the RSS390HF-4 15" sub ( Parts Express part no 295 468 ) calls for 9 cubic feet in a vented application.
So does anyone have a box design ?
I'm currently considering the Adire Audio Tempest EBS design ( 12 cu ft tuned to 15.8 Hz )
This is using a Dayton Audio SA1000 amp ( and Scott nixon TubeDac2.2 and $450 Dodd Audio preamp up-stream )
....If i go with the Adire EBS design, and use two 4" flared ports.... what overall length do these two ports need to be ?
So does anyone have a box design ?
I'm currently considering the Adire Audio Tempest EBS design ( 12 cu ft tuned to 15.8 Hz )
This is using a Dayton Audio SA1000 amp ( and Scott nixon TubeDac2.2 and $450 Dodd Audio preamp up-stream )
....If i go with the Adire EBS design, and use two 4" flared ports.... what overall length do these two ports need to be ?
between 20 1/2" and 21" assuming both sides flared
a 1.5" x 8" rectangular port could also be used @ 21 - 22"
a 1.5" x 8" rectangular port could also be used @ 21 - 22"
Hi,
(something doesn't add up)
A 12cf or 340L@15.8 Hz is giving me a double port of 10.2cmx47.56cm (dxl) or 18.7", with port surface 163.43 cm2.
What's distance between ports?
I'm using driver above.
(something doesn't add up)
A 12cf or 340L@15.8 Hz is giving me a double port of 10.2cmx47.56cm (dxl) or 18.7", with port surface 163.43 cm2.
What's distance between ports?
I'm using driver above.
It's something ok to have different numbers. I'm also using distance between CtC between ports. This because of different software and parameters ie temperature, altitude, humidity.
I (software) was not considering the flares, better I was considering one side flares. Not both ends of the port.
I (software) was not considering the flares, better I was considering one side flares. Not both ends of the port.
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Inductor,
Both sides of the port should be flared.... i think.
So you're simming the RSS390HF-4 in a 340L vented box....
This is very valuable information for me. ( the RSS390HF-4 is the only other sub i'd put in the box i'm currently having built )
So.... you're getting overall port lengths of 18.7"
For your question, what is the distance between the ports....
here's the Design
http://www.stiger.com/subtable/ventedtempest.pdf
Click on the Link Above
I hope this discussion continues. .....because if we're talking about the RSS390HF-4 in the Adire Audio Tempest EBS vented enclosure..... it doesn't get much cooler than that.
So Inductor, for your 18.7" overall length, Is this two 4" ports ? Is this flared ends on both sides ? If not, what overall length do you get with flared ends on both sides ?
I've also heard that one 6" port is good. Some say even better than two 4" ports. But this single 6" port needs to be about 25" long ! ..so forget that. i'll stick with the two 4" port design.
In a 53cm x 53cm x 106cm ported box ( 21" x 21" x42" ) a single 6" port that is 25" long, gives a tuning frequency of about 17 Hz ....i'm assuming these dimensions are internal net volume (and not the external dimensions of the enclosure ).
I emailed the Parts Express Tech Dept. They said that two 4" ports need to have an 18 7/8" overall ( including flared ends on both sides ) length to acheive 15.8 Hz in a 340L vented enclosure ( using the Dayton DVC385-88 15" subwoofer ).
I'm using the Dayton DVC385-88 ....but would like to also get the Dayton RSS390HF-4 sometime in the future. But then i also remember, that i won't be playing this at any extreme high levels. So may never decide to spend the money on the RSS390HF-4
Both sides of the port should be flared.... i think.
So you're simming the RSS390HF-4 in a 340L vented box....
This is very valuable information for me. ( the RSS390HF-4 is the only other sub i'd put in the box i'm currently having built )
So.... you're getting overall port lengths of 18.7"
For your question, what is the distance between the ports....
here's the Design
http://www.stiger.com/subtable/ventedtempest.pdf
Click on the Link Above
I hope this discussion continues. .....because if we're talking about the RSS390HF-4 in the Adire Audio Tempest EBS vented enclosure..... it doesn't get much cooler than that.
