i Currently have this for a system.

HU: Sony CDX-GT340/CDX-GT34W Xplod CD/MP3 Car Stereo w/ Aux (CDXGT340)

4-Channel Amp: Kicker ZX460 30W X 4 Car Amplifier - Features & Specs at Crutchfield.com

Sub: Clarion PXW1251 Component Car Subwoofers - Car Subwoofers at Onlinecarstereo.com

Sub Amp: Clarion APX1301 - Monoblock Car Amplifier, Power Amp - Sonic Electronix

basically what im wanting to do is put a second sub in. I know it would be best buying a new monoblock amp for it but ill be stuck with the other amp as i dont who would buy it. So what i was wanting to do was just buy the exact same amp and just run each amp to its own sub. Do i have enough preouts for that or would i use a distribution block or how would i go about making this work?