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Old 12th November 2010, 02:11   #1
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Default About Line Drivers

Need some advice from gurus. I was finding an existing thread on Line Drivers but was not able to find one.

Following is my current setup

HU : CarPC (http://www.team-bhp.com/forum/diy-do...-carputer.html)
Front components : Rainbow SLG Titans
Rear Fill : None
Amp 1: Kenwood KAC-8401 (for components)
Amp 2 : Blaupunkt VPA1500 pro mono (for sub)
Sub : Fully loaded Fi SSD 18"
RCAs & Fuse : Scosche
Distribution Block : Connection Audison
Power cable : Finolex 0-AWG


The sound from the setup is not upto the mark even with all the gains on amps maxxed out. I did a bit of research & was suggested to add a line driver to the setup.

Hence, I need suggestions from fellow BHPians if someone has already used one or has got some more details on that.
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Old 12th November 2010, 10:33   #2
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Quote:
Originally Posted by StreetAddict View Post
The sound from the setup is not upto the mark even with all the gains on amps maxxed out. I did a bit of research & was suggested to add a line driver to the setup.
What do you not like about the sound. I suspect a line driver might not be the correct solution here. I dont know what sort of output your Car PC puts out but the rest of the components you are using are good.
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Old 12th November 2010, 10:53   #3
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You could also add a sound processor, where you get line driver as well as EQ, which could help in processing sound as per your desire.
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Old 12th November 2010, 12:07   #4
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Quote:
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The sound from the setup is not upto the mark even with all the gains on amps maxxed out.
Please dont do that. Check the entire wiring first.
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Old 12th November 2010, 12:33   #5
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Guys he is running the amp via a car pc the output of the sound card is quite less hence he need to jack them a bit. Even at full gains the output is quite less (I have heard the car).
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Old 12th November 2010, 13:56   #6
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Is it on-board sound (Realtek or similar) or is it a PCI/USB sound card?
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Old 12th November 2010, 20:09   #7
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Quote:
Originally Posted by navin View Post
I dont know what sort of output your Car PC puts out but the rest of the components you are using are good.
Quote:
Originally Posted by DerAlte View Post
Is it on-board sound (Realtek or similar) or is it a PCI/USB sound card?
I was using the onboard sound (Realtek) earlier but then switched to a Creative X-FI USB sound card. This did not increase the audio output but SQ was better as compared to the Realtek one.

Quote:
Originally Posted by Invinsible View Post
You could also add a sound processor, where you get line driver as well as EQ, which could help in processing sound as per your desire.
Never used one. Are they also known as DSPs ?

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Originally Posted by panky12345 View Post
Please dont do that. Check the entire wiring first.
Did that multiple times.

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Originally Posted by low_bass_makker View Post
Even at full gains the output is quite less (I have heard the car).
You heard it from the horses' mouth!
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Old 13th November 2010, 10:01   #8
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Quote:
Originally Posted by low_bass_makker View Post
Even at full gains the output is quite less (I have heard the car).
Finally someone who has heard the car....LBM bhai did you measure the output? How low is it? 300mv? 1V? Most amps have a sensitivity of 500mV or so.

The other problem (I have no idea of PCs or Car PCs) could be the impedance matching between the outout of the PC and the input of the car amplifier.

A cheap line driver would cost about $100 at the least and the only brand I have tried and could recomend is AudioControl. However if I were the owner I'd get the Epicenter instead as it offers a lot of subwoofer tuning options as well. The epicenter has been around for over 20 years so there should be a wealth of information on the internet. About 10 years ago Audiocontrol put out a simple line driver called Overdrive. It had a 24db gain. Nice piece it was clean and trouble free.

Now you can either spend $100-150 on the Overdrive, or spend about $200 on the Epicenter or $300-350 on an Alpine 650/RF 360.2.

Last edited by navin : 13th November 2010 at 10:02.
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Old 13th November 2010, 11:15   #9
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What are the ouputs you are using. The x-fi is a true 5.1 output card. First off are you running on stereo -> 2.1 split like a y adapter where one stereo pair goes to the kenwood and the other goes to the blau?

OR are you using the dedicated 2.1 output where front left right is only assigned to the kenwood and you are using the center/sub for the subwoofer? This is important first as using a split cable will cause issues.
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Old 13th November 2010, 11:45   #10
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Epicenter is a bass restorer. It doesn't have line output control. In this case overdrive or matrix could work the best. For little more money there is also DQX that I would suggest to it has a line driver, XO, EQ feature with 6 channel output. The other in dash option is Four.1i.
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Old 13th November 2010, 12:03   #11
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Quote:
Originally Posted by Invinsible View Post
Epicenter is a bass restorer. It doesn't have line output control.
the old version I worked with had a pass though that was full range so you had a LF singal that had a 5 channel parametic EQ and bass restoration and a fullrange output that could be fed to the fullrange amp.

Last edited by navin : 13th November 2010 at 12:04.
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Old 15th November 2010, 20:57   #12
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Quote:
Originally Posted by navin View Post
if I were the owner I'd get the Epicenter instead as it offers a lot of subwoofer tuning options as well.
Would look into it!

Quote:
Originally Posted by valhallen.282 View Post
What are the ouputs you are using. The x-fi is a true 5.1 output card. First off are you running on stereo -> 2.1 split like a y adapter where one stereo pair goes to the kenwood and the other goes to the blau?

OR are you using the dedicated 2.1 output where front left right is only assigned to the kenwood and you are using the center/sub for the subwoofer? This is important first as using a split cable will cause issues.
It's a dedicated 2.1 output.


Edit : I was also looking on this. http://www.rockfordfosgate.com/produ...3&locale=en_US. Suggestions ?

Last edited by StreetAddict : 15th November 2010 at 21:02. Reason: Addition
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Old 15th November 2010, 21:57   #13
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I would suggest the Audiocontrol products over the RF line driver. They have been choice of many pro audio builders in 90's and even today, they are flawless.
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Old 15th November 2010, 23:21   #14
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Quote:
Originally Posted by Invinsible View Post
I would suggest the Audiocontrol products over the RF line driver. They have been choice of many pro audio builders in 90's and even today, they are flawless.
Yup I have used their products in the late 80s too.
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Old 16th November 2010, 00:34   #15
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Quote:
Originally Posted by Invinsible View Post
I would suggest the Audiocontrol products over the RF line driver. They have been choice of many pro audio builders in 90's and even today, they are flawless.
Any idea if they are available in India ?
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