Amp and Sub 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=47088
Printed Date: May 17, 2024 at 3:13 AM
Topic: Amp and Sub question
Posted By: srusin1
Subject: Amp and Sub question
Date Posted: January 06, 2005 at 8:32 PM
when an amp says:
Key Features:
» 150 watts RMS x 1 at 4 ohms
» 300 watts RMS x 1 at 2 ohms
» 2-ohm stable
» CEA compliant
and you use two 10" subs in parallel do you get 150 to each sub for a total of 300. what would be the max wattage to a single sub?
Replies:
Posted By: spootydlux4
Date Posted: January 06, 2005 at 8:49 PM
what kind of subs do you have? DVC or SVC and what's the impedance of each coil? ------------- blah blah blah blah
Posted By: srusin1
Date Posted: January 06, 2005 at 9:18 PM
I want to buy two rockford fosgates P110S4 10" subwoofers,handle up to 150 watts RMS, SVC 4 Ohm( they are already in the box from Best Buy).How do I wire to get the most out of it with a mono amp with 300*1 at 2 ohms.What wattage does each speaker get? Is DVC better? What if I ran one sub capable of 300 watts of power, would i be able to get 300 watts from the amplifier on just 4 ohms?
Posted By: stevdart
Date Posted: January 06, 2005 at 11:26 PM
That sounds like a match-up where they are marketed to be used with each other. The subs that are already in the box should be wired together in parallel, so that the total impedance is 2 ohms. The amp outputs 300 watts into 2 ohms, so each woofer gets 150 watts. You can run one sub that will handle 300 watts, as long as it is a 2 ohm sub (or a DVC4 ohm model with coils wired in parallel). The amp outputs 300 watts into a 2 ohm load and it doesn't matter how many speakers are combined and linked together to achieve that final 2 ohm impedance. The amp just sees a load of resistance. If it sees a 4 ohm load, it will output 150 watts. And a DVC woofer is no better or worse than a SVC. The added coils allow for more wiring flexibility in general.
Posted By: srusin1
Date Posted: January 07, 2005 at 11:09 AM
For a 2 channel amp when it says 150*2 watt at 4 ohms, what is the max power delivered if you have two subs wired together? Does the 150*2 = 300 if you have a sub hooked up to the 2 diferent channels?
Posted By: stevdart
Date Posted: January 07, 2005 at 11:17 AM
Yes. 150 X 2 is just what it says. A two channel amp is actually two amps, each one outputting 150 watts. It's a design that allows for the reproduction of stereo sound. (Always talking in terms of RMS output, not Max)....the amplifier will respond to the load of impedance on each individual channel. Because we want our left/right sound to be equal, we always place the same load on the left and right channels. If left has a 4 ohm load, the amp will output 150 watts to it. Same with the right channel, for a total output of 300 watts. Remember, it's not the number of speakers that are hooked up to an amp, it's the total impedance of the combined speakers that makes the amp produce power.
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