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This is happening in my X3M (F97/G01) that has the HK sound (688) with RAM module/booster. My X3M borne date is 2/14/2021 and the RAM module date is 4/2021 (suppose the 4th week of 2021). The model number on my RAM module is 'supposed' to be the correct, improved, working RAM module, yet I have near zero bass from under the seats.
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