Help with NAD C320BEE brightness. Break-in???

I'm the new proud owner of a NAD C 320BEE integrated amplifier. I’ve been playing it for about 2 weeks now and feel that is a tad too cool & bright sounding – bass & mids are very nice! While I’m not a person that like the lushness of certain tubs amps, I feel this amp need a touch of warmth and smoothness in the high frequency range. I’m wondering if the amp need more break in time?? Or should I run Tara Labs I.C.’s instead of the AMP/PREAMP jumpers. I was considering trying “The Missing Link” jumpers or Reference Gen 2’s ($100.00) interconnects. Thanks in advance.