Author Topic: Wire direct from batt to HU (Read 3665 times)

Fusion · « **on:** October 19, 2006, 11:41:03 PM »

Anyone?

If I use thicker wire (8AWG), should I connect the negative wire of HU to a new ground wire (also 8AWG)?

Also would like to here sifus opinion on the pros and cons of doing this.

Thanks.

GRexer · « **Reply #1 on:** October 20, 2006, 01:11:55 AM »

Since you'll be upgrading your HU's battery to direct from battery using 8awg, it'll be recommended to do a new 8awg grounding(i think this one, if done at reputable places, will try to find the grounding point that's the most direct to the battery without needing to pull a new long ground cable to the battery)

Pros, a more stable dedicated supply lead to the HU, thus, "theoritically" a better sounding HU, fuller vocals and the kind ;D

Cons, never thought of any, maybe in case of a power surge, it *might* fry your HU? But it'll probably fry the fuse from near the battery instead first.

A grand-sifu have mentioned before that putting a small cap(0.5F and below) and a voltage stabilizer before the power reaches the HU will have great results though, try it, you'll be amazed even though it sounded like some bull crap :D

netken · « **Reply #2 on:** October 20, 2006, 08:09:00 AM »

yeah.. put a helix cap33 and also a pivot VS there... tips from the sifu himself ...

Fusion · « **Reply #3 on:** October 20, 2006, 09:54:36 AM »

Grexer & Netken sifus, thanks

Quote from: GRexer on October 20, 2006, 01:11:55 AM

Since you'll be upgrading your HU's battery to direct from battery using 8awg, it'll be recommended to do a new 8awg grounding(i think this one, if done at reputable places, will try to find the grounding point that's the most direct to the battery without needing to pull a new long ground cable to the battery)

I'm DIYer, to certain extend, he he... what do you mean by "grounding point that's the most direct to the battery"? Usually at where?

Quote from: GRexer on October 20, 2006, 01:11:55 AM

Cons, never thought of any, maybe in case of a power surge, it *might* fry your HU? But it'll probably fry the fuse from near the battery instead first.

I have earlier bought an inline 60A fuses to be put near the battery. Do I need to install another fuse said 1-5A near the HU since HU power cable is only 18AWG? Oh ya, btw I have a TRU F1-B as well.

Quote from: netken on October 20, 2006, 08:09:00 AM

yeah.. put a helix cap33 and also a pivot VS there... tips from the sifu himself ...

Where can I get the helix cap33? Can recommend which pivot VS?

netken · « **Reply #4 on:** October 20, 2006, 10:51:43 AM »

Quote

I have earlier bought an inline 60A fuses to be put near the battery. Do I need to install another fuse said 1-5A near the HU since HU power cable is only 18AWG? Oh ya, btw I have a TRU F1-B as well.

This is most advisable to avoid direct blowing of the HU ... lol ....

That is why the helix Cap33 also acts as a buffer in the event that the fuse dun blow in time, also the Cap33 or Pivot (Blue) acts as a power conditioner for the HU ....

I think i will try and have a group buy for a Cap33 and see how the response goes...

Fusion · « **Reply #5 on:** October 20, 2006, 11:15:56 AM »

Netken, thanks

Add me in your Helix Cap33 group buy list, I'll support u

netken · « **Reply #6 on:** October 20, 2006, 11:24:11 AM »

bro u dun mind, pls confirm here ... http://www.icehifi.com/index.php/topic,124.msg1468.html#new

thanks...

mnkh27 · « **Reply #7 on:** October 20, 2006, 04:35:52 PM »

Your HU existing power cable (yellow in color) should also have a fuse, so when you tap an 8g cable to it (actually 10g is more than sufficient), you should add another small fuse at the front near the battery. A normal automotive fuse 5-10A ones is enough.

Yes, the ground needs to be upgraded as well, the same gauge as upgraded power cables.

Fusion · « **Reply #8 on:** October 20, 2006, 05:38:48 PM »

Quote from: mnkh27 on October 20, 2006, 04:35:52 PM

Your HU existing power cable (yellow in color) should also have a fuse, so when you tap an 8g cable to it (actually 10g is more than sufficient), you should add another small fuse at the front near the battery. A normal automotive fuse 5-10A ones is enough.

