I have a 2016.5 model s with a base audio system. I installed the missing speakers at every factory location and even added a 10 inch subwoofer in a ported enclosure tuned to 35hz. I have a digital sound processor that can play directly from my phone by bypassing the MCU completely and the bass below 35 Hertz play fantastic on my system however playing anything on the factory MCU causes a sharp rolloff starting at 40hz and going almost completely faint at 35hz. I have read many articles and even came across one person who mentioned that had an aftermarket install by a shop mentioning that the base audio system from Tesla rolls off under 40 Hertz if not included with the UHFS package. Is there any way to replenish the sub frequencies from the Mcu? I have an equalizer on the sound processor and tried boosting the frequencies under 40hz with no luck since boosting something that isn't there is useless. I have thought of maybe asking a remote installer to toggle the Uhfs on my MCU through software but will see if any of them are willing to. Has anyone experienced the same lack of subwoofer frequencies with an aftermarket subwoofer installation with a base audio system? And has anyone installed a subwoofer with uhfs that can confirm subwoofer frequencies under 35 Hertz are still present?