Most economical way to ship large speakers?

Dealers seem to pay way less than whatever I find on multiple sites.  I have heard Parcel Monkey but not used personally.  If you are buying new from a dealer I would ask to purchase a shipping label from them.

When I shipped two big subs from Maryland to BC Canada, the buyer purchased the shipping and emailed me the label from FedEX and they picked them up from my garage!  

I used Uship to deliver my Vandy 3a sigs. It was easy to set up and the delivery went smoothly.

Bob

Agree with above advice, try UShip. I had an awkward pair of Dahlquist DQ-10s brought from Chicago to Tulsa for half what others were charging. 

UPS will pick them up from your house....pack them well and track them

 I work in the shipping industry as a truck driver. I assure you that you will find some shipping options cheaper than others.  I can also assure you that the cheapest ones are most likely to destroy your freight. They will probably even give you a hard time when you file a damage claim. I would talk to some freight brokers at length, discussing not just shipping cost, but also insurance, willingness to honor a damage claim, reputation etc.  I myself will not offer my opinions on who to use. That would make too many people in my field unhappy. You want absolutely guaranteed damage free delivery? Rent a trailer or a small truck.