Audio Research AC21 cross over - diyAudio
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Old 12th September 2005, 09:44 PM   #1
diyAudio Member
Join Date: Aug 2005
Default Audio Research AC21 cross over

i have a vintage A.R. AC 21 cross over. i want to change the frequencie cut for 280 Hz but i don't have the schematic. Is somebody have experience with this machine ?

thank you
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