Look What Fits In Rear Speaker Location..C6 Vert
 

https://cimg9.ibsrv.net/gimg/www.cor...1b67370ce1.jpg
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Put some new old stock Boston Acoustics RX67 speakers in rear stock location on my 2006 convert... and they drop right in and the stock factory grills fit over them with small mod of removing a few of the mounting tabs ..Seems the older Boston speakers were a little smaller in diam than what you find today with 6.5 speakers.. just throwing this info out there..and a few pic's.. :)

How do they sound with top up and down?

Not bad.. Thought i may not like the rear's wired in, but after i adjusted my alpine INE-W960HDMI and the speaker distance im liking it... And they blend good with my Steg speakers i have up front..