I was answering based on the sticky message by JMJohn that allowed, "For those of you adding a J&M ROKKER XTP/XXRP, Performance Series or other Non-Harley brand AMPLIFIERs to your 2014-2015 Harley Infotainment radio, the proper Harley radio flash is critical to top level audio system performance, combining low distortion with a high volume level potential from whatever speaker/amplifier combination you are using ,,,"
My bad. I guess the correct answer was "it depends".
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2015 RGS - Vivid Black Stage 1 w/ SE Street Cannons : 12" Bad Seed Bars : ARC Moto 600.4 amp w/ Arc 602 & Hertz Mille Pro Speakers : All LED lighting : removable tour pak : saddle bag ghost lights