Can someone go into detail about ohms and rms and how it relates to speakers and amps?????

2 ohms, 4ohms

175wx1
325w RMSx1 @ 2ohms (WHAT THE HEL<L DOES THIS MEAN????)

i was going to ask Bing but i think ive bugged him enough today. (thanks for all your help!!!)



PLEASE ADVISE

 

the deal with ohms:

you want the most out of your sub, so, in order to get maximum power transfer you need to match the sub to the resistance of the amp.

deleted the eqs, they dont make it easier to understand

 

An ohm is just a unit of resistance, kinda like a volt is to voltage, or an ampere is to current, or a watt is to power. I'm not into speakers so i don't know much on how it all has to be configured. An ohm is equal to 1 volt divided by 1 ampere. RMS is an acronym for "root mean square". It's been a few years since i studied those, so this is about all i know. Try searching online for these phrases.

 

as far as RMS i know it to mean root mean square= translation= constant power/watts.......

 

RMS is the equivalent DC power of an sinusoidal wave.

P=V^2/2
so at 4 ohms that amp is putting out 26 volts.

at 2 ohms the amp will still be putting out roughly 26 volts
so....
26^2/2=P
350=P at 2 ohns

 

Based on my understanding (I'm no audiophile), just an electrical technologist...

The resistance of the speaker coils will determine the power the amp can produce. For example, an amp rated at 100W RMS into 4 ohms can produce 200W at 2 ohms. Assuming that the amp's output voltage remains constant, the current output would double causing some amps to become unstable.

The basic formulae are: W = V x I and V = I x R, where
I = Current (amps)
V = Voltage (volts)
R = Resistance (ohms)
W = Power (watts)

In the post by Ahsmo above the power he calculated is 350W @ 2 ohms, but the specs you stated were 325W @ 2 ohms. I believe the amp manufacturer de-rated the output power number because the amp cannot push twice the output current and remain stable.

Have we thoroughly confused you yet ??

 

AWSEOME site that explains tons of stuff about car audio basics. The menu is on the right side of the page. Look for the topic you want and read.....

http://www.bcae1.com/

 

for electrical stuff, I always think of flowing water through a pipe...

Current (I) ~ rate of water flow
Resistance (ohms) ~ the resistance to the flow of water (the pipe surface and bends will cause a resitance to the flow of water...keeping all things constant, less resistance will allow for more flow)
Voltage (V) ~ the pressure difference from the begining to the end of the pipe (or where ever you're measureing)...it's the pressure difference that pushes/pulls the water through the pipe.

their relationship is : V=I*R

as long as you have 2 of the 3 variables, you can figure out the 3rd.

hope that helps...not exactly what you were asking, but knowing the basics behind it might help to understand it a bit more,
Peter

 

Thanks all for the info everyone!!!!!