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      09-28-2012, 10:08 AM   #8
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Drives: '08 335i
Join Date: Jul 2008
Location: JAX

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Originally Posted by makkan00 View Post
Kaigoss, off the topic, but what is safe cross over point for Vibe slick mids.

And should they be running on Full range or high pass if there is no MS-8 in the system?
I have no experience with the Vibes but generally speaking, 4" speakers will not respond too well if you feed them frequencies below 100Hz. That is their motors cannot handle the excursion necessary to produce those notes at the required volume. Since the crossover does not totally eliminate the frequencies below the crossover point, you also need to take the crossover slope into account. I have found that 150Hz with a 24dB/oct slope, or 250Hz with a 12dB/oct slope are the "safe" settings that worked for me. That's not to say though that you cannot blow a 4" mid with those settings, so take the advice with a grain of salt!
Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15