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Epimetheus prototype build picture links:


P13 Frequency Response added to the Port Response (measured):
P13 Frequency Response added to the Port Response (simulated):
Optimized Phase Delays for D27 & P13

The Experimental SPL response matches the Total SPL response (500Hz - 20kHz)
A Model test with a 6.2uF cap in-line with the D27 tweeter (note the added impedance plots)
A Model test with a 16uF cap in-line with the D27 tweeter (note the added impedance plots)
P13 Motor Parameters
Impedance magnitude plot matched with the Motor Parameters shown above
Impedance magnitude plot relative error of Motor Parameters matched to measured data
Circuit file used in the Calsod simulations

! Data file for Vifa D27TG and Vifa P13WH
! This file is used for determining the time-alignment
! of the drivers, concentrated over the crossover region,
! 1kHz to 6kHz
! *** 03/25/01 ***
!
CIRCUIT
!
SPK 1 0 2 0.0000 0.0000 0.0000 0.00 POSITIVE
SPK 2 0 1 0.0000 0.0000 0.0000 0.00 POSITIVE
!
! Test cap for verifying simulation model
!
CAP 6.2E-6 1 2 FIXED
!CAP 16.0E-6 1 2 FIXED
!
DRIVER 1
D27TG
SOUND PRESSURE
FILE ASFRD LOUDTWT.FRD 0.000314 0.000314 SECONDS 0.0 DB
!
IMPEDANCE
FILE ASZMA D27_1.ZMA 0.0 0.0 SECONDS 1.0 LINEAR
!ICR 4.6
!
DRIVER 2
P13WH
SOUND PRESSURE
FILE ASFRD LOUDWFR.FRD 0.0000000 0.000000 SECONDS 0.0 DB
!
IMPEDANCE
FILE ASZMA P13_1.ZMA 0.0 0.0 SECONDS 1.0 LINEAR
!ICR 5.7
!
TARGET SPL
XYZ 0.0 0.0 0.0
SEN 90.0 DB
!
EXPERIMENTAL SPL
FILE ASFRD CAP6UF2.FRD 0.000 0.000 SECONDS 0.0 DB