Sub or Subs to mate with Sonus Faber Amati Homage

Ramses, First off thank you for really reading my post. You gave a great suggestion for a subwoofer and I will do some homework on that sub.Thank you again Rhythmace4218

The space is definitely the issue. Your room is too deep.
If you can cut short to about 13 ft then you should be fine. My friend has it with Jeff Rowlands, MLs, and Goldmunds and they all mate well with this speaker.
IMHO, this speaker doesn't sing well with sub.

Call Sumiko (REL and Sonus dealers) and ask to speak to Allan Haggar who can help you. Allan has set up Sonus Fabers all over the country with REL and knows how to integrate them very well. The Stentor III IMHO would be a great match. Just my $.02.

Tried with REL storm II. Not impressive.

Well, while they are not Levinson or Krell, I think that the Classe amp you tried, should have provided decent enough bass.

Perhaps changing cables would help.
I changed from Tara Labs Space and Time cables to a MIT 770 CVT, (bi-wired) and I noticed a dramatic increase in bass on my old Sequel IIs, and the bass on my Revels is also good. You could give those a shot.

I hate to say it, but I think it might be your room, in which case that is difficult to correct. I think Rives might be the best person to turn to to solve this problem.

BTW, something I just thought of: What source are you using? I know that some digital (CD) players and quite a few analog sources are weak in their bass response. Perhaps you could try a different source and see if that helps.

Good Luck!