How to make pre-outs

p64 · 1st March 2008, 19:53

This was done on an Executive. All I did was tap into internal amp's input signals. Tha amp is TDA7386, find a datasheet for detailed info.

Start by removing the headunit from the car.
To get to the pins, first you have to remove the joystick. To do that, remove the small ring from it and also the large one.

DSC04813.jpg

Both are held only by tabs, use flat tip screwdrivers and pry them of (not a pretty job). Then remove 4 screws and the connector from behind.
The next step is removing the top cover of the head unit, held by three screws. In fact I removed the headunit from fascia, but I think there is no need to do that, just remove the side metal holders to ease your access to the cover.

Find the pins and solder wires to them.

DSC04811.jpg

Pins are as follows:

11 front left
12 rear left
13 S-ground
14 front right
15 rear right

At this point, it is up to you, which wires to use. I used different wires to get out of the housing and then soldered to RCAs (I used an Y-cable, which had two male RCAs and 4 female RCAs and cut it appart).

DSC04814.jpg

Use some hot glue to keep wires from moving. Reassemble and you are ready to go.

For more pictures, take a look at: Album

The level of the signal is similar to those from the LOC, so no problem for my Blaupunkt amp. Quality seems to be better, but still lacks bass, I need a subwoofer.

Andrej

l-noel · 1st March 2008, 22:28

One word ! Whaou ! I've just look at your album !

andyp · 2nd March 2008, 08:10

there is an easier way, a speaker output to line level converter, available from maplins.
anybody trying this other than an accomplished electronics engineer is aking for trouble, solder shorts, blown audio amp, exspensive bill from honds to replace headunit, etc etc

p64 · 2nd March 2008, 12:01

You are right, except for the alternator whine introduced by LOC and 2 more stages of signal processing. Been there, done that.

Andrej

Nick7 · 2nd March 2008, 17:44

Glad you got it working ^^

However, I think you void some warranty doing this mod.
As for alternator whine, I have 0 with LOC's (I did have in start, but with some fiddling it's completely gone) - you can check in my thread about ICE install.

GhettoBlaster · 6th March 2008, 14:02

Hello, great job Andrej!!!
It's nice to know that this could be done.

gjackson · 6th March 2008, 15:37

I commend you on the size of your kahoonas!

Very tidy work.

GhettoBlaster · 20th March 2008, 15:27

Hi,

so, it looks like ground (S) is the same for all 4 RCA channels. Right?
Where do you get remote amp on / off signal? I noticed that some people use lighter contact wire. But that makes the amp turn on even if the radio is off.

Thanks!

gray52 · 20th March 2008, 20:43

where are you getting the remote +12v from for the amp to switch it on?

p64 · 20th March 2008, 21:45

All channels have common ground.

I used the accessory wire (cig lighter) for remote power. The problem is, since I have an EXE w/ bluetooth, I can't use it after turning off the ignition (all the way).

LP

Swindon Japster · 28th March 2008, 13:30

p64,
I always thought that there was a fine line betwwen genius and insanity!

Impressive stuff genius!

psykik · 21st April 2008, 12:34

p64 - are you an engineer? great work there!

p64 · 21st April 2008, 13:43

In fact I am, but a mechanical one. With no mechanical engineering work experience. Just curiosity and some friends for backup.

Andrej

1st March 2008, 19:53	#1 (permalink)
p64 Ezermester Wheelnut Join Date: 3rd July 2007 Location: MS Posts: 61 Thanks: 0 Thanked 1 Time in 1 Post	How to make pre-outs This was done on an Executive. All I did was tap into internal amp's input signals. Tha amp is TDA7386, find a datasheet for detailed info. Start by removing the headunit from the car. To get to the pins, first you have to remove the joystick. To do that, remove the small ring from it and also the large one. DSC04813.jpg Both are held only by tabs, use flat tip screwdrivers and pry them of (not a pretty job). Then remove 4 screws and the connector from behind. The next step is removing the top cover of the head unit, held by three screws. In fact I removed the headunit from fascia, but I think there is no need to do that, just remove the side metal holders to ease your access to the cover. Find the pins and solder wires to them. DSC04811.jpg Pins are as follows: 11 front left 12 rear left 13 S-ground 14 front right 15 rear right At this point, it is up to you, which wires to use. I used different wires to get out of the housing and then soldered to RCAs (I used an Y-cable, which had two male RCAs and 4 female RCAs and cut it appart). DSC04814.jpg Use some hot glue to keep wires from moving. Reassemble and you are ready to go. For more pictures, take a look at: Album The level of the signal is similar to those from the LOC, so no problem for my Blaupunkt amp. Quality seems to be better, but still lacks bass, I need a subwoofer. Andrej

6th March 2008, 14:02	#6 (permalink)
GhettoBlaster Valve Cap Join Date: 26th February 2008 Location: Ljubljana, Slovenia Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Great job!!! Hello, great job Andrej!!! It's nice to know that this could be done.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

