Anyway, I have trained at MERA knowledgefest and trained worldwide. MTX sent me to China, Macao, Taiwan, Japan, Malaysia, Korea, Singapore, Greece, England, Germany, Panama, all over Mexico and who knows where else...

Due to serious personality comflicts, I am no longer with MTX, but I achieved my goal!

My current interests are all forms of audio. I love to design and build custom home audio and home theatre loudspeakers from scratch with fine European drivers since America can't make a great speaker to save their life. WE SUCK!!! I design and build passive xover networks, small and huge with all of the goodies.

I am now working for a single shop in Awesome Coeur d' Alene, ID called Sound Decision. I am back to my roots as an installer. I love REAL SQ vehicles. Not too many people up here can appreciate it though. I am working on this... But whiloe all of this is nice. I feed off os SPL! I live for it! In the '90s I has set 2 world SPL records in the AMA 1001 class with Chad Burchetts Cherokee. I also set a few NSPL records. MTX sent me to Malaysia and Greece to build SPL vehicle for the distributors, Both set their World records! And I belive that they still stand after a few years! Shouldn't our records be called USA records?! Other countries are still part of our world, ya know!!!

I am currently building my own DB Dragster. I own it, bot somebody else whaich is a change. I was tired of building other vehicles and getting little to no credit. It is fully sponsored by Memphis, Dynamat, StreetGlow, and partially sponsored by Streetwires. It will not set any records, but tit will be the loudest thing in the area. The loudest vehicle around here has the usual 12 12" subs and barely hits 152s. There is major growth happening here right now. They are just learining about Fukuda and Alma... I plan to destroy the scene with my 4 LVS 15' subs from Memphis...

Anyway, I guess that wasn't brief at all... Sorry... Well, I am here for help. Whether it be abotu SQ, SPL, A-Periodic Membranes, kick panel alignment, or whatever... I am here.

Peace all,

Grizz

P.S. If you heard the rumors about my many piercings, tattoos, shaved head and psycho mental condition, you heard right! But it's all good, 'cause God loves me anyway!!!

In a nutshell... I have been in the industry for many years and got my start installing in the early '80s. I moved to AZ in the mid '90s to start a new career. MTX scooped me up. I started as Tecnical support, then moved to a Regional specialist position which sucked.

My all time dream was to be a tech trainer and to travel the world teaching what I had learned. Ya see, in the '80s we didn't know ****! No kickpanels, no AP mats, No Transfer Function, no knowledge... We had to learn and teach ourselves...

I became a trainer at MTX and acheieved my goal. I then progressed up to be the Director of Education for MTX. This was the ultimate experience!!!

-This is where I accidently deleted my last post-

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Check out the Team Devastator website!!

quote:

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Originally posted by pd071:
What up grizz....! what kind of numbers are u planning to do with those memphis subs? what amp setup?

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Each Memphis LVS15 sub will have 2 Memphis 1000D amps for well over 2,00 watts each. Numbers, I'm not saying yet... :^)

quote:

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Originally posted by d.b.spl:
Grizz,good luck and I know you do good.It is about time some one like you got A-hold of some good equipment,lol.

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Thanx! We love Memphis! I have buttloads of Mempis in stock! We sell more Memphis than anything...

quote:

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Originally posted by Devastator:
Well Grizz I hope that your car will put up some good numbers this summer. I can't wait to see it at your guys' events.

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What's up local dude? Will you be competing? My new SPL booth/stand/thingy is almost done. Just needs paint. The meter is installed, the 2' LED screen is in and some new funky things are on the way. You've never seen a booth like this one. Quite comical actually...

I digress...

Man I would have loved to travel and do stereo stuff.

quote:

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Originally posted by SS Mobile Xcitement:
Grizz, Can you tell me the design differences between an AP setup with the mat on the front and the mat on the back of the speaker. Are they "tunned" the same way? Any special considerations? Thanx in advance!

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Very similar. I have a tutorial on the www.teamrocs.com website that gets into detail a bit. Go to the site and go into the technical section then scroll down.
It is simply called Aperiodic Membranes... Let me know if you need more than what is there...

quote:

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Originally posted by winslow:
Having been to Greece and reading European car audio magazines, I second that about the SPL being low "over the pond." Those guys are just now getting DD, MMATS, Diamond, Eclipse, and a few other brands that we have. And we need to get their Phase Linear products and Genesis.

I digress...

Man I would have loved to travel and do stereo stuff.

