CAR Audio. No BASS?

mikeyh1015 · 07-22-2016, 01:28 PM

Hello all,

I'm hoping you can help me out with this situation I am having. I have a 2011 335IS with the 7logic HK sound system and every now and then the BASS will completely go out. In some instances it's just the passenger side sub that will go and the driver side will still be good. I fell like the amp just stops working cause of the quality in audio... but a lot of the time it will just be the passenger sub that goes out. Any thoughts? suggestions on what might be causing this issue? It's really frustrating. It is happening now more that often.

ctuna · 07-22-2016, 01:49 PM

mikeyh1015 · 07-22-2016, 05:41 PM

First thing I did but found nothing. Iono if it is a loose connection or what but I'm stumped. On top of that... the cost for the AMP is over $1K!!!!

Quote:

Originally Posted by ctuna

ctuna · 07-22-2016, 09:31 PM

You can get used L7 amps cheaper and/or get them fixed.
One guy I talked to looked up the output chips and
and replaced the two for the under
seat channels for something like 30 bucks.
You find the L7 amps for sale in the buy and sell section here and on
ebay.

http://www.e90post.com/forums/showthread.php?t=1144129

Repair
http://www.bmwradiorepair.com/?gclid...FccbQgodIEn0Cg
http://beckerautosound.com/
http://www.bmwgm5.com/Logic7_6941681.htm

http://www.e90post.com/forums/forumdisplay.php?f=27

mweisdorfer · 07-22-2016, 11:41 PM

I would check the connections at the radio and the subs. If it's the amp, you can get a Rockford Fosgate 360.3, which is a better amp than stock, and its $599.00.

it could be your subs going bad? If so, look at the ghost's at Bav Sound.

ctuna · 07-23-2016, 01:17 AM

http://www.rockfordfosgate.com/produ...tails/3sixty.3 Its a processor only.
You would still need a multi channel amp
on top of this. And a recode to Hi Fi to make it work at all
with a Logic 7 system plus a new analog harness.

Also there are no amps that interface with a logic 7 system
(idrive or pro head unit)since
it uses a fiber optic connection that is coded in a proprietary BMW
Most Code.

There are two ways to put in an aftermarket with Logic 7 amp/processor
1 recode the head unit
2 buy and expensive mobridge da2 preamp that will translate the BMW fiberoptic
signal to analog.

Better to recode and buy one of the Helix products that are
both and amp and a processor.

mikeyh1015 · 08-11-2016, 08:45 PM

So i removed my seats, checked both subs and both were good. Connections were good, no damage, just overall clean. I'm stumped... I'm thinking it is my amp. Now, the bass and quality goes out when ever I listen to a song with bass at max volume level. So I'm thinking all roads lead to my amp?

racermp · 08-12-2016, 03:15 AM

Amp

NoSlow5oh · 08-12-2016, 01:25 PM

9/10 times if the bass goes out after playing it's the amp - usually too much electricity or heat

jin · 08-12-2016, 05:18 PM

I had the same issue I fixed my L7 amp by replacing the bass ICs. Ill dig out the pictures and post a diy.

mikeyh1015 · 09-09-2016, 06:19 PM

Quote:

Originally Posted by jin

I had the same issue I fixed my L7 amp by replacing the bass ICs. Ill dig out the pictures and post a diy.

Any luck? This would save us all some $$$

Thanks in advance!

ctuna · 09-09-2016, 07:35 PM

http://www.e90post.com/forums/showthread.php?t=1144129

The guy in the above thread had success.

