how to get a hair trick in a gmc sonoma

[matthewperegrin 10+ year member]

I have 2 DD 2512 4.6 cubes @36 hz and was wondering if a 1 9515 would be capable of doing a hairtrick and be louder on a DD m3a @ .5 ohm and wat frequency is needed for a hairtrick

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[pro-rabbit 5,000+ posts]

ext cab? You should be able to do one with the subs you have now. You just might have to build differently for it though.

 

[matthewperegrin 10+ year member]

Pro rabbit wat do think is the way to do it in my truck

 

[Fi-brations 10+ year member]

Is it just a lot of spl at a low frequency that causes it?

 

[T3mpest 10+ year member]

Mostly.. The vehicle characteristics make a big difference too. The more air tight the vehicle the better off you are as then the air will have to leave out the window that you roll down, door you open, etc.. Box positioning and size makes a huge difference too.. My last single 15 could move more air than my 2 15's do now, at least in terms of approaching a hair trick.. You have to have good airflow around the box and into the cabin... That's why trucks and SUV's do better than trunk cars.. it's also why trunk cars tend to do better with smaller sized boxes in relation to the trunk size and sealed firing forward into the car is best, YMMV however. In general, assuming you have enough room to get airflow around the box into the cabin, you want big boxes with lots of cone area, it really is just displacement down low. Every time you drop one ocatave (1/2 frequency) you need to move 4x the air to maintain SPL.. So 140db at 30hz moves 4x the air around that 140db at 60hz would. If you get too low in frequency though it gets hard to generate any kind of needed SPL.. Seems like most cars do tricks best from 25-35. Above 40hz doesn't seem to "look right" anyway as the hair vibrates as much as it flutters.. good hair trick it just kinda floats..

 

[bhsdriller 10+ year member]

might be kinda hard on 2 12's....even on 1 15 with a lot of power. Guess it depends on the box

2 15's in an ext. cab can do it easily

 

[Bettr n' Revrse 5,000+ posts]

 

[pro-rabbit 5,000+ posts]

might be kinda hard on 2 12's....even on 1 15 with a lot of power. Guess it depends on the box
2 15's in an ext. cab can do it easily

Naw, fairly easy to do a basic hair trick with 2 12s in an ext cab truck. Just need to work on generating a large amount of air movement rather then just being loud.

 

[itsblown 10+ year member]

Naw, fairly easy to do a basic hair trick with 2 12s in an ext cab truck. Just need to work on generating a large amount of air movement rather then just being loud.

please grace us with your box building knowledge of how to move a cubic **** ton of air.

Ive been wondering alot about box designs lately does a bigger box mean more air movement?

 

[mazdakid 5,000+ posts]

i can do it in my civic on 2 12s with the same amp.

was that your red gmc at the elgin show yesterday?