Problem with JBL speaker system - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 2nd June 2005, 10:09 AM   #1
diyAudio Member
 
John Hope's Avatar
 
Join Date: Feb 2005
Location: nr Oxford UK
Default Problem with JBL speaker system

Hi everyone

I recently bought a Peugeot 406 Coupe which had a factory fitted sound system consisting of a Clarion CD/Tape/RDS radio and JBL speakers. It's likely the same system as fitted to the SE version of the 406 saloon.

I find this system sounds very disagreeable to me; the more so at low/medium volumes. Bass is OK, top hi's are OK, but the midrange sounds bad. It sounds 'tight' and it sounds 'hollow', like the musicians are playing in a potty. We have two of these cars in the family, and the audio systems sound exactly the same, so it's a generic issue rather than a fault.

I think it's a speaker or a crossover issue, but where and how?

The rear speakers are two JBL 9"x6" (or possibly 8"x5") fitted in the rear parcel shelf. Permanent rear headrests obstruct any sound except that reflected off the rear window. These speakers have very little air volume around them because they sit in shaped recesses pressed into the body steel, with only the magnets protruding into the boot space. I find this suspicious.
In addition there are two rear tweeters, angled forwards, mounted where the rear doors would be if there were any. I'm also concerned about difference in path length here.

The front speakers are two (probably) JBL about 8" round mounted in the lower front corners of the doors (with unknown air volume behind them, and two tweeters mounted on the front dash, firing upwards. My old Opel Kavalier had a similar setup in front with about a 6-7" round and a dashboard tweeter, and this modest system sounded much better than the (supposedly) superior JBLs in the Peugeot.

When I cover the tweeter, the main speaker still sounds bad, I don't know what sort of crossovers they use in car audio nowadays, but I this could also be a problem area. Bad choice of crossover frequency, perhaps?

Has anyone had a similar experience with the sound systems fitted in these Peugeots and could recommend what action to take.


Regards

John
__________________
At Spes Infracta
__________________
  Reply With Quote
Old 2nd June 2005, 07:25 PM   #2
diyAudio Member
 
Join Date: Apr 2005
Location: Broomfield, CO
Send a message via AIM to sr20dem0n
There's a chance the speakers just...aren't any good, that's the way it is with all of the stock car systems I've ever seen, except of course for the high end ones. They're probably just $5 speakers with no real crossovers powered by a measly 7-10 rms each. I can't speak about that system in particular, but most of the ones in the US use extremely cheap generic speakers (normally not even made by the audio company that's advertised, jbl in your case). The mids have no lowpass and the tweets have a simple cap in series to keep them from being damaged, that's it. Your best bet is probably just to replace the speakers with something respectable, I haven't found a stock system I agreed with in a long time.
  Reply With Quote
Old 3rd June 2005, 02:31 PM   #3
diyAudio Member
 
John Hope's Avatar
 
Join Date: Feb 2005
Location: nr Oxford UK
Yes, you're probably right.
The Clarion itself it quite a reasonable system: I would estimate 25W-45W rms x 4 based on listening to it and observing the size of the heatsink fitted to the power amp module in the boot. It really rocks (and sounds a lot better) if you wind it up.

When I'm feeling brave and don't mind dismantling half the car I'll try taking out one of the main speakers to have a look at what it is.

John
__________________
At Spes Infracta
__________________
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
15 ton speaker system Wavebourn Multi-Way 10 18th February 2009 05:21 PM
speaker system need help space2000 Multi-Way 3 27th May 2008 04:05 AM
Problem in creative I-trigue 3400 speaker system chtan82 Multi-Way 1 15th April 2008 02:12 PM
DIY THX speaker system PWatts Multi-Way 12 19th September 2005 08:26 PM
problem with PA-system Live Multi-Way 4 13th January 2004 07:12 PM


New To Site? Need Help?

All times are GMT. The time now is 10:51 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2