Size for box?

[Dr_Love]

Im building a box to house 2x 12" Clarion subs..

does anybody know how many litres its supposed to be?

thanks

[=premo=]

sealed or ported? and what wrms are the subs?

[Al]

Do you have the full spec sheet? If not do a search on google for the model of your subs and it will tell you the best type of box and size.

[BADHAB|T]

rms is irrelevent.

Al is correct. You need to build a box with the specified volume from the manufacturer. It will sound like crap with the wrong size box. Not all 12" subs require the same volume.

[Dr_Love]

its a the SRW3081

cant find anything on the net to tell me about it. Thousands of places to buy more of them but nowhere telling me how to put them in.

[Dr_Love]

i found some dude who was selling his shit and claimed that a 2.5 cu ft box was spec. i hope the guy was right. he seemed pretty proud of them..

if anyone knows better than this, please email me what you know at [email protected]

thanks for your help everyone..

[djhatton]

dude each driver needs 1.25cu/ft or 35.39606 litres. the t/s parameters and .pdf manual etc are on the US clarion site under "support->search->SRW3081".

somewhere around 35 litres each would be just fine.

d

[Fhrx]

rms is irrelevent.

Al is correct. You need to build a box with the specified volume from the manufacturer. It will sound like crap with the wrong size box. Not all 12" subs require the same volume.

If I may be so bold I might just pull you up on that comment champ.

When I design enclosures for subwoofers the T/S specs are not the only thing that I use in th PC. Power availability does have a huge impact on the design of the enclosure, as does the size of the car, the volume desired and the music styles listened too.

The most peculiar thing is that once the enclosure has been designed it often is no where near the recommended size. This is because many manufacturers often recommend the safest enclosure volume for minimal returns rather than the absolute best performing enclosure.

Just wanted to get that out.

[BADHAB|T]

Fair comment. I dont design them, we just sell/install a sub with the box size the manufacturer suggests.

I guess its like a car. How detuned is a Skyline for example? Increase in flow in and out and the power goes up, alot.

They are effectively designed in 'safe' mode

[Fhrx]

True that champ.

Very true. Like my S15 that came from Nissan with its 1.85" exhaust!

[nova_1]

Im building a box to house 2x 12" Clarion subs..

does anybody know how many litres its supposed to be?

thanks

Dear Dr _Love, If you have a Jaycar DealerShip near you, they have a cd-rom to calculate the size of box to build as apossed to the speakers you have, hope this helps?

nova_1

[Viper_r32]

39 leters is about the average size these days for a seald box as most subs for cars are, a seald box will allways make a sub produce more power. but on the other hand a ported or somtimes larger box will give the sub a nicer tone or note but is not done very often in cars as when you drive most of what you hear will be DOF! DOF! DOF! most peple in there teens or mid 20s dont realy care to much for tone as they prefer max volume - "if its to loud, your to old!"

[djhatton]

hey just gonna pull you up on a few points there mate....

39 leters is about the average size these days for a seald box as most subs for cars are, a seald box will allways make a sub produce more power.

no, a sealed sub box will not produce more power. neither sub, nor enclosure will produce any power increase.

but on the other hand a ported or somtimes larger box will give the sub a nicer tone or note but is not done very often in cars as when you drive most of what you hear will be DOF! DOF! DOF! most peple in there teens or mid 20s dont realy care to much for tone as they prefer max volume - "if its to loud, your to old!"

ported/bandpass enclosures don't necessarily give a sub a nicer tone. in "most" instances, ported enclosures are used to optimise the output at or between certain frequencies. this is why you'll find most serious spl competitors using vented boxes and, lets be frank, most spl cars sound like ass when it comes to linearity and natural reproduction. vented boxes don't sound "nicer" in most respects either. while there are many drivers that sound lovely in the right ported/vented alignment, sealed designs usually offer much higher transient response (tightness/punch/impact/whatever adjective you like to use).

on one other note there, you're right in that increasing a sealed enclosure's volume will decrease Q (improve the sound.. sometimes). having said that, you shouldn't take a driver that sounds crap in a 30l enclosure and put it in a 100l box and hope it sounds good...

/end rant

d

[Fhrx]

Exactly.

[Viper_r32]

it is a known fact that a seld sab will always handel more power than a venteted one becouse the air in the box will pull the sub back faster than a ported so it dosent distort if you turn up the volume that little bit higher.