help installing 2nd amplifier..

[eternityz]

ive installed a
jbl gt series 600w mono amplifier GT5 - A3001 to the MTX thunder 4500 12"

now i got a
4x240watts amp audioforce pro series WSK-41204
going to hook it up with

front speakers
JBL GTO607C
2 way 70w rms, 210w peak
2ohms

Rear speakers
Sony xplod
3 way 50w rms 230w peak
4ohms

those speakers was already in the car when i brought it =\

ok, a stupid question, how do i connect the RCA cable? into the deck or into the mono amp output?
thanks

[na-118]

for the remote wire, just bridge it from the other amplifier, same goes with the battery and ground.
hook all the speakers up to the right connections.
you connect the rca from the deck to the amp, if its a 4 channel you need rca splitter, and if you have 2 amplifiers you have to get another rca and connect it

[OMG.JAI xD]

Depending on the setup you want and on how many RCA outputs on the deck you have you have the following choices.

-If your deck is equipped with a total of 6 rca outputs (FR,FL,RR,RL and 2 for subs) then connect the RCA's to the corresponding terminals on the 4 channel amp.

-If your deck is equipped with a total of 5 RCA outputs (same as above but 1 for the subs) then I recommend (but not neccesarry) an RCA splitter, which splits 1 channel into 2 or combines 2 channels into one. In this case youll need the 1 channel into 2.

-If your deck is equipped with 3 RCA outputs (front, rear and sub) then youll need 3, 1channel into 2, RCA splitters. And connect to the amplifiers accordingly.
Or, you could connect the 2 front and rear RCA's to the terminal that corresponds with + terminal for the speakers and wire the rear speakers in bridged mode in parallel and the same with the fronts.

-If your deck is equipped with 2 RCA outputs (front and rear), then you'll definately need 4 RCA, 1channel to 2, splitters.

HOWEVER.
Might I add that an RCA terminal/line has a certain voltage it produces for the amplifier.
which means the more you split it into channel the lower those input voltages will be to each amplifier. so it wont be as loud or be as clear.

solution to a deck with only 3 or 2 RCA outputs.
Buy an amp that has a high frequency input. which uses the speaker + and - as the input and amplifies the output.

Hope that helps. correct me in anything that I may have f4cked up on.

=]

[OMG.JAI xD]

for the remote wire, just bridge it from the other amplifier, same goes with the battery and ground.
hook all the speakers up to the right connections.
you connect the rca from the deck to the amp, if its a 4 channel you need rca splitter, and if you have 2 amplifiers you have to get another rca and connect it

:thumbdwn:


Remote and power can be shared. but never ground.

Each amp needs a seperate ground.
If one amp drains more power than the other then the other amp that is connected after that amp will underpower and fade the sound.
not good for the amp and speakers connected to it.

[eternityz]

thanks alot na-118 and OMG.JAI xD

[na-118]

i studied sound system installation at tafe, just going by what my tafe teacher taught us though

:thumbdwn:


Remote and power can be shared. but never ground.

Each amp needs a seperate ground.
If one amp drains more power than the other then the other amp that is connected after that amp will underpower and fade the sound.
not good for the amp and speakers connected to it.

[OMG.JAI xD]

^^^

Somethings are better learnt by experience than tafe/theory or by the words of others.

Take my word for it on this one however.
No tafe course for audio install.
You dont need qualification for audio install. its an accessory fitting trade.

If youre doing mechanics in tafe then that explains why your teacher said that.
If youre doing auto elect, you put yourself in a auto elect. position and apply rules and laws of electricity.

if a strong amp is connected in series with a weak amp. as the strong amp draws current, voltage drop occurs to the weak amp, hence allowing less amps and voltage to supply.
this happens when youre sharing power and earth.
even though they arent connected in series. there is never a component in the automotive vehicle that has ground connected in series.
they may share the same ground but never off another component. unless it is a signal or return earth to the ECU.

Should lecture your tafe teacher =D give him a beatdown.

[na-118]

LMAO oh yeah i worked for strathfirld and auto barn and mt pritchard auto if that helps
umm yes i got proof if you want send me your email and ill send you my qualification cert thingo( sound system installation, its a new course that opened beggining of this year,

[mr ©harisma]

I have ground many a dual amp set up on the same grounding point. No problem what so ever so long as they their own grounding wire to that point.....

Maybe that is what your teacher was trying to say?

[na-118]

didnt understand you, thought we would ground one amp. then bridge it with another cable across to the amp

[OMG.JAI xD]

I have ground many a dual amp set up on the same grounding point. No problem what so ever so long as they their own grounding wire to that point.....

Maybe that is what your teacher was trying to say?

Grounding more than one amp at the same point is different to grounding from one amp to another.
Thats still a parallel connection.



didnt understand you, thought we would ground one amp. then bridge it with another cable across to the amp

Which is what youre saying.
Connecting ANY electrical components in series (which means powering one component and running another component after it) wont perform as well as one that is connected in parallel.
lol I dont need "proof" of where you worked. I dont frankly care if you even worked.

Go up to an auto electrician and ask him/her this. "If you connect a electrical component in series, and the first component drains a certain amount of power, will the 2nd component next in line receive less power?"
Obviously that course you did in tafe, never even used multimeters :thumbsup::thumbsup:

Ask technicians on this forum.
and believe me non of them are running 2 amps in series.
1 grounding point for 2 amps is still a parallel connection.
Dont know what tafe you went to, but if you actually read sound system installation manuals, it clearly states that each grounding points are to be at least 3 feet apart.

Say what you want after this reply, but my point will still stand. ANY COMPONENT CONNECTED IN SERIES WILL HAVE VOLTAGE DROPS IN BETWEEN COMPONENTS.

Amps work with voltage ratings and how much current is fed to it.
Sorry I dont have as much experience as you. But out of all those places, I havent heard one that made/won a DB drag race comp, if they have, congrats.

:thumbsup::thumbsup: cheers.

[eternityz]

this is the diagram i drew, just making sure is this ok?

http://i306.photobucket.com/albums/nn254/nguyentranv/diagram.jpg

[na-118]

if you want my wiring diagram let me know ill send it via email

[eternityz]

ok if you dont mind =D

thanks

[na-118]

pm me your email