I can tell you that your odds of being able to get through a complete low bass note song cranked is slim. Although yellow tops are made for systems, I've had both a red and yellow top and alternator just cannot keep up with the amount of power the amp is demanding. I just have 1 12" 1200watt sub wired at 1ohm with a red top and 2farad capacitor and It still cuts out. OHMs is a big factor though when you wire those subs. How many ohms are you going to wire them at? 1 or 2, you might need more power, but 4 ohms you should be fine. Don't listen to the stereo shop about the second battery though, I'd upgrade my alternator before adding a second battery.
00 White Ranger XLT Extended Cab
Truck has sorta went back to stock but still have
03 Sport Trac Cluster, 5% Tint Rear 20% Front, Auto Lamp and Dim Mirror.
6000K HID Conversion Kit, 2/3 Eibach Lowering Suspension, Billet Grill