Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Help with C5 Corvette system
Help with C5 Corvette system
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
Thread Tools Search this Thread
Old 27th July 2003, 04:52 PM   #1
eRiCdWoNg is offline eRiCdWoNg  United States
diyAudio Member
Join Date: Jul 2003
Location: maryland, USA
Send a message via AIM to eRiCdWoNg
Default Help with C5 Corvette system

I have a 15" Adire Audio Tumult I put into my C5. So far I have used a Sonotube enclosure. I find that if I put the sub directly behind the seats it sounds like poop. below is a picture of the under construction stage setup with a different woofer. There is alot of cancellation between the midbasses up front and the sub right at the X-over frequency (I run 24db/oct Linkwitz Riley alignment at about 90 Hz), the effect is most noticeable especially if the top is down. Reverseing the phase of the woofer in relation to the front speakers doesnt do a thing, so I'm thinking that the woofer is about 90 degrees out of phase. I use a real time anaylzer with pink noise to do A-B response comparisons.

If I put the woofer in the extreme rear of the car it sounds much better. However I still want to stow the top.

Is there any sort of time delay/phase shifter I can buy/make to rectify this? I might turn to a different enclosure design that I can position in the rear of the car as well.

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
  Reply With Quote
Old 28th July 2003, 04:18 AM   #2
tsmith1315 is online now tsmith1315  United States
diyAudio Member
tsmith1315's Avatar
Join Date: Jul 2003
Location: Doerun, GA
Right behind your head isn't a very good place for long sub-bass waves to originate. Unfortunately, the car dictates the location and it would be a crime to interfere with lowering the top on that car!

You could try an all-pass filter to help with phase correction. A first order allpass would delay phase slowly from 0 to -180 asymptotes with -90 at resonant frequency.

For a cheap delay look for Princeton Technology's PT2399 IC. It has ADC/DAC built in, all you need is a few external components. The only datasheet I found on the device was minimal, but did have a complete delay schematic. +5V single supply was shown which would limit the input signal. I have no idea if higher supply voltages are acceptible.

  Reply With Quote


Help with C5 Corvette systemHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help with PSU for Tri-Amp System snax Power Supplies 9 16th July 2007 09:17 PM
Dj System GOWA Multi-Way 5 6th July 2007 04:57 PM
Keep RFI out of your system? I_Forgot Everything Else 3 5th July 2007 03:34 AM
My System Anthony_casey20 Solid State 0 4th September 2004 01:12 AM
PIC Of My system in the car Dj BASS AMP Car Audio 10 10th January 2004 11:38 AM

New To Site? Need Help?

All times are GMT. The time now is 10:58 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio