Although your speakers have a fairly high sensitivity specification, they are a 4 ohm impedance load. Your amp does not provide a spec into a 4 ohm load. My guess is an amp is needed that likes a 4 ohm load or find a speaker with 8 ohm impedance.
Improve sound
I have a pair of martin logan 40i. Blusound node most recent version. Anthem mrx 720. I have the speakers connected with bi wire blue jeans speaker cable. The blu sound via optical cable. I have about 1000 dollars. What could I upgrade. Thought about getting an amp like the parasound 23+ or upgrading the streamer to a cambridge. Please I would love some help/suggestions.
Tim.