When I found that Shelby was selling direct replacement Kicker door subs separate from the $1,200 upgrade kit, I had to jump. Until this set no other aftermarket subs have been available as direct fit in Shaker systems. I purchased from Champion Mustang for $139 Shelby subs. The 8" shallow mount subs say "CVT" on the speaker cone so I'm guessing they are from Kicker's CompVT line. I believe they are 2ohm single voice coil for compatibility with the Shaker amps. I've seen the CompVT's online for $75-$125 so the Shelby package price is reasonable. (If anyone is curious, the stock subs are dual voice coil. Each stock sub has 4 wires total with 2 separate inputs. For the Kicker install one of these wire sets is not used.)
I paired these with 4 Kicker KS680 6X8 for the parcel shelf and doors. Found on ebay for about $60 per pair. I also picked up 2 sets of Metra 72-5600 speaker adapter harnesses. (Shelby also sells Kicker 6x8 speakers separately for around $90 a pair. Can't say if they are the KS680 which Crutchfield sells in their "Signature" line for $130 a pair. The DS680 is the next step down in the Kicker line. The DS680's probably sound fine but the price on the KS680's was too good.)
The door install was fairly painless. Just a lot of pieces & parts to get to the speakers! By the way Shelby provides excellent instructions specific to the subs. The generic Crutchfield instructions floating around also provide a good walk-through for all the speakers (and radio). I can scan the Shelby instructions if anyone is interested.
The rear parcel speakers were a different matter. I'd like to meet the brilliant Ford engineer who decided, starting with 2007 models, to mount the speakers underneath the parcel shelf, thereby requiring nearly complete disassembly of the interior. ("Hey boss, I found a way to save $50 off the assembly cost and make life miserable for owners...."). The rears took 2.5 hours alone. The two doors only took about a hour each if that tells you something. I found great instructions at http://mustangforums.com/forum/2005-2009-s197-appearance-section/234158-how-to-07-rear-speaker-replacement-and-mod.html including a "must use" tip when installing the new speakers. Turn the orange mounting clips upside down and mount the speakers from the bottom. No clearance issues with the parcel shelf and easy to replace again if necessary. Way too easy for the Ford engineers I guess.
I can post pictures upon request, including the original factory speakers. How Ford can claim 500 watts from those puny things....
Highly recommended upgrade. Install isn't a breeze but most of us on this forum can handle with a little patience. You'll be rewarded with clean highs/mids and punchy bass. I can't vouch for the sound from the factory head unit but better speakers always help.
Edited by ZepDad, 27 March 2010 - 07:45 PM.