got it, and only reason i am getting the Nine.5 is because i just want one solid amp, and the Nine.5 puts out 450 RMS for the sub, but i plan on using the headunits crossovers, because i want the cleanest sound possible, and thats the only reason why i bought that headunit.
But check out the specs on the Nine.5, it might be a great amp?
http://www.edesignaudio.com/edv2/product_info.php?cPath=22&products_id=550
3 Level Inputs Individual inputs for 3 channels are integrated into the NINe.5 amplifier. 2 front channels and the independent subwoofer channel.
0Awg Capable Such a beast of amplifier requires a beast of a connection. The NINe.5 amplifier comes out of the box ready to fit wire as large as 0/1 eNETIC cable.
Adaptive Input The NINe.5 input section allows you to use inputs from 1 channel or 3 channels selectable externally right on the amplifier.
HP/LP/BP Crossovers Included The NINe.5 features a unique crossover to it's design. Full Low Pass / High Pass / Bandpass capability on all 4 front channels @ a 18dB slope. Ranging from 50Hz to 4KHz it gives you a fantastic range of control for the most demanding systems
2 Stage Protection Circuit The NINe.5 protection circuit design is unique in it’s integration isolating the front and rear channels independently from one another. If your driving one part of the amplifier too hard it’s active communication system protects the entire amplifier. The front 4 channels and 5th subwoofer channel are independently protected.
Dedicated Subwoofer Channel Crossover The subwoofer crossover section ranges from 40Hz - 100hz @ 18dB w/ very simple toggle On/Off switch allowing you to use the onboard crossover or digital X/O from your head unit.
Easy Connections The NINe.5 features very simple connections on all channels. Fully housed connections protect one another while increasing speed and reliability of installation.