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RCA's or High Input? Ohms?

1K views 11 replies 9 participants last post by  acuradriva  
#1 ·
Which is better to use if you want to use an amp for your highs and i know this is a newbie question but how do you determine how many ohms ur system is running at?
 
#4 ·
Quote: Jason84 on May/08/04 depends on the ohms of the subs or whatever your running... full range will be 8 ohms....(which is what most components and speakers are) subs can be anywhere from 1-8 ohms...

amps can be run at anywhere from 1-8 ohms


Depends on how the whole system is setup.. I run 4 10" wired in Series/Parrall to make a 4 Ohm load on my one amp. Then run the front and rear speakers in series to make another 4 Ohm load to my other amp.

If it's wired in series, devid the number if it's in paralle multiply the number. I.E two 8 Ohm spearkers wired in series makes a 4 Ohm Load
 
#5 ·
RCAs will be a better input than high level(speaker level) inputs.

The ohm load will be determined by what ohm the speakers are and how they are hooked up to the amp. There are multiple combinations that are used but generally car audio speakers are 4 ohms. The ohm load the amp sees will change depending upon how you wire the speakers together. Here's a link to a page I found when I did a quick SEARCH on ohms that will help you understand...ohm loads and other good info Hope this helps
Image
 
#7 ·
Tom95RS on May/08/04 said:
Depends on how the whole system is setup.. I run 4 10" wired in Series/Parrall to make a 4 Ohm load on my one amp. Then run the front and rear speakers in series to make another 4 Ohm load to my other amp.

If it's wired in series, devid the number if it's in paralle multiply the number. I.E two 8 Ohm spearkers wired in series makes a 4 Ohm Load
you have it backwards. that is how capacitors wire up. when wiring 2 8 ohm resistors (i.e. speakers) in series, you get a 16 ohm load, when you run them aprallel, its 4 ohms.
Resistors
Series:
R(equivalent)=R1 + R2

Parallel:
1/R(equivalent)= 1/R1 + 1/R2
 
#8 ·
cybrsamurai on May/08/04 said:
whoa there pilgrim... Almost all car audio speakers run at 4ohm load. Almost all car audio amps are capable of running a 4 ohm load. Some "expensive" amps will run stable at 1 and 2 ohms. If you need further explanation of impedance of circuits check this out. Ohms Law

Hope this helps you out.
you dont know what your saying..... i betcha you dont even know my sub and amp are 3 ohms... not bridged or anything just hooked up normal....

they have 8 ohm subs... 4 ohm subs 3 ohm subs dual 4s all kinds of weird stuff man... and yes most full range is 8 ohms...
 
#11 ·
If you have a multimeter that can measure ohms, you can put the leads on the (+) and (-) of the speaker and it will give you the resistance in ohms. Most full range speakers in the auto world are around 4 ohms. There's only a handful of people who have 3 ohm components, and even fewer with 2-ohm.

It appears that Jason84 has a 10W7-3 and a slash series 500/1 monoblock (FS thread posted selling his vampire and dinosaur...don't make me explain the joke). It's a 3-ohm SVC sub (well, it's actually 2.75 ohms according to the TS parameters).