Hello folks,
This in my first post so be kind with me and my bad english as it is not my native language. This is my first audio project and I did sone research about TL enclosures.
Long story short: I plan to build a suboofer using Dayton SD270A-88 in a transmission line enclosure for deep and tight bass. The sub will be used for music to complete the spectrum of my two bookshelfs wich lack the low octaves.
The thing is I have no ideea how will it sound since I tried to use Hornresp but I don't know what all those parameters are. If someone have 5 min to spare and simulate that for me I'd be very happy.
The line is 2.8 m, cross section is a bit tapered from 375 sq/cm to 340 sq/cm.
It will be filled with wool acording to the best sound.
So what do you think?
This in my first post so be kind with me and my bad english as it is not my native language. This is my first audio project and I did sone research about TL enclosures.
Long story short: I plan to build a suboofer using Dayton SD270A-88 in a transmission line enclosure for deep and tight bass. The sub will be used for music to complete the spectrum of my two bookshelfs wich lack the low octaves.
The thing is I have no ideea how will it sound since I tried to use Hornresp but I don't know what all those parameters are. If someone have 5 min to spare and simulate that for me I'd be very happy.
The line is 2.8 m, cross section is a bit tapered from 375 sq/cm to 340 sq/cm.
It will be filled with wool acording to the best sound.
So what do you think?
Attachments
Hi,
I think tour TL-line have an adequate length and total volume but :See the first of rows in the submitted picture then compare with the other suggestions where more BW is traded from SPL and to a smoother in-band phase/gldy.
If you fill your design with damping material: The BW will decrease further with a slope starting ~at 60 Hz, thus moving f3 above to 40 – 50 Hz.
b🙂
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Thank you so much for your response, very useful info.
The second graph in your photo looks a lot better than mine, good spl/f3 compromise. I redesigned my line but kept the outer panels same size since they are already cut. I hope this will generate a better response than the first one. I had to cut 20 cm of the line sice it became to long.
What do u think?
The second graph in your photo looks a lot better than mine, good spl/f3 compromise. I redesigned my line but kept the outer panels same size since they are already cut. I hope this will generate a better response than the first one. I had to cut 20 cm of the line sice it became to long.
What do u think?
Attachments
Hello,
If u mean HornResp I'd like to but I can't make it work properly on my pc. Can u model it for me pls?
Thank you.
If u mean HornResp I'd like to but I can't make it work properly on my pc. Can u model it for me pls?
Thank you.
Hi,
Yes I can but you have to provide data exactly like I asked for in this thread:..read:
http://www.diyaudio.com/forums/subwoofers/205299-sofa-subwoofer-3.html#post2927231
What's required at least is a complete list of data like:'subdata.png' in post#32:
http://www.diyaudio.com/forums/subwoofers/205299-sofa-subwoofer-4.html#post2928573
I don't like guesswork, that is: collecting data from a picture where I have to do reverse engineering and spend a lot of time doing guesswork.
b🙂
Hey if bjorno doesn't have time I'll do some horn resping (yep its a verb) later tonight and see if any minor tweeks could help
Thank you,
My room is 7m X 3m X 2.8m if that counts.
I can't wait to start the assembly tommorow if I have a good feedback from you.
I'll get the driver in a week or so, till then i want to finish the enclosure and the amp.
What crossover u suggest I shoul use? Full range monitors and cross only the sub or cross the signal betwen the sub and speakers to release the monitors from bass, maybe they play better.
My room is 7m X 3m X 2.8m if that counts.
I can't wait to start the assembly tommorow if I have a good feedback from you.
I'll get the driver in a week or so, till then i want to finish the enclosure and the amp.
What crossover u suggest I shoul use? Full range monitors and cross only the sub or cross the signal betwen the sub and speakers to release the monitors from bass, maybe they play better.
blackbird84:..This is how I think it should look like. Something missing?..
Thank you:This is quite adequate! This evening I will start entering this into MJK:s program..
b🙂
Thank you:This is quite adequate! This evening I will start entering this into MJK:s program..
b🙂
Thank you for sharing your knowledge and time. The response graph looks good to me, tomorow I'll start the assembly.
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