Wedge at end of port to increase port velocity
|
Silver Member Username: HowtoeatapencilPost Number: 170 Registered: Mar-08 | The friend thats helping me build my box reccomended i put little wedges at the end of the port, so at the opening it has less surface area and will have more velocity. What would putting wedges at the end do? <img> something liekthat |
|
Gold Member Username: InsearchofbassPost Number: 9572 Registered: Jun-04 | you dont want more port velocity you want less and flaring like in the case of aero ports achieves that....you can flare a slot port also |
|
Gold Member Username: Van_manBoston South, MA Post Number: 4040 Registered: Mar-06 | As sean stated, And stop having yur friend help you. He doesnt know jack. google flaired port pics, and you will see they are the oppisite of that pic. Also kerfed ports work well too. |
|
Gold Member Username: InsearchofbassPost Number: 9575 Registered: Jun-04 | yeah with a statement like your friend made it doesnt seem like he knows alot |
|
Silver Member Username: HowtoeatapencilPost Number: 171 Registered: Mar-08 | dang he seems like he knows alot, would that just make it sound shitty? does it have ANy advantages? |
|
Silver Member Username: Imi4tth3wSan Antonio, Texas USA Post Number: 173 Registered: Feb-07 | if there was a curve in the port INSIDE the box i can see how that would work cause thats how my box is but as its going out? =/ |
|
Gold Member Username: InsearchofbassPost Number: 9591 Registered: Jun-04 | there is no good idea to this design at all ....take the previous advice and stop letting this person help you he doesnt seem to know anything if hes suggesting this |
|
Gold Member Username: Nd4spd18Northwest PA Post Number: 7732 Registered: Jul-06 | Hahaha that guy is an idiot...... more port AREA is what you want |
|
Gold Member Username: HdubbTeam Revolution Post Number: 3772 Registered: Nov-04 | rounding corners in boxes does help. though it doesn't create velocity it help keeps a good air flow in the box. 3in wide 45 degree pieces in each corner can help the box become a little louder.and also other degree angles in the box caan bring a box to life. but that's more hardcore spl intentions. your friend had the right mindset but a wrong explanation as to why it helps I think |
|
Gold Member Username: HdubbTeam Revolution Post Number: 3773 Registered: Nov-04 | ehh I think I read post wrong he wants you to put it at the end of the port or port corner? no no and end of port lol |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1668 Registered: Dec-03 | well sorry to say but all of you guys are wrong. Velocity is in fact what you want. Improving your port's velocity decreases resistance. Air flow velocity is improved by flaring or rounding edges. |
|
Gold Member Username: SouthernrebelMonroe, Louisiana 2 DD3515s, 2... Post Number: 6448 Registered: Mar-04 | Um...I think this got alil twisted around. Not 100% sure what angle you are looking at this from Zac, but... By constricting port area, the port velocity will increase. This smaller port will restrict the airflow...aka, more air resistance. Now, don't get me wrong. Too big a port can be harmful to sound, but to small a port can also. For instance, another local shop here in town builds their ports FAR too small. I saw them sell a RF T2 12" in a ~2.25cuft box w/ a 3.75"x3.75" port. W/ about 800wrms that port sounded like a dam whistle. |
|
Gold Member Username: InsearchofbassPost Number: 9593 Registered: Jun-04 | yeah this guys design will cause resistance not proper air flow |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1670 Registered: Dec-03 | The design pictured is of course wrong haha. The "velocity" portion of the thread thats being discussed is confusing. I think your speaking of an increase in velocity pressure? Increasing the air velocity without increasing resistance is what we're after, which is why we use flared port ends, to improve the air's velocity. Usable velocity, increasing it is what you want. |
|
Gold Member Username: Van_manBoston South, MA Post Number: 4056 Registered: Mar-06 | so which port would achive higher volocity? port 1 or 2?  |
|
Platinum Member Username: WingmanaliveA pic is worth 1000 posts!! Post Number: 17098 Registered: Jun-06 | Simple physics point to # 1. Higher velocity = port noise. |
|
Silver Member Username: HowtoeatapencilPost Number: 172 Registered: Mar-08 | so just leave the port as a normal port? |
