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View Full Version : Aeroport Fire Position



bgowdy31
02-20-2012, 08:55 AM
I just got my new enclosure in. i Have 2 6" aeros. im just curious, which way worked better for you
guys as far as SPL goes. i currently have them firing externally. but i would like some input
or opinions.

thanks in advance

bgowdy31
02-20-2012, 09:27 AM
BUMP......... anyone?

bgowdy31
02-20-2012, 11:20 PM
Bump for opinions

Mitch86
02-20-2012, 11:29 PM
What exactly are you asking? Do you want to know if internal port or external are better? Or are you asking which direction to fire the ports? Your post is kind of confusing...

bgowdy31
02-23-2012, 12:33 AM
As far as better TL numberz go. Does internal or external do better

arctictwist
02-24-2012, 01:31 AM
I think your post is confusing people because you ask direction in the topic and then actual type in your post. Internal and external are not a direction. they are two different types.

bgowdy31
08-08-2012, 03:53 PM
bump for input.

bgowdy31
08-08-2012, 03:55 PM
note the spl scores in my sig for the 95 blazer are the aero ports mounted internally in the box. ive read and around it seems the for spl mounting the aero's externally tend to do better....

kushy_dreams
08-08-2012, 04:01 PM
I am a firm believer in putting a V behind the mouth of the port on the inside of the box when you mount them internally. A local shop that has a bunch of MECA world titles introduced me to the idea and they swear by it and only used round ports for their builds. If you saw the number of trophies they have sitting around the shop is very convincing that they know what they are doing.

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874069_medium.jpg

Leave the opening no less than half the width of the port. In the pic above the gap from the V to port tube is 4 1/4inches with 6inch pvc

Ronny
08-08-2012, 04:03 PM
Simply for numbers why not simply just TRY external in your build? Our hobby is interesting... You must go and test test test.

BTW - If you have the room, go external and point the port(s) into the opposite corner of the meter too.

Ronny
08-08-2012, 04:08 PM
I am a firm believer in putting a V behind the mouth of the port on the inside of the box when you mount them internally. A local shop that has a bunch of MECA world titles introduced me to the idea and they swear by it and only used round ports for their builds. If you saw the number of trophies they have sitting around the shop is very convincing that they know what they are doing.

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874069_medium.jpg

Leave the opening no less than half the width of the port. In the pic above the gap from the V to port tube is 4 1/4inches with 6inch pvc


Interesting. Even for round ports you've had great luck with the corner build up like that. Hmm, perhaps I'll try it out too. Removable at first, and I'll test SPL scores while at it. It definitely helped with centered full height slot ports, but I'm excited to see what it does for round/round flared ports as well.

BTW - What are the specs on that enclosure (sticky icky) Kushy_Dreams? Also, dual 12" drivers with single 6" port?

VWGolfMKVI
08-08-2012, 04:08 PM
The reason you see alot of external ports is to keep the box rise down. Smaller enclosures will have a lower rise than larger enclosures. So for better numbers its best to have a smaller enclosure with a large external port for TL numbers.

RangerDangerV2
08-08-2012, 04:09 PM
experimentation is key when chasing numbers. remember to only change one variable at a time.

bgowdy31
08-08-2012, 04:09 PM
Simply for numbers why not simply just TRY external in your build? Our hobby is interesting... You must go and test test test.

BTW - If you have the room, go external and point the port(s) into the opposite corner of the meter too.

yea i know about were to fire them. mine are on drivers side so i meter on the passenger side. im just curious if externally really works better numbers wise. im at work so i cant test right now so i thought i would bump this up

bgowdy31
08-08-2012, 04:11 PM
I am a firm believer in putting a V behind the mouth of the port on the inside of the box when you mount them internally. A local shop that has a bunch of MECA world titles introduced me to the idea and they swear by it and only used round ports for their builds. If you saw the number of trophies they have sitting around the shop is very convincing that they know what they are doing.

