Been fiddling around with the print for the tiny ghetto blaster and was wondering if there would be any point/need etc to have a BSC or any other filter on these tiny drivers? I'm using the DMA45-08's for this project
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Need advice.... BSC on 1.5,inch drivers? Any poin?t?
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This would be a good application for one of those new 4-channel BT/DSP boards. You could add a tweeter and have a nice 2-way stereo BT setup. I've been working on the CPU code for an ESP32 micro that lets you control this amp using your cell phone. One of the menu items is BSC, which for this design would be fairly high (800Hz and up). It's also got full EQ and ADI's SuperBass algorithm. I still need to add the ADI DynamicBass algorithm, which will adjust the bass HPF based on the volume. Once I finish that, I will post a link to the code at this location: Mom’s Bluetooth Garden Table – Audiodevelopers Reborn. The link currently only has some background info, but details are coming...
I like the work you are doing with 3D printing, and I see a good match with the electronics described on my website. I'd be happy to send you a CPU or working CPU/amp, if postage isn't too nuts.Free Passive Speaker Designer Lite (PSD-Lite) -- http://www.audiodevelopers.com/Softw...Lite/setup.exe
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Baffle step happens regardless of the size of the driver. Where it occurs is a relationship between driver size and baffle size. Use the Diffraction tool in Vituix to play around with different baffle sizes, drivers sizes and driver positions to see the effects.Constructions: Dayton+SB 2-Way v1 | Dayton+SB 2-Way v2 | Fabios (SB Monitors)
Refurbs: KLH 2 | Rega Ela Mk1
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Originally posted by neildavis View PostThis would be a good application for one of those new 4-channel BT/DSP boards. You could add a tweeter and have a nice 2-way stereo BT setup. I've been working on the CPU code for an ESP32 micro that lets you control this amp using your cell phone. One of the menu items is BSC, which for this design would be fairly high (800Hz and up). It's also got full EQ and ADI's SuperBass algorithm. I still need to add the ADI DynamicBass algorithm, which will adjust the bass HPF based on the volume. Once I finish that, I will post a link to the code at this location: Mom’s Bluetooth Garden Table – Audiodevelopers Reborn. The link currently only has some background info, but details are coming...
I like the work you are doing with 3D printing, and I see a good match with the electronics described on my website. I'd be happy to send you a CPU or working CPU/amp, if postage isn't too nuts.
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Originally posted by 3rutu5 View PostSo being only 2 1.5 drivers, this isn't going to act as a low pass but instead remove any humps around 300?
Which is the opposite of the baffle step effect which in something like this:
On its own it wont compensate for anything else going on with the driver.Constructions: Dayton+SB 2-Way v1 | Dayton+SB 2-Way v2 | Fabios (SB Monitors)
Refurbs: KLH 2 | Rega Ela Mk1
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The BSC filter CAN be used (externally) on any (impedance compatible - to the filter "load") speaker - between the speaker and the amp.
(Like if you had a small pr. of computer speakers (w/OUT BSC) and just wanted to temp. "try" the filter to see if you liked it.)
I know YOU won't be using it in this way, since everything'll be inside your B-Box. Just sayin'.
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Originally posted by DeZZar View Post
No its a shelf filter. It does this:
Which is the opposite of the baffle step effect which in something like this:
On its own it wont compensate for anything else going on with the driver.
--------|----R------->+
I finally got aeound to fixing my printer so reprinting the tiny Bluetooth speaker idea
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No. The filter is comprised of inductor and resistor wired in parallel. The filter is wired in series with the speaker. The effect is that the resistor is in series with the load current and the inductor provides a bypass path for current around the resistor at lower frequencies.
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Looks like you're all sorted. Don't worry I still end up questioning myself - is this series or parallel? But yeah as JRT pointed out, parts in parallel, filter in series with driver. The inductor controls the point where the attenuation starts and the resistor controls how much attenuation is applied.
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Originally posted by DeZZar View Post
No its a shelf filter. It does this:
Which is the opposite of the baffle step effect which in something like this:
On its own it wont compensate for anything else going on with the driver.
It is interesting to see that once you plug the ZRD and FMA's in for this little driver that the majority of the DB's are below 80dbs even though it is listed online as 82dB 2.83V/1m. Which im wondering if there is an error online as the DMA45-8 is listed in that late 70's terrority.
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billfitzmaurice here for the DMA45-4 driver, the sensitivity shown is 82db. Am I misreading it?
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I went by this. If in doubt model the specs in your box program. https://www.daytonaudio.com/images/r...tion-sheet.pdf
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Originally posted by davidB View PostYou've got the 8ohm job, Bill.
Still seems a too big difference, maybe differing measurement methods?
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