So Inductor, for your 18.7" overall length, Is this two 4" ports ? Is this flared ends on both sides ? If not, what overall length do you get with flared ends on both sides ?
I've also heard that one 6" port is good. Some say even better than two 4" ports. But this single 6" port needs to be about 25" long ! ..so forget that. i'll stick with the two 4" port design.
In a 53cm x 53cm x 106cm ported box ( 21" x 21" x42" ) a single 6" port that is 25" long, gives a tuning frequency of about 17 Hz ....i'm assuming these dimensions are internal net volume (and not the external dimensions of the enclosure ).
I emailed the Parts Express Tech Dept. They said that two 4" ports need to have an 18 7/8" overall ( including flared ends on both sides ) length to acheive 15.8 Hz in a 340L vented enclosure ( using the Dayton DVC385-88 15" subwoofer ).
I'm using the Dayton DVC385-88 ....but would like to also get the Dayton RSS390HF-4 sometime in the future. But then i also remember, that i won't be playing this at any extreme high levels. So may never decide to spend the money on the RSS390HF-4
Snappyturtle,
Appreciate that information very much.
So the Dayton RSS390HF-4 15" sub in the Adire Audio Tempest EBS vented enclosure, would require the two 4" vent ports to be 20.5 - 21" in overall length. ( It's unfortunate that the Parts Express part no 268 552 is only 17" overall length ) ( 2.5" for each flared end and 12" long tube )
And the Dayton DVC385-88 15" sub (which not many people are going to care about since it's now unavailable ) in the Tempest EBS vented enclosure, will require the two 4" vent ports to be 18 7/8" in overall length.
Was wondering if that slot port information was ever gonna be posted. much appreciated
Would the slot port using the DVC385-88 ( in the Tempest EBS vented enclosure ) be any different ?
Appreciate that information very much.
So the Dayton RSS390HF-4 15" sub in the Adire Audio Tempest EBS vented enclosure, would require the two 4" vent ports to be 20.5 - 21" in overall length. ( It's unfortunate that the Parts Express part no 268 552 is only 17" overall length ) ( 2.5" for each flared end and 12" long tube )
And the Dayton DVC385-88 15" sub (which not many people are going to care about since it's now unavailable ) in the Tempest EBS vented enclosure, will require the two 4" vent ports to be 18 7/8" in overall length.
Was wondering if that slot port information was ever gonna be posted. much appreciated
Would the slot port using the DVC385-88 ( in the Tempest EBS vented enclosure ) be any different ?
Adire Audio Tempest EBS design
Hi,
Let's take into consideration (to calibrate) the project linked by you to post #5.😀
ADIRE AUDIO TEMPEST DVC 15"
Here we go:
Distace between ports 12.5"= 31.75cm (CtC)
EBS Design - 340L cabinet, tuned to 15.8 Hz (pics below)
Internal volume of the ""net 340L cabinet""
42.5"x22.5"x22.5" or 107.95cmx57.15cmx57.15cm
12.451 cubic feet or 352.58 liters
Ports 2x 4in= 10.16cm flared
SBB4 Design - 194L cabinet, tuned to 18.8 Hz
Internal volume of the ""net 194L cabinet""
24.75"x22.5"x22.5" or 62.865cmx57.15cmx57.15cm
7.251 cubic feet or 205.32 liters
Ports 2x 3in= 7.62cm flared
Adire Alignment Design - 214L cabinet, tuned to 15.4 Hz
