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


Reply
 
Thread Tools Search this Thread
Old 23rd December 2010, 22:10   #10636
BHPian
 
Rajith's Avatar
 
Join Date: Jul 2008
Location: bangalore
Posts: 615
Thanked: 391 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Dear Sam,
I am having a Sound stream 4channel installed in swift with 2 rear channel dedicated to sub,now i am finsing that if you just twist or rotate the RC cable near the amp or tap the amp with hand , we hear a thud thud sound in the Sub.Can u please guide me to sort the same out.
Rajith
Rajith is offline   Reply With Quote
Old 23rd December 2010, 23:08   #10637
BHPian
 
Join Date: Dec 2009
Location: Faridabad
Posts: 719
Thanked: 36 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by abhipuru16 View Post
Hi
In my car, we have taken pre-outs from the mainboard of the stock headunit. The rear pre-outs are used to drive the subwoofer.
Now, today, I faded the headunit output all the way to rear. Then, while it was faded completely at rear I faded it all the way to left and then right. Whenever I faded to extreme left or extreme right the subwoofer output used to decrease and it would play at a lower volume.

IS THIS NORMAL?
Need more comments on this.
abhipuru16 is offline   Reply With Quote
Old 24th December 2010, 00:44   #10638
BHPian
 
thelord's Avatar
 
Join Date: May 2009
Location: Orange County, CA
Posts: 278
Thanked: 5 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Yes its normal.
Reason - Bridging
Quote:
Originally Posted by abhipuru16 View Post
Need more comments on this.
thelord is offline   Reply With Quote
Old 24th December 2010, 16:12   #10639
BHPian
 
Join Date: Dec 2009
Location: Faridabad
Posts: 719
Thanked: 36 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Please help me solve this peculiar problem in my newly installed ICE. The problem is that we took pre-outs from inside the stock HU. Now, the front channel gains are set at around 50% giving out 23V (sqrt (130X4)), which is good. The problem is with the rear channel where the subwoofer is connected. There is literally no output from anything below 90% gains. Right now, the gains for the subwoofer are almost set 100% at which the DMM reads 38.2V (desired 40V) at full clip of the gain pot.
The voltage decreases rapidly if I go below "almost full gain". All this at maximum Headunit Volume.
What could be the problem?
Please note that I hear no unwanted noises or whines maybe because the subwoofer gain is set so high and not the front components'. Please help.

The amplifier is rated as 4X130Watts RMS or 2X400Watts RMS.
abhipuru16 is offline   Reply With Quote
Old 25th December 2010, 14:03   #10640
BHPian
 
Join Date: Dec 2009
Location: Faridabad
Posts: 719
Thanked: 36 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by abhipuru16 View Post
Please help me solve this peculiar problem in my newly installed ICE. The problem is that we took pre-outs from inside the stock HU. Now, the front channel gains are set at around 50% giving out 23V (sqrt (130X4)), which is good. The problem is with the rear channel where the subwoofer is connected. There is literally no output from anything below 90% gains. Right now, the gains for the subwoofer are almost set 100% at which the DMM reads 38.2V (desired 40V) at full clip of the gain pot.
The voltage decreases rapidly if I go below "almost full gain". All this at maximum Headunit Volume.
What could be the problem?
Please note that I hear no unwanted noises or whines maybe because the subwoofer gain is set so high and not the front components'. Please help.

The amplifier is rated as 4X130Watts RMS or 2X400Watts RMS.
Please guys, I am losing my sleep over this.
abhipuru16 is offline   Reply With Quote
Old 25th December 2010, 14:21   #10641
Senior - BHPian
 
devarshi84's Avatar
 
Join Date: Jun 2005
Location: Ahmedabad - Tor
Posts: 3,996
Thanked: 118 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

What HU are you using? Does the HU have any Subwoofer settings? For eg Pioneer HU's have a setting that lets you opt between rear speakers and Sub.

Also how is your Sub wired if it is DVC?

Last edited by devarshi84 : 25th December 2010 at 14:23.
devarshi84 is offline   Reply With Quote
Old 25th December 2010, 15:34   #10642
BHPian
 
Join Date: Dec 2009
Location: Faridabad
Posts: 719
Thanked: 36 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Its a stock Fiesta MP3 Headunit with Preouts "taken" (read soldered) from inside.
The subwoofer is the Infinity Ref1240SE which is a SVC subwoofer.

Is there a possibility that the rear channel RCA might be damaged, say pinched somewhere?
abhipuru16 is offline   Reply With Quote
Old 25th December 2010, 16:28   #10643
Senior - BHPian
 
chevelle's Avatar
 
Join Date: Apr 2008
Location: sacto
Posts: 1,290
Thanked: 503 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

i have stock ice in i20. i am planning to install 8 inch JBL GTO804 sub woofer and paired with JBL KAC M525 amplifier. I will be using stock speaker and stock head unit.

The sub-woofer will be on the parcel shelf and amp will be either below passenger seat or at the back.

I have been quoted Rs. 7000 for GTO-804 and M525 and JBL wiring kit. Is this a good buy? Any changes i should make to this set up?

Please advice.

Thank you.
chevelle is offline   Reply With Quote
Old 25th December 2010, 19:59   #10644
Distinguished - BHPian
 
Sam Kapasi's Avatar
 
Join Date: Jul 2005
Location: Mumbai (but wat
Posts: 6,989
Thanked: 1,435 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by chevelle View Post
i have stock ice in i20. i am planning to install 8 inch JBL GTO804 sub woofer and paired with JBL KAC M525 amplifier. I will be using stock speaker and stock head unit.

The sub-woofer will be on the parcel shelf and amp will be either below passenger seat or at the back.

I have been quoted Rs. 7000 for GTO-804 and M525 and JBL wiring kit. Is this a good buy? Any changes i should make to this set up?

Please advice.

Thank you.
Hello Chevelle,

I'm suspecting a little misinformation. The KAC-M525 is not a JBL but a Kenwood Amplifier. A good one probably, Kenwood makes nice car amplifiers.

As far as JBL wiring kit is concerned, it is a fake wiring kit, (unless it is 2 year old stock). Don't go in that direction.
Sam Kapasi is offline   Reply With Quote
Old 26th December 2010, 09:57   #10645
Senior - BHPian
 
chevelle's Avatar
 
Join Date: Apr 2008
Location: sacto
Posts: 1,290
Thanked: 503 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by Sam Kapasi View Post
Hello Chevelle,

I'm suspecting a little misinformation. The KAC-M525 is not a JBL but a Kenwood Amplifier. A good one probably, Kenwood makes nice car amplifiers.

As far as JBL wiring kit is concerned, it is a fake wiring kit, (unless it is 2 year old stock). Don't go in that direction.
Hi Sam,

Yes, i did got it checked yesterday and it was kenwood. I wrote it wrong. They only have this m525 2 channel amp in stock. Can you point out some similar JBL amplifiers?

If not from JBL, which wiring kit should i go for?
chevelle is offline   Reply With Quote
Old 26th December 2010, 18:31   #10646
BHPian
 
Join Date: Dec 2009
Location: Faridabad
Posts: 719
Thanked: 36 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

I have no clue, please help!

Quote:
Originally Posted by abhipuru16 View Post
Please help me solve this peculiar problem in my newly installed ICE. The problem is that we took pre-outs from inside the stock HU. Now, the front channel gains are set at around 50% giving out 23V (sqrt (130X4)), which is good. The problem is with the rear channel where the subwoofer is connected. There is literally no output from anything below 90% gains. Right now, the gains for the subwoofer are almost set 100% at which the DMM reads 38.2V (desired 40V) at full clip of the gain pot.
The voltage decreases rapidly if I go below "almost full gain". All this at maximum Headunit Volume.
What could be the problem?
Please note that I hear no unwanted noises or whines maybe because the subwoofer gain is set so high and not the front components'. Please help.

The amplifier is rated as 4X130Watts RMS or 2X400Watts RMS.
abhipuru16 is offline   Reply With Quote
Old 26th December 2010, 19:44   #10647
BHPian
 
nvc_4125's Avatar
 
Join Date: Jun 2007
Location: Surat
Posts: 40
Thanked: Once
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

i m looking for 2 din HU for my swift and short listed JVC KW-XR816 with 3 pre output with 5 volt and b/t connectivity it is worth to install it or i should look for other brand.
my range is 13000 k.
nvc_4125 is offline   Reply With Quote
Old 28th December 2010, 11:12   #10648
Distinguished - BHPian
 
Sam Kapasi's Avatar
 
Join Date: Jul 2005
Location: Mumbai (but wat
Posts: 6,989
Thanked: 1,435 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by chevelle View Post
Hi Sam,

Yes, i did got it checked yesterday and it was kenwood. I wrote it wrong. They only have this m525 2 channel amp in stock. Can you point out some similar JBL amplifiers?

If not from JBL, which wiring kit should i go for?
Well, like I said, most kenwood amps are top-notch quality and I cannot see a reason to look for alternatives. If you're a brand loyalist, you would then look at the GT5-S422 amplifier from JBL, which would be sufficient to drive the GTO804 8" subwoofer..

Wiring kits are available from many brands, Kicker, Monster, Scosche etc. On a budget you could even power it using Finolex cables and MX RCA cable.
Works fine and you will probably not notice a difference with your 2 channel amplifier.
Sam Kapasi is offline   Reply With Quote
Old 3rd January 2011, 20:14   #10649
BHPian
 
donarun's Avatar
 
Join Date: Nov 2009
Location: chennai
Posts: 345
Thanked: 17 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Subwoofers sound best in which type of enclosure, wooden box or a FG enclosure assuming both are built to required volume specification ?
donarun is offline   Reply With Quote
Old 4th January 2011, 10:35   #10650
Team-BHP Support
 
navin's Avatar
 
Join Date: Mar 2004
Location: mumbai
Posts: 22,374
Thanked: 3,789 Times
Default Re: Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q

Quote:
Originally Posted by donarun View Post
Subwoofers sound best in which type of enclosure, wooden box or a FG enclosure assuming both are built to required volume specification ?
FG has it's advantages - it is stiff and it can be moulded into just about any shape but it is not as non-resonant as good quality MDF.

MDF - is cheaper and non-resonant but cannot be moulded into complex shapes.

I have been advocating a sandwich of 2 layers of 4mm MDF and 2 layers of FG (which is about 4mm). This way you get a box that has walls of about 12mm (good enough for small boxes around 1 cu. ft) that is damped and easy to shape. 4mm of MDF can be bent quite a bit. Even easier is to use 4 mm marine grade ply.
navin 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
"Cayenne" we "XC-eed" in our "Endeavour" to "Safari"? Taking powerful metal off-road SS-Traveller 4x4 Excursions 55 10th November 2016 22:56
sub enclosure advice from audio gurus clipto333 In-Car Entertainment 22 4th January 2007 11:29
Please Read This Thread *Before* Posting in the "What Car?" Section adya33 What Car? 0 12th July 2006 19:12


All times are GMT +5.5. The time now is 08:26.

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