Anti-RIAA filter
Adaptor for Anti-RIAA filter

Anti-RIAA Filter

While cutting a record the frequency response is varied in a way that high frequencies are increased and low frequencies are decreased. When playinf a record the reversed process has to be done by the equalizer. While for the first records different eq curves have been used also in the same company, in our days cutting and reproducing is done only with RIAA curve, which is a standard today.

Checking an equalizer can be done by means of a test record or with a special filter (anti RIAA) and an oscillator. My offered filters may have either only the RIAA curve or additional eq's with 0µs, 25µs and 50µs as well as one or two output levels. With such a filter also the levelling of the entire audio chain can be checked.

© fabritius 2004 -13