* TPA3255 output LC filter — frequency response check (ideal L/C)
* L = 15 uH, C = 680 nF, Rload = 8 ohm (single-ended equivalent)
* fc_filter ≈ 1/(2*pi*sqrt(L*C)) ≈ 50 kHz — well above audio, below typical carrier
* This does NOT model the Class-D half-bridge — only the passive filter.

.param Lout=15u Cout=680n Rload=8

Vin SW 0 DC 0 AC 1
L1 SW SPK {Lout}
C1 SPK 0 {Cout}
R1 SPK 0 {Rload}

.ac dec 100 20 1Meg
.print ac Mag(V(SPK)) Phase(V(SPK))
.end