Ohms wiring question

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=60395
Printed Date: May 09, 2024 at 4:46 PM

Topic: Ohms wiring question

Posted By: Tegpilot
Subject: Ohms wiring question
Date Posted: July 30, 2005 at 10:34 PM

Ok kinda a stupid question I think. I orded a pair of the new kappa 50.7cs components and they are 2 ohms and my old kappa 50.5cs are 4 ohms. Here are my amp specs. My question is I know I will get 60 watts into 2 ohms it says, but what if I want to bridge them. This says "bridged into 4 ohms" gets 120 watts. But if the speaker is 2 ohms does this matter, will it be just 120, or will it be higher, or maybe even lower???? Am I even allowed to bridge it with the speaker being 2 ohms or will it harm the amp?? And one more, does "stereo" just mean that you are pulling signal from two different channels "bridgeing" or is this wrong." I know it's newbie. Thanks for the help guys!

Replies:

Posted By: Tegpilot
Date Posted: July 30, 2005 at 10:47 PM

sorry didn't past Amp specs: Here they are

MRV-F357

Per channel into 4 ohms (CH-1 – CH-4) ..... 50W, 0.08% THD

Per channel into 2 ohms (CH-1 – CH-4) ...... 60W, 0.3% THD

Bridged into 4 ohms (CH-1 – CH-4) .......... 120W, 0.3% THD

4 ohms (CH-5) ......................................... 150W, 0.3% THD

Posted By: speedwayaudio1
Date Posted: July 30, 2005 at 10:53 PM

The only stuped question is the one you don't ask. I would not bridge that amp into 2ohms I'm sure it will not take the load. How about using the other 2 channels with 2 more kappas?

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Big Dave

Posted By: Tegpilot
Date Posted: July 30, 2005 at 11:12 PM

So if i bridge the amp to a 2 ohm speaker that means that the load at the amp is 2 ohms as well??? Well, i have a pair of kappa 6x9 on the rear deck, but I'm getting another amp to run them and the my 10" kappa DVC. I wanted to use the MRV-F357 alpine to run the two door components "bridged" in order to get the power I need from it, and use the sub channel to run A nice mid-bass 8" in a fiberglass enclosure in the middle of the floor board in the back seat. I still haven't made this said enclosure, but I plan on it in the next few days. I am not happy with the mid level inside the car. I screwed up "or didn't know any better" when I bought the first kappas 5 1/4 instead of 6 1/2's. So the new ones I just got are exhanged on warranty but they didn't have the old model anymore, but they are still 5 1/4. Speaking of which, any ideas on getting more mid range out of them. Enclosure inside the door or something???? Here are some pics of my trunk. posted_image

Posted By: haemphyst
Date Posted: July 31, 2005 at 1:37 PM

No, if you bridge into a 2 ohm load, the amp is effectively running at one ohm per channel. This will fry most amps, and I wouldn't try it...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Posted By: Tegpilot
Date Posted: July 31, 2005 at 6:04 PM

Ok i see now, thanks that makes sense. So the max power I can get to these new speakers is 60 watts rms. According to the specs right?