Check the listing for details. (1) Hifonics Generation X Parallel Output System Card Old School Rare. Condition: Used. Listed at 19.50 USD. Your hifonics generation x amp is rendered useless without a parallel output system card seated in your amp. Now, up for grabs (sold individually) are a handful of these nearly impossible to find parallel output system cards unused. Your old school collection of amplifiers can feel a little more complete with these non oem cards. If your generation x has been missing this little piece, you need not look any farther. Message me with questions and check out my gold plated screws made for terminals such as what's found on the generation x amps. I combine shipping and refund the difference, so pay with confidence! Every amp in the generation x lineup with the exception of Son of Colossus uses these (Mars, Planet X, Thor, Boltar, Venus, Zeus, and Sampson all use one. Saturn, Goliath, and Neptune use two). Thank you for looking! Grazie!