How hard it is to replace the rca input on the shindo amplifier?

Thanks Czarivey.
It requires soldering. I am afraid the rca jacks will be damaged by the heat of the soldering. Any way to avoid it?
thanks

They charged 100. Is it reasonable?

Thank you for your kindness Mofimadness. I really appreciate that. Unfortunately, i live in Southern California. With the support of all of you, I think I will try to do it myself.
Now it is time to go to Home Depot for the solder. I will report back.
Thanks all of you for giving me advise.
Calvin

Thanks George. 
I bought extra jacks. I think I am able to do it.
Calvin

@auxinput,
how about metcal ps-200. There is one used closed to my home selling for 125.
thanks

Hello,
I have just finished a first project beautifully. Made a home made interconnect with silver conductor ordered from Tempo Electric. My system sounds wonderful with the new interconnect. I will do the amp over weekend after buying a good soldering iron. Is the Weller WES51 good enough?
Thanks to all who had encouraged me in doing it the first time.
Calvin

Thanks Auxinput.

Thanks Auxinput.
I did some researches about the Soldering Station and am getting more confuse. Cannot decide of which one I should buy. There are 2 price range. Around $100 and $300. I can afford $100 now. Since i dont do soldering for a living. Will the $100 range station good enough for mu need. I am thinking of the hakko 888 now.
Please give me your best advice.
Calvin

Yes, I picked it up at a local electronics store near my house. I spent around $130 for the wes51, one extra iron tip, and a small can of flux. 
Thank you.
Calvin

Hello AG members.
I am happy to report back that I have just finished replacing the RCA input jacks BY MYSELF. It took about 30 minutes.
Thanks all of you. Now the bass distortions are all gone.
My system never sounds this good. So clean and clear. 
Thanks.
Calvin

Any reccomendation on De-soldering device?

Switchcraft 3501RF is what I used. very cheap