Turn on / off pop with JBL MS8 and Sony

T

themetalmaster

New member
Quick question for Lanson or anyone else who happens to know the answer.

I've got a 2011 SHO with Sony audio and navigation and I just finished installing a JBL MS8.

It seems like it is working pretty well, I like the logic 7 processing much better than the factory surround setting, but I am getting a nasty turn on and turn off pop from the speakers.

I used the violet wire coming out of the top connector of the factory amp as my remote turn on signal, it shows voltage when accessory power is provided, so it seemed like the right thing to do. I think it is labeled remote amp turn on in the factory wiring diagram.

How can I eliminate the turn on turn off pop?
 
As far as I know. I'm using a factory ground point behind the rear passenger seat bolster on the drivers side. Is there any test I can do to make sure I've got a good ground? The sound quality is excellent, no buzzing or hissing, just the turn on/off pop.

Turning the volume down all the way on the MS8 before shutting the car off eliminates the pop.

I'm thinking the MS8 and the Sony amp are powering up in the wrong order. So I need a better ACC wire to tap so the MS8 powers up first. I'm just not sure where to look.

Later today I'll try probing the blue connector on the Sony amp with my multi-meter to see if one of those wires is switched 12v. I was under the impression that they are on all the time, but I'm not sure.
 
I'm pretty sure it has to do with the order in which the different components are powered on. The ms8 is probably being fully powered up before the head unit. No positive though.
 
I'm curious, is this your first audio-related mod to your SHO? Or have you done some other things as well?

If that's the case, does adding just the MS8 provide a significant improvement over stock?
 
glock-coma said:
Damn, should of read your second post.
Looks like your on the right track.
Click to expand...
I sure hope so. I will post an update if I figure it out. I appreciate the input.

yowen said:
I'm curious, is this your first audio-related mod to your SHO? Or have you done some other things as well?

If that's the case, does adding just the MS8 provide a significant improvement over stock?
Click to expand...
Yes indeed. The stock speakers are pretty decent. Poly cones and rubber surrounds. The factory DSP has the active crossovers set a little funny so there are holes in the audio spectrum. At least to my untrained ear that's what it sounds like. Audio quality is subjective, but the improvement to me was really impressive, even with both of the stock subs disconnected.
 
ShoBoat said:
There are stock subs? Do you mean the ones in the rear deck?


Sent from my iPhone using Tapatalk
Click to expand...

Yes. The factory service manual refers to the 6x9's in the rear deck as subwoofers. They are crossed over pretty low so I called them as such.
 
Hey there, check the MS8 for delay settings.  I think there's delay that can be added.  If nothing else, you could employ a delay relay. 

As per my PM back to you, I used that remote trigger wire (purple with red stripe if my memory serves), coming from the Sony sub amp...and it worked well. 

Stand by, I'm going to DL the MS8 service manual and see if I can find the spot where delay is spoken of.
 
OK, check it out

http://www.jbl.com/images/media/MS_8_OM_EN.pdf

Turn off delay: This setting lets you select a delay time for the MS-8 to turn
additional amplifiers off via its Remote Out terminal when the MS-8 goes into
its standby mode. The options are zero seconds (no delay), two seconds or five
seconds. The factory default is two seconds.

Try bumping this to 5 seconds, let's see what happens.
 
yowen said:
I'm curious, is this your first audio-related mod to your SHO? Or have you done some other things as well?

If that's the case, does adding just the MS8 provide a significant improvement over stock?
Click to expand...

I can't tell you what the SHO can do with the MS8 but I can tell you what the Flex can do, and other cars as well since I've used the MS8 extensively in installs with success.  That said, I would say YES the MS8 is a serious upgrade, but I would also deaden and seal up as much as you can at the same time.  The MS8 can't make the car better if parts resonate.  VERY important.
 
Does anyone know the RMS and peak power output to the 6x9 "subs" (LOL) in the rear deck of the SHO.  Also wondering about the cross frequency and low end Sony frequency produced.

I thought about looking into a couple of 10's or 12's with proper free air numbers and adding sound deadening to the trunk.  I know it's not the best... but might improve it significantly if I could
 
BiGMaC said:
Does anyone know the RMS and peak power output to the 6x9 "subs" (LOL) in the rear deck of the SHO.  Also wondering about the cross frequency and low end Sony frequency produced.

I thought about looking into a couple of 10's or 12's with proper free air numbers and adding sound deadening to the trunk.  I know it's not the best... but might improve it significantly if I could
Click to expand...

I can help with this potentially.  We could devise a simple manifold under the 6x9 openings, utilizing IB-comptable subs.  With all IB setups, cone size is critical.  A 6x9 could manifold a 10" or maybe even a 12" sub, underneath.  I need tons of pics of the target area to see what's really going on though. 

There are a few useful 10" and 12" IB subs I'm thinking of, but immediately I'm drawn to think about the SLS shallow.  It isn't cheap though. 

Another viable option could be a small box placed behind what would be a free-air sub.  There is one single 6x9 subwoofer I can think of that would play well in a small box.  That's this http://www.parts-express.com/tang-band-w69-1042j-6x9-subwoofer--264-837 .  It won't like an IB setup but a small box would go GREAT potentially. 
 
I'm bringing my PM's with Lanson online just in case someone else needs help with this same issue.

My current set up is as follows. I have a 2011 SHO with factory navigation and Sony 12 speaker sound.

With the Sony system, the front speakers are actively crossed over. Meaning separate signals are sent to the door woofers and tweeters. I am using the the front woofers and front tweeters as inputs 1-4 on the MS8. As I understand, this will provide full range signal for the MS8 to process.

I have to retrieve signal after the Sony amp to maintain head unit volume control, navigation voice, Bluetooth and SYNC.

I am using the MS8 built in amplifier for now. Outputs 1-4 are wired to front speakers. Output 5 is center channel. Outputs 6 and 7 are rear door speakers. Rear center speaker and the sub's in the rear deck are disconnected. As it is configured the MS8 is controlling all the speakers. I am using the violet wire on pin 3 of the Sony amp for accessory power on, going to the remote in on the MS8.

I'm still working on an alternate location for accessory power.
 
BiGMaC said:
Does anyone know the RMS and peak power output to the 6x9 "subs" (LOL) in the rear deck of the SHO.  Also wondering about the cross frequency and low end Sony frequency produced.

I thought about looking into a couple of 10's or 12's with proper free air numbers and adding sound deadening to the trunk.  I know it's not the best... but might improve it significantly if I could
Click to expand...

Not very much lol. With the system turned pretty much all the way up there is not much coming out of them at all. I had to put my hand on the baskets just to see if they were on when I was installing the Dynamat on the rear deck.
 
You must log in or register to reply here.

Similar threads

C
Headligh tcoming on by itself, car is off
Replies
8
Views
7K
Ta2dResqr
T
M
Random Pull/Torque Steer after new moog lower control arms.
Replies
18
Views
17K
mystery101
M
T
burnt oil smell off and on .. common leak points?
Replies
3
Views
3K
Macgyver
M
Q
Idatalink MFT-1 Radio replacement (review)
Replies
9
Views
15K
Dxlnt1
D
A
No oil pressure after new oil pump and timing set
Replies
3
Views
6K
PHRoG
P
Back
Top