* =============================================================================
* Full 3-way LR4 crossover — all channels in one netlist for overlay plots
* Woofer LPF@300, Mid HP@300+LP@3000, Tweeter HPF@3000
* =============================================================================

.param Chp_lo=6.8n Rhp1_lo=56k Rhp2_lo=112k
.param Clp_lo1=68n Clp_lo2=136n Rlp_lo=5.6k
.param Chp_hi=6.8n Rhp1_hi=5.6k Rhp2_hi=11.2k
.param Clp_hi1=68n Clp_hi2=136n Rlp_hi=560

.subckt OPA2134X INP INM OUT VCC VEE
Gerr 0 NERR INP INM 0.01
Rp NERR 0 10Meg
Cp NERR 0 1.989e-12
Ebuf NBUF 0 NERR 0 1
Rout NBUF OUT 50
D1 OUT VCC DCLAMP
D2 VEE OUT DCLAMP
.model DCLAMP D(Is=1e-15 N=0.01)
.ends OPA2134X

Vin IN 0 DC 0 AC 1
VCC VCC 0 15
VEE VEE 0 -15

* === WOOFER LR4 LPF 300 Hz ===
R1wa IN N1wa {Rlp_lo}
R2wa N1wa N2wa {Rlp_lo}
C1wa N2wa 0 {Clp_lo1}
C2wa N1wa OUT_W1 {Clp_lo2}
Xw1 N2wa OUT_W1 OUT_W1 VCC VEE OPA2134X
R1wb OUT_W1 N1wb {Rlp_lo}
R2wb N1wb N2wb {Rlp_lo}
C1wb N2wb 0 {Clp_lo1}
C2wb N1wb WOOF_OUT {Clp_lo2}
Xw2 N2wb WOOF_OUT WOOF_OUT VCC VEE OPA2134X

* === MIDRANGE LR4 BP ===
C1ma IN N1ma {Chp_lo}
C2ma N1ma N2ma {Chp_lo}
R1ma N2ma 0 {Rhp1_lo}
R2ma N1ma OUT_M1 {Rhp2_lo}
Xm1 N2ma OUT_M1 OUT_M1 VCC VEE OPA2134X
C1mb OUT_M1 N1mb {Chp_lo}
C2mb N1mb N2mb {Chp_lo}
R1mb N2mb 0 {Rhp1_lo}
R2mb N1mb OUT_M2 {Rhp2_lo}
Xm2 N2mb OUT_M2 OUT_M2 VCC VEE OPA2134X
R1mc OUT_M2 N1mc {Rlp_hi}
R2mc N1mc N2mc {Rlp_hi}
C1mc N2mc 0 {Clp_hi1}
C2mc N1mc OUT_M3 {Clp_hi2}
Xm3 N2mc OUT_M3 OUT_M3 VCC VEE OPA2134X
R1md OUT_M3 N1md {Rlp_hi}
R2md N1md N2md {Rlp_hi}
C1md N2md 0 {Clp_hi1}
C2md N1md MID_OUT {Clp_hi2}
Xm4 N2md MID_OUT MID_OUT VCC VEE OPA2134X

* === TWEETER LR4 HPF 3000 Hz ===
C1ta IN N1ta {Chp_hi}
C2ta N1ta N2ta {Chp_hi}
R1ta N2ta 0 {Rhp1_hi}
R2ta N1ta OUT_T1 {Rhp2_hi}
Xt1 N2ta OUT_T1 OUT_T1 VCC VEE OPA2134X
C1tb OUT_T1 N1tb {Chp_hi}
C2tb N1tb N2tb {Chp_hi}
R1tb N2tb 0 {Rhp1_hi}
R2tb N1tb TWEET_OUT {Rhp2_hi}
Xt2 N2tb TWEET_OUT TWEET_OUT VCC VEE OPA2134X

.ac dec 100 10 20k
.print ac Mag(V(WOOF_OUT)) Mag(V(MID_OUT)) Mag(V(TWEET_OUT))
* Acoustic sum check (electrical proxy): LR4 HP+LP at same fc sum flat in magnitude
.end