Installing components w/o an amp or crossover

RonRizz

The only problem I could see with that is your stock woofer may have a low pass filter at the amp, matching the high pass at the tweeter. Not likely, but possible.
Lets say your woofer has a low pass at 1800hz, and the tweeter has a high pass at 1800hz, now you wire your aftermarkets in, so your woofer still cuts at 1800hz, but your aftermarket tweeters crossover is high pass at 3000hz. You would miss out from 1800 to 3000hz. Probably not as great issue, but if you are a discerning listener, you may pick up on it.......

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P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals