I think running the PB2+ with one port plug would be close enough to stock. Think so Ed ? Seems like it would still be loud as hell with one plug always in.. and, still get some great bottom feeder action too..
Seems to me you could buy two PB2+'s for the cost of one HGS18. That's if the estimated cost of the PB2+ is around $1299.00. Onecall has the Velo HGS18 at $2799.00