yeah less gain on the amp is a good thing.
i used one, loved it. going from the 5v-6v clarion deck to that i noticed a difference for the better. the sub amp didnt need as much gain to reach full output. to the ear it hit slightly harder and sounded better. it was really benefitial to rock songs that sometimes lacked a strong bass signal. Keep an eye out for that clip indicator, definitly a very helpful thing when tuning a setup. I light flicker is okay but a solid lit LED on every bass note isnt.
the other thing i really like about the PLD1's are they are old school ish and were some of the last made in the USA. I've used a few line drivers and this is much better than most newer stuff made. better quality IMO than the newer PG line drivers.