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power cable awg ?


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#1 tsstssBOOM

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Posted 29 Apr 2012 - 16:17

I want to hook up 2 x jbl amps a gto 4000 and a grand touring 75.4 one bridged for 2 subs and the other one for the front comps not sure wether to run them in bridge mode or not ? Is bridge mode just for subs.

Or which amp is best for subs or comps as i think there both 600 rms anyway

I've got 8awg from batt to boot for the 75.4 im guessing I'll need to run 4awg from batt to a distro block in the boot then 8awg from that to each amp would this suffice ?

Might as well buy a 4awg amp kit as its only £5 dearer than 5mtrs of 4awg alone.

Also is it best to turn the lpf of on the sub amp and just use the lpf on the h/u

Thanking you.
Audi tt mk1
hertz dsk 16.5 components upfront
Vibe black air 6 components in rear
jbl gto amp running all 4 components

directed audio 2400d running
2 x jbl1202d slot port box work in progress.........

#2 Ryan.

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Posted 29 Apr 2012 - 16:34

bridged isnt just for subs.
use the 4000 for the comps as its older and produces less power than the 75.4

are you ever gonna upgrade? if so id get 0awg

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#3 tsstssBOOM

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Posted 29 Apr 2012 - 16:52

I was gonna use the amps that way around the 75.4 on the subs as its a newer model plus its bigger lol
would 4awg do the job tho ? Doubt I'll ever upgrade but if i did i will sort it out if i ever did but i know what ur saying.

What about the lpf on the amp for subs on or off or just use the h/u lpf, prefer adjustment up front, or spose it doesn't matter which one u use as they both do the same thing

Cheers
Audi tt mk1
hertz dsk 16.5 components upfront
Vibe black air 6 components in rear
jbl gto amp running all 4 components

directed audio 2400d running
2 x jbl1202d slot port box work in progress.........

#4 greeef

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Posted 29 Apr 2012 - 17:36

What about the lpf on the amp for subs on or off or just use the h/u lpf, prefer adjustment up front, or spose it doesn't matter which one u use as they both do the same thing

Cheers


Try em, it's easy enough. You might find that with careful adjustment, it sounds best with both on.
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#5 tsstssBOOM

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Posted 29 Apr 2012 - 19:34

It seems that with the lpf of the amp set on and adjusted to around 80hz
it sounds better with the h/u lpf set to 80 or 120hz it sounds the same, but with the h/u lpf off u seem to get a tad more power, that's why i thought maybe its best to turn the lpf on the amp off and just use the lpf on the h/u Hhmmm.
Audi tt mk1
hertz dsk 16.5 components upfront
Vibe black air 6 components in rear
jbl gto amp running all 4 components

directed audio 2400d running
2 x jbl1202d slot port box work in progress.........

#6 tsstssBOOM

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Posted 08 May 2012 - 16:03

anyone :whatever:
Audi tt mk1
hertz dsk 16.5 components upfront
Vibe black air 6 components in rear
jbl gto amp running all 4 components

directed audio 2400d running
2 x jbl1202d slot port box work in progress.........

#7 Little_Jac

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Posted 08 May 2012 - 17:11

Power cable wise mate, like Ryan said.

As my saying is, the bigger the better, saves tossing around later with a new cable when having to disconnect the battery and what not.

Settings on the amp wise, cant tell you I'm afraid as I dont know myself.
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#8 Dave1664

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Posted 08 May 2012 - 18:24

power cable wise , i used to runs of 4 AWG from the battery , one run for each amp , but the mono amp cable got warm :wow: , so went to O AWG , best move i made :raz:

#9 tsstssBOOM

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Posted 08 May 2012 - 18:43

Already run one length of 4awg power cable to the boot
into a distro block, then 2 x 6 inch lengths of 8awg into
each amp, dash dims slightly on full tilt :/

Don't think the batterys too great anyway it looks old
the old green light on the battery that's sposed to glow
is not lol

a new batt or 0awg or both is maybe needed
but 4awg should be enough for these 2 amps

0awg must be for more like a gazzillion rms.
Audi tt mk1
hertz dsk 16.5 components upfront
Vibe black air 6 components in rear
jbl gto amp running all 4 components

directed audio 2400d running
2 x jbl1202d slot port box work in progress.........

#10 Dave1664

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Posted 08 May 2012 - 19:10

Its just a safe investment for the future :cool: , if you decide to change amps , like anything in life do it right do it once
... well thats the idea :raz:
if your battery is dead , like mine was , it would hold a false charge , showing 12.6 on the volt meter but the plates inside the battery broke down , so wouldnt hold any amps , :shake: .

New massive battery , system got alot louder . its better to over engineer everything :win: