Reddit reviews JVC CS-J6930 400W 6x9 3-Way J Series Coaxial Car Speakers

I'd replace the Head Unit and speakers. Even a $69 Pioneer should rock some Decent low watt speakers. what Body style? You probally have 6.5'" in front doors and 5 1/4" in rear deck but may be 6.5" all way around...........some models had rear 6x9s

https://www.amazon.com/Pioneer-S3166BT-Digital-Receiver-Speaker/dp/B07MRFVKKD

BUt you may wanna check speakers 1st and maybe try New speakers on that Head unit............

this One? https://www.crutchfield.com/S-mOsu9Wbf5y2/p_020VZ409/Clarion-VZ409.html ?

https://www.amazon.com/JVC-CS-DR620-Factory-Upgrade-Speakers/dp/B01BTSYE1C

https://www.amazon.com/Pioneer-TS-F1634R-200W-2-Way-Speakers/dp/B0081SRIFS

https://www.amazon.com/JVC-CS-J6930-3-Way-Coaxial-Speakers/dp/B00O53ACRE

https://www.amazon.com/Pioneer-TS-G6930F-3-Way-Coaxial-Speaker/dp/B07594MRH2

when time comes for sub and amp I'd just Buy New Cheap stuff on Amazon. Right Box and Cheap subs can Hit Decent. I've Been out of Car Audio for a while - had a Budget Car Audio Shop for 3 years 2000-2003 and Installed Many a Pyramid/Legacy/Lanzar amp. Bought a Used Silverado 2 years ago and decided I wanted a lil something in it and installed a single $22 10" Sound Storm sub and $45 Pyramid amp. Surprises the Chit out of People when I tell them I got a $22 sub and then they Hear It.......

https://www.amazon.com/Sound-Storm-SS10-Single-Subwoofer/dp/B0002VM8QG

you should be able to Find multiple youtube videos on civic speaker replacement..........

Would any speaker work as long as it's a 6x9? Like this:

https://www.amazon.com/gp/aw/d/B00O53ACRE/ref=pd_aw_vtph_107_lp_3?ie=UTF8&psc=1&refRID=ECDTEBXVDNS6NEMKZCTM#nav-search-keywords

Also, online forums mention an optional front speaker that's a 4x10, would it be easy to install? I really want more of a surround sound instead of just rear audio