change R26 & R27 to DNP because they decrease performance at low frequencies

headphone-amp-cache.lib

@@ -393,7 +393,7 @@ ENDDEF
 #
 # POT
 #
-DEF POT RV 0 40 N N 1 F N
+DEF POT RV 0 40 Y N 1 F N
 F0 "RV" -175 0 50 V V C CNN
 F1 "POT" -100 0 50 V V C CNN
 F2 "" 0 0 50 H I C CNN

headphone-amp.kicad_pcb

@@ -18,7 +18,7 @@
   (34 B.Paste user)
   (35 F.Paste user)
   (36 B.SilkS user)
-  (37 F.SilkS user hide)
+  (37 F.SilkS user)
   (38 B.Mask user)
   (39 F.Mask user)
   (40 Dwgs.User user)
@@ -29,7 +29,7 @@
   (45 Margin user)
   (46 B.CrtYd user)
   (47 F.CrtYd user)
-  (48 B.Fab user hide)
+  (48 B.Fab user)
   (49 F.Fab user hide)
 )
 
@@ -52,7 +52,7 @@
   (34 B.Paste user)
   (35 F.Paste user)
   (36 B.SilkS user)
-  (37 F.SilkS user hide)
+  (37 F.SilkS user)
   (38 B.Mask user)
   (39 F.Mask user)
   (40 Dwgs.User user)
@@ -63,7 +63,7 @@
   (45 Margin user)
   (46 B.CrtYd user)
   (47 F.CrtYd user)
-  (48 B.Fab user hide)
+  (48 B.Fab user)
   (49 F.Fab user hide)
 )
 
@@ -4233,7 +4233,7 @@
     (fp_text reference R26 (at 0 1.45 90) (layer B.SilkS)
       (effects (font (size 1 1) (thickness 0.15)) (justify mirror))
     )
-    (fp_text value 330 (at 0 -1.55 90) (layer B.Fab)
+    (fp_text value DNP (at 0 -1.55 90) (layer B.Fab)
       (effects (font (size 1 1) (thickness 0.15)) (justify mirror))
     )
     (fp_line (start 1.95 -0.7) (end -1.96 -0.7) (layer B.CrtYd) (width 0.05))
@@ -4269,7 +4269,7 @@
     (fp_text reference R27 (at 0 -1.5 180) (layer B.SilkS)
       (effects (font (size 1 1) (thickness 0.15)) (justify mirror))
     )
-    (fp_text value 330 (at 0 -1.55 180) (layer B.Fab)
+    (fp_text value DNP (at 0 -1.55 180) (layer B.Fab)
       (effects (font (size 1 1) (thickness 0.15)) (justify mirror))
     )
     (fp_text user %R (at 0 0 180) (layer B.Fab)

headphone-amp.sch

@@ -2,12 +2,8 @@ EESchema Schematic File Version 3
 LIBS:headphone-amp-rescue
 LIBS:power
 LIBS:device
-LIBS:transistors
-LIBS:conn
 LIBS:linear
 LIBS:regul
-LIBS:74xx
-LIBS:cmos4000
 LIBS:adc-dac
 LIBS:memory
 LIBS:xilinx
@@ -22,20 +18,19 @@ LIBS:audio
 LIBS:interface
 LIBS:digital-audio
 LIBS:philips
-LIBS:display
 LIBS:cypress
 LIBS:siliconi
 LIBS:opto
 LIBS:atmel
 LIBS:contrib
-LIBS:valves
-LIBS:analog
-LIBS:regulators
-LIBS:relais
-LIBS:relays
-LIBS:ti
-LIBS:potentiometer
 LIBS:w_connectors
+LIBS:Connector
+LIBS:Relay
+LIBS:Transistor
+LIBS:shimatta_analog
+LIBS:shimatta_ti
+LIBS:shimatta_relais
+LIBS:shimatta_connectors
 LIBS:headphone-amp-cache
 EELAYER 26 0
 EELAYER END
@@ -2486,7 +2481,7 @@ L R R26
 U 1 1 59D427C6
 P 3350 5200
 F 0 "R26" V 3143 5200 50  0000 C CNN
-F 1 "330" V 3234 5200 50  0000 C CNN
+F 1 "DNP" V 3234 5200 50  0000 C CNN
 F 2 "Resistors_SMD:R_0603_HandSoldering" V 3280 5200 50  0001 C CNN
 F 3 "" H 3350 5200 50  0001 C CNN
 	1    3350 5200
@@ -2497,7 +2492,7 @@ L R R27
 U 1 1 59D4423C
 P 3350 5550
 F 0 "R27" V 3143 5550 50  0000 C CNN
-F 1 "330" V 3234 5550 50  0000 C CNN
+F 1 "DNP" V 3234 5550 50  0000 C CNN
 F 2 "Resistors_SMD:R_0603_HandSoldering" V 3280 5550 50  0001 C CNN
 F 3 "" H 3350 5550 50  0001 C CNN
 	1    3350 5550