Garage Speaker with one driver
Hi Community,
I am new in this forum / this is my first trade so please be patient with my novice question (I think i did read most of the threads about BLH and also did try to understand it as far as possible ..)
I saw on Thingverse a very nice design for a BLH based on a Visaton FRS 8 M an thought about printing it also for me and use it as an Internet Radio in my workshop (Back Horn Speaker V2.0 BL2 - Bluetooth, Active, Passive by guppyk - Thingiverse).
For this purpose i am required to redesign it bymyself in order to add a display on the front. Then i started to play around with Hornresp in order to understand the theory / relations about it a bit more.
Now i want to ask you guys if you have suggestions if there are ways to make more out of the given FRS 8M or if it's worth to build (print) them. If not i could also go with a Bassreflex design ...
Please find attached my Inputs from Hornresp and also my current design (The area inbetween the driver and the Horn output shall be used for the display / electronics).
The size is limited by my 3D printer (205mm x 205mm).
regards
Christian
Hi Community,
I am new in this forum / this is my first trade so please be patient with my novice question (I think i did read most of the threads about BLH and also did try to understand it as far as possible ..)
I saw on Thingverse a very nice design for a BLH based on a Visaton FRS 8 M an thought about printing it also for me and use it as an Internet Radio in my workshop (Back Horn Speaker V2.0 BL2 - Bluetooth, Active, Passive by guppyk - Thingiverse).
For this purpose i am required to redesign it bymyself in order to add a display on the front. Then i started to play around with Hornresp in order to understand the theory / relations about it a bit more.
Now i want to ask you guys if you have suggestions if there are ways to make more out of the given FRS 8M or if it's worth to build (print) them. If not i could also go with a Bassreflex design ...
Please find attached my Inputs from Hornresp and also my current design (The area inbetween the driver and the Horn output shall be used for the display / electronics).
The size is limited by my 3D printer (205mm x 205mm).
regards
Christian
Attachments
Last edited:
Fairly long and convoluted Horn path Printed PLA 'resonates' like a Tin can does.
Use Foam core ? Easier and will sound better.
Use Foam core ? Easier and will sound better.
Hi Bare,
thanks for your reply. I did also think about the usecase a bit more. Now i am not convinced that it's a good choice to start with my first design and dig into the whole back loaded horn complexity.
My main use case will be:
- A box which gives me a bit lower frequency then the FS of the Visaton FRS8M
- Size is not a major topic but i aim for about 2-3 Liters
- Output Power is not that important, as i think the drivers will provide enought for my small room
What i think will do:
Start with a bassreflex design and experiment a bit more with the bassreflex tube (diameter / length / flare etc.). As i did see that Hornresp also provides the possibility to simulate that box design i will try to come up with a proposal and post it here.
Hope i will find someone give me some proposal for improvements on this.
regards
Christian
Ps: Just saw your from Vancouver, really nice area there. Have been there during several business trips before corona, i hope i will have the change to come back soon 🙂 ....
thanks for your reply. I did also think about the usecase a bit more. Now i am not convinced that it's a good choice to start with my first design and dig into the whole back loaded horn complexity.
My main use case will be:
- A box which gives me a bit lower frequency then the FS of the Visaton FRS8M
- Size is not a major topic but i aim for about 2-3 Liters
- Output Power is not that important, as i think the drivers will provide enought for my small room
What i think will do:
Start with a bassreflex design and experiment a bit more with the bassreflex tube (diameter / length / flare etc.). As i did see that Hornresp also provides the possibility to simulate that box design i will try to come up with a proposal and post it here.
Hope i will find someone give me some proposal for improvements on this.
regards
Christian
Ps: Just saw your from Vancouver, really nice area there. Have been there during several business trips before corona, i hope i will have the change to come back soon 🙂 ....
It is hard to read hornresp curves, but the one you posted doe snot seem to produce much bass (for a horn to do bass it has to be big with a big mouth.
What you actually have is a poorly designed TL.