http://carphotos.cardomain.com/ride_images/3/109/1749/25270874069_medium.jpg

Leave the opening no less than half the width of the port. In the pic above the gap from the V to port tube is 4 1/4inches with 6inch pvc


??? not sure what you mean with the V. im at work so if theres a pic i cant see it right now

bgowdy31
08-08-2012, 04:20 PM
experimentation is key when chasing numbers. remember to only change one variable at a time.

i know this. i was just asking opinions. i am going to re mount them and test but i have to shrink my box so i have to stuff it with something to bring size down a bit

kushy_dreams
08-08-2012, 04:22 PM
Interesting. Even for round ports you've had great luck with the corner build up like that. Hmm, perhaps I'll try it out too. Removable at first, and I'll test SPL scores while at it. It definitely helped with centered full height slot ports, but I'm excited to see what it does for round/round flared ports as well.

BTW - What are the specs on that enclosure (sticky icky) Kushy_Dreams? Also, dual 12" drivers with single 6" port?

What do you mean by corner build up? The pressure should all be focused towards the rear center and out the port.

Specs are 4 cu/ft (after all displacements are subtracted), 6inch pvc thats 14.5long on the inside which gives a tune of 31hz. 2 12 drivers.

I have ran 2 sets of woofers in that box, Boston G5 12s and Boston G1 12s

On my spl lab in my Ford Contour I pulled:

with the G5's on a Rockford Punch 1000 @ 1ohm (1400rms before rise)
142.5db sealed on the dash at 49hz (test tone)
141.18 at the headrest at 43hz (music)
135.3 at the headrest at 26hz (music)

with the G1's on a Rockford Punch 1000 @ 2 ohms (934rms before rise)
139.0 sealed on the dash on music @ 43hz
132.0 sealed on the dash on music @26hz

put the G1s in my buddy's Mazdaspeed 6 with a MTX 1501d at 2 ohms (1500rms before rise)
140.08@ the headrest at 43hz on music
132.2 @ the headrest at 26hz on music
138.xx @ the headrest on tones all the way up to 65hz

All the music scores were done with the same song, a slowed version of white girl with bass lines of 26hz and 43hz

For comparison sake, we could not pull a 140db from a pair of Diamond D6 12s wired to 2 ohms on the MTX amp and they were in a box thats roughly 1.5-1.7 cu/ft per side tuned in the upper 30s and it was a smaller box so there was much more airflow around it. We managed a best of 139.6 on music at the hreadrest with the d6's.

Thats a lot of specifics to read, but the end result is the box is super efficient, hence the $50/ea G1's getting louder than the D6's which cost 6x more.

One last tidbit of info, the box that the d6's were in was built by the same shop I referenced in my first post, it had a double baffle, 45s in the corners and the V behind 2 4inch aeros, it was not a crappy box, maybe not optimal for the d6's, but a well designed box nonetheless.

kushy_dreams
08-08-2012, 04:23 PM
??? not sure what you mean with the V. im at work so if theres a pic i cant see it right now

yep theres a pic

RangerDangerV2
08-08-2012, 04:24 PM
i know this. i was just asking opinions. i am going to re mount them and test but i have to shrink my box so i have to stuff it with something to bring size down a bit

so if you know.. why would you bother to ask the question?

Ronny
08-08-2012, 04:26 PM
Well, in that case, just go and test mang. Once you are off work or have some free time do it to it. VWGolf explained why external helps, and why it especially helps with smaller enclosures.

Kushy_Dreams did post a photo. It is in regards to placing an outside corner or V inside the enclosure where the inside port opening is. If you have a woofer/port orientation that does not support a centered port then it won't apply. But you can always rebuild :D

I see your Fo is 50Hz. Really in that case, why not just rebuild for a full-on fartbox? If you have enough height available (window line rules or not?) or just place the driver and port on the same plane whether centered above or below, or off to the side towards a corner perhaps; fire them into the corner and find what your new best burping frequency is. Also, for such a high Fo, you do not need 7.1 cubes. Why not build ~6 cubes net and leave it to where you can take up volume as well for testing, and utilize a round port so you can take away length as well.... You know, this hobby is all about intense amounts of testing.

