Quote Originally Posted by Gregorius View Post
GM-5400T

Output Power (4 Ohm, <=1% THD) 125 Watts x 2
Output Power (4 Ohm Bridged, <=1% THD) 380 Watts x 1
Output Power (2 Ohm, <=1% THD) 190 Watts x 2

Nice lil amp, but it is NOT 2 ohm stable in bridged mode. Most Type-R subs are Dual VC, or are 2 ohm..
Are you sure the amp is getting a 4 ohm load?

The Model # of the Alpine would help too
im not sure the model number on the on the sub but its an older one.
do you know how i should wire the sub up to have it work right then?