Yes, the ground needs to be upgraded as well, the same gauge as upgraded power cables.

Mike tailo,

I got the 8g cable for free. Hehe...

Don't think so my HU has a fuse (if you mean fuse that inline with the power cable).
The choice of fuse near battery...uhh...I thought 40A should be used to protect the short 8g cable?

Which would be the ideal way of upgrading the ground cable?
1. Pull another same gauge but long cable from negative HU to the negative terminal of battery?
2. Use a same gauge but short cable and ground it at vehicle chasis?

Zenn · « **Reply #9 on:** October 20, 2006, 05:42:18 PM »

if the 8G cable is for the HU alone u need a fuse of similar capacity to the HU, when u take out the HU u will see the fuse at the back. i prefer grounding the HU shorter route to the chassis.

GRexer · « **Reply #10 on:** October 20, 2006, 10:48:37 PM »

Quote from: Fusion on October 20, 2006, 09:54:36 AM

I'm DIYer, to certain extend, he he... what do you mean by "grounding point that's the most direct to the battery"? Usually at where?

I have earlier bought an inline 60A fuses to be put near the battery. Do I need to install another fuse said 1-5A near the HU since HU power cable is only 18AWG? Oh ya, btw I have a TRU F1-B as well.

Where can I get the helix cap33? Can recommend which pivot VS?

Usually the shortest possible grounding point near the HU's mounting ;D

As for the Pivot, i believe they are using the Pivot Blue.

Fusion · « **Reply #11 on:** October 22, 2006, 11:57:04 PM »

So I guess the wiring would be something like this?:

or this?:

Green line = Upgraded wire

GRexer · « **Reply #12 on:** October 23, 2006, 12:51:32 AM »

I would preferably choose No.1, but with both grounding points at the same location if possible.

superglwl · « **Reply #13 on:** October 23, 2006, 01:09:08 AM »

anyway how do you fit a 8g cable into the HU socket?
izznt it a bit too big for the HU?

even 10g also big rite????

Fusion · « **Reply #14 on:** October 24, 2006, 10:29:42 AM »

Quote from: superglwl on October 23, 2006, 01:09:08 AM

anyway how do you fit a 8g cable into the HU socket?
izznt it a bit too big for the HU?

even 10g also big rite????

Err..not directly into the HU socket. The 8g will connect to one end of the fuse and the other end of the fuse connect to the HU power wire that came out from the socket itself.

For clean install, a distribution block or something equivalent, maybe? DIY? Any suggestion how it is done, oh... mighty sifu?

Oh ya, in my case, where to put the baby cap?

Zenn · « **Reply #15 on:** October 26, 2006, 08:56:13 PM »

no need so big fuse (60A) or else it would be useless. it should be the total of both fuses in HU & xover (10-20A) only

Fusion · « **Reply #16 on:** October 27, 2006, 09:57:30 AM »

Quote from: Zenn on October 26, 2006, 08:56:13 PM

no need so big fuse (60A) or else it would be useless. it should be the total of both fuses in HU & xover (10-20A) only

I got the 60A AGU fuse together with the inline fuse holder I bought at car accessories shop. Meaning I should get another AGU 10-20A fuse to replace the 60A one?

netken · « **Reply #17 on:** October 27, 2006, 10:22:02 AM »

i think not the AGU type but the normal car fuse that u normally find .... similar to fuse in amps like Billet and DLS ....

nit_suj · « **Reply #18 on:** October 27, 2006, 01:41:12 PM »

sorry, i don't understand, more like not sure.
if you connect the HU directly to the battery, does that mean that the HU can be powered up without turning the switch of the car on?
if so, can that be done with the amplifier as well?

sorry if it's a stupid question/statement.
thanks

Zenn · « **Reply #19 on:** October 27, 2006, 04:20:18 PM »

your amp is also connected direct to battery, but it only switches on thru the remote wire from HU. same like HU it will be on when receive power from acc wire.

fusion fuse got several types one, AGU, ANL, etc... yours is AGU and the one u find on amps, car fuse box, behind HU are ANL, mini ANL actually, coz got big ANL osso, hehe..., even AGU also got small type...

Fusion · « **Reply #20 on:** October 27, 2006, 04:42:27 PM »

Quote from: Zenn on October 27, 2006, 04:20:18 PM

your amp is also connected direct to battery, but it only switches on thru the remote wire from HU. same like HU it will be on when receive power from acc wire.