|
Silver Member Username: ExplictxGlen Burnie, Maryland USA Post Number: 635 Registered: Mar-07 | Yeah i would just leave it alone you'll be fine. you can round the edges like said before but you'll be fine with out it. unless your going to all out SPL competing. |
|
Silver Member Username: Yukhui4 15 AA Havocs, Memphis 4kw!! Post Number: 939 Registered: Jan-06 | "dang he seems like he knows alot, would that just make it sound shitty? does it have ANy advantages?" Yeah ...If you like the sound of being in a wind tunnel |
|
Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 4476 Registered: Sep-04 | you guys are getting twisted up between velocity and turbulance. port 2 will have higher velocity and less chance of port noise. you want to achieve maximum velocity and minimal resistance and turbulance. having wedges at the end of the port simulating a flared port CAN help your spl and minimize resistance. I don't know who his friend is and if he's said soemthign dumb in the past but he is right with this.... |
|
Gold Member Username: Van_manBoston South, MA Post Number: 4075 Registered: Mar-06 | so pic 2 would be a better spl burp box design? |
|
Gold Member Username: InsearchofbassPost Number: 9600 Registered: Jun-04 | his friend is saying port 1 is going to improve the port over a standard one but im/we are saying it wont....he didnt mention port 2 according to earl's post but port 2 is being used an example of how a port would work better |
|
Gold Member Username: Van_manBoston South, MA Post Number: 4084 Registered: Mar-06 | this thread has become very confusing. so to recap. port 1 good or no good for spl. port 2 good or no good for spl. |
|
Gold Member Username: InsearchofbassPost Number: 9601 Registered: Jun-04 | anyway its simple port 2 is better than a standard round port and port 1 is a bad idea |
|
Bronze Member Username: SilvermoparNebraska Post Number: 98 Registered: Aug-06 | I agree with sean. lol |
|
Platinum Member Username: WingmanaliveA pic is worth 1000 posts!! Post Number: 17108 Registered: Jun-06 | This thread HAS gotten out of context IMO. Think of it like a funnel. Blow in one end and get a certain velocity out the other. Reverse it and get an entirely different result. Anything causing "turbulence" decreases/disrupts airflow. Airflow(ported designs)=bass. No? |
|
Silver Member Username: Phil_salisburyPost Number: 717 Registered: Sep-06 | WTF, higher velocity of air movement does not translate in improved SPL performance. All Port 1 does is restrict the flow of air which results in back pressure buildup within the port which restricts and more to the point reduces the movement of the cone of the subwoofer. So, that being the case, anyone that thinks port 1 will improve your spl numbers is fuking idiot. |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1671 Registered: Dec-03 | #1 Everybody here agrees pic 1 is retarded. #2 Usable velocity WILL improve your spl performance, call me a fuking idiot all you want. #3 Flared ports will increase usable velocity, decrease resistance, decrease port noise, and improve spl performance. I'm not going to debate this any more haha, its just a fact. The only person on the same page with me here is Trevor. Somehow we're failing to word this properly I guess?...  |
|
Silver Member Username: Phil_salisburyPost Number: 718 Registered: Sep-06 | OK Zac, if you port is such an " amazing " spl improvement, then I guess we'll be seeing it on all the top spl competitors enclosures, when that day happens, you can talk all the smak ya want, till then. Flared Ports vs that other mickey mouse horsesh!t port design is a completely different story and don't even try to think you actually got over on anyone here. |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1672 Registered: Dec-03 | Uhh, well i use them, and I think i have a loud system. and hey?, who the hell are you anyways? |
|
Silver Member Username: Phil_salisburyPost Number: 719 Registered: Sep-06 | You " think " you have loud system. He!!, I can find a number of people that " think " their systems are " LOUD " and they maybe right, but, saying your "LOUD" and proving it is two different things. How " loud " are you ??? 150+, if so, good for you. |
|
Gold Member Username: Naledge503LowDownForum.com Post Number: 3930 Registered: Jun-06 | lol. I believe he did 160.0 in USACi pro stock 0-1000. Zac did you forget about me bro  ? |
|
