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jgatie
jgatieAnswer
February 11, 2025

You don’t need the Amp to use the Sub 4.  The subwoofer out on the Amp is for 3rd party subs (and is deactivated when the Amp is used for surrounds).  Just follow the instructions to add the Sub 4 to the Arc Ultra. 

1 reply

jgatie
jgatieAnswer
February 11, 2025

You don’t need the Amp to use the Sub 4.  The subwoofer out on the Amp is for 3rd party subs (and is deactivated when the Amp is used for surrounds).  Just follow the instructions to add the Sub 4 to the Arc Ultra.