Audio Research SDP-1

Audio Research BL1 Vacuum tubes Audio Research EC-21 Active crossovers €834 median Audio Research EC-3 Active crossovers Audio Research EC-4 Active crossovers Audio Research EC2 Active crossovers Audio Research EC22 Active crossovers Audio Research KT-91 Vacuum tubes €3703 median Audio Research PC-3 Expansion boards Audio Research REF 2 MKII Vacuum tubes Audio Research VT200 Vacuum tubes €2198 median Audio Research 100.2 Power amplifiers €1267 median Audio Research 150.2 Power amplifiers €1158 median