Yup

Quote from: Zenn on October 27, 2006, 04:20:18 PM

fusion fuse got several types one, AGU, ANL, etc... yours is AGU and the one u find on amps, car fuse box, behind HU are ANL, mini ANL actually, coz got big ANL osso, hehe..., even AGU also got small type...

I bought the AGU type one coz I think it is easier to connect to the 8g wire I have. The fuse is kind a big in size. So I was wondering can get a smaller rating fuse 10-20A but with the physical size as the 60A?

GRexer · « **Reply #21 on:** October 28, 2006, 10:19:06 PM »

I think you can find those lower rating AGU fuses in Jalan Pasar, if not mistaken, 20A or 30A

netken · « **Reply #22 on:** October 29, 2006, 12:28:22 AM »

Quote from: GRexer on October 28, 2006, 10:19:06 PM

I think you can find those lower rating AGU fuses in Jalan Pasar, if not mistaken, 20A or 30A

mr. valve VTH100 owner, do make a review of the 3 units yah ... hehehehe... full thumbs up !!

superglwl · « **Reply #23 on:** October 30, 2006, 04:49:13 PM »

Quote from: Fusion on October 24, 2006, 10:29:42 AM

Err..not directly into the HU socket. The 8g will connect to one end of the fuse and the other end of the fuse connect to the HU power wire that came out from the socket itself.

For clean install, a distribution block or something equivalent, maybe? DIY? Any suggestion how it is done, oh... mighty sifu?

Oh ya, in my case, where to put the baby cap?

sorry for the slow respond.....
meaning to say there will be a bottle neck effect???
== 10awg cable
-- stock hu socket cable

BATT==FUSE=======----HU
izzit something like that?

Fusion · « **Reply #24 on:** October 31, 2006, 12:40:43 AM »

Quote from: superglwl on October 30, 2006, 04:49:13 PM

sorry for the slow respond.....
meaning to say there will be a bottle neck effect???
== 10awg cable
-- stock hu socket cable

BATT==FUSE=======----HU
izzit something like that?

As my understanding, yes. Correct me if I'm wrong (as I'm still newbie) that there will be another fuse will be used which turns out to be something like this:

BATT==FUSE=======fuse---HU

where FUSE is to protect the short cable at the Batt (==)
where fuse is used as there are 2 different sizes of cable i.e. ===== and ----

superglwl · « **Reply #25 on:** October 31, 2006, 02:47:23 PM »

anyone tried this HU cable changing thing b4 with full documentation???

GRexer · « **Reply #26 on:** October 31, 2006, 05:13:24 PM »

I've actually done the HU direct to battery power thing before, but i have no full documentation la.. that time no money buy digicam,

netken · « **Reply #27 on:** October 31, 2006, 05:23:16 PM »

Quote from: GRexer on October 31, 2006, 05:13:24 PM

I've actually done the HU direct to battery power thing before, but i have no full documentation la.. that time no money buy digicam,

off topic : dun complain .... hehehe... *coughtube*cough ...

superglwl · « **Reply #28 on:** October 31, 2006, 05:37:23 PM »

how do you connect a 10g cable to a 18g cable?

GRexer · « **Reply #29 on:** October 31, 2006, 06:34:08 PM »

Basically, for Alpine, there's a fuse before the HU? I cut off most of the thin power cable up till the "input" part of the fuse, leaving the "output" and the wire that goes back into the HU as per stock so as not to mess around.

On the input part, i'll strip the remainder of the roughly 1-2cm of the power cable, and solder on a short(roughly 1") 8ga/10ga power cable and put on the cable lug(female type), and on the other end of the power cable that comes from the battery, i'll put another cable lug, this time the male type. Voila, there you have, your newly upgrade power cable for the HU.

I did the cable lug thing instead of soldering so as to have a "quick connect" as i usually swap HUs pretty often to try things out.

ee27 · « **Reply #30 on:** November 29, 2011, 06:07:30 PM »

Quote from: Fusion on October 20, 2006, 11:15:56 AM

Netken, thanks

Add me in your Helix Cap33 group buy list, I'll support u

what mean the cap33 for audio??does it very useful for audio system??