HELP FedEx Mangles Speakers - Refuses Claim

Assuming that you had the required 4" of cushioning on all sides (even if you didn't use the manufacturer's box) and insurance then I would strongly recommend filing a small claims action against Fedex. This is probably the most effective and quickest way to reach a resolution.

Zippyy.
Ground is a level of service.(The lowest) Could have been shipped many other ways.

Fed Ex and UPS have packing guidelines required to qualify for insurance claims. I don't believe original boxes is one of them, but it might help (more on this below). There needs to be at least 2" of cushioning around the entire box. But here's the kicker, the package needs to be able to withstand a fall of at least 4'! In my opinion, no piece of heavy audio has a chance of that happening without some sort of exterior (or interior) damage. Shipping heavy items ground is very risky.
As for original boxes- I had a pair of mono blocks delivered to me both with damaged transformer covers. They were in the original boxes. But, they were heavy, and the boxes were old and very used looking. Plus the original boxes, even when new, were garbage. There was no cushioning at all at the top, just doubled up on the box flaps! Needless to say, no insurance coverage.

Zippyy-
"I bet they were shipped ground?"
How else are they going to arrive at your door?
What a stupid comment."

This is not a stupid comment. What Slikric3000 is saying that Fed Ex ground is probably the worst choice to make for shipping heavy items. And I agree.

Your other choices are Air or Freight. Freight, strapped to a pallet, is the best option for heavy items. Less risk for a human dropping it but still a risk of a fork lift puncture.

Also, the seller/ shipper has the responsibility to ensure the package arrives safely to you in as advertised condition. Like Bill mentions above, "it is the shippers (sellers) responsibility to make you whole not the shipping company"
Did you use PayPal for payment? If so PayPal usually takes side with the purchaser in these types of issues and will make sure you get your $$$ back.

From years of experience in shipping many turntables, amps and speakers, I will agree that there is no substitute for the original packing material, especially form fitting styrofoam isolation. But that is seldom at hand for speakers or vintage gear. UPS is the worst for incurring damage and denying claims (exception noted below), but FedEx is getting almost as bad.

I do ship via UPS, but only via their pack and ship option. Take your item to a UPS store and pay them to pack it. Items packed that way are seldom damaged, and when it does occur they cannot claim that your item was packed incorrectly. It costs a little more, but my buyers and I both agree that it's worth the cost.

USPS. That's right, the good ol' Post Office. All in all, I have fewer satisfaction issues with goods shipped this way than via UPS or FedEx. For small items, the flat rate boxes are great. Use Priority Mail and avoid Parcel Post if possible.