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      03-01-2018, 01:43 PM   #40
Billfitz
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Drives: '15 328iX GT
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Quote:
Originally Posted by djwoodyuk View Post
Reviving an old thread here.
Thinking of upgrading my stock Harmon Kardon subs with aftermarket, but I would like to use the OEM amp.
What are my options?
It's simple enough, use WinISD or similar loudspeaker modeling software to model the results with various woofers, including the stock. Well, not so simple, since you need complete driver Theile-Small specs to do so, which you can't find for most replacement drivers nor for the originals.
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