tardishead
Well-known member
I have some vintage HPF LPF units - RCA, Cinema, Langevin and Allison Labs. They are all awesome have a great sound but they all tend to boost the cutoff fequency. I thought this would be impossible being passive units - but I had a look on the Spectrum Analyser and sure enough there is a peak at the cut off frequency on all units. Can someone explain what is going on. I usually use them on inserts on my Neve desk. Is this environment causing a impedance issue which is contributing to this effect???
Should I terminate the inputs and outputs with 600 ohm resistors.
Should I terminate the inputs and outputs with 600 ohm resistors.