Screenshots

Import

Import data from REW. 3 bands. Impedance and SPL

You can view the data when the path to the textfiles are inserted.

Filter

Filter is split between Low , mid and high.

Low and high are up to 4th order, mid is 2 x up to 4th order. Eg. LP and HP

Filtervalues can be written. Text that is not recognised as number is disregarded.

R values can be used to model R in inductor L.

Phase shift in speaker or phase reversal can be set in "Speaker" Field. 180 is phase reversal or switch + and -

Calculate

Transfer functions, SPL, Impedance can be drawn from here. Chose 6, 2 or 0.5 db/oct for y. x is log. The right slope is then easy to verify.

Number 0 to 2 refer to Z0n to Z2n. Agg is all aggregated (or muliplied complex form)

Filtermaker

Slide Components

L is changes between Lmin to Lmax in 5+1 steps, Nl. Same With C, form Cmin to Cmax in Nc = 5+1 steps.

IZImin is lowest impedance

Different matching algorithms between active and passive filter and best Component values.

Compare

Compare an simulation With a real measurement. Impedance or SPL