Hi,
This is my first foray into the DIY World. I'm trying to design a 2 way similar to the Zaph ZRT but with illuminator drivers instead of revelators. Looking for feedback on the steps involved in designing a speaker.
Primary objective: An impedance not lower than 4 ohms minimum to play well with a wide range of amplifiers.
1) I've picked the drivers: D3004/66200 and 18WU/4741TOO.
2) Gotten close to a flat FR in vituixCAD with crossover design. I don't like the tweeter playing down so low but have not been able to design steeper filter that works for me. Couldn't get rid of the 2 dB bump around 200 hz so I gave up thinking baffle step might help me with that.
3) Tried using the enclosure tool within VituixCAD. Bass reflex 2.5 cu ft. or 70 liters, I've attached the screenshot.
Problem is I designed the crossover with the 87.5 dB/w sensitivity rating of the mid range and brought down the tweeter a few dB, but the enclosure is now giving me and average SPL of 91 dB for the mid-range. Should I bump up the tweeter again? Or there is some other solution behind this?
Also Is this driver really going to give me a -3 dB of 25 hz? Seems too good to be true. I'm pretty confused so please point me in the right direction.
Your help will be greatly appreciated!
This is my first foray into the DIY World. I'm trying to design a 2 way similar to the Zaph ZRT but with illuminator drivers instead of revelators. Looking for feedback on the steps involved in designing a speaker.
Primary objective: An impedance not lower than 4 ohms minimum to play well with a wide range of amplifiers.
1) I've picked the drivers: D3004/66200 and 18WU/4741TOO.
2) Gotten close to a flat FR in vituixCAD with crossover design. I don't like the tweeter playing down so low but have not been able to design steeper filter that works for me. Couldn't get rid of the 2 dB bump around 200 hz so I gave up thinking baffle step might help me with that.
3) Tried using the enclosure tool within VituixCAD. Bass reflex 2.5 cu ft. or 70 liters, I've attached the screenshot.
Problem is I designed the crossover with the 87.5 dB/w sensitivity rating of the mid range and brought down the tweeter a few dB, but the enclosure is now giving me and average SPL of 91 dB for the mid-range. Should I bump up the tweeter again? Or there is some other solution behind this?
Also Is this driver really going to give me a -3 dB of 25 hz? Seems too good to be true. I'm pretty confused so please point me in the right direction.
Your help will be greatly appreciated!
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I feel so dumb I was not aware of this design. Can I just copy his design without buying the components from his linked kit, legally?
I'm only asking because his kit is out of my budget. About $1,000 more expensive than just the drivers for sale at madisound. What kind of crossover components are they selling?
I'm only asking because his kit is out of my budget. About $1,000 more expensive than just the drivers for sale at madisound. What kind of crossover components are they selling?
70l for single 18WU is too much. 30l is optimal
100Hz bump is what I also measured, do not bother with it, 18WU has one of the best bass sound and extension in that woofer size.
Crossover is wrong, phase tracking is wrong. Check projects of Troels for inspiration.
Be aware that Illumina-66 front baffle is tilted 5deg.
100Hz bump is what I also measured, do not bother with it, 18WU has one of the best bass sound and extension in that woofer size.
Crossover is wrong, phase tracking is wrong. Check projects of Troels for inspiration.
Be aware that Illumina-66 front baffle is tilted 5deg.
So long as it is for personal use then I believe the "open" designs i.e. those with the crossover component values included, from Troels are there for you to build. The majority of his designs are "closed" and have no crossover values and so the kit is only available through Jantzen.
I would build a parts list and find out the cost of each component, the PDF will give you the list - you may be surprised at the cost of the crossover parts even using entry level capacitors, the large coils can be expensive. Troels uses Jantzen components because of his tie up with them, no reason to use them just check coil impedance values are similar (wire gauge similar) and capacitor rating again are similar.
I would build a parts list and find out the cost of each component, the PDF will give you the list - you may be surprised at the cost of the crossover parts even using entry level capacitors, the large coils can be expensive. Troels uses Jantzen components because of his tie up with them, no reason to use them just check coil impedance values are similar (wire gauge similar) and capacitor rating again are similar.
Some build a "standard" cabinet with all 90-degree angles and include screw adjustable lifts, or an incline plane board on the bottom of the front baffle to produce 5-10 degree tilt. A DSP crossover capable of time alignment with a "standard" cabinet might be a future project.
Ah yes that is a big error on my part. I mistakenly used external dimensions for calculating internal volume. Thanks for pointing it out.
For me Scan Speaks do the magic.
- bass extension: 18WU wins, it goes really really low for that size
- percieved bass qualities of 18WU: transparent, punchy, energy, vivid, bass links are separated, plays really loud and effortlessly, it wants to bass 🙂, and everything is structured and separated, no boomy one note bass. It has the level od qualities I know from 26W revelator, NE225W, WF223BD
- percieved midrange qualities of 18WU: I used it as midrange in 3way project, transparency is what came to my mind, but also maybe too crispy, but I got message from the owner of the project that after some time the midrange smoothed out and he was very very satisfied with the overall sound and presentation (comparing to W18 Nextel, Satoris,....)
Satoris are very good, but after several projects with Satori and Scan Speaks, different drivers, different duties, so I have comparison, Illuminators win. Satoris MW16 and MW19, when used in 2way, I missed the energy and vivid character of 18WU, 18WU sounds more "in front of the loudspeakers", Satoris sound more "in loudspeakers".
- bass extension: 18WU wins, it goes really really low for that size
- percieved bass qualities of 18WU: transparent, punchy, energy, vivid, bass links are separated, plays really loud and effortlessly, it wants to bass 🙂, and everything is structured and separated, no boomy one note bass. It has the level od qualities I know from 26W revelator, NE225W, WF223BD
- percieved midrange qualities of 18WU: I used it as midrange in 3way project, transparency is what came to my mind, but also maybe too crispy, but I got message from the owner of the project that after some time the midrange smoothed out and he was very very satisfied with the overall sound and presentation (comparing to W18 Nextel, Satoris,....)
Satoris are very good, but after several projects with Satori and Scan Speaks, different drivers, different duties, so I have comparison, Illuminators win. Satoris MW16 and MW19, when used in 2way, I missed the energy and vivid character of 18WU, 18WU sounds more "in front of the loudspeakers", Satoris sound more "in loudspeakers".
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Does anyone know if I can use the Dome D3004/66200 instead of the D3004/6600 in the illumina 66 design by troels? He also has an alternative version at the bottom of the page with a ring radiator R3004/66200. They have very similar crossover designs but I want to safe since I am inexperienced and clearly my crossover skills are non-existent.