DOOOOD....
the information is right on the pages of the gain setting and amp setting tutorial.
U need to download/burn your test tones 0db is probably best for you. Disconnect your speakers, hook up your dmm to the outputs and get your desired voltage. Set your HU at 3/4 its volume and turn up the levels to get the voltage at your amp representing the amount of power you want. ALL this info is on the guides. Here is another link that can really baby someone along.
http://mobile.jlaudio.com/support_pages.php?page_id=143
here are numbers.
Table:50 Watts -- 1.0 Ohms, V=7.07 -- 2.0 Ohms, V=10.0 -- 4.0 Ohms, V=14.14 -- 8.0 Ohms, V=20.0
100 Watts -- 1.0 Ohms, V=10.0 -- 2.0 Ohms, V=14.14 -- 4.0 Ohms, V=20.0 -- 8.0 Ohms, V=28.28
150 Watts -- 1.0 Ohms, V=12.24 -- 2.0 Ohms, V=17.32 -- 4.0 Ohms, V=24.49 -- 8.0 Ohms, V=34.64
200 Watts -- 1.0 Ohms, V=14.14 -- 2.0 Ohms, V=20.0 -- 4.0 Ohms, V=28.28 -- 8.0 Ohms, V=40.0
250 Watts -- 1.0 Ohms, V=15.81 -- 2.0 Ohms, V=22.36 -- 4.0 Ohms, V=31.62 -- 8.0 Ohms, V=44.72
300 Watts -- 1.0 Ohms, V=17.32 -- 2.0 Ohms, V=24.49 -- 4.0 Ohms, V=34.64 -- 8.0 Ohms, V=48.98
350 Watts -- 1.0 Ohms, V=18.70 -- 2.0 Ohms, V=26.45 -- 4.0 Ohms, V=37.41 -- 8.0 Ohms, V=52.91
400 Watts -- 1.0 Ohms, V=20.0 -- 2.0 Ohms, V=28.28 -- 4.0 Ohms, V=40.0 -- 8.0 Ohms, V=56.56
450 Watts -- 1.0 Ohms, V=21.21 -- 2.0 Ohms, V=30.0 -- 4.0 Ohms, V=42.42 -- 8.0 Ohms, V=60.0
500 Watts -- 1.0 Ohms, V=22.36 -- 2.0 Ohms, V=31.62 -- 4.0 Ohms, V=44.72 -- 8.0 Ohms, V=63.24
600 Watts -- 1.0 Ohms, V=24.49 -- 2.0 Ohms, V=34.64 -- 4.0 Ohms, V=48.98 -- 8.0 Ohms, V=69.28
700 Watts -- 1.0 Ohms, V=26.45 -- 2.0 Ohms, V=37.41 -- 4.0 Ohms, V=52.91 -- 8.0 Ohms, V=74.83
800 Watts -- 1.0 Ohms, V=28.28 -- 2.0 Ohms, V=40.0 -- 4.0 Ohms, V=56.56 -- 8.0 Ohms, V=80.0
900 Watts -- 1.0 Ohms, V=30.0 -- 2.0 Ohms, V=42.42 -- 4.0 Ohms, V=60.0 -- 8.0 Ohms, V=84.85
1000 Watts -- 1.0 Ohms, V=31.62 -- 2.0 Ohms, V=44.72 -- 4.0 Ohms, V=63.24 -- 8.0 Ohms, V=89.44
1100 Watts -- 1.0 Ohms, V=33.16 -- 2.0 Ohms, V=46.90 -- 4.0 Ohms, V=66.33 -- 8.0 Ohms, V=93.80
1200 Watts -- 1.0 Ohms, V=34.64 -- 2.0 Ohms, V=48.98 -- 4.0 Ohms, V=69.28 -- 8.0 Ohms, V=97.97
1300 Watts -- 1.0 Ohms, V=36.05 -- 2.0 Ohms, V=50.99 -- 4.0 Ohms, V=72.11 -- 8.0 Ohms, V=101.98
1400 Watts -- 1.0 Ohms, V=37.41 -- 2.0 Ohms, V=52.91 -- 4.0 Ohms, V=74.83 -- 8.0 Ohms, V=105.83
1500 Watts -- 1.0 Ohms, V=38.72 -- 2.0 Ohms, V=54.77 -- 4.0 Ohms, V=77.45 -- 8.0 Ohms, V=109.54
1600 Watts -- 1.0 Ohms, V=40.0 -- 2.0 Ohms, V=56.56 -- 4.0 Ohms, V=80.0 -- 8.0 Ohms, V=113.13
1700 Watts -- 1.0 Ohms, V=41.23 -- 2.0 Ohms, V=58.30 -- 4.0 Ohms, V=82.46 -- 8.0 Ohms, V=116.61
1800 Watts -- 1.0 Ohms, V=42.42 -- 2.0 Ohms, V=60.0 -- 4.0 Ohms, V=84.85 -- 8.0 Ohms, V=120.0
1900 Watts -- 1.0 Ohms, V=43.58 -- 2.0 Ohms, V=61.64 -- 4.0 Ohms, V=87.17 -- 8.0 Ohms, V=123.28
2000 Watts -- 1.0 Ohms, V=44.72 -- 2.0 Ohms, V=63.24 -- 4.0 Ohms, V=89.44 -- 8.0 Ohms, V=126.49
2100 Watts -- 1.0 Ohms, V=45.82 -- 2.0 Ohms, V=64.80 -- 4.0 Ohms, V=91.65 -- 8.0 Ohms, V=129.61
2200 Watts -- 1.0 Ohms, V=46.90 -- 2.0 Ohms, V=66.33 -- 4.0 Ohms, V=93.80 -- 8.0 Ohms, V=132.66
2300 Watts -- 1.0 Ohms, V=47.95 -- 2.0 Ohms, V=67.82 -- 4.0 Ohms, V=95.91 -- 8.0 Ohms, V=135.64
2400 Watts -- 1.0 Ohms, V=48.98 -- 2.0 Ohms, V=69.28 -- 4.0 Ohms, V=97.97 -- 8.0 Ohms, V=138.56
2500 Watts -- 1.0 Ohms, V=50.0 -- 2.0 Ohms, V=70.71 -- 4.0 Ohms, V=100.0 -- 8.0 Ohms, V=141.42
2600 Watts -- 1.0 Ohms, V=50.99 -- 2.0 Ohms, V=72.11 -- 4.0 Ohms, V=101.98 -- 8.0 Ohms, V=144.22
2700 Watts -- 1.0 Ohms, V=51.96 -- 2.0 Ohms, V=73.48 -- 4.0 Ohms, V=103.92 -- 8.0 Ohms, V=146.96
2800 Watts -- 1.0 Ohms, V=52.91 -- 2.0 Ohms, V=74.83 -- 4.0 Ohms, V=105.83 -- 8.0 Ohms, V=149.66
2900 Watts -- 1.0 Ohms, V=53.85 -- 2.0 Ohms, V=76.15 -- 4.0 Ohms, V=107.70 -- 8.0 Ohms, V=152.31
3000 Watts -- 1.0 Ohms, V=54.77 -- 2.0 Ohms, V=77.45 -- 4.0 Ohms, V=109.54 -- 8.0 Ohms, V=154.91