Help! I have "hopefully" a simple wiring problem/question with my subwoofers.

[Rolex Snob]

I have a 2002 X5, in the trunk is a hifonics Brutus 1200w amp powering two JL 10w6v2 subwoofers.

The amp blew up and I went to replace it, in a moment of stupid I did not note the speaker cables before I disconnected them from the old amp.

I believe my installer had them at a 1ohm final load because I had the + on input 1 and - on input 2 in use.

My problem is that I don't know which is + and which is - from the subs, the crappy speaker cable isn't labeled. Without tearing the subwoofers out of the enclosure is there an easy to way tell which end is + and which end is -? I don't want to hook them up out of phase because I assume bad things will happen when they are wired up for a 1ohm load.

[ncx]

If you really don't want to unmount the driver to look at the polarity, you can use the down-and-dirty installer trick which is a 9v battery.

Apply the battery to the speaker leads, noting which wire is touching the + side of the battery. If the speaker moves out, that is the correct positive wire (mark that wire so you will know it is positive). If the driver moves in, that is the - wire (and would be an out of phase condition if you wired that lead to the + side of the amp.) You are applying a small amount of DC current so only touch the battery long enough to see the cone move. Do a google search for more info on the topic. YMMV, no warranties implied, yada yada yada

[Rolex Snob]

Thanks! I knew there was a trick but wasn't sure what it was.