Pre-amp with Marantz receiver?


I own a Marantz SR-9300 receiver and am looking to improve the 2-channel performance. I think the amps in the receiver are probably pretty good, and am wondering if there is any value in using a separate pre-amp (which I understand is often the weak point in receivers).

The receiver has inputs called 'Main Amplifier Inputs' which, according to the manual, 'may be used to connect an external source to the the internal amplifiers'. Could I connect a two channel pre-amp to this input? Do you think it would make a noticeable improvement? My source is a Marantz SA8400 sacd/cd player, with redbook fed through a Bel Canto DAC2, to Elac 207.2 speakers.
baileyincanberra
As you peer over the top;from the front of the sr9300-- on the right side of the receiver there is a row of flat black connectors U shapped;when removed.--Make sure you unplug your sr9300 first.--- the top 2--slightly to the right of the didital inputs-row -- pull them out with your finger nails. They are only 1/2 in. deep---You can just line them up and push them back in to get acquainted with how they come in and out. Still peering over the top/ from the front--The left front channel out-is the top/ and right-front-out is just below.-----That is where your ic's go---to the input of your outboard amp.--Now that you know what ic's are.
From the same position --looking over to the back of the unit---after the U shaped plugs have been removed-- the ic's go in on the right side of where these plugs came out. These actually connect the 'pre' part of your receiver to the 'amp' part of your receiver.---In that you would be using a different amp;you wouldn't want these connectors in place.
Thanks very much for the help. I've got my eye on a Musical Fidelity amp that looks like it would fit the bill quite nicely.
hi what kind of amplification are you using now
i just got the fs 207.2
thanks a lot norman