Ronny
08-08-2012, 04:38 PM
Great. Sounds good.
I call it an outside corner, you call it a V. I didn't mean anything truly being built up in one of the corners of the enclosure. I guess it's the fenestration specialist in me that HAD to call a V an outside corner instead :p


No kidding! Cheaper elementary woofers essentially, on such power and being able to pull that off on the SPL-Labs. Fantastic. Were all of these scores sealed up?

I'll be doing some relatively involved testing with these centered outside corners and round ports I think. I/we did some testing with the outside corners in walls with centered ports that were full height slot ports, I'll have to post them with the entire thread that I'll make. I better hurry though, seeing as how school is just around the corner :crap:

Thanks! :D



What do you mean by corner build up? The pressure should all be focused towards the rear center and out the port.

Specs are 4 cu/ft (after all displacements are subtracted), 6inch pvc thats 14.5long on the inside which gives a tune of 31hz. 2 12 drivers.

I have ran 2 sets of woofers in that box, Boston G5 12s and Boston G1 12s

On my spl lab in my Ford Contour I pulled:

with the G5's on a Rockford Punch 1000 @ 1ohm (1400rms before rise)
142.5db sealed on the dash at 49hz (test tone)
141.18 at the headrest at 43hz (music)
135.3 at the headrest at 26hz (music)

with the G1's on a Rockford Punch 1000 @ ohms (934rms before rise)
139.0 sealed on the dash on music @ 43hz
132.0 sealed on the dash on music @26hz

put the G1s in my buddy's Mazdaspeed 6 with a MTX 1501d at 2 ohms (1500rms before rise)
140.08@ the headrest at 43hz on music
132.2 @ the headrest at 26hz on music
138.xx @ the headrest on tones all the way up to 65hz

All the music scores were done with the same song, a slowed version of white girl with bass lines of 26hz and 43hz

For comparison sake, we could not pull a 140db from a pair of Diamond D6 12s wired to 2 ohms on the MTX amp and they were in a box thats roughly 1.5-1.7 cu/ft per side tuned in the upper 30s and it was a smaller box so there was much more airflow around it. We managed a best of 139.6 on music at the hreadrest with the d6's.

Thats a lot of specifics to read, but the end result is the box is super efficient, hence the $50/ea G1's getting louder than the D6's which cost 6x more.

bgowdy31
08-08-2012, 04:42 PM
so if you know.. why would you bother to ask the question?

nevermind dude. i was saying i know the test test test stuff. IM AT WORK, so i cant test. I was simply asking for input. in other words peoples exp with external vs internal.

bgowdy31
08-08-2012, 04:48 PM
Well, in that case, just go and test mang. Once you are off work or have some free time do it to it. VWGolf explained why external helps, and why it especially helps with smaller enclosures.

Kushy_Dreams did post a photo. It is in regards to placing an outside corner or V inside the enclosure where the inside port opening is. If you have a woofer/port orientation that does not support a centered port then it won't apply. But you can always rebuild :D

I see your Fo is 50Hz. Really in that case, why not just rebuild for a full-on fartbox? If you have enough height available (window line rules or not?) or just place the driver and port on the same plane whether centered above or below, or off to the side towards a corner perhaps; fire them into the corner and find what your new best burping frequency is. Also, for such a high Fo, you do not need 7.1 cubes. Why not build ~6 cubes net and leave it to where you can take up volume as well for testing, and utilize a round port so you can take away length as well.... You know, this hobby is all about intense amounts of testing.

i dont burp i compete on music average.... the box after all dis place is prolby around 6.7 or .8 cubes honestly, its been tested my score decreased when i went under 6.7. AQ like larger box.

kushy_dreams
08-08-2012, 04:49 PM
Great. Sounds good.
I call it an outside corner, you call it a V. I didn't mean anything truly being built up in one of the corners of the enclosure. I guess it's the fenestration specialist in me that HAD to call a V an outside corner instead :p


No kidding! Cheaper elementary woofers essentially, on such power and being able to pull that off on the SPL-Labs. Fantastic. Were all of these scores sealed up?

