posted
Looks fun. Looks more for the people who arent as heavily into db drag or spl.I'll give it a shot when its final.
-------------------- HOLE PROBLEMS "GO LOW OR GO HOME" Team Fi/AA Team RF Bass Race Assman Industries Team Notoriously Loud Mafia Fear The Duck Posts: 7507 | From: Rising Sun Md. | Registered: Dec 2001
| IP: Logged |
posted
TBD suggestion for the install section of judging.
-Carpet, painted fiberglass, or any other equivilent clean cover of bare wood present!
I didn't understand the RTA part, is there going to be rules listed in layman's terms?
Why no engine on if it is over 30 seconds?
I like the simple only music shall be used, cause most everone has songs they want to use that aren't on a store bought cd. Looks like fun crowd involvement.
-------------------- Steven Tyler integra 2006 WF 2nd place 129.9 bassrace JVC Arsenal KD-AHD39 HD Radio/CD Receiver Alpine type-X comps Havn't picked out the amps or subs yet. All on the way soon to be installed
posted
should hopefully open some doors to the show type vehicle
-------------------- 2006 Bass Race 149.9 World Finals 2nd place H.O. Alts FI If you dont like what I have to say, just contact Boomingcreation he will erase it for you Posts: 16040 | From: tx | Registered: Dec 2003
| IP: Logged |
quote:Originally posted by LowFreq: I didn't understand the RTA part, is there going to be rules listed in layman's terms?
Contestants start out with a perfect score of 100 points.
The analyzer looks at the 1/3 octave frequency response of the system. There are 29 band-to-band transistions. The analyzer is looking for discontinuities (significant peaks or dips) at these transition points.
Ideally, the frequency response of a system will be smooth. (Not necessarily flat.) The overall shape of the frequency response curve is not important. People have different perceptions of what sounds good. The "smoothness" of the response is important. Abrupt peaks or dips in the response indicate a problem (equalization, speaker polarity, phase, crossover overlap/underlap, amp input level, etc.). The RTA scoring is to determine if these abrupt changes exsit.
First, the analyzer looks for any band-to-band transistions that exceed 9 dB. Then, it find the single biggest transition (in dB) and subtracts that number from your perfect score of 100.
Next, the analyzer looks for transistions that exceed 6 dB. (This includes transistions exceeding 9 dB but that were NOT the biggest of those transistions.) It finds the single biggest transition exceeding 6 dB and deducts that value from the RTA score.
Finally, the RTA looks for all transistions that exceed 3 dB. It subtracts 1 point for each of these transistions.
It sounds complicated but Term-LAB does it all automatically in real time. I'll try to come up with some examples later.
-------------------- "Keep it Loud and Make me Proud!"
posted
basicly if it goes like this you dont really need any subwoofers because the bulk of the bands are higher than 80hz so if you can do a 136 from 80 to 2000hz then taper it off toward the top because its probably going to be hard to do a 136 at 1khz or 10khz or 20khz.
if you have a lil john system that plays real loud at 43hz it wont really matter because once it comes to the rta scoreing you would get close to a zero in that section lol.
posted
Should be intersting at the shows now - but - for someone like me, that's gonna make test and tune at my row house even more difficult!! My neighbors already hate me for burping my ride as it is!!! And what about components coaxially mounted?? Is that a co or comp set?
quote:Originally posted by LowFreq: Why no engine on if it is over 30 seconds?
For safety / liability reasons and to limit the amplification power of the system (like Street).
Thanks for the suggestion on installation. We have discussed that as well. The objective is to find objective judging criteria (instead of subjective).
-------------------- "Keep it Loud and Make me Proud!"
quote:Originally posted by vented: basicly if it goes like this you dont really need any subwoofers because the bulk of the bands are higher than 80hz so if you can do a 136 from 80 to 2000hz then taper it off toward the top because its probably going to be hard to do a 136 at 1khz or 10khz or 20khz.
if you have a lil john system that plays real loud at 43hz it wont really matter because once it comes to the rta scoreing you would get close to a zero in that section lol.
You need a PA system or concert hall in your car.
Actually, a third of the bands are considered bass. (20-200). In a 20-20K systems there are 3 "decades". 20-200, 200-2000, 2000-20000. The concert hall analogy may be close to the mark, however. My showcars (Eruption & Terminator) were designed for the "rock-concert" effect OUTSIDE the vehicle. Early dB Drag Racing vehicles were the designed this way as well. Somewhere along the way we lost the "music", then the mids & tweets, etc.
-------------------- "Keep it Loud and Make me Proud!"
posted
Wayne, if you need judges, I am an IASCA certified SQ- both sound and install and IdBL judge.
Sounds like a good thing. Was planning on Bass Racing and now this too...fun for a high output SQ car.
Thank goodness my compression drivers on my front stage are 118 dB efficient...and will handle 1k watts above 500 hertz. Might have to switch the tube amp out for this and use a Linear Power 3.2 on the horns/tweeters.
-------------------- Team Image Dynamics/Zapco/Werewolf/JK Lab Team Kinetik Sick Bastard Audio SQ Who feels it knows it Posts: 7835 | From: Charlotte,NC USA | Registered: May 1999
| IP: Logged |
posted
this sounds really interesting, i would love to see it in action. would you be able to possibly create a demo video of a run, so we can see what its all about? that would help fully understand it. thanx!
-------------------- -------- 2008 - IM BACK!!!!!!! 120-129.9!!!!!!! -------- Only multi-season competitor with a perfect score at every event attended. -------- 4th place 130-139.9 world finals '06 -------- 2006 nopi nationals 130-139.9 champ! -------- team kicker -------- team xtreme disturbance -------- Posts: 1701 | From: Metter Ga | Registered: Sep 2006
| IP: Logged |
I would like to see more points regards to headunit, (Because this is the biggest marked for all major car audio manufacturers.) This MAY help countries that have problems with getting more support from companies like: Kenwood, Pioneer, Sony, Eclipse, Alpine, Blaupunkt, Clarion, Delphi Grundig, JVC...
Like for eksample: Display colour matches the cars OEM dashboard lights.
Head unit is good installed (like: Double DIN in double DIN outputs = More points, than "single DIN" units in Double DIN outputs.)
OEM steering wheel controllers are working on the aftermarked headunit = More points.
Headunit colour matches the OEM interior of the car = More Points.
Headunit is proberly mounted.
-------------------- Tor Aamodt
*Head Judge at World finals 2004, 2006 and 2007 *Judge at World finals 2002 - 2003 *Norwegian dB Drag Racing Association. (NdBDRA) *Certified multi point judge.
*Head Judge at World finals 2004, 2006 and 2007 *Judge at World finals 2002 - 2003 *Norwegian dB Drag Racing Association. (NdBDRA) *Certified multi point judge.
quote:Originally posted by Tor S Aamodt: Looking good.
I would like to see more points regards to headunit, (Because this is the biggest marked for all major car audio manufacturers.) This MAY help countries that have problems with getting more support from companies like: Kenwood, Pioneer, Sony, Eclipse, Alpine, Blaupunkt, Clarion, Delphi Grundig, JVC...
Like for eksample: Display colour matches the cars OEM dashboard lights.
Head unit is good installed (like: Double DIN in double DIN outputs = More points, than "single DIN" units in Double DIN outputs.)
OEM steering wheel controllers are working on the aftermarked headunit = More points.
![[Big Grin]](biggrin.gif)
![[Frown]](frown.gif)
![[Razz]](tongue.gif)
![[Smile]](smile.gif)
![[Wink]](wink.gif)