Either mono-block will provide considerably more head-room due to the individual power supply in each. All depends on what you want and how much of a good thing could over-drive your SF Amati Traditions, which are rated at 500w, max. Not sure you would gain anything over the 611s with the 1.25s.
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Glenn...
Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag
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