MRD-M605 RMS rating at 4 ohm?
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=72922
Printed Date: September 07, 2025 at 9:16 AM
Topic: MRD-M605 RMS rating at 4 ohm?
Posted By: groggy23
Subject: MRD-M605 RMS rating at 4 ohm?
Date Posted: February 16, 2006 at 12:19 AM
I was looking at the specs for the following amp MRD-M605:
https://alpine-usa.com/en/products/product.php?model=MRD-M605
My final impedance load will be 4ohms so thats what I'm looking at. However I only see 250W @ 4ohms but at 12v It doesn't show anything about the 4ohm rating at 14v.. Is there a way to calculate what the RMS wattage will be at 4ohms 14v??
Replies:
Posted By: stevdart
Date Posted: February 16, 2006 at 6:47 AM
Yeah, if you want to figure this for the sake of comparisons... f\igure the watts per volt. Divide the total given watts by 12 (volt), then multiply that answer by 14.4 (or 14, whatever voltage you're trying to find the wattage for).
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: boardinbum
Date Posted: February 16, 2006 at 10:13 AM
I'm pretty sure that amp is 300x1 @ 4ohms @ 14.4 and 600x1 @ 2ohms @ 14.4.
Posted By: groggy23
Date Posted: February 16, 2006 at 10:19 AM
Ah great, thanks.
Posted By: tcss
Date Posted: February 16, 2006 at 12:18 PM
Actually its 400 watts RMS @ 4 ohms at 14.4 volts.
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There is no such thing as free installation!
Posted By: groggy23
Date Posted: February 16, 2006 at 3:04 PM
^Really? My calculations came up with 300 but I'd like to believe it tob e 400W rms even better :)
Posted By: tcss
Date Posted: February 16, 2006 at 3:42 PM
Right out of the Alpine dealer book.
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There is no such thing as free installation!
Posted By: groggy23
Date Posted: February 16, 2006 at 3:54 PM
^Sweet thanks..
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