surround sound

iTrader: (3)

i dont have any. trying to center the voice .

any advice is needed. peterborogh or bust

thx dave

2deep2

2 seaters really start with good fundamentals in the build of the vehicle.

Check out Gary's post: http://www.audiogroupforum.com/csforum/showthread.php?t=65674&highlight=magic+happen&page =10

08-01-2007, 11:08 PM #94
gary f biggs
Senior Member
Industry Expert


Join Date: Apr 2005
Location: tulsa oklahoma
Posts: 234

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...... Alot of people are curious about the angle or the placement of the speakers.... though it is important the actaul installation of the speakers is far more important..... 1. strongest enclosure you can build, 2. left and right side speaker enclosure exactly the same size, 3. left and right side of the car should be mirror images of one another, 4. absolutley no vibration or resonance from the dash, firewall, floorboard, doors, seats, kick panel areas, and for sure not the speaker enclosures, 5. both left and right have to have the exact freq. response as each other...... these 5 things are not rocket science at all, I didn't invent any of these concepts, I only emplemented each of them 150%... If you do these things the magic will happen on its own.....
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IASCA World Champion 1999,2001,2002,2003,2004,2005,2006
"Its Hard To Argue With Results"

Symmetry is a big part of getting the car sound symmetrical from both seats.
Many have achieved similar image from both seats without redoing the dash or removing the center console. Still the more symmetrical these items are the better.

With symmetry you can run into one other issue which requires tuning and that’s side bias. Basically it’s the tendency for the sound to load to one side or both and not dissipate with equal energy through the vehicle.

This is where you need to understand what different listener position to speaker position results in terms Stage, Image and Tonality for the particular vehicle acoustics. The issue is thought to be either standing wave or phase issues. Aiming drivers can sometimes help. I think the position of drivers gives the biggest affect in addressing the problem.

You also need make sure each symmetrical speaker is producing the same response.

I normally say start with long path lengths and small path length differences.
I have talked with a few who say symmetry is more important than path length.

I have to admit that I can move my seats forward and maintain the same center image, it only gets louder the closure you get to the speakers when the car is properly tuned.

Nevertheless….

In that I assume your car is already built and in need of tuning for next weekend

I would follow the Cmusic tuning tips: http://forum.elitecaraudio.com/showthread.php?threadid=98293

My method is a little different but pretty much the same other than I address the install and symmetry first and try to not have any large gain or cuts on the eq.

Ligeia

iTrader: (1)

The problem is that you cannot compensate for ITD and IID for both seats electronically; you must do so physically. Can you discuss more about your existing installation? What frequency range are you finding the problems most predominant?

fozzz

iTrader: (1)

Surround Sound. With installs like ours (dash mounted mids and tweets), it's extremely hard to get proper imaging from both seats if not impossible. Your path lengths arent very similar ( I would guess about 24" in difference). This alone will make the job hard. I know in my car, my center image is really bad with my two seat setting. But it's only one part of the score sheet. A good judge should be able to see past it. But if you do get your truck to image. Let me know what you did!

Dukk

Center channel.

fozzz

iTrader: (1)

I would see a center channel as a last ditch effort. But still an option.

Ligeia

iTrader: (1)

My thoughts exactly, though it's a very viable solution when all else has failed.

Dukk

IMO, if you have mids on the dash as well as tweeters and want 2 seat imaging, you're pretty much IN the last ditch