Tahoe2004 Posted August 19, 2013 Report Share Posted August 19, 2013 Hello guys This will be my first topic i ever start on this forum yet im planning to take it seriously. I have 8yrs doing car audio systems Yet i have heard people talk about the 4th order box or maybe the 5, 6 order i guess (I guessed numbers for 5 & 6) Yet ma question is on 4th order. How are they build ? What are they made of ? Or what are their difference from a custom box ? I dont know (/.\) maybe u'll find this question very stupid.. U can blame for that I honeslty dont have any knowledge with that 4th order :/ Thx and i hope i can get some help :3 Link to comment Share on other sites More sharing options...
DylanBunch Posted August 19, 2013 Report Share Posted August 19, 2013 its a sealed box firing into a ported box. The port is usually tuned at 40-50hz for high and the sealed side picks up the lows 2006 Ford Explorer 2 Team AA/Sundown 15s 6th order Ct Sounds 7k 4 PRV Mr500 8s Rockford p1000-2 Team Subsonic Lows Link to comment Share on other sites More sharing options...
Tahoe2004 Posted August 19, 2013 Author Report Share Posted August 19, 2013 Can it be tuned lower like to 32 hz ? Link to comment Share on other sites More sharing options...
Kranny Posted August 19, 2013 Report Share Posted August 19, 2013 Can it be tuned lower like to 32 hz ? unless you want to have a usable bandwidth of like 10 to 30hz. "regular" daily tune would be like 45hz. edit: standard box tuning and bandpass tuning are completely different. Link to comment Share on other sites More sharing options...
Tahoe2004 Posted August 20, 2013 Author Report Share Posted August 20, 2013 Im still learning how to use the smd (/.\) @kanny How much is the difference ? Link to comment Share on other sites More sharing options...
TeamHT Posted August 20, 2013 Report Share Posted August 20, 2013 A 4th order is a specific type of bandpass enclosures, and deals with a subwoofer in a sealed box firing into a ported section to help widen the frequency response. Imagine it's both a sealed and a ported box. You should spec the sealed side to manufacturer's spec or F3 I prefer, then tune the ported side to your personal taste. No, you would not want to tune the ported aspect to 32Hz as you would be defeating the purpose of a 4th order. In a 4th order, the sealed section helps provide the flat low end response and the ported increases range by playing the higher registers missed. What you tune to will depend on subs and vehicle. Some make a big deal with ratio, the amount of volume ported: sealed but I don't, or wouldn't. Tell me...does this smell like chloroform to you? Link to comment Share on other sites More sharing options...
Tahoe2004 Posted August 20, 2013 Author Report Share Posted August 20, 2013 Totally understandable But does it takes too much space the 4 order to be done ? Cuz for the very least i know is a BIG box Or am i wrong about that ? Link to comment Share on other sites More sharing options...
TeamHT Posted August 20, 2013 Report Share Posted August 20, 2013 Well...it's a sealed AND ported enclosure in one...so yeah, it can get spacey. Especially if there are multiple subs. Tell me...does this smell like chloroform to you? Link to comment Share on other sites More sharing options...
DylanBunch Posted August 20, 2013 Report Share Posted August 20, 2013 They tend to be pretty big, especially with a lot of subs. A 4th order with a ratio of 2 ported: 1 sealed means for example 2 15s would be a total of about 4cbft sealed, 8cbft ported after all port, sub, bracing displacements 2006 Ford Explorer 2 Team AA/Sundown 15s 6th order Ct Sounds 7k 4 PRV Mr500 8s Rockford p1000-2 Team Subsonic Lows Link to comment Share on other sites More sharing options...
Tahoe2004 Posted August 20, 2013 Author Report Share Posted August 20, 2013 So is like a subwoofer sealed inside the box delivering sound thru the port area ? Is that what it is ? Link to comment Share on other sites More sharing options...
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