Hi, I have a denon amp which is mahussive and lots of channels on it.

At the moment I have 6x9's and a sub all wired up to it. I want to amp my front 2 speakers though, will i be able to amp them to the denon amp, or buy a small seperate one??

you need to give folks more info
'lots of channels' isnt exactly informative

Sorry

http://forum.realmofexcursion.com/gallery/showphoto.php?photo=2125

Denon DCA-800

6 Channel Amplifier
Output Power at 12V:
6 x 45W @ 4 ohms (20Hz - 20kHz, 0.1% THD)
6 x 50W @ 4 ohms (1kHz, 1% THD)
3 x 100W @ 4 ohms bridged
S/N Ratio: 100 dBA
Freq. Response: 5Hz 100kHz
Fuse: 2 x 30A
Denon DCA 800 amp

Ditch the 6x9's for a start. They are really not needed. Then bridge 2 channels for the sub and 2 for each of the front speakers.
That is the best that you can do as far as i can see unless you sell the amp and buy something more suitable.