Given the size constarints you will acheiev a speaker that is smoother with more bass, A vented box, maybe a properly executed desktop TL like the BabyLabs.
dave
What you actually have is a poorly designed TL.
Given the size constarints you will acheiev a speaker that is smoother with more bass, A vented box, maybe a properly executed desktop TL like the BabyLabs.
dave
Hi Dave,
I am not that sure if i did get you right, therefore i try to repeat what i did understand.
- The thing designed is a poorly designed Transmission Line, and yes your right ...
- Your proposal is to go for a vented box design, but the BabyLabs is a bad example? or a good one?
I did try to design a bass reflex speaker in Hornresp, as i did understand the calculation is not exact for higher frequencies, is that right?
Do you think its worth to look a bit more into Transmission line speakers, because that would have been the other choice where i could use my 3D printer 🙂 and also do a bit of wood working ....
regards
Christian
I am not that sure if i did get you right, therefore i try to repeat what i did understand.
- The thing designed is a poorly designed Transmission Line, and yes your right ...
- Your proposal is to go for a vented box design, but the BabyLabs is a bad example? or a good one?
I did try to design a bass reflex speaker in Hornresp, as i did understand the calculation is not exact for higher frequencies, is that right?
Do you think its worth to look a bit more into Transmission line speakers, because that would have been the other choice where i could use my 3D printer 🙂 and also do a bit of wood working ....
regards
Christian
Attachments
Now i did look a bit more into the Design of a TL Speaker according to the proposed Baby Labs by Dave (see posts above), specially "THE LANCE" since i thought it matches the best to my available Visaton FRS8M driver.
My intention is to understand the shown result a bit better in order to know what are the design goals for a TL speaker and if it's the preferred design for me compared to a Bass Reflex one. So i added my comments and please feel free to add one or correct my understanding.
1st attachment you can find the Hornresp result comparing the TL with a BR design according the Fostex FF85WK manual (mounting information), both equipped with the Fostex.
- Very similar lower frequency
- TL a bit better a higher frequencys
- TL has more notches (maybe i need to add more infill damping in the calc?)
2nd thing i attached is the same Baby Labs "THE LANCE" equipped with the Visaton FRS8M.
- Very similar to the Fostex but a bit worse in the higher frequencies (is this critical?), so in general "THE LANCE" should fit for these drivers also.
3rd thing i attached is a proposal a bit modified to metric units (changed dimensions in order to be able to integrate the electronics / display etc.).
- No big change at all, so small modification do not harm that much and i could go ahead with this design.
4th thing a proposal for bit lower frequency, since i could go a bit bigger without problems, now that i won't use the 3D printer, but woodwork.
- Moved the peaks in the middle also to a lower frequency, but no major change in height.
- This one will provide a bit lower frequencies (will this really be the case, or do i buy some other problems by doing so?).
Thanks and best regards
Christian
My intention is to understand the shown result a bit better in order to know what are the design goals for a TL speaker and if it's the preferred design for me compared to a Bass Reflex one. So i added my comments and please feel free to add one or correct my understanding.
1st attachment you can find the Hornresp result comparing the TL with a BR design according the Fostex FF85WK manual (mounting information), both equipped with the Fostex.
- Very similar lower frequency
- TL a bit better a higher frequencys
- TL has more notches (maybe i need to add more infill damping in the calc?)
2nd thing i attached is the same Baby Labs "THE LANCE" equipped with the Visaton FRS8M.
- Very similar to the Fostex but a bit worse in the higher frequencies (is this critical?), so in general "THE LANCE" should fit for these drivers also.
3rd thing i attached is a proposal a bit modified to metric units (changed dimensions in order to be able to integrate the electronics / display etc.).
- No big change at all, so small modification do not harm that much and i could go ahead with this design.
4th thing a proposal for bit lower frequency, since i could go a bit bigger without problems, now that i won't use the 3D printer, but woodwork.
- Moved the peaks in the middle also to a lower frequency, but no major change in height.
- This one will provide a bit lower frequencies (will this really be the case, or do i buy some other problems by doing so?).
Thanks and best regards
Christian
