A couple of things ;
(i) Your supposedly 6.5R ( ohm ) shunt resistor appears to actually be ( in your pic ) 6800 ohm ( 6.8K ) / or so the pic seems to show .
- This high value will have the effect of giving a lot less midrange attenuation ( as well as changing the load Z the crossover works into , therefore changing how the LC components react ) .
(ii) Your sweeps appear to start at 100hz ( contrary to what you state ) .
- This might be caused by a wrong setting within REW or that mic may just not have much response below 100hz ( not that unusual for a voice mic ).
(iii) ( Since you have the schematic ) I would recommend that you rebuild one crossover completely from scratch, to make sure it's wired correctly .
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