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My SPL car - Going for an Australian Reocrd 

 

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Posted: Mon Feb 13, 2006 4:42 pm 
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Ride: BF MKII XR6 Turbo

Location: Victor Harbor
SA, Australia

Ahh i know what thats like Aaron lol second concience... Buuut with all that doof doof going how could you hear it. :roll: j/k Looks good so far mate, thats some hefty looking cable!!!

 

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Posted: Mon Feb 13, 2006 5:33 pm 
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Ride: BA XT Series 2

Location: Cairns
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Either way both gotts ta be beyyer than diesel fitting.

 

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Stage 1 stereo install done. Pics in audio section.
Next step is probably a nice exhaust or stage 2 stereo.

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Posted: Mon Feb 13, 2006 6:57 pm 
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Ride: Mazda SP20

Location: Albury
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My brother (tjb45) pointed this post out to me as I used to have an identical model TX5 (just non-turbo). Nice project you've got going. Just going to point out that I had a semi-decent system in my old Telstar and I found that mine had bad leakage problems from the hatch seal near both rear corners. It got a lot worse once a granny hit the rear end but it was there beforehand. Don't know if you'll have the same issue, but it may be something to watch out for.

 

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Posted: Fri Feb 17, 2006 8:15 am 
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Ride: FG Turbo Territoty Ghia

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Ok first round of testing is complete.
We got 125.2dB by slamming the boot shut and after practice a maximum of 126.7dB.
Not bad considering for just shutting the boot and considering there were no speakers in the car at that stage.



On a serious note testing showed the port tuning is too low for these woofers and I need to build a new port tuned higher.

So far 147.8dB is the best we have recorded at 50htz

The Amps are producing 3,291rms per pair which is good so the power supply system is obviously set-up correctly.

Now there is heaps more tuning to do + plenty of fine adjustments and trialling such as box positioning in the car, more more rounding of the internal box itself etc…

 

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Posted: Fri Feb 17, 2006 8:22 pm 
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pyroay wrote:
Ok first round of testing is complete.
We got 125.2dB by slamming the boot shut and after practice a maximum of 126.7dB.
Not bad considering for just shutting the boot and considering there were no speakers in the car at that stage.



On a serious note testing showed the port tuning is too low for these woofers and I need to build a new port tuned higher.

So far 147.8dB is the best we have recorded at 50htz

The Amps are producing 3,291rms per pair which is good so the power supply system is obviously set-up correctly.

Now there is heaps more tuning to do + plenty of fine adjustments and trialling such as box positioning in the car, more more rounding of the internal box itself etc…


147.8 not bad for still test and tuning...nice work dude that 150db mark certainly look achievable and hey if anyone can do it..itd be u

 

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Posted: Sat Feb 18, 2006 9:28 pm 
Getting Side Ways
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Ride: BA XT Series 2

Location: Cairns
QLD, Australia

Wow nice numbers there. Should be sweet as!

 

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Stage 1 stereo install done. Pics in audio section.
Next step is probably a nice exhaust or stage 2 stereo.

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Posted: Sun Feb 19, 2006 10:10 am 
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Still a lot of tunning to go. got 145.7dB on the wekend and was a bit dissapointed.

Then after the comp realised the earth cable had come out of one of the amps, which menas 2 amps were down since they are strapped so 145.7dB is not too bad from 1 sub.

 

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Posted: Sun Feb 19, 2006 8:37 pm 
Getting Side Ways
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pyroay wrote:
Still a lot of tunning to go. got 145.7dB on the wekend and was a bit dissapointed.

Then after the comp realised the earth cable had come out of one of the amps, which menas 2 amps were down since they are strapped so 145.7dB is not too bad from 1 sub.


hehe nice let us know how she pulls when its all runnin :P

 

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Posted: Mon Feb 20, 2006 7:36 pm 
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Ride: BA XT Series 2

Location: Cairns
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wholy crap that is awesome from 1 sub. Dam i am jealous as. I wana build a cheap version using an escort pannel van and a couple of kicker solabaric 12 subs.

 

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Stage 1 stereo install done. Pics in audio section.
Next step is probably a nice exhaust or stage 2 stereo.

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Posted: Fri Feb 24, 2006 2:37 am 
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Ride: BF MKII V8 Fairmont Ghia

Location: Perth
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looking good...

heres a nice collection of cars... some of which have some good figures

 

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Posted: Mon Mar 06, 2006 1:46 pm 
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Well on the reccomendadtion of someone in the know i changed to a Bandpass box and after just over 15hrs of testing the results are dissapointing.

Going for a smaller ported box with a higher tuning freq so we will see how we go.

Testing on Wed night

 

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Posted: Mon Mar 06, 2006 1:57 pm 
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you must have some nice neighbours!
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Posted: Mon Mar 06, 2006 2:35 pm 
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doe sall teh extra weightmake much of a differnce to driving when (if) i get my car up will prolly have to drive it everywere (intersate to comps) we will ahve to catch up some time oh and giv eus yell if u need more busbar or any thing like that
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Posted: Tue Mar 07, 2006 7:54 am 
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Bandpass boxes have interesting properties when compared with ported and sealed boxes.

I graped one up with a certain front to rear chamber ratio and it showed that subs maximum output occured with the minimum x-max.

That is great if your sub has a high electrical power handeling and relatively low X-max such as these speakers, but because of the sealed side there is much greater resistance on the cone (hence reduced x-max) and that also results in lower output.

They also have a peak plateau, rather than a single peak point so you have a range of points that are all quite loud.

Overall suited to to situations where you have a sub with a strong electrical motor and limited s-max + plenty of power.

In this application there is no where near enough power to get the subs working to their maximum in this design and hence overall output is moderate.

Going to try a 180lt ported enclosure on Wed night. Will post more pics tomorow.

 

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Posted: Wed Apr 12, 2006 8:49 am 
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Well good news and bad news.
This car is being SOLD.
It is simply not the right car for the job and it will be sold over the next couple of weeks.


Good news is that we have found the car we need. I borowed it from a friend and did some initial testing and we have already suppased at least 1 x Auatraliian Record and the magic 150dB mark.

Now all i need to do is raise the $8,000 needed to buy one for myself and we are in business.

PS: Before you all ask he is selling the car too so no i cant just use his one.
Anyone got a spare Mirage??

 

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Australian SQ Champion – Pro Show 2006 & Best of Show
Ford Champion - Melbourne 2004 & 2006
451.5wkw - now SOLD

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