You dont have to parallel the drivers you can have isobaric with the drivers in series. If you look the simulation the 4th order isobaric with the same Pioneer driver gives you approximately 8 db more at 50hz in a rougly 20 liter box while one closed subwoofer would need 47 liters. What is the more efficient design? I am not assuming anything i have built such a subwoofer.
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subwoofers with dual opposed drivers
- Thread starter Willem
- Start date
If you connect the drivers in series you reduce efficiency by 6dB, and need an amplifier four times higher output.
How can I look at a simulation when you don’t give any data? You say you built the speaker then you must have measured it and have the TS parameters of both designs in record. Please share those with us so that we understand what you are saying.
My sub was built some 15 years ago. The simulation is with a current production Pioneer TS A250D4. Use speakerboxlite and run the simulation for one driver with closed box and and an isobaric 4th order with maximun gain minimum bandwidth.
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Still no data, just explanation.
The data is all there if you want to know. Otherwise we can have someone build these as a community project and have it measured with the Klippel if you dont trust the simulation.
Where is that “there”?
SpeakerBoxLite. Subwoofer box calculator, Sub box calculator
Subwoofer box design online software. Subwoofer box calculator online. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Easy and convenient build your box.
SpeakerBoxLite. Subwoofer box calculator, Sub box calculator
Subwoofer box design online software. Subwoofer box calculator online. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Easy and convenient build your box.
Are you asking me to do the calculation in order to prove your point? Thats a first for me. You are basically saying: “I know what I’m saying but i can’t be bothered with data, here are the tools, prove yourself that I am correct.”SpeakerBoxLite. Subwoofer box calculator, Sub box calculator
Subwoofer box design online software. Subwoofer box calculator online. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Easy and convenient build your box.speakerboxlite.com
SpeakerBoxLite. Subwoofer box calculator, Sub box calculator
Subwoofer box design online software. Subwoofer box calculator online. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Easy and convenient build your box.
I am not sure to laugh or annoyed…
What do you mean it is ready for you to read it. Just choose graphs and enclosure.
Why don‘t you upload the results if its that easy?
I have done it in post #163.
Have a look again to that post and tell me wheres the data in it.
Ok try it again now:
speakerboxlite.com
Link to the calculations
Are you real? That is a link to a page that shows the TS parameters of a driver.Ok try it again now:
Link to the calculations
Why should I learn an app to prove your point that I disagree? Show me the data that proves your point. @amirm doesn’t ask us to learn to use an app to see the result of a design does he?
Have you ever built a subwoofer?
Perhaps you should start a thread about isobaric subwoofers. 
What has your question to do with the discussion we are having? If you want to know about my experience look at my profile.
You argue but won’t offer any data. That is a trolling behaviour.
Over and out.
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What is your comment on the project i showed as a manufacturer?Perhaps you should start a thread about isobaric subwoofers.
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