i like good running saws, but i dont like the sharpness. you hear in the bark box mufflers. i am pretty sensitive to excess noise. . i wear 33d.b. howard and leight bell shaped ear plugs almost all the time , when working in my shop. hammering a nail or grinding something. that tinnyness sound, kind of hurts . its like a ear ache and i just cant focus on what i am doing. its the same in a crowded room, you hear all these conversations and our just overwhelmed.
maybe part of it is my job, but you dont realize how much information you pick up by sound and timing, pulse and vibration and even back pressure. you feel something happening before it happens .
a factory epa saw , might run ok . but when you pull the arrestor it really runs good. and you can feel it. i wonder if you took a new muffler and flash rusted it a bit. how much of the tinny sound would disappear./
it may of been a tinman vid explaining how mufflers work on combustion. you need a pressure chamber for the volume of gas expansion and it helps pull the new fuel through. if it is to open , it doesnt quite work right,