They should both have a low noise floor.
Power is 150w less on XR sub channel.
If you want the best sound for your money, buy the XR for half of the JL and put that money into DSP and/or better speakers or into a better install.
Power is 150w less on XR sub channel.
If you want the best sound for your money, buy the XR for half of the JL and put that money into DSP and/or better speakers or into a better install.