raymondterry93 Posted April 13, 2015 Report Posted April 13, 2015 welp originally it was suppose to be 29hz and 6.1cubic feet some how and way it came out to be 7.4 cubic feet tuned to 24-25hz... let me atleast say this i only spent about 50 bucks for wood and parts so i really dont care if it doesnt work and need to re build i am fine with that because now i do not have back seats lol! i used 12volt to calculate the tuning and also WINisd but im pretty sure all in all my box building skill suck port is 3inches wide and 18 inches long with 5 inches left before i touch the back of the box. is this enough port surface? but my question is. will my MTX 9500's 12's blow from using this huge box im using a audiopipe 1500.1 so each speakers sees a little over 750rms.
boometro Posted April 13, 2015 Report Posted April 13, 2015 that box size should be just fine with those subs. i would suggest getting a better quality amplifier for them though. each sub can easily handle well over the 1000w rating. i personally have used them and know you can use at least 1500w per sub clean power all day. that box should perform pretty well on low bass if built properly. double baffle the entire box while using supports inside.
raymondterry93 Posted April 13, 2015 Author Report Posted April 13, 2015 that box size should be just fine with those subs. i would suggest getting a better quality amplifier for them though. each sub can easily handle well over the 1000w rating. i personally have used them and know you can use at least 1500w per sub clean power all day. that box should perform pretty well on low bass if built properly. double baffle the entire box while using supports inside. well i mean i scilliconed all the crackes that fucker is air tight and i got a buzz off of cause i made sure all the cracks were filled and the out side im going to do today but i do not have supports EDIT: i hhave .75 thick wood still need to double up or just supports?
Triticum Agricolam Posted April 13, 2015 Report Posted April 13, 2015 I wouldn't worry too much about your tuning being lower than you intended. How did you check it anyway? 7.4 cubes net is pretty huge for two 12"s. It's going to lower your power handing a bit and may give you some pretty peaky output. If you don't want to rebuild you can put something inside to take up some of the space. This will raise your tuning some too. You can use closed cell foam board insulation for this. It's cheap and doesn't add much weight. Just make sure you keep it away from the port and glue it in there so it doesn't move around. You said your port is 3" wide and 18" long, but how tall is it? Maybe a picture of your box would help. Double-walking the whole box is a waste of material and weight. A double baffle is a good idea but single thickness walls everywhere else are perfectly fine as long as you use some bracing. You can use dowels to add bracing since the box is already built. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
Broke_Audio_Addict Posted April 13, 2015 Report Posted April 13, 2015 Isn't the same pressure applied on all sides of the enclosure? I think making all the walls the same thickness makes sense. That being said a lot of people's definition of "music" is a clipped 30 hz sine wave with some 80 IQ knuckle head grunting about committing crimes and his genitals.
ALPINE408 Posted April 13, 2015 Report Posted April 13, 2015 Double up the whole box for 2 12s and 1500 watts Lmao.... What a waste.... And is it 7.4 cubes net or gross? What are the outer dimensions of the box? Have you ever had your woofers blown?
Triticum Agricolam Posted April 13, 2015 Report Posted April 13, 2015 Isn't the same pressure applied on all sides of the enclosure? I think making all the walls the same thickness makes sense. Sure pressure is equal, but panel stiffness is not. Baffles are always going to be weaker because of the big ass holes we have to cut in them for the subs. Those holes also make it more difficult to get bracing where it will be the most effective, the middle of the panel. The goal with any box design/construction is to have a box that is stiff and won't flex. Doubling up panels will accomplish this, but proper bracing can usually do it better while using less material and adding less weight. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
ALPINE408 Posted April 13, 2015 Report Posted April 13, 2015 Isn't the same pressure applied on all sides of the enclosure? I think making all the walls the same thickness makes sense. Sure pressure is equal, but panel stiffness is not. Baffles are always going to be weaker because of the big ass holes we have to cut in them for the subs. Those holes also make it more difficult to get bracing where it will be the most effective, the middle of the panel. The goal with any box design/construction is to have a box that is stiff and won't flex. Doubling up panels will accomplish this, but proper bracing can usually do it better while using less material and adding less weight. It's 2 12s and 1500 watts.... I Damn near did a 150.0 dbs on .75 single thickness PARTICAL board no bracing. With the same powerAnd same size subs...I love over kill to but jesus you guys are ridiculous Have you ever had your woofers blown?
Triticum Agricolam Posted April 13, 2015 Report Posted April 13, 2015 It's 2 12s and 1500 watts.... I Damn near did a 150.0 dbs on .75 single thickness PARTICAL board no bracing. With the same powerAnd same size subs...I love over kill to but jesus you guys are ridiculous Eh, I brace pretty much every box, then I never have to worry about it. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
ALPINE408 Posted April 13, 2015 Report Posted April 13, 2015 I brace what I can to I agree with that but some of the comments where way over board imo double up with bracing Have you ever had your woofers blown?
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