07-22-2016, 01:28 PM	#1
mikeyh1015 New Member 3 Rep 19 Posts Drives: 2011 BMW 335is Join Date: Dec 2014 Location: Pasadena, CA iTrader: (0)	CAR Audio. No BASS? Hello all, I'm hoping you can help me out with this situation I am having. I have a 2011 335IS with the 7logic HK sound system and every now and then the BASS will completely go out. In some instances it's just the passenger side sub that will go and the driver side will still be good. I fell like the amp just stops working cause of the quality in audio... but a lot of the time it will just be the passenger sub that goes out. Any thoughts? suggestions on what might be causing this issue? It's really frustrating. It is happening now more that often.
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07-22-2016, 01:49 PM	#2
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	There is a stereo sub forum here There is a stereo sub forum here http://www.e90post.com/forums/forumdisplay.php?f=27 Usually L7 amps go out because water gets in the trunk area. I would check that as first step. BMW stereo types http://www.e90post.com/forums/showthread.php?t=352586 http://www.e90post.com/forums/attach...2&d=1266451970 http://www.e90post.com/forums/attach...2&d=1260829447 http://www.e90post.com/forums/showthread.php?t=343673 http://www.e90post.com/forums/showthread.php?t=138949 http://www.e90post.com/forums/attach...1&d=1209780605 http://www.e90post.com/forums/attach...1&d=1209780865 http://www.e90post.com/forums/showthread.php?t=641323 http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/ http://technicpnp.com/menuDiagrams/d...e90_92_93.html http://www.musicarnw.com/page-2/ http://www.e90post.com/forums/attach...4&d=1278871872
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07-22-2016, 09:31 PM	#4
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You can get used amps cheaper and get them fixed You can get used L7 amps cheaper and/or get them fixed. One guy I talked to looked up the output chips and and replaced the two for the under seat channels for something like 30 bucks. You find the L7 amps for sale in the buy and sell section here and on ebay. http://www.e90post.com/forums/showthread.php?t=1144129 Repair http://www.bmwradiorepair.com/?gclid...FccbQgodIEn0Cg http://beckerautosound.com/ http://www.bmwgm5.com/Logic7_6941681.htm http://www.e90post.com/forums/forumdisplay.php?f=27 Last edited by ctuna; 07-23-2016 at 01:33 AM..
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07-22-2016, 11:41 PM	#5
mweisdorfer Major General 1903 Rep 6,968 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	I would check the connections at the radio and the subs. If it's the amp, you can get a Rockford Fosgate 360.3, which is a better amp than stock, and its $599.00. it could be your subs going bad? If so, look at the ghost's at Bav Sound.
	Appreciate 0 Quote

07-23-2016, 01:17 AM	#6
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	a rockford 360.3 is not even an amp. http://www.rockfordfosgate.com/produ...tails/3sixty.3 Its a processor only. You would still need a multi channel amp on top of this. And a recode to Hi Fi to make it work at all with a Logic 7 system plus a new analog harness. Also there are no amps that interface with a logic 7 system (idrive or pro head unit)since it uses a fiber optic connection that is coded in a proprietary BMW Most Code. There are two ways to put in an aftermarket with Logic 7 amp/processor 1 recode the head unit 2 buy and expensive mobridge da2 preamp that will translate the BMW fiberoptic signal to analog. Better to recode and buy one of the Helix products that are both and amp and a processor. Last edited by ctuna; 07-23-2016 at 01:30 AM..
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08-11-2016, 08:45 PM	#7
mikeyh1015 New Member 3 Rep 19 Posts Drives: 2011 BMW 335is Join Date: Dec 2014 Location: Pasadena, CA iTrader: (0)	So i removed my seats, checked both subs and both were good. Connections were good, no damage, just overall clean. I'm stumped... I'm thinking it is my amp. Now, the bass and quality goes out when ever I listen to a song with bass at max volume level. So I'm thinking all roads lead to my amp?
	Appreciate 0 Quote

08-12-2016, 03:15 AM	#8
racermp Major 190 Rep 937 Posts Drives: F30 330i Join Date: Apr 2013 Location: Houston, TX iTrader: (1)	Amp
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08-12-2016, 01:25 PM	#9
NoSlow5oh First Lieutenant 56 Rep 318 Posts Drives: 08 e90 335i Join Date: Jul 2015 Location: Madison, AL iTrader: (2)	9/10 times if the bass goes out after playing it's the amp - usually too much electricity or heat
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08-12-2016, 05:18 PM	#10
jin Second Lieutenant 74 Rep 252 Posts Drives: 2007 E90 335i Join Date: Jan 2015 Location: NZ iTrader: (2)	I had the same issue I fixed my L7 amp by replacing the bass ICs. Ill dig out the pictures and post a diy.
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09-09-2016, 07:35 PM	#12
ctuna Lieutenant General 1911 Rep 13,104 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	http://www.e90post.com/forums/showthread.php?t=1144129 The guy in the above thread had success.
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