WTK how amp shares power

[zorced]

ok tuners this is noob but i really dont know how the power from a 4 channel amp will be distributed on each channel & the help will be appreciated.

2 main questions -

my 6x9s are kinda powerful (200rms/each) and i'm worried about it robbing all the power i might want to direct on a small sub.
So does it work like that? or it doesnt matter how powerful speakers are, the power from the channel will always be the same?


the amp's power output is as follows:

4 x 60wrms @ 4ohm
4 x 120wrms @ 2 ohms
Bridged 2 x 480rms @4ohm

the two 6x9s and two 6s are 4ohm. the sub is 400rms available in d2/d4

using the best (and safest) wiring pattern how much power will be available to the 6x9s and sub if it is recommended to use this one amp for all speakers?


bless....

[3stagevtec]

it doesnt matter how powerful speakers are, the power from the channel will always be the same..

what actually determines power is the impedance (ohms) of your speakers.. at 4ohms you will get 60W per channel and at 2ohms you get 120W per channel..

get a D2 sub and run it to 2 channels on the amp..

get another pair of 6"s for your front doors and parallel them with your 6x9"s.. place those 4 speakers on the other 2 channels of your amp..

reason i recommended you get another pair of 6" speakers is that a 4ohm 6" in parallel with your 4ohm 6x9" will give 2ohms.. to get max power out of the amp..

[theblitz]

Using a 6x9" and 6" on one channel in parallel will result in the 120W@2-ohm mode.... and seeing that both speakers are of the same DC resistance they should approximately divide whatever output they get from the amp between them... 60W each if you go by amplifier ratings.

If you do that for two channels, say ch1 and ch2, you can use the other two channels for bass in bridge mode using a D2 sub with coils in series to give you 4-ohms.

The power each channel can supply will not be affected by the power ratings of speakers on other channels. That said, on a single channel, the division of the power received from the amp is dependent on the impedance of the speakers rather than power ratings of the speakers.

[3stagevtec]

^ what he said!

[theblitz]

^^ what he said also.... same ting

[Firewall]

[3stagevtec]

good point on the under powered..

a 200W speaker will be built to work with 200W of force on the suspension, meaning it would be pretty stiff..

sending only 60W to it will just barely get it going..

now if you use a 50-80W speaker, whose suspension is designed to work with ~60W, it will play much louder and be more efficient..

in an actual test i did, some 15W stock speakers actually played louder and cleaner than a pair of RF 60W coaxials on a 40W amp... it's amazing how well stock speakers can play once you use a proper crossover to drive them..

[theblitz]

Yes the full range speakers will be underpowered but I must say that I did a single amp system like this for a friend a while back and it played pretty well... apart from lacking power for the bass in his system since the sub had to be connected in 8-ohm mode.

I didn't even get to advise the guy but he had Pioneer speakers (not half-bad IMO), BOSS 4ch ( ) and a badly chosen coil config for a pioneer sub.

It'll play but just for you inside the car... don't try to clash anybody lol

Better advice yet would be to get a small mono for the sub since you don't need a very powerful amp. I say one of the D1200 directed amps for about $1100 will do just fine.

[zorced]

ok that was very helpfull

so power will be -> one 6x9 and one 6 on one channel splitting 120wrms @ 2ohm

- same on another channel

- & the sub will have 2 x 120 = 240wrms @ 4ohm power to itself

[3stagevtec]

[zorced]

lool ^ u well know how to google pics fast eh

thanks fellaz 2nr ftw!

[3stagevtec]

oh, a MUCH better idea that using 6" coaxials up front is using a pair of 6" Component Speakers..

6" component speakers - comes with a 6" midrange / midbass driver, a tweeter and a passive crossover.. they will outperform any stand alone speaker! i think Exonic on the classifieds have some on sale..

a component set will be 4ohms even with the added tweeter and crossover.. so it will wire in the same as a single 6"...

[zorced]

lol if i had room in my budget for components i would have a monoblock also on my list.. the 6s i have just there to vibrate my knee,, d 6x9s is what i countin on.. with enough power they have alot of mid range volume

[Firewall]

why not run the 6" off deck power, and the e 6x9's and sub off the amp.

IMHO will get a better all round sound. however, i don't think that a lil wonder 480.4 will give 2 x 480 @ 4ohms to properly run the sub. you could check into the Diamond audio that Exonic has (for $250, a single 10 does some damage and costs significantly less than the JBL)

[angel_player]

aye Zorced that was a big question there jed. I myself was trying to research the answer. allyuh thanks for the responses. cuz it helped me out too. yay

[zorced]

^ dun know.

Firewall, thats a good idea for the 6s.
but nah i love that jbl if i decide for lower power it might be with the titanium power. but the reason i want the jbl is because i may want to throw in a monoblock a few months in to get its full potential.
but 240 rms on it will still sound nice for now.