(kicad_sch
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  (generator "eeschema")
  (generator_version "8.0")
  (uuid "a1b2c3d4-e5f6-7890-abcd-ef1234567890")
  (paper "A3")
  (title_block
    (title "LM3886 Non-Inverting Class-AB Power Amplifier")
    (date "2026-08-28")
    (rev "1.0")
    (company "DIY Active Speaker Project")
    (comment 1 "Gain = 21 (26 dB), +/-25 V rails, 8 ohm midrange")
    (comment 2 "VERIFY all pins against LM3886 datasheet before PCB layout")
  )

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      )
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      )
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    (property "Value" "100k" (at 88.9 109.22 90)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" (at 88.9 104.14 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p015a"))
    (pin "2" (uuid "p015b"))
  )
  (symbol (lib_id "Device:C") (at 101.6 109.22 0) (unit 1)
    (uuid "s016")
    (property "Reference" "Cmute" (at 105.41 107.95 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "10uF" (at 105.41 110.49 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Capacitor_THT:CP_Radial_D5.0mm_P2.00mm" (at 101.6 109.22 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p016a"))
    (pin "2" (uuid "p016b"))
  )
  (symbol (lib_id "Device:C") (at 88.9 45.72 0) (unit 1)
    (uuid "s017")
    (property "Reference" "CdecP_cer" (at 93.98 44.45 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "100nF" (at 93.98 46.99 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Capacitor_SMD:C_0805_2012Metric" (at 88.9 45.72 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p017a"))
    (pin "2" (uuid "p017b"))
  )
  (symbol (lib_id "Device:C") (at 101.6 45.72 0) (unit 1)
    (uuid "s018")
    (property "Reference" "CdecP_el" (at 106.68 44.45 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "1000uF" (at 106.68 46.99 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Capacitor_THT:CP_Radial_D12.5mm_P5.00mm" (at 101.6 45.72 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p018a"))
    (pin "2" (uuid "p018b"))
  )
  (symbol (lib_id "Device:C") (at 88.9 119.38 0) (unit 1)
    (uuid "s019")
    (property "Reference" "CdecN_cer" (at 93.98 118.11 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "100nF" (at 93.98 120.65 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Capacitor_SMD:C_0805_2012Metric" (at 88.9 119.38 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p019a"))
    (pin "2" (uuid "p019b"))
  )
  (symbol (lib_id "Device:C") (at 101.6 119.38 0) (unit 1)
    (uuid "s020")
    (property "Reference" "CdecN_el" (at 106.68 118.11 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "1000uF" (at 106.68 120.65 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" "Capacitor_THT:CP_Radial_D12.5mm_P5.00mm" (at 101.6 119.38 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid "p020a"))
    (pin "2" (uuid "p020b"))
  )

  (text "WHY Cin: blocks DC from source into +IN; film for low distortion"
    (exclude_from_sim no) (at 25.4 33.02 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid "t001"))
  (text "WHY Ci: AC-grounds Ri so DC gain=1 (lowers Vos*gain offset at speaker)"
    (exclude_from_sim no) (at 25.4 35.56 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid "t002"))
  (text "WHY Zobel (Rz+Cz): presents resistive HF load when speaker Z rises"
    (exclude_from_sim no) (at 25.4 38.1 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid "t003"))
  (text "WHY Lout||RLpar: isolates capacitive cables; prevents HF oscillation"
    (exclude_from_sim no) (at 25.4 40.64 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid "t004"))
  (text "VERIFY: LM3886 pin numbers vs package (T vs TF) before PCB — datasheet Fig.1"
    (exclude_from_sim no) (at 25.4 43.18 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid "t005"))
  (sheet_instances
    (path "/" (page "1"))
  )
)