Explain Physics

[cleansoundzz 10+ year member]

Can someone explain to me the physics behind one monster 12 in a SPL ported enclosure easily outdoing 2 10's? I recently got a good deal on a RF 12 inch T2 RMS 1000 watts. So I had a custom enclosure built for it which is a little over 2 cubic feet tuned to 40 hz. This s**t is banging really really hard. I also have 2 10 inch RF T1s (600 watts RMS each) in a enclosure built to specs. It bangs really really hard but not like the 1 T2. The T2 I would say is about 30% louder and harder where bass is concerned. How can 1 monster 12 outdo 2 excellent 10's?

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[mmouse57 10+ year member]

is the box for the two 10's ported? and if so whats it tuned to?

 

[cleansoundzz 10+ year member]

Yes the box for the 2 10's is ported. It is tuned to 35hz.

 

[KyleBechtold 5,000+ posts]

talk to thorshammer.. bet his 10's keep up with ya//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[iknownothin2006 10+ year member]

its all in the box.....i came across same thing i had to 10 t1's vs my power hx2 and hx2 owns them even keeps up if not same as my t1 15's too

 

[KyleBechtold 5,000+ posts]

its all in the box.....i came across same thing i had to 10 t1's vs my power hx2 and hx2 owns them even keeps up if not same as my t1 15's too

little something to do with the sub there lol.. hx2 were about the last good sub RF made.. not a fan of the T series

 

[cleansoundzz 10+ year member]

Here are pictures of both the boxes. They were both built exactly to specs.

 

[justin smith 10+ year member]

talk to thorshammer.. bet his 10's keep up with ya//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

151's at 40-41hz with two 10's

 

[guacho80 10+ year member]

Cone Area + Efficiency. T1 10s are not that efficient and the box is tuned lower than the T2. The T1 10's surround is very big, leaving effective cone area comparable to 2 8's.

T2 box is tuned higher, has more xmax (19 vs 14) and is constructed better than the 10s. Hope this helps.

 

[SPLaudio 5,000+ posts]

ur tuned higher and ur impedence rise is prob lower giving the 12 more power. the box for the 10s may have some flex or not loading good...

 

[jdawg 5,000+ posts]

xmax and sweptvolume also come into play

 

[Canaan 10+ year member]

Vehicle acoustics.

40hz "tuning" in a trunk can actually equate to ~32hz 'in car'

Box may work better in your vehicle. Try having a better box built for the 10's //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[tinmanchris217 10+ year member]

Efficiency is the relationship between the acoustic power output vs. the electrical power input. That's where the difference comes from.

SPL boxes mess with the Total Q of the sub+box system. High Q (small box) systems tend to create peaks in frequency response. If the response peaks at +4dB, you'll easily outperform a sealed setup with bigger cone area.

Even setups with low Q can outperform sealed setups, in SPL, transient response, and low freq response. It's all about tuning the box to fit the woofer and you're vehicle. That's why most people advocated ported... because it's the "simplest" alignment that offers significant benefits.

 

[cleansoundzz 10+ year member]

Vehicle acoustics.
40hz "tuning" in a trunk can actually equate to ~32hz 'in car'

Box may work better in your vehicle. Try having a better box built for the 10's //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

This is in a Toyota 4-Runner SUV

 

[cleansoundzz 10+ year member]

I am still amazed at this 1 12. Now I see why people have 1 woofer setups in their vehicles.