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The job was a priceless experience! But I wouldnt do it again for MTX for any amount of money!!!

Greece has everything we have mostly and their own badass stuff. You know about Phase Linear, but what about Mission? have
you seen their round badass amps?! I want that stuff...

Greece is probably into the 160s by now which is more than I can say for my area where I live in the Northwest... That'll change!!!

Yeah, I went to a shop in Crete and started looking around (saw the Alpine sign), and tried to talk with the employess. They were friendly guys, but had little english skills, and I had less Greek skills. Turns out that one of the guys was the Greek champion in their version of Iasca. He had 3 Solo 15s in the truck of his car, and Kicker amps. I was impressed by the fact that all work is done in the front, in the open- not like shops in the states.

Couple of thoughts, So basically when mounting woofers in the rear deck, its tunned just as if the mat is on the back of the woofer. Are there any losses due to the fact that the cone is no longer directly coupled to the cabin? approx 1-3db??? Also what do you use as the damping material? Pink, yellow fiberglass?
thanks again.

quote:

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Originally posted by winslow:
The round Missions? Yeap, I saw a car in a UK magazine that had the Mission amps and subs- it looked real cool. Good equipment?
What about DLS? Guess that we in the state will never know.

Yeah, I went to a shop in Crete and started looking around (saw the Alpine sign), and tried to talk with the employess. They were friendly guys, but had little english skills, and I had less Greek skills. Turns out that one of the guys was the Greek champion in their version of Iasca. He had 3 Solo 15s in the truck of his car, and Kicker amps. I was impressed by the fact that all work is done in the front, in the open- not like shops in the states.

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The stuff is good and is made in England. Di you see the car with the polished amps in the rear hatc area? My friend Dell built that vehicle. He now works for Mission...
As for DLS, they were showing product at CES... Yeahm they do things a little diferent. It is bad to be a DIYer. They do not have Home Depot type places to buy your own tools to do things yourself. Everybody pays other for whatever service they require... But hey at least you can always get a Heineken with you value meal at McDonalds!!!

quote:

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Originally posted by SS Mobile Xcitement:
Thnx Grizz,

Couple of thoughts, So basically when mounting woofers in the rear deck, its tunned just as if the mat is on the back of the woofer. Are there any losses due to the fact that the cone is no longer directly coupled to the cabin? approx 1-3db??? Also what do you use as the damping material? Pink, yellow fiberglass?
thanks again.

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The tuning is done in the actual design of the membrane. You see, the mebrane is designed to achieve a desired Q which in turn yields 100% preditcable response. The mat dampos the cone motion in a sense, so whether it is behind the driver in the smallest enclosure possible, or mounted to the front of the driver makes no difference.
There is no los when the mat is mounted to the front of the driver. think about it for a second... The mat controls the cone motion and Q of the driver so it doesn't really matter where it is...

There is a bit of a loss with an Aperiodic membrane but that will happen regardless of design... They will also rolloff slower, typically at about 6dB @ octave rather than 12dB @ octave like an acoustic suspension enclosure.

As for materials. There are several things you can use. Regular fiberglass insulation will not work all that well. It is too "loose". I like to use 3oz. Duct Board. The density of the material you choose will also have alot to do with the thickness of the mat and the required amount of mat area!!! There is no golden rule.

I saw that car with the Mission equipment in the magazine- cool looking stuff.

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Originally posted by SS Mobile Xcitement:
Alright then.. In your last post you threw a new one at me. The area of the mat, I didn't even consider this. I just took for grantid that the area is usually a little larger than the speaker. I'm going to have to think about this one.. and get back to ya.

"Til next time"

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Maybe you thought they needed to be larger because theo Wavemods have to be. All of the mats that I have built are smaller than the cone area, and if you are using multiple drivers, then you need to make even more modifications. For instance, In my Bronco, I had 5 8" subs ina common Aperiodic membraned enclosure. The design I came up with used a mat that was equalt to 60% of the total sd of the 5 drivers. It played much tighter than my 4 15" thaT I used for SPL as expected. It was taut and hit every transient note I could throw at it. It even played the double bass baeats of Pantera which is not easy feat without some sloppines or coloration... Here is what may amaze you. According to my meter tha 8" could play just under an octave lower than the 15"!!! I could listen to Tracy Chapman and like the sound even with the 15" subs. But with the 8" subs, I heard alot more music that the 15" were incapable of playing. The 8" were the best subs I had ever heard...