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.
power cable awg ?
Started by tsstssBOOM, Apr 29 2012 16:17
9 replies to this topic
#1
Posted 29 Apr 2012 - 16:17
JBL GTO 75.4 AMP BRIDGED = 2 SUBS
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
#2
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
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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2009 Street A: 145.9
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2009 Street A: 145.9
2010 2nd in Street C: 138.1 (1 12" + 250wrms)
2011 Street C: 147.9
2011 Monster: 157.8 (12" and 9wrms)
2012 Street B: 148.1
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#3
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
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
JBL GTO 75.4 AMP BRIDGED = 2 SUBS
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
#4
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
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.
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.
JBL GTO 75.4 AMP BRIDGED = 2 SUBS
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
#6
Posted 08 May 2012 - 16:03
anyone 
JBL GTO 75.4 AMP BRIDGED = 2 SUBS
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
#7
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.
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.
Pioneer 8300SD
Focal Pro 165 comps
Forcal Pro 130
SPL ICE-1500D
Fused Dizzy - Fused Inline
And a shed load of advice from your lot.
Focal Pro 165 comps
Forcal Pro 130
SPL ICE-1500D
Fused Dizzy - Fused Inline
And a shed load of advice from your lot.
#9
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.
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.
JBL GTO 75.4 AMP BRIDGED = 2 SUBS
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
JBL GTO 4000 AMP = 2 CHANNELS ON FRONTS BRIDGED 1 SUB
3X12" JBL 1202D'S IN A 5.1 CUFT CUSTOM SLOT PORTED BOX TUNED @33HZ
OEM DOOR SPEAKERS /whatever.gif' class='bbc_emoticon' alt=':whatever:' /> PIONEER TWEETERS, COMPS SOON
#10
Posted 08 May 2012 - 19:10
Its just a safe investment for the future 
, if you decide to change amps , like anything in life do it right do it once
... well thats the idea
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 ,
.
New massive battery , system got alot louder . its better to over engineer everything
, if you decide to change amps , like anything in life do it right do it once ... well thats the idea
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 ,
.New massive battery , system got alot louder . its better to over engineer everything
