urgent speakers faint in 2.4 type s 2003

Hello everyone I own a Honda accord 2.4 type s 2003. This car was recently a victim of the floods in the north west and caused for the car to be submerged from the front on boxing day. As the car has so much sentemental value the insurance wasn't getting their hands on it. After replacing the ecu and immobiliser the car works and the restoration process begins. The one part I'm having difficulty with is the stereo. I have replaced it from the standard one disk stereo to the 6 disk changer stereo and replaced the two front speakers and no more. However the sound is faint and even on the highest on 40 it is low and not loud at all I would like to know if anyone at all can help me out as to determine what the issue is here thank you

If you've replaced it with a 'premium sound system' version, which I believe the 6 disk unit is, then it requires a separate amp as it only puts out line levels. This honda amp usually lives behind/below the big cd cubby hole in the centre console, below the head unit.

I've been planning to do this mod on our saloon, as I picked up a head unit fairly cheaply, but haven't gotten around to getting an amp and the wiring harness.

Thank you miah as I responded in the other forum apologise for the spam of such topic I think to this could be it as I do not have an amp which therfore is the reason the sound is not coming out loud and only faint I just hope it works and I will be in response on all of the forums I posted this topic in as to whether or not it worked thank you