AATSX

Hi acurazine my dilemma is i want to understand everything that has to do with audio for cars. I want to understand everything from basics to advanced things.

Please teach me guys i really want to learn this so i can help myself and my friends.

I guess to begin i want to what it means when they say 50x4 on decks??

I believe ampliefire is needed for more power because the cd deck doesnt have enough to power teh speakers, subs...?

these are just some of the questions, but i want to start from scratch...how to measure power? what is ohms law?

i read this stuff on forums and stuff like 12volt.com but i still cannot understand maybe when we have typical conversation about it, i will understand better.

THANKS EVERYONE FOR SHARING AND TEACHING ME THIS INFORMATION

p.s. i love acurazine

blackasscls

50x4 is that max number of watts that your speakers can see from that head unit, truth is your speakers will never see that what your speakers will see is about 20-30 watts rms. Rms is continous power.

An amplifier is exactly what you said, it amplifies the signal to the speaker giving it greater power for the speaker to handle and thus making it louder without distorting it, something a small headunit cannot do.

As far as measuring power just look for where it says RMS the greater the rms power the the more you will get out of it.

And last but not least OHMS stand for resistance within the wiring the less resistance the more power your speakers see which makes it louder.

rynakus

But keep in mind, the lower your ohms, the harder your amp will run and more chance of blowin it. Some amps, like the old Orion HCCA's are stable down to .5 ohms, but most now are 4 or 2 and it all depends on how you wire your speakers.

Am I right in my understanding?

blackasscls

As long as you dont try to run a 1000w rms speaker With a 500watt rms amp at any ohms whether its 2 4 8 ohms whatever. If you hook up a speaker that handles way more power than the amp can produce then you have a problem. I've been running my alpine at 2 ohms for about a year without any sort of problem.

mattastick

the reason for not underpowering speakers is due to clipping... If you underpower a speaker, you're likely to blast the gain on the amp. doing this will greatly increase the chance that the amp can no longer send clean power to the speaker, which will cause the speaker to blow sooner. this is why it is better to overpower a speaker/sub than to underpower it. I'm currently sending my T110 ~700-800 from my Orion 1200d even though it's only rated at 600rms. It does just fine due to clean signal.

To rynakus, most amps are stable down to 2 and 4 ohms. my 1200 is rated stable to 1 ohm (where I'm currently running it). There are amps out there that are only rated down to 1-ohm, but can actually play at much lower impedances (.5 ohms, .35-ohms, etc.) and put out more power (if you have the electrical system to back them)

nayaab88

How would you wire a sub to get 2 ohm as opposed to 4 ohm? Would you wire it any different? sorry im a noob at all this.

mattastick

First off, you would need a new speaker... For example: a dual 2-ohm voice coiled sub can be wired at 1-ohm or 4-ohms.

This should help you out:
http://www.crutchfield.com/learn/lea...rs_wiring.html

nayaab88

ok 1 more quick question. i have this amp:
http://www.crutchfield.com/S-IbVT9zh...nce-1300a.html

and i'm wiring 1 sub to it so would i wire is this way:
http://akamaipix.crutchfield.com/ca/...2-ohm_mono.jpg

OR this way:
http://akamaipix.crutchfield.com/ca/..._2-ohm_2ch.jpg

blackasscls

Well does your sub have one voice coil or two voice coils? And are the voice coils one ohm or two ohm? if you tell us what sub u have it would be easier

nayaab88

This is the sub I have
http://www.crutchfield.com/S-tZOlOaI...nce-1252w.html

Thanks so much man.

mattastick

neither of those... mainly due to the fact that neither of those wiring diagrams are for your sub... the link you posted for your sub says it's a dual 4-ohm. the links you posted were for a single voice coiled sub, and a dual 2-ohm vc sub. the proper one for you to use would be this one:

http://akamaipix.crutchfield.com/ca/...4-ohm_mono.jpg

this will give you the most power from the amp, and run it at it's lowest rated impedance. this is what would work best for you...

blackasscls

He speaks the truth