LinkBacks (?) LinkBack to this Thread: http://www.civinfo.com/forum/how/12087-how-make-pre-outs.html
Posted By	For	Type	Date
Ecco come prendere i pre out dalla radio versione executive - Audio	This thread	Refback	30th March 2008 00:51
www.clubhondacivic.com :: Ver tema - Salidas de previo en Navegador Civic (cortesa de civinfo)	This thread	Refback	3rd March 2008 20:05

Similar Threads for: How to make pre-outs
Thread	Thread Starter	Forum	Replies	Last Post
How to make an MP3 CD	TFL	Wiki Article Discussion	9	20th July 2008 07:18
Tyre Choice Does it make the difference?	enis	Wheels, Tyres, Suspension and Brakes	4	26th February 2008 08:24
Alloys Other Wheels sometimes do make a car	Sekhmet	Wheels, Tyres, Suspension and Brakes	37	10th December 2007 13:39
Head Unit What is the make/model of the EX hu	WoolyCiv	Ipods, MP3 Players and ICE	6	6th July 2007 21:20
Head Unit Pre-outs on TypeR GT (Non SatNav)	Bazzeray	Ipods, MP3 Players and ICE	3	27th June 2007 21:12


This thread is about: How to make pre-outs, it's in How To at the Honda Civic forum Civinfo; This was done on an Executive. All I did was tap into internal amp's input signals. Tha amp is TDA7386, find a datasheet for detailed ...

1st March 2008, 22:28	#2 (permalink)
l-noel Wine and cooking ! Rocketship door handle Join Date: 5th December 2006 Location: Roanne-France Posts: 1,226 Thanks: 3 Thanked 7 Times in 3 Posts	One word ! Whaou ! I've just look at your album !

2nd March 2008, 08:10	#3 (permalink)
andyp Valve Cap Join Date: 30th August 2007 Location: Birmingham, England Posts: 42 Thanks: 0 Thanked 0 Times in 0 Posts	there is an easier way, a speaker output to line level converter, available from maplins. anybody trying this other than an accomplished electronics engineer is aking for trouble, solder shorts, blown audio amp, exspensive bill from honds to replace headunit, etc etc

2nd March 2008, 12:01	#4 (permalink)
p64 Ezermester Wheelnut Join Date: 3rd July 2007 Location: MS Posts: 61 Thanks: 0 Thanked 1 Time in 1 Post	You are right, except for the alternator whine introduced by LOC and 2 more stages of signal processing. Been there, done that. Andrej

2nd March 2008, 17:44	#5 (permalink)
Nick7 Supporter Triangular Exhaust Join Date: 10th August 2006 Location: Croatia Posts: 444 Thanks: 0 Thanked 1 Time in 1 Post	Glad you got it working ^^ However, I think you void some warranty doing this mod. As for alternator whine, I have 0 with LOC's (I did have in start, but with some fiddling it's completely gone) - you can check in my thread about ICE install.

6th March 2008, 15:37	#7 (permalink)
gjackson Locking Wheelnut Join Date: 5th February 2008 Location: West Yorks Posts: 102 Thanks: 0 Thanked 1 Time in 1 Post	I commend you on the size of your kahoonas! Very tidy work.

20th March 2008, 15:27	#8 (permalink)
GhettoBlaster Valve Cap Join Date: 26th February 2008 Location: Ljubljana, Slovenia Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Hi, so, it looks like ground (S) is the same for all 4 RCA channels. Right? Where do you get remote amp on / off signal? I noticed that some people use lighter contact wire. But that makes the amp turn on even if the radio is off. Thanks!

20th March 2008, 20:43	#9 (permalink)
gray52 Supporter Magic Rear Seat Join Date: 23rd November 2006 Location: peterborough Posts: 880 Thanks: 0 Thanked 2 Times in 2 Posts	where are you getting the remote +12v from for the amp to switch it on?

20th March 2008, 21:45	#10 (permalink)
p64 Ezermester Wheelnut Join Date: 3rd July 2007 Location: MS Posts: 61 Thanks: 0 Thanked 1 Time in 1 Post	All channels have common ground. I used the accessory wire (cig lighter) for remote power. The problem is, since I have an EXE w/ bluetooth, I can't use it after turning off the ignition (all the way). LP

28th March 2008, 13:30	#11 (permalink)
Swindon Japster Wheelnut Join Date: 29th September 2006 Posts: 87 Thanks: 0 Thanked 0 Times in 0 Posts	p64, I always thought that there was a fine line betwwen genius and insanity! Impressive stuff genius!

21st April 2008, 12:34	#12 (permalink)
psykik Supporter Triangular Exhaust Join Date: 28th April 2007 Posts: 447 Thanks: 0 Thanked 3 Times in 3 Posts	p64 - are you an engineer? great work there!

21st April 2008, 13:43	#13 (permalink)
p64 Ezermester Wheelnut Join Date: 3rd July 2007 Location: MS Posts: 61 Thanks: 0 Thanked 1 Time in 1 Post	In fact I am, but a mechanical one. With no mechanical engineering work experience. Just curiosity and some friends for backup. Andrej