You shouldn't have any brightness problems with your amp and preamp. Although I wouldn't use the Monster cables, I don't recall where anyone's complained of brightness when using them, rather the opposite: overly warm and or/closed in.
The CDP you have is not in the same league as your rest of your system but again, it's not known to be on the bright side and their line of components are midrange centric anyway (which is not to say they limit the upper and lower frequencies).
Al is usually right in his diagnosis (if he had a 1-800 number and told people their futures he'd be a wealthy man by now) :-) so try his suggestions along with experimenting with speaker placement and maybe some room treatment.
All the best,
Nonoise
The CDP you have is not in the same league as your rest of your system but again, it's not known to be on the bright side and their line of components are midrange centric anyway (which is not to say they limit the upper and lower frequencies).
Al is usually right in his diagnosis (if he had a 1-800 number and told people their futures he'd be a wealthy man by now) :-) so try his suggestions along with experimenting with speaker placement and maybe some room treatment.
All the best,
Nonoise