Gold Member Username: Tatonka-[Team Audible Insanity]- Post Number: 1856 Registered: Mar-07 | Wow, all this trash talking is making Phil look very unprofessional. And yes, Zac Davis is extremely known in USACI with multiple world championships. |
|
Gold Member Username: InsearchofbassPost Number: 9603 Registered: Jun-04 | Zac Davis...."#1 Everybody here agrees pic 1 is retarded. #2 Usable velocity WILL improve your spl performance, call me a fuking idiot all you want. #3 Flared ports will increase usable velocity, decrease resistance, decrease port noise, and improve spl performance. I'm not going to debate this any more haha, its just a fact. The only person on the same page with me here is Trevor. Somehow we're failing to word this properly I guess?...' Ive been following this all along Zac and so have the others initially I think your comment here got things confused.... Zac Davis...."well sorry to say but all of you guys are wrong. Velocity is in fact what you want. Improving your port's velocity decreases resistance. Air flow velocity is improved by flaring or rounding edges." you were focusing on how a port should work with improved quality airflow and without resistance while we were all commenting on the the poor airflow causing resistance/turbulence from this guys port 1 design shared in the beginning of the thread with an image link....Trevor just came in and read the later posts and made his comments because he thought we didnt understand as well Woodlawn Cabinetry - Philster...."WTF, higher velocity of air movement does not translate in improved SPL performance. All Port 1 does is restrict the flow of air which results in back pressure buildup within the port which restricts and more to the point reduces the movement of the cone of the subwoofer. So, that being the case, anyone that thinks port 1 will improve your spl numbers is fuking idiot." Phil's focus was on the poor design idea of port 1 and I think he got upset at the idea that anyone would believe that was a good idea and he proceeded to give his explanation why....I dont think he was calling you an idiot I think he was just calling the idea involved with port 1 and anyone believing it stupid....and we all know you wouldnt recommend port 1 |
|
Silver Member Username: Phil_salisburyPost Number: 720 Registered: Sep-06 | Sean, Exactly, my comments were towards the design of port 1 and the misinformation the OP was lead to believe. I know full well the physic's of aero / flared ports and there effects and I know d@mn well that even when I used round ports I fabricate trim rings for the ends of the port and round them over to achieve ( to a degree ) the same dynamic's of aero/ flared ports. I knew d@mn well I should of said nothing because there's always going to be someone that going to take it out of context and Zac did exactly just that. |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1673 Registered: Dec-03 | I hear ya Sean. Absolutely, pic 1 is a terrible idea. Hmm?...I wonder if the initial person who gave this guy the idea in the first place was meaning for him to put 45 degree angles on the inside of the port at the bends...maybe he misinterpreted it from the get go. But either way, we all agree 1 is a bad idea, no question there...my only deal is this whole velocity thing, and I'm sorry to say to this "woodlawn guy" that I'm right and he is wrong...he can talk all the smack he wants, telling me I need to prove myself, wow, I dont need to prove anything to anyone, I was just trying to be helpful. It isnt very hard to do a search on flared ports to find that improving usable velocity decreases port noise and resistance. This isnt entirely rocket science here, I can't believe something as simple as this has gone on this long. Hey Woodlong Cabinet guy, you said..... quoteOK Zac, if you port is such an " amazing " spl improvement, then I guess we'll be seeing it on all the top spl competitors enclosures, when that day happens, you can talk all the smak ya want, till then. Flared Ports vs that other mickey mouse horsesh!t port design is a completely different story and don't even try to think you actually got over on anyone here. ....uhh? till then?..... quoteYou " think " you have loud system. He!!, I can find a number of people that " think " their systems are " LOUD " and they maybe right, but, saying your "LOUD" and proving it is two different things. How " loud " are you ??? 150+, if so, good for you. haha, ok. I don't normally bust out with a pat on my own back, I hate people who're full of themselves, but since YOU like to talk smack about how I need to prove myself before anything I say is viable...well, here ya go.  ...Naledge, no, I havent forgotten about you. I have the measurements on paper I need to send them to you via email, will do tonight. |
