Jeff Rowland Synergy 2i preamp.

I have a Krell FPB 300CX amp. I was woundering if the Synergy 2 or 2i would be a good match with the Krell.
I want a preamp to have good tight bass responce that is controled. also smooth none ear bleeding highs. Not sure if I should save up to go with the Krell kct. I am not sure on what the Highs are like.

Thanks for the help
The Rowland will be smoother than the Krell preamp. Bass response is amazingly controlled and even lower and deeper than my Placette Active which was amazing also for a single ended design.

Thank you for the information.