AVR to "phantom" for center channel (if you haven't already) since this is for non-critical listening?

If you're definitely keeping your speakers that you're obviously not going to be able to match and this is non-critical listening, I'd go for something neutral that goes reasonably low so at least you'll have clarity and fullness of vocals.  Nothing worse than muddy- or boxy-sounding or shrill- or thin-sounding vocals from a center speaker.  Under these circumstances I don't think you need to spend all that much either.  Here's a very good one for $269.  I know someone who has one and it's neither bright nor warm, and vocals sound very neutral and natural through it.  It is a shade over 7.5" with its footers installed, but if you can make it work I think you'll be very happy with its performance.  They offer a generous trial period so you can see for yourself if it works for you.  Best of luck. 

https://www.aperionaudio.com/collections/center-channel-speakers/products/intimus-5c-center-channel-...