|
Silver Member Username: Phil_salisburyPost Number: 721 Registered: Sep-06 | Zac, Yeah, I know all about your accomplishments, good for you, your a man among many that more than likely have just as many. WTF is your malfunction, don't not understand that I was talking about port design #1 or you just have hard time grasping reading comprehension. |
|
Gold Member Username: ZacdavisBeloit, Wi Post Number: 1674 Registered: Dec-03 | Ahh, I see, you wanna be a smart azz, well read my previous posts. It clearly reads...I stated design 1 was a terrible idea. It was you who chimed in after that stating I had no idea what I was talking about, your the reader with the comprehension deficiency. I don't know you but already don't like you. Your a smart azz and I'm half tempted to call your mediocre box building azz out. What the hell is YOUR malfunction? |
|
Gold Member Username: Safe_crackerChicago, IL US Post Number: 4634 Registered: Jan-06 | If you used a large enough port the flare gains would be minimal, you get more resistance with the port being inside the box lOl. From what I remember a single port closest to the dia of the subwoofer and still able to achieve a desired tune with a realistic length is the goal for maximum radiation of the back wave. Polo. |
|
Gold Member Username: InsearchofbassPost Number: 9606 Registered: Jun-04 | Zac Davis...."Hmm?...I wonder if the initial person who gave this guy the idea in the first place was meaning for him to put 45 degree angles on the inside of the port at the bends...maybe he misinterpreted it from the get go." I wondered if earl misunderstood his friend as well....I hope so |
|
Gold Member Username: SouthernrebelMonroe, Louisiana 2 DD3515s, 2... Post Number: 6456 Registered: Mar-04 |  |
|
Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 4477 Registered: Sep-04 | haha i never even say that picture in the first post until now. I thought it was a broken link so I didn't click it. So to sum it ALL up No, earl, do not do that idea in the picture. putting 45d wedges in port bends can help you (sometimes without them gains spl but with them helps a smoother response). and inversing those wedges in your picture to funnel air into the port rather than out of it is also a helpful idea. Me and Zac were on the same confused page and were right in what we said but it was indirectly on topic. I don't see what anyone is fighting about? |
|
Silver Member Username: HowtoeatapencilPost Number: 173 Registered: Mar-08 | im gunna talk to the guy, maybe he meant do what was in picture 2 |
|
Gold Member Username: Mike11202RE MT 15 VFL 200.1 , Sewell, NJ US Post Number: 1802 Registered: Nov-06 |  |
|
Gold Member Username: InsearchofbassPost Number: 9610 Registered: Jun-04 | "Me and Zac were on the same confused page and were right in what we said but it was indirectly on topic." its cool bud....we all know this was a simple answer and as far as fighting between Zac and Phil im sure both of them can put it behind them because in my opinion it really did start because of a misunderstanding earl...."im gunna talk to the guy, maybe he meant do what was in picture 2" please do and let us know what he says |
|
Gold Member Username: Van_manBoston South, MA Post Number: 4091 Registered: Mar-06 | great debate guys. What a fucked up thread. Edit: As sean stated, And stop having yur friend help you. He doesnt know Zac. google flaired port pics, and you will see they are the oppisite of that pic. Also kerfed ports work well too. |
|
Gold Member Username: Tatonka-[Team Audible Insanity]- Post Number: 1863 Registered: Mar-07 | This is too good of a thread to be sent to the archives  |
|
Gold Member Username: Th3pwn3rI compensate... Post Number: 8306 Registered: Jul-06 | Haha, I missed a good thread. |
|
Gold Member Username: InsearchofbassPost Number: 9764 Registered: Jun-04 | it was a post with a simple answer but got a little confused for a while |
Main Forums
Today's Posts- Home Audio Forum
- Home Video Forum
- Home Theater Forum
- Car Audio Forum
- Accessories Forum
- All Forum Topics