I too have recently installed the Basslink and have been slowly tweaking my settings to my taste. I think I have the crossover set to around 50hz with the boost turned up to about half way between the center point and max.
I also had to switch the phase setting to 180 due to some serious feedback/interference with my Infinity reference 6x9'* when I closed the trunk lid. That worked out perfect since the sound coming from the sub was much better after making the change. So you may want to play around with the phase setting yourself to see if it makes a difference.
I'd also recommend using Infinity'* setup procedures out of the manual..... it gave me a good starting point, if anything. Then tweak til your ears say "HELL YEAH!!"
1997 SE/SSE - SE w/interior converted to SSE by "1993 SLE"
on 11/26/2006 @ 136,000 miles
Mods- gutted air box, tan AL7'* with matching door panels, tan dash w/HUD, CONSOLE SHIFTER CONVERSION!!
, steering wheel radio controls with Pac-Swix, Panasonic head unit, Infinity Reference front and rears, Basslink 10" sub, Python 1400XP remote start/keyless entry, chrome T-stars, Angel Eyes fogs, cleared corners.... too much to mention here!