Just a continuation from the what I said in the other topic, there seems to be a trend that the more woofers you have, you get disproportionate returns in SPL.

Some factors that may account for this are:
- people who use more woofers tend to buy cheaper ones
- there is less space to have the optimum enclosure
- it is more difficult to power more woofers
- you get more cancellation.

The same could also apply to amps as well, due to issues of current supply etc.

At the recent comp I went to (my first comp!) the competitors in my class (single 12" or 2x10's) had generally bigger SPL scores than people in the above class.

I would just like people's thoughts on this topic, and any examples they have seen that shows less can be more...


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2001 Lancer GLXi
* HU: Sony XRC450 + CDX636 10 stack cd
* Front: Clarion SRS1623
* Rear: Sony XS7694 6x9's
* Subs: Sony XSL1235 in ported box 2.5cf @ 38hz
* Front amp: Sony 1502SX
* Sub amp: Alpine MRV1507
* Loudest to date: 141.3 db

Many many more people are competing in lower classes, so those people really have to try hard to beat others.

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Car: '90 Nissan Pintara (sedan)
Headunit: JVC KD-SX750
Fronts: TotalRecoil Carsplit.6
Frontamp: Alpine MRV-T301
Sub: 2x Alpine SWR-1240D
Subamp: Lanzar VPro 2000D
SPL: 146.4db
-1st 161 to 280sqin Bathurst Livewire 12/10/02-
"If its not quick, may aswell make it slower"

It's easier to get it right with just one woofer.

You see cars all the time that barely manage mid 140s off four 15s etc. This is normally because they end up with woofers that face the wrong way (cancellation issues) or boxes that are too small etc.

Phil

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SPL KINGS 2001
161.0dB Amateur Record, set BAS 2000
153.4dB Loudest Sedan
158.5dB Loudest SS 1-2 (single DD 9515)
160.8dB Loudest SS 3-4
166.2dB Loudest to Date
TEAM DD

more is more but less is easier to get right. hehe


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Team Tycoon - Dollars n dB's
a little Beyond Audio and a little Power = BUUURRRRP

i was talking to my car audio installer yesterday and origionally they said for me to go a 1.5cu.ft box ported.

i then told them i wanted to compete in SPL comps and they said to go DOWN to a 1cu.ft box ported. tuned at 45hz.

don't quote me fully on this as he didn't run this setup through the computer so it might be best at 1.5cu.ft. but something to think about none the less.

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I expect to see BIG numbers in SS 5-8 and 9+ in the US next year

other factors are, since it is cheaper to buy less woofers, there are more competitors (thus more serious competitors) in the lower woofer classes

SupraBOY - what woofer? although 1 cu/ft tuned to 45hz would be a very bad SPL box for most woofers I can think of

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- A proud member of Team Gates - A proud supporter of the CAA SPL project

What I really wanted to get from this tread was whether running 1x12 or 2x10's would give me the greater chance for more SPL.

I am looking to hit 145+, which is doable with 1x12. I tried it yesterday by just sticking other subs (Eclipse and Type R) in my current box, and I hit 143.7 & 143.3 respectively. I would think that in their ideal box these subs would do 145.

What do people think?


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2001 Lancer GLXi
* HU: Sony XRC450 + CDX636 10 stack cd
* Front: Clarion SRS1623
* Rear: Sony XS7694 6x9's
* Subs: Sony XSL1235 in ported box 2.5cf @ 38hz
* Front amp: Sony 1502SX
* Sub amp: Alpine MRV1507
* Loudest to date: 141.3 db

2x10's... more motor strength. Although possibility of cancelation. 2x10's in a single chamber, single big port is what I would be putting my money on.

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Car: '90 Nissan Pintara (sedan)
Headunit: JVC KD-SX750
Fronts: TotalRecoil Carsplit.6
Frontamp: Alpine MRV-T301
Sub: 2x Alpine SWR-1240D
Subamp: Lanzar VPro 2000D
SPL: 146.4db
-1st 161 to 280sqin Bathurst Livewire 12/10/02-
"If its not quick, may aswell make it slower"

I'd also say 2 10s, but if you get one 12", then when you want more SPL it will be easy to get another 12" :-)

The main issue is that I don't think I have the bootspace for the optimum boxes for 2x12's. Plus, they cost more!

oh come on. glass out the spare tyre well and load off the bootlid..... you'll have plenty of room