BMW 3 Series Under Seat Mid-Bass

[ThxOne Premium Member]

Couple of questions:

1. Best mid-bass frequencies for shallow 8" speakers? Like 80hz - 180hz?
2. How directional is this frequency range?
3. Would it be beneficial to load these floor mounted speakers horn style and make the sound exit to the front of the seats into the foot wells instead of up into the underside of the seats?
4. This is for opinions - The stock speakers are 8" under front seats - 4" in doors - Tweeters in A-pillars. What is a good general range to cross each speaker... Sub - Mid-bass - Midrange - tweeter? 0/60hz - 80/180hz - 270/3Khz - 4.5K/20Khz+?

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[DFW40 10+ year member]

1. 0-200 hz not very directional would do fine under seats as they are.
2. Crossovers points...0-250 mid bass .....250-4500hz midrange.....4500-20,000 tweeter...slopes 6-12 dbs depending. These are very general.

Good passives

CDT AUDIO EX-30 3-WAY PASSIVE CAR CROSSOVERS for MIDRANGES TWEETERS NEW PAIR | eBay

The midrange is allowed to crossover to the tweeter based on its natural character. This minimalist approach will produce the best sound in most installations. Choose the mounting position and select the drivers to accommodate your vehicle and to facilitate a natural sound.

www.ebay.com

https://www.amazon.com/dp/B003R5NS9U/?tag=caraudiocom-20