replacements you could retrofit onto your Marantz 2500 receiver if you don't mind a possible irreversible modification.  Drill the rivets out which secure the existing terminals, desolder and remove them and find a suitable replacement to solder and secure in place.  Looks like it will be pretty tight but you should be able to find something that works.  If there is a small circuit board attached to the terminals you might have additional wiring to do for adding new terminals.

http://www.classic-audio.com/marantz/pics/r_2500.jpg

Look at post 34 in this thread http://www.audiokarma.org/forums/sho...t=80113&page=3

Thanks Jackfish but I could not see the images.  Here's what I get:

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Do you think you can send me those pictures for the final product?  I will greatly appreciate it.

Ok, I just got an email from them that "I am approved" and I managed to see the works.  This happened barely two minutes after I sent you this.  Impressive timing!  Very good work.  I wonder if I can actually do that myself or if I can dedicate the time for it, but I should have it in mind anyway.  

I guess for the time being I will get cables with spades and adaptors to use with the existing pin outlets.  How does that sound as an idea?  I guess the sound of the music will not be quite as good with those adaptors but anyway...