Made spice model of remaining filters!!

• Low-Midrange Filter:
  • Had to change Center Frequency input from 375 to 354
• Midrange Filter:
  • Had to change Center Frequency input from 1250 to 1000
• Upper-Midrange Filter:
  • Had to change Center Frequency input from 3000 to 2830
• Presence Filter:
  • Had to change Center Frequency input from 5000 to 4900
• Brilliance Filter:
  • Had to change Center Frequency input from 13000 to 11000