i know if you wire two 8ohm subs parallelyou get a 4ohm load. I have also heard that when you bridge and amplifier it cuts the ohms in half. So if you wire two 8ohm subs in parallel can you bridge them to the amp or will this be equal to a 2ohm load and not work.

Also, when wiring speakers in parallel should both subs connect directly to the amp or should the +'s and -'s of the subs be wired together and only one sub wired directly to the amp

Any advise would help