Re: SPECTRUM XLT AND THE BIGFOOT COIL
My DFX went and the XLT stayed. Great machine.
You can't compare the Prism/Classics etc as far as the Bigfoot is concerned as you need the XLT's range of adjustments, especially recovery speed, to get the best from the coil.
You should be able to get about the depth of the six inch Whites coil, but thats quite a deep coil in junky ground.
The stock 9.5 coil does suffer from target masking and in general the 8" is a better choice for general hunting.
The Bigfoot suffers less powerline interference and has a degree of inbuilt ground rejection. Just make certain you get the correct version for your detector, there's a few, and ground balance at 45 degrees to the ground. I shorten the shaft and don't lock the shaft buttons in the shaft. Lock the shaft with just the camlock and when you catch the ground (as you will when starting out) it allows the coil to revolve rather than cracking the coil lugs. Experiment with recovery speed. Remember its only really a 2.5" coil for all of the near 18" length.
Don't forget the XLT has a control specifically for the Bigfoot (Absolute Value) to allow the live area of the coil to be increased or reduced.