I'll be doing some relatively involved testing with these centered outside corners and round ports I think. I/we did some testing with the outside corners in walls with centered ports that were full height slot ports, I'll have to post them with the entire thread that I'll make. I better hurry though, seeing as how school is just around the corner :crap:

Thanks! :D

some scores were sealed, some were at the headrest like where MECA meters at. I listed where the meter was for each score that was posted.

Ronny
08-08-2012, 05:07 PM
i dont burp i compete on music average.... the box after all dis place is prolby around 6.7 or .8 cubes honestly, its been tested my score decreased when i went under 6.7. AQ like larger box.

You compete on music with a 50Hz Fo? If that is your daily enclosure then you might as well build a burp box for 50Hz but play some music that will keep you right there in the lanes.
Shrink her way down, tons of port, and try to utilize coupling the best you can with corner loading/firing the port(s) or woofer. I have quite a bit of experience with AQ... Err, SQ, lol. And I was able to produce fantastic numbers with burping them in smaller enclosures and lots of port. That is just a start of course, I'm pretty sure most will state that you want to start with lower volume in the enclosure, and lots of port.


Although many, including myself, have seen the opposite work very well, it certainly is all specific to each and every build.

bgowdy31
08-08-2012, 06:17 PM
You compete on music with a 50Hz Fo? If that is your daily enclosure then you might as well build a burp box for 50Hz but play some music that will keep you right there in the lanes.
Shrink her way down, tons of port, and try to utilize coupling the best you can with corner loading/firing the port(s) or woofer. I have quite a bit of experience with AQ... Err, SQ, lol. And I was able to produce fantastic numbers with burping them in smaller enclosures and lots of port. That is just a start of course, I'm pretty sure most will state that you want to start with lower volume in the enclosure, and lots of port.


Although many, including myself, have seen the opposite work very well, it certainly is all specific to each and every build.

its 50 hz because my trucks res freq is around there. it peaks at 50 but plays pretty well all the way down to about 35hz, i dont listen to anything really below that anyway.

bgowdy31
08-08-2012, 06:18 PM
You compete on music with a 50Hz Fo? If that is your daily enclosure then you might as well build a burp box for 50Hz but play some music that will keep you right there in the lanes.
Shrink her way down, tons of port, and try to utilize coupling the best you can with corner loading/firing the port(s) or woofer. I have quite a bit of experience with AQ... Err, SQ, lol. And I was able to produce fantastic numbers with burping them in smaller enclosures and lots of port. That is just a start of course, I'm pretty sure most will state that you want to start with lower volume in the enclosure, and lots of port.


Although many, including myself, have seen the opposite work very well, it certainly is all specific to each and every build.

also the way it is right now its pretty musical for my taste. so i dont want a burp box

RangerDangerV2
08-08-2012, 06:23 PM
also the way it is right now its pretty musical for my taste. so i dont want a burp box

tuned to 50hz is a music box??

bgowdy31
08-08-2012, 06:28 PM
tuned to 50hz is a music box??

thats just the way it came out. im content with it. i dont listen to nothing below 35hz and it plays down to that pretty well

RangerDangerV2
08-08-2012, 06:32 PM
thats just the way it came out. im content with it. i dont listen to nothing below 35hz and it plays down to that pretty well

so let me get this straight... you design a box add some ports and just run it how it comes out? that will almost always end in failure...

bgowdy31
08-08-2012, 06:36 PM
so let me get this straight... you design a box add some ports and just run it how it comes out? that will almost always end in failure...

no it was designed to come out at 47hz. but i came to 50. whoa a whole 3hz difference, and it hasnt failed yet........