WRMS help

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=19985
Printed Date: August 26, 2025 at 9:45 AM

Topic: WRMS help

Posted By: mrdragon
Subject: WRMS help
Date Posted: October 12, 2003 at 5:23 AM

Hi guys,

I just brought a tweeter rated at 40 WRMS, and my car jvc car cd player is around 10-15 WRMS. the thing i need to ask you guys is... do i need a cross-over, i was told by one of the saleperson that it's better to have it to prevent the tweeter blow. But my car stereo is 10-15 WRMS.....would that be nessary to buy the cross-over since the tweeter is rated at 40 WRMS.

Thank-you :)

Replies:

Posted By: Velocity Motors
Date Posted: October 12, 2003 at 8:28 AM

Yes, you need a crossover for sure otherwise the speaker will be trying to place frequencies that it is not capable of playing. A tweeter does not have a rubber curround like a speaker does that allows it to play lower frequencies that is why a crossover is required so you can limit the frequencies going to it.

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: DYohn
Date Posted: October 12, 2003 at 9:05 AM

WRMS = average power rating. Power has nothing to do with the frequency the speaker is designed to play, but only with how much electrical energy if "pushing" the sound.

A tweeter is designed to reproduce high frequency sound, generally 3000 Hz and above. Playing low frequencies will burn out (blow) the tweeter. You will need a crossover to keep the low frequencies out of the tweeter.

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