? cartridge should match vintage marantz reciever

Thanks for the response. I'll try setting the cart. up from scratch again.

Top of the line Shure doesn't probably have enough output for your receiver's phonostage. OR contrary your phonostage is designed for MC cartridge while you have MM cartridge.
Budget Solution to your first problem:
Since you've already paid big bucks and don't want to loose them you should acquire an outboard phonostage with higher gain. Sumiko phonobox or Nad PP1 comes onto mind and will straighten your problem.
Solution to the second:
Replace an input resistor(physically remove and place different load with soldering iron) or if adjustable adjust load resistance to 47kOhms. Inspect inside and outside the box if such could be adjusted via switch.

Your 2325 is an awesome receiver- with it's warm buttery sound the Shure should be quite the match for it.

I certainly agree with Elizabeth and would give her ideas a try.

Once you get the combination dialed in you are assuredly in for a treat, sitting back with pretty blue lights and great sound!

Let us know how it turns out--

Richard