HD Audio Rockford Stage 2 vs Stage 3 – We Found the Real Amplifier Upgrade Your Harley Audio Needs!

Everyone wants to know – if you spend $1,200 upgrading your Harley-Davidson’s Stage 2 to the factory Stage 3 audio kit, how much louder and better does it really get? We put both systems to the test on a 2023.5 Harley with Skyline OS using: • Frequency response testing with an RTA • SPL (sound pressure level) measurements The results? Stage 3 only gave us a 0.7 dB increase over Stage 2 – hardly worth $1,200 if you’re chasing volume and clarity. But then… we swapped the factory “500-watt” amp for a Hertz SP4.900, added the SeirenHD HD-A2B8 interface, and tuned it perfectly for the Rockford Stage 3 speakers. The difference? Over 6 dB louder – and way cleaner. If you’ve already bought a Stage 2 or Stage 3 system, this is the upgrade that will finally unleash your Harley’s audio potential. 📍 Learn more & get your Harley sounding right: https://volunteeraudio.com/products/h... 👉 Whether you're upgrading your factory system or going full custom, this test gives you real data – not just opinions. We build custom amplifier & speaker upgrade packages using the best brands for your Harley-Davidson®! ✔ 100% Plug & Play – No cutting, No splicing! ✔ DIY or Professional Installation Available ✔ Step-by-Step Install Videos at VolunteerAudio.com! 💰 Need Financing? Get 0% Interest for up to 24 months through Affirm or PayPal Credit! More on Affirm here: https://www.affirm.com/how-it-works 📞 Call us today at 1-844-30AUDIO for pricing, options, and installation appointments! 👉 Hit that LIKE button, SUBSCRIBE, and drop a comment if you have questions about compatibility or install tips! #Volunteeraudio #hertzaudio #PlugAndPlay #soundtest #roadglide #streetglide #cvoroadglide #cvostreetglide