Matching Sources

Matching sources with the Fulcrum Acoustics products is not difficult if you only use the factory presets since they match pretty well.

However us being tech guy means we’ll mess things up every now and then. I received a bunch of questions on working with All-pass filters and some other goodies available at this time so here’s a screen capture on working with the stuff possible nowadays.

First a little explanation.

Mic positions are near field to show the respons of in this case a Fulcrum Acoustic CCX1295 and a Fulcrum Acoustic CX896 without the (terrible) acoustics in my training room getting in the way.

I changed the CX896’s x-over frequency from 70Hz to 125Hz (something you might need to do in the field for a number of reasons).

This will change the phase response and leave you with a challenge between the CCX1295 and the cx896.

After that i used 2 way’s to get them matching again:

first a 2nd order all-pass filter on the CCX1295 so more group delay/phase delay (or what ever you want to call it) in the low end.

2nd a FIR file on the CX896 and matcht it’s phase respons to the CCX1295 via FIR Designer. Little note: the Smaart V8 API implementation within FIR designer is a kinda cool tool (thanks Michael for implementing it).

So here is the screen capture (? not sure if it will work 😉 )

Enjoy and stay safe