Problem I see is running the 4 ohm speaker with a bridged amp such as the Hafler. Tha amp will effectively see a 2 ohm load in this case I believe.
Although I'm no fan of Chinese products the Outlaw is a mono amp and henceforth should be able to run your 4 ohm speaker and it will probably sound better only for the reason that the Outlaw amp is desiged for this purpose.Where bridging a stereo is merely a side benefit,not it's sole purpose.
Although I'm no fan of Chinese products the Outlaw is a mono amp and henceforth should be able to run your 4 ohm speaker and it will probably sound better only for the reason that the Outlaw amp is desiged for this purpose.Where bridging a stereo is merely a side benefit,not it's sole purpose.