Hi! I'm trying to make a crossover for a 2-way Bookshelf Speaker using this two drivers:
It's a try to make a cheaper version of the parts-express C-Note MT.
Here the link: C-Note MT Bookshelf Speaker Kit Pair with Knock-Down Cabinets
TCP115-8 Frequency Response Graph:
ND16FA-4 Frequency Response Graph:
The 2nd Order Butterworth crossover I made with VituixCAD:
What do you think? I think for the price it is quite acceptable.
I appreciate any advice for a newbie 🙂
- Woffer: Dayton Audio TCP115-8
- Tweeter: Dayton Audio ND16FA-4
It's a try to make a cheaper version of the parts-express C-Note MT.
Here the link: C-Note MT Bookshelf Speaker Kit Pair with Knock-Down Cabinets
TCP115-8 Frequency Response Graph:
An externally hosted image should be here but it was not working when we last tested it.
ND16FA-4 Frequency Response Graph:
The 2nd Order Butterworth crossover I made with VituixCAD:
What do you think? I think for the price it is quite acceptable.
I appreciate any advice for a newbie 🙂
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If you are building these crossover as passive filters in the speaker, then this should go in the Multi-Way speaker forum.
Moved
I remember that about 1 month ago there was a similar thread with the same C-note kit, and I'm still seeing that strange cap in parallel to the tweeter. Same strangeness I arm seeing in your design. The values are out, unless you want to cross the tweeter at 1k...but usually you find the value of the inductor in the tweeter Path below 1 mH, and the value of the inductor in the woofer path above 1 mH (this, for the reason of the baffle step compensation).
I would Just Copy that P.E. design, omitting the 2uF in parallel to the tweeter...🙁
I would Just Copy that P.E. design, omitting the 2uF in parallel to the tweeter...🙁
Okey thanks! The resonance frequency of the tweeter is 2246 Hz, I will try but it will be pretty dificult to change it.
Is sad but I cross the tweeter at 1.5kHz because I couldn't make it enought flat if not xD
I have tried the C-Note crossover but it wasn't good for these drivers, I tried to change some numbers but then I saw that some components where doing pretty nothing and it evolve to a 2nd Order Butterworth.
I'm going to try move the cross and change that values. Thanks!
I have tried the C-Note crossover but it wasn't good for these drivers, I tried to change some numbers but then I saw that some components where doing pretty nothing and it evolve to a 2nd Order Butterworth.
I'm going to try move the cross and change that values. Thanks!
When I let the optimize tool change the values it moves the cross at 2kHz to make it flatter.
What about something like this?
I needed to add more components...
What about something like this?
I needed to add more components...
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That 77.6uG cap is WAY too large, likely so is the 0.94mH coil.
The 55uF on the woofer is too large, and the 0.135mH is too small as well.
Try a 1.5mH and 6.8uF on the woofer, and REMOVE that 1.18 ohm out in front. Placing a resistor ahead of the woofer is a bad idea that could lead to a fire-hazard.
How about a 4.7uF, 0.15mH, 5.6uF, and 0.25mH on the tweeter.
You will have to adjust values, as this is an off the cuff guess, but it will be much closer to where your values should be.
Later,
Wolf
The 55uF on the woofer is too large, and the 0.135mH is too small as well.
Try a 1.5mH and 6.8uF on the woofer, and REMOVE that 1.18 ohm out in front. Placing a resistor ahead of the woofer is a bad idea that could lead to a fire-hazard.
How about a 4.7uF, 0.15mH, 5.6uF, and 0.25mH on the tweeter.
You will have to adjust values, as this is an off the cuff guess, but it will be much closer to where your values should be.
Later,
Wolf
The resistor in the Woffer side is stupid, can change the tweeter resistor, don't think about it xD
Wolf, thank you for your message.
Apply your suggestions and looks like this.
There is a difference of 10db on peaks, i think there is still work to do but appreciate help.
Apply your suggestions and looks like this.
There is a difference of 10db on peaks, i think there is still work to do but appreciate help.
Okey, i will do it!
I did some changes from the wolf mate sugestions.
Now the 10db peaks are 6db.
The only thing that bothers me is the 0.6mH inductor, maybe is too big.
I did some changes from the wolf mate sugestions.
Now the 10db peaks are 6db.
The only thing that bothers me is the 0.6mH inductor, maybe is too big.
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Cheaper version:
2x9$ + 2x12$ = 42$
C-Note MT:
2x19$ + 2x26$ = 90$
C-Note MT Frequency response graph:
Experimental cheaper version:
Obviously is not going to be as good as the C-Note, but, Do you think, for almost half the price, it could be a good competitor?
2x9$ + 2x12$ = 42$
C-Note MT:
2x19$ + 2x26$ = 90$
C-Note MT Frequency response graph:
Experimental cheaper version:
Obviously is not going to be as good as the C-Note, but, Do you think, for almost half the price, it could be a good competitor?
Parts-express new thread like you suggested
Crossover for cheaper version of C-Note MT -
Techtalk Speaker Building, Audio, Video Discussion Forum
Crossover for cheaper version of C-Note MT -
Techtalk Speaker Building, Audio, Video Discussion Forum
The xo necessary is going to vary depending on how much baffle step compensation you need.
Below, I've put the drivers on a 6.5" x 9.5" baffle away from walls so with the full 6dB of baffle step loss. The other baffle diffraction effects are naturally included. The woofer is centered at 3.25"x3.5" and the tweeter is at 3.25"x7.5". I guestimated that the woofer acoustic center offset is about .75".
Attached is what I came up with in XSim. Measurements in the real world may be slightly different so don't take the sims for more than they're worth.
I'm not sure about the woofer's response above about 4000Hz but others seem to have been ok with it. On the other hand, I thought the tweeter resonance needed help so I've lowered that with an extra tanking inductor. Tweeter polarity is reversed and the reverse null is shown as well.
Ignore R1 - it's just there for the purposes of analysis.
View attachment 860340
Below, I've put the drivers on a 6.5" x 9.5" baffle away from walls so with the full 6dB of baffle step loss. The other baffle diffraction effects are naturally included. The woofer is centered at 3.25"x3.5" and the tweeter is at 3.25"x7.5". I guestimated that the woofer acoustic center offset is about .75".
Attached is what I came up with in XSim. Measurements in the real world may be slightly different so don't take the sims for more than they're worth.
I'm not sure about the woofer's response above about 4000Hz but others seem to have been ok with it. On the other hand, I thought the tweeter resonance needed help so I've lowered that with an extra tanking inductor. Tweeter polarity is reversed and the reverse null is shown as well.
Ignore R1 - it's just there for the purposes of analysis.
View attachment 860340
Attachments
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Thank you very much! I'm going to try recreate the same conditions. It looks pretty good 😀
Please, Could you tell me what software did you use to measure the baffle effects?
Please, Could you tell me what software did you use to measure the baffle effects?
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Being what you showed had likely accurate BSC with the parts I suggested, in a rise to +6dB below 1kHz. You did not factor in baffle-step in your previous sims.
I'm over reading your other thread at PETT as well.
Later,
Wolf
I'm over reading your other thread at PETT as well.
Later,
Wolf