Need a cost effective audio upgrade. Please advise. The stock base system is terrible(doesn't come with tweeters or amp). : r/F30
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Audison Prima Level 10 Base system Audio Upgrade BMW 3 Series | eBay
One more Base Stereo Upgrade thread - BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST
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EVO PRO BMW 3 Series 320d 328i F30 F31 F34 premium in car entertainment options - In Car Entertainment and Projector Lights Pro Installer
2011 e90 335d Base Audio Upgrade that Rocks! - BMW 3-Series (E90 E92) Forum
Stage 4 - BMW Base Audio Only - Coax Speakers, Subs and DSP Amplifier – TenderSounds
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Base Stereo audio upgrade guide for BMW F10/F11 - 2010 2011 BMW 5 Series Forum F10
Base Audio sucks so I upgraded : r/BMWX3
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Sound system upgrade - BMW M3 Forum (E90 E92)
Base Stereo audio upgrade guide for BMW F10/F11 - 2010 2011 BMW 5 Series Forum F10
One more Base Stereo Upgrade thread - BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST
