I don't think I can hit bottom at 12ft with a 6xd. I know my rod and reel are too cheap and not set up correctly. But before upgrading which is the most important factor to achieving good depth? A good rod or a good reel? I think my line is ok?
BPS Tourney Special 5:6:1
TFO Professional 7' MH
I use either 10 or 12lb flouro seaguar red label or pline
If you look closely at reel specs, they don't have 3 numbers, it's two (5.6:1), in your case, for each full-turn crank of the handle, the spool rotates 5.6 revolutions, giving you a decent gear ratio for lures that "pull back". The lower the first number, the more leverage you have against the lure's resistance.
Your line should be OK. I think the diameter makes more difference that whether the actual material sinks or floats. As a SCUBA diver, I've seen a view of line going to a crankbait, and it's not straight to it; because of the drag of the line cutting through the water, it's actually got a curve to it as it descends from the surface to the lure. Thick line can limit how far down a lure can pull the line as it bows in resistance to the drag in the water. Smaller diameter line cuts through the water better, letting the lure dive deeper.
I think your limitation is being able to make long casts. There's a reason there are a lot of 7' 6" and up crankbait rods. They give more leverage for longer casts, and so does the slow action of the rod. A long slower-action (that "parabolic thing") rod will load up more, and give more leverage with that loading. The shortest rod I have for true deep cranking is 7' 6".