tre of false 151- 149 db in street 1

[lilboom 10+ year member]

so as the title says there a chart on meca site saying there are 2 guys breaking 145 db in street 1 class anyone have any info on how this was done of possible

i think ther's a typo maybe idk of 20 people 2 manage to break 145 not only that but a 149db and a 151dbis this possible let alone tru

(Total Amperage of In-line Fusing X 10) + Woofer Cone Surface Area}= no greater than 550)(street 1 )30 amps + 1-15 = 477 did they have 4 10's and 100 watts ?

Click to read more...

 

[infamous_e46 5,000+ posts]

cheater amp and 4 very effecient 10's

 

[infamous_e46 5,000+ posts]

US Amps VLX-25 was 25 watts @ 4 ohms mono and would do over 1500@ 0.25 mono.

that amp and a few of those and u were in business

 

[LosIsATool 5,000+ posts]

Im going to try and see how low I can drop my fusing this weekend. Im trying to get in S1 and Im over 145.. I need to get a 30 amp fuse to not blow to fast

And I think its 550

 

[lilboom 10+ year member]

Im going to try and see how low I can drop my fusing this weekend. Im trying to get in S1 and Im over 145.. I need to get a 30 amp fuse to not blow to fast
And I think its 550

yes 550 thanks for the correction.. well i knew something was up anyhow cool stuuf thanks i need somthing like that

i actually dont get how it still qualified for street 1 with such large fusing unless its the power rating and not the fuse???

 

[hispls 5,000+ posts]

The way I would go about "cheating" this is high voltage/low current. Have a big box with a lot of extra rise and plan to burp right at box tuning or woofer's Fs(your impedence peak), you could very easily see 20 to 40 ohms. This strategy has your subs running at their most efficient point and allows reasonably low current demands. Also I'm not sure what the rules are on types of fuses, but most fuses blow a little over their rating so possibly running a bunch of small fuses would be a supperior strategy as well?

What modifications are allowed to the car? Does that allow CRX/Yugo/Panda? Perhaps a very efficient box in general? A horn or complex bandpass? Sadly you're more likely to get inside Area 51 than in the back of record breaking SPL cars.

 

[Kangaroux 5,000+ posts]

Some really inexpensive fuses aren't made that well and will actually take more than their rating.

 

[pieper88 10+ year member]

cheater amp and 4 very effecient 10's

You must have NO idea how MECA works. Cheater amps are useless

 

[infamous_e46 5,000+ posts]

You must have NO idea how MECA works. Cheater amps are useless

you are correct i have never competed now explain rather than just passing judgement

 

[mlstrass 5,000+ posts]

you are correct i have never competed now explain rather than just passing judgement

They don't go by 4ohm or whatever power rating of the amp, so there are no "cheater" amps. It's how much current you can get through the fusing. Makes ZERO sense for street cars and is why I don't bother with MECA

Surprised TimmyK hasn't posted in here, he seems to know a little about how MECA works...

 

[tommyk90 5,000+ posts]

Cheater amps do absolutely no good in MECA. The fuses right before the amp(s), which are mandatory, are what determines your power/class. The amp rating or onboard fuses are irrelevant to your pressure class. It's ALL about the fuse within 18" of the amp(s) on the power wire. You can run a Soundigital 16k in S1 if you wanted. Not that you'll get anywhere near full power, but you could run it if you wanted to.

150+ is EASILY achievable in S1 with the proper equipment and vehicle. One 12" and 800 watts in my truck will be darn near, if not past, a 150.

Most fuses that MECA competitors use will stand up to at least 3x their rating. So say you have 2 10's and a 30 amp fuse in S1. That 30 amp fuse in reality will probably let 90 amps through without blowing. Figure up decent voltage, impedance rise, etc. and you can have over 1000 watts in S1 without breaking a sweat. I know some guys who can get substantially more than that.

I've posted an easy 152 in S2 with one 12" and about 3kw back in 2009. I could probably get close to running that setup in S1 if I found the right fuse. And that score is from 2 years ago, I've learned a few more things since then. Hell, last year at finals two guys were past a 150 in S1.

 

[lilboom 10+ year member]

Idk about the fuse thing, i dont think thats how it works all the time i think the total rms of the amp + cone so how would do s2 with 3k(11.9 volt rated 1500 watt amp)

because sounds like you are the guy i should be talking to, That 1 12 setup has me sold although i may not pop 150 db's im in a trunk car.

And x2 on the tuning.

 

[tommyk90 5,000+ posts]

Idk about the fuse thing, i dont think thats how it works all the time i think the total rms of the amp + cone so how would do s2 with 3k(11.9 volt rated 1500 watt amp)
because sounds like you are the guy i should be talking to, That 1 12 setup has me sold although i may not pop 150 db's im in a trunk car.

And x2 on the tuning.

If you are a MECA competitor and trying to get points for finals, your class is based off the cone area + (total inline fusing x 10).

So if you have 2 10's and a 30 amp fuse, that puts you at 457 (78.5+78.5+(30x10)). Like I said, depending on the style of fuse and your amps efficiency, you easily see 1000 watts out of that one fuse.

The only time MECA will use an amp rating is for non-members who aren't collecting points for finals.

 

[cmobley 10+ year member]

Well I witnessed the 151 (Chris Releford) at Carl Casper in KY and its out of a CRX on 2 12"s with a 30 AMP fuse. The other one is my teammate on Livewire with 1 15" on 35 AMPS of fuse out of an extended cab Ranger. Both setup are very efficient. I have been competing heavily this year in MECA and hopefully I get my Finals setup to be as efficient as theirs.

I can tell you this Team Livewire is going to be VERY well represented at Finals. Best of luck to everyone though as its all in good fun.

 

[LosIsATool 5,000+ posts]

I thought CRXs where not allowed in MECA?