Internal volume of the ""net 194L cabinet""
32"x20.5"x20.5" or 62.865cmx57.15cmx57.15cm
7.7824 cubic feet or 220.37 liters
Ports 2x 3in= 7.62cm flared
Hi,
Let's take into consideration (to calibrate) the project linked by you to post #5.😀
ADIRE AUDIO TEMPEST DVC 15"
Here we go:
- EBS Design
- SBB4 Design
- Adire Alignment Design
Distace between ports 12.5"= 31.75cm (CtC)
EBS Design - 340L cabinet, tuned to 15.8 Hz (pics below)
Internal volume of the ""net 340L cabinet""
42.5"x22.5"x22.5" or 107.95cmx57.15cmx57.15cm
12.451 cubic feet or 352.58 liters
Ports 2x 4in= 10.16cm flared
SBB4 Design - 194L cabinet, tuned to 18.8 Hz
Internal volume of the ""net 194L cabinet""
24.75"x22.5"x22.5" or 62.865cmx57.15cmx57.15cm
7.251 cubic feet or 205.32 liters
Ports 2x 3in= 7.62cm flared
Adire Alignment Design - 214L cabinet, tuned to 15.4 Hz
Internal volume of the ""net 194L cabinet""
32"x20.5"x20.5" or 62.865cmx57.15cmx57.15cm
7.7824 cubic feet or 220.37 liters
Ports 2x 3in= 7.62cm flared
Attachments
Now for new driver linked in the title
DAYTON RSS390HF-4 (v2015)
For the same EBS design (similar alignment) we have a reflex cabinet that is anything between ~240L and 340L and same tuning, in this case VB = 340.0 L, FB = 15.8 Hz.
So we have below in ff (not in room) Dayton F3 15 Hz, F6 13.5 Hz vs Adire F3 18 Hz, F6 14.5 Hz.
Ports flared to one side (0.846 - Joerg Panzer/Akabak).
2x 4in= 10.16cm and length 47.32cm= 18 5⁄8in
Ports flared to both sides (0.677 "JP" or 0.652 ref.).
2x 4in= 10.16cm and length 49.29cm= 19 13⁄32in or 49.58cm= 19 33⁄64in
I would assume anything between the 19" - 22" from post #2.
(two 4" ports, flared ends on both sides)
Surfaces S of (2x4") ports: 162.15 cm2
Surfaces S of (1x6") ports: 182.41 cm2 - in the case you ask for a 6":
1 Port 6in= 15.24cm and length 52.88cm= 20 13⁄16in (0.846)
1 Port 6in= 15.24cm and length 55.17cm= 21 23⁄32in (0.677)
1 Port 6in= 15.24cm and length 55.5cm= 21 27⁄32in (0.652)
At high levels (600/700W) for a new driver/speaker I would consider a 3 port format with the 4" ports (diam) and larger surface area (243.22 cm2) and 76.67cm= 30in (L) long (0.846).
DAYTON RSS390HF-4 (v2015)
For the same EBS design (similar alignment) we have a reflex cabinet that is anything between ~240L and 340L and same tuning, in this case VB = 340.0 L, FB = 15.8 Hz.
So we have below in ff (not in room) Dayton F3 15 Hz, F6 13.5 Hz vs Adire F3 18 Hz, F6 14.5 Hz.
Ports flared to one side (0.846 - Joerg Panzer/Akabak).
2x 4in= 10.16cm and length 47.32cm= 18 5⁄8in
Ports flared to both sides (0.677 "JP" or 0.652 ref.).
2x 4in= 10.16cm and length 49.29cm= 19 13⁄32in or 49.58cm= 19 33⁄64in
I would assume anything between the 19" - 22" from post #2.
(two 4" ports, flared ends on both sides)
Surfaces S of (2x4") ports: 162.15 cm2
Surfaces S of (1x6") ports: 182.41 cm2 - in the case you ask for a 6":
1 Port 6in= 15.24cm and length 52.88cm= 20 13⁄16in (0.846)
1 Port 6in= 15.24cm and length 55.17cm= 21 23⁄32in (0.677)
1 Port 6in= 15.24cm and length 55.5cm= 21 27⁄32in (0.652)
At high levels (600/700W) for a new driver/speaker I would consider a 3 port format with the 4" ports (diam) and larger surface area (243.22 cm2) and 76.67cm= 30in (L) long (0.846).
