The Halo JC-1 mono amps would be perfect with your LR5's.
They are a 4 ohm speaker which are harder to drive and require amps with greater power reserve. 4 ohm speakers are
vastly more efficient than 6 0r 8 ohm designs. The LR5's
can handle amps up to 500 watts rms. The JC-1's at 400 watts rms, can handle low ohms very well. The best bang for
the buck for a great surround preamp, are the new models
from Outlaw Audio. They are factory direct only at
www.outlawaudio.com Their sound quality will knock your socks off for music and movies.
They are a 4 ohm speaker which are harder to drive and require amps with greater power reserve. 4 ohm speakers are
vastly more efficient than 6 0r 8 ohm designs. The LR5's
can handle amps up to 500 watts rms. The JC-1's at 400 watts rms, can handle low ohms very well. The best bang for
the buck for a great surround preamp, are the new models
from Outlaw Audio. They are factory direct only at
www.outlawaudio.com Their sound quality will knock your socks off for music and movies.