I had been using this OB 4way active with 2 of minidsp 2x4HD for each channel, but due to my stupid action updating umik-1 firmware while 2x4HD was also connecting to my pc then suddenly killed 2x4HD but lucky still have another board. too lazy to send it back to HK for repair, then i convert it into 2 way active with ribbon tweeter use simple 1 capacitor filter and only use 21" woofer which was crossed around 320Hz with harsch XO. you might recognize these woofer in SBAudience brand
21" woofer https://acrspeaker.com/product/21-pa-113212-sw-fabulous-by-acr/
12" woofer https://acrspeaker.com/product/12-pa-75124-w-n-fabulous-by-acr/
when I read Troels ATS-4 which apply overlap woofer and midbass without hpf seems interesting idea which i might use on my OB. so i just import each driver frd and zma from datasheet using FPGraphTracer and play with Xsim based on troels xo value as starting point. attached is the result
my idea is that i will use this overlap style where 12" woofer will not have hpf filter then using minidsp 2x4HD will be filtered around 320Hz and powered by aragon2004. my estimated 21" woofer LPF around 80-100Hz with impedance correction. because i'm not so good at passive xo design so i'll need anyone input for each value that i use especially for inductor because i have to order custom size.
attached in zip file with xsim frd & zma used
thanks for your valuable input
21" woofer https://acrspeaker.com/product/21-pa-113212-sw-fabulous-by-acr/
12" woofer https://acrspeaker.com/product/12-pa-75124-w-n-fabulous-by-acr/
when I read Troels ATS-4 which apply overlap woofer and midbass without hpf seems interesting idea which i might use on my OB. so i just import each driver frd and zma from datasheet using FPGraphTracer and play with Xsim based on troels xo value as starting point. attached is the result
my idea is that i will use this overlap style where 12" woofer will not have hpf filter then using minidsp 2x4HD will be filtered around 320Hz and powered by aragon2004. my estimated 21" woofer LPF around 80-100Hz with impedance correction. because i'm not so good at passive xo design so i'll need anyone input for each value that i use especially for inductor because i have to order custom size.
attached in zip file with xsim frd & zma used
thanks for your valuable input
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