Attachments
Inductor,
Regarding your last post that is about the Dayton DVC385-88..
I see you get really about 19 1/2" ....for the overall length of the two ports.
Parts Express Tech Dept had told me the following -
Hello,
To reach that tuning the ports would need to be 18-7/8 each
Regards,
Chris Frechette
Technical Advisor
Parts Express
....that was with the DVC385-88
So pretty close !
I really think i'm just going to use the Parts Express part no 268 352 ports at their full overall length, which is 17"
..i'm pretty sure that will give a tuning frequency of 17 Hz ( and not 15.8 Hz
That's ok right ( 17 Hz instead of 15.8 Hz ) ?
Really appreciate how you did the Adire Audio Tempest
And also the Dayton RSS390HF-4
Some people say that a single 6" port that is 25" long.. can be done instead of the two 4" ports at 19.5" long. Looks like you get 21.5" or so for the length. Glad you included doing a single 6" port.
I'm going to stick with the two 4" ports.
Then also a slot port could be done.
I don't know what the dimensions for the DVC385-88 would be
Snappyturtle said that if using the Dayton RSS390HF-4 ..then 1.5" tall, 8" wide and 21 to 22" long could be done. Is there any advantage to doing a slot port ?
Me and my neighbor have started the build, Here's some pics
Regarding your last post that is about the Dayton DVC385-88..
I see you get really about 19 1/2" ....for the overall length of the two ports.
Parts Express Tech Dept had told me the following -
Hello,
To reach that tuning the ports would need to be 18-7/8 each
Regards,
Chris Frechette
Technical Advisor
Parts Express
....that was with the DVC385-88
So pretty close !
I really think i'm just going to use the Parts Express part no 268 352 ports at their full overall length, which is 17"
..i'm pretty sure that will give a tuning frequency of 17 Hz ( and not 15.8 Hz
That's ok right ( 17 Hz instead of 15.8 Hz ) ?
Really appreciate how you did the Adire Audio Tempest
And also the Dayton RSS390HF-4
Some people say that a single 6" port that is 25" long.. can be done instead of the two 4" ports at 19.5" long. Looks like you get 21.5" or so for the length. Glad you included doing a single 6" port.
I'm going to stick with the two 4" ports.
Then also a slot port could be done.
I don't know what the dimensions for the DVC385-88 would be
Snappyturtle said that if using the Dayton RSS390HF-4 ..then 1.5" tall, 8" wide and 21 to 22" long could be done. Is there any advantage to doing a slot port ?
Me and my neighbor have started the build, Here's some pics
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For a slot port I would go with the same area as the 2x4" ports or above. The obvious answer for this (slot instead of tubes) is strength. Others will give you better answers than this. Pay attention that larger ports area (or diam.) the longer they need to be for the same frquency. The 17" length ports (tuning) should be the practical choice altough in the limit for the right EBS alignment.
Snappyturtle,
I was just told in the Parts Express Tech Talk Forum that the mouth of the slot port would have to be the same area as the two 4" ports combined, or about 25 square inches. Then the same 17" length ( for the slot port ) could be used to get 17Hz ....Or i could add the 2" to get a length of 19" ....and acheive the 15.8Hz
So a slot port mouth of 2" x 12.5" would equal 25"
You had said 1.5" x 8" ..How'd you get that ? that only gives an sq in area (for the mouth ) of 12" !
This box ( for the Dayton DVC385-88 ) will have the two 4" flared tubular ports.
But thinking about doing a second enclosure with a slot port ....For the Dayton RSS390HF-4
A slot port 2" tall, 12.5" wide and 21" long. ....to acheive 15.8Hz for that sub ( RSS390HF-4 )
Here's me and the EBS Box
A side view
Far away view
I was just told in the Parts Express Tech Talk Forum that the mouth of the slot port would have to be the same area as the two 4" ports combined, or about 25 square inches. Then the same 17" length ( for the slot port ) could be used to get 17Hz ....Or i could add the 2" to get a length of 19" ....and acheive the 15.8Hz
So a slot port mouth of 2" x 12.5" would equal 25"
You had said 1.5" x 8" ..How'd you get that ? that only gives an sq in area (for the mouth ) of 12" !
