Go Back   Team-BHP > Under the Hood > In-Car Entertainment


Reply
 
Thread Tools Search this Thread
Old 24th May 2008, 13:43   #1
BHPian
 
_abhay_'s Avatar
 
Join Date: Nov 2007
Location: mumbai
Posts: 33
Thanked: 0 Times
Default Diy Car Audio Preamplifier for Aux-in

Need a preamp to connect between the Aux port and the audio source. I usually connect my cell phone to the HeadUnit in Aux mode, i have to pump up the volume to make it audible hence the need for a preamp arises. I Also tried to change the stereo to stereo cable to a better quality thinking that was dropping the voltage but it didn't help.

I believe there is a impedance mismatch which is restricting max power o/p, hence a preamp is my requirement.

After searching the net for a while I came across a car preamp on ESP [ elliot sound products] . I am not able to understand the concept of Artificial earth and why it is required. Is getting signal earth [ ground ] so difficult in a car or its just the body ?

If any one has came across this problem and found a DIy solution please share.

HU - Pio 5950
audio source - SE W580 or MP3 player
_abhay_ is offline   Reply With Quote
Old 24th May 2008, 21:54   #2
BHPian
 
Join Date: Nov 2006
Location: Bharuch, Gujarat, India
Posts: 131
Thanked: 2 Times
Default

a 2 channel amp will do the magic. just install a 2 channel amp from a reputed brand and installer and then u wont need to PUMP UP the volume.
bmdesai1987 is offline   Reply With Quote
Old 24th May 2008, 22:24   #3
Senior - BHPian
 
greenhorn's Avatar
 
Join Date: Apr 2007
Location: TN-14
Posts: 6,837
Thanked: 1,315 Times
Default

yup, a single op amp based stage should be more than adequate, I'm not sure whether the aux input and the PSU share the same ground. I think it will be simpler to use a battery instead.

one 9V battery, One Dual channel OP amp IC ( preferably FET, since they are lower power)
and some resistors to set the gain.

PS : google for CMOY to find out more

Last edited by greenhorn : 24th May 2008 at 22:32.
greenhorn is offline   Reply With Quote
Old 25th May 2008, 01:30   #4
Senior - BHPian
 
Join Date: Mar 2006
Location: Faridabad
Posts: 6,814
Thanked: 294 Times
Default

Quote:
Originally Posted by _abhay_ View Post
HU - Pio 5950
audio source - SE W580 or MP3 player

Conneting these two sources would not be a problem. where are you connecting the hu from. And what cables are you using to connect the same.
low_bass_makker is offline   Reply With Quote
Old 25th May 2008, 10:28   #5
BHPian
 
Dhar's's Avatar
 
Join Date: Dec 2006
Location: QLN/TRV/DXB
Posts: 342
Thanked: 86 Times
Default

Increase the SLA to maximum.
Check the Aux cable for polarity.

I use my SE W810i to Pio DEH 5750MP without any issues.
Dhar's is offline   Reply With Quote
Old 25th May 2008, 14:05   #6
BHPian
 
_abhay_'s Avatar
 
Join Date: Nov 2007
Location: mumbai
Posts: 33
Thanked: 0 Times
Default

The cable I am using is a Stereo to stereo cable, one end goes into the HU and other in the handsfree connector [ I disconnect the earphones ] 5950 HU has an aux-in port on the rear panel. SLA is at max for auxin

Dhar are you getting a good bass response, as good as playing a CD ? i doubt
using the IP-bus port will be any good ?
_abhay_ is offline   Reply With Quote
Old 25th May 2008, 15:59   #7
BHPian
 
Dhar's's Avatar
 
Join Date: Dec 2006
Location: QLN/TRV/DXB
Posts: 342
Thanked: 86 Times
Default

@abhay,

I am using a IP-bus to RCA cable. I couldnt get a RB10 or RB 20. Hence it was custom made. The bass response is good. Maynot be as good as playing the same track from CD but the difference is negligible.

If interested in DIY the following link might help.

Gutterslide.com - Pioneer IP-BUS Hack
Dhar's is offline   Reply With Quote
Old 27th May 2008, 00:47   #8
BHPian
 
_abhay_'s Avatar
 
Join Date: Nov 2007
Location: mumbai
Posts: 33
Thanked: 0 Times
Default

I also have a carputer project in pipeline. Hence was looking for a preamp with channel switching. switching is not an issue , preamp is as am not well versed with analog circuits. Preamp should enhance the bass response

dhar can you post some pics of your ip-bus connector cable if you have on your pc.I had 1 failed attempt
I should soon get PCB etched for Rod Elliots car pre-amp ckt . not sure if it will work good
_abhay_ is offline   Reply With Quote
Old 1st June 2008, 12:31   #9
BHPian
 
Dhar's's Avatar
 
Join Date: Dec 2006
Location: QLN/TRV/DXB
Posts: 342
Thanked: 86 Times
Default

Sorry abhay. I dont have the picture with me.
Dhar's is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY - How to Remove stock stereo of Toyota Fortuner & Install iPod/Aux functionality dkaile In-Car Entertainment 34 7th September 2016 14:11
DIY - Fiat Linea AUX input Mr.Boss In-Car Entertainment 23 12th March 2016 15:45
Adding USB, Aux & Bluetooth to integrated in-dash audio system JLN In-Car Entertainment 6 29th September 2014 14:08
DIY blaupunkt Aux adapter greenhorn In-Car Entertainment 8 18th April 2009 22:51
Blaupunkt audio aux in problem? merve_extreme In-Car Entertainment 24 17th May 2006 23:03


All times are GMT +5.5. The time now is 20:45.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks