If you read the Stereophile review of it, you will get to the point of where reviewer did notice the forward sounding treble. So, I am confident that changing the tweeter padding circuit will definitely bring the positive change, in respect to your taste. Normally one would like to have a xo board out of the enclosure to further inspect the schematic.
edit1: Now that I've spotted the 6moons photo of the board, I can't see a single resistor, probably meaning the padding was achieved by the high pass cap and a phase delay network. Still, needs to carefully draw the schematic with the original values, then simulating the circuit, and propose a mod to alter the HF response.
edit2: It is unlikely that manufacturer did not get the tweeter polarity right.
edit1: Now that I've spotted the 6moons photo of the board, I can't see a single resistor, probably meaning the padding was achieved by the high pass cap and a phase delay network. Still, needs to carefully draw the schematic with the original values, then simulating the circuit, and propose a mod to alter the HF response.
edit2: It is unlikely that manufacturer did not get the tweeter polarity right.
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They are cheap sand resistors. I have always focused on speaker placement but the last 2 years I have really studied the Sumiko and Cardas methods and the rewards I have achieved with the S25 is amazing, the speakers are now 8 ft into the room, 5ft 2 in from the nearest side wall and 8.3 ft apart. All measurements are taken from the center tweeter and with the advice from Bob Robbins from Myspeakersetup.com toed the speakers in quite dramatically along with a 4degree rake backwards.The soundstage has always been outstanding but the imaging and smoothness now is excellent. Highly recommended.
A couple of things to try...
1) Try placing the speakers lower, closer to the floor to get the tops of them away from the slanted ceiling.
2) Try moving them in so they are both in front of the short vertical wall closer to the TV set.
3) 1 and 2.
I'm not the expert on acoustics but I can't help wondering if your problems aren't more room than zoom.
I havent managed to improve the sound from the SP25. But the sound with the subwoofer on is much more relaxed, so some more boost to the bass is needed to get a more comfortable sound experience.
Should take some nearfield and far field measurements, to moore accurately get the response of the speaker.
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