This box ( for the Dayton DVC385-88 ) will have the two 4" flared tubular ports.
But thinking about doing a second enclosure with a slot port ....For the Dayton RSS390HF-4
A slot port 2" tall, 12.5" wide and 21" long. ....to acheive 15.8Hz for that sub ( RSS390HF-4 )
Here's me and the EBS Box
A side view
Far away view
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Inductor,
So for the two 4" flared ports you got 163.43cm as a port surface.......
163cm2 is the same as 25 square inches, right ?
i did 163 divided by 2.54 and divided a second time by 2.54
( 2.54cm is 1 inch
I wander why Snappyturtle is telling me to build a slot port mouth that has about half this area 😱 🙁
sorry to be late to the party here. in my error the port number for 1.5 x 8 at 21 1/4 is actually 2. and again assuming flared ports. the 1/4" is negligible as with slot ports this size theyll likely be on a side wall and need end correction anyways.
i saw your post(s) over at PE, you can creep up tuning fine and it not matter significantly. (1) 2x18 @ 26 1/2 (flush ends) nets 17hz-ish tuning in 12 cu ft.
if your goal is to add a second box here, id imagine aesthetics plays a role and would just create a second box of what youve already done, and it would eliminate any slight irregularities between slot ports and round ports, their inherent resonances at long lengths etc. (this gets right down into how panels vibrate based on construction methods)
Hi!
I have the Dayton Audio RSS 390HF-4 Drivers and wonder if the EBS alignment and Port size will remain valid for a Cabinet with Internal Dimensions of 18" x 24" x 60" ( 340 L Volume ) ?
Jayant
Volume Calculator
A box shape that has dimensions 18 inches by 24 inches by 60 inches has a volume of:
= 15 cubic feet = 424.75 liters
So, plenty of space I guess for your project. (considering the "minimal" volume to add for parts, ports and drivers)
A box shape that has dimensions 18 inches by 24 inches by 60 inches has a volume of:
= 15 cubic feet = 424.75 liters
So, plenty of space I guess for your project. (considering the "minimal" volume to add for parts, ports and drivers)
Hi Inductor,
Many Thanks !
So an enclosure of 18" x 24" x 60" with 2 Nos. Flared Ports of 4" Dia x 19" Length should conform to EBS alignment ?
Jayant
Last year, I build this HO design for a friend. It's about the most compact ported design for this driver that I can recommend that works well. Tuned to about 25 Hz in real life with a little bit of "bump" built in.
Look at the reviews and scroll down to the review by FireCloud
Dayton Audio RSS390HO-4 15" Reference HO Subwoofer 4 Ohm
The only thing I would caution is that the mounting flange for this driver is a bit narrow so glue some solid oak pieces for the screws to bit in (don't mess with T-nuts etc for this driver as the flange is too narrow).
Lastly, I found that one flared port will suffice for normal purposes. No need to double up unless you intend to play very loud for long periods.
IIRC, I used a 500 w yung class D amp with no boost externally (though you could arguably fit one into the cabinet if you extend the depth by an inch or so.
Look at the reviews and scroll down to the review by FireCloud
Dayton Audio RSS390HO-4 15" Reference HO Subwoofer 4 Ohm
The only thing I would caution is that the mounting flange for this driver is a bit narrow so glue some solid oak pieces for the screws to bit in (don't mess with T-nuts etc for this driver as the flange is too narrow).
Lastly, I found that one flared port will suffice for normal purposes. No need to double up unless you intend to play very loud for long periods.
IIRC, I used a 500 w yung class D amp with no boost externally (though you could arguably fit one into the cabinet if you extend the depth by an inch or so.
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to call your attention to the difference between drivers that are being published in this thread. You mention the 15" Dayton RSS390HO-4 - Status
- Not open for further replies.