RBH Sound’s Unrivaled 21-SF/R is a 370+ lbs. monster that uses a 21” carbon fiber driver powered by a 4,000 watt amplifier. This bruiser is so powerful that it forced us to create a whole new category of performance for our Bassaholics room rating called Maximus. I discuss how this subwoofer has forever changed my music and home theater experience. Infrasonics are for real and if you're a bassaholic like me, you won't want to miss this video! Join this channel to get access to perks: https://bit.ly/35dZZ7a Read our Review of the RBH Sound 21-SF/R Subwoofer: https://www.audioholics.com/subwoofer-reviews/rbh-unrivaled-21-sf-r 🛒 RBH Sound 21N-SF/R: https://bit.ly/RBHSound21SFR 🛒 RBH Sound 12P-SF/R: https://bit.ly/RBH12PSFRsub 👉 Book a consultation with Gene: https://bit.ly/Gene-consultation ► Shop Dreamedia AV: https://dreamediaav.com/?ref=3 👉 Book your FREE custom home theater design service NOW: https://bit.ly/HTDesign • MadVR Envy MK2: https://bit.ly/MadVREnvyMK2 • Kaleidescape Terra Prime HDD: https://bit.ly/KscapeTerraPrimeHD • Kaleidescape Package Deals: https://bit.ly/Kscape-bundle Recommended Subwoofers: 🛒 RBH Sound 21-SF/R: https://bit.ly/RBHSound21SFR Perlisten D15s: https://bit.ly/PerlistenD15s Perlisten R212s: https://bit.ly/PerlistenR212s Perlisten R210s: https://bit.ly/PerlistenR210s Perlisten R18s: https://bit.ly/PerlistenR18s Arendal 1723 1S Sub: https://bit.ly/Arendal17231Ssub Recommended AV Separates Trinnov Altitude 32: https://bit.ly/TrinnovAltitude32 Trinnov Altitude 16: https://bit.ly/TrinnovAltitude16 Trinnov Amplitude 16: https://bit.ly/TrinnovAmplitude16 Trinnov Amplitude 8: https://bit.ly/TrinnovAmplitude8 Storm Audio ISP Elite MK3 Processor: https://bit.ly/StormISPEliteMk3 Storm Audio PA16 Amp: https://bit.ly/StormPA16mk3 Marantz AV 10: https://bit.ly/MarantzAV10pre Marantz Amp 10: https://bit.ly/MarantzAmp10amp Recommended AV Receivers: AudioControl XR8S: https://bit.ly/AudioControlXR8S Marantz Cinema 30: https://bit.ly/MarantzCinema30 Recommended Speakers: Perlisten S7t Limited Edition: https://bit.ly/PerlistenS7tLE Perlisten S7t: https://bit.ly/PerlistenS7towers Perlisten R7t: https://bit.ly/PerlistenR7t Perlisten R5t: https://bit.ly/PerlistenR5t Perlisten S3ic: https://bit.ly/PerlistenS3ic Perlisten R3ic: https://bit.ly/PerlistenR3ic RBH Sound SI-760/R: https://bit.ly/RBHSoundSI760R RBH Sound SI-815/RL: https://bit.ly/RBH815RL-ceiling 00:00 - Intro 01:10 - 21-SF/R construction 02:22 - General measurements 04:01 - How does RBH keep the cabinet stable? 04:52 - Subwoofer weight & customization 06:20 - Amplifier options 06:57 - Implementing the 21-SF/R with other subs 08:08 - Music listening results 09:09 - Movie listening results 10:58 - Why go sealed at this level? 11:19 - Entry price 12:21 - DSP functionality is amazing Disclosure: Audioholics earns commissions from qualifying purchases with the Affiliate Links used in the description of this video. We appreciate your support. Follow us on: Patreon: https://www.patreon.com/audioholics FACEBOOK https://www.facebook.com/Audioholics TWITTER https://twitter.com/AudioholicsLive #bass #hometheater #music