Hi Prasi, good to see you are making improvements! on the question on phase, I just try to get it as close as possible over as wide a frequency range either side of the crossover as possible. A deep null is a good indication if it is close enough. a wide shallow null probably indicates that more work is needed 🙂
On the DATS tester, I haven't used it (or the WT3) I don't know if it is good value (how much is that in $US? I'd be more inclined to spend the money on a good external sound card (I can't remember how much the focusrite 2i2 like what I've got was. You can make up a test jig that will do the job of the WT3 for probably $5 US. and you get the other benefits that the sound card brings (like being able to use it for accoustic measurements if you get a microphone later.
Tony.
On the DATS tester, I haven't used it (or the WT3) I don't know if it is good value (how much is that in $US? I'd be more inclined to spend the money on a good external sound card (I can't remember how much the focusrite 2i2 like what I've got was. You can make up a test jig that will do the job of the WT3 for probably $5 US. and you get the other benefits that the sound card brings (like being able to use it for accoustic measurements if you get a microphone later.
Tony.
Hi TOny,
the DATS tester is about 170 USD. regarding the 5$ jig , is it same as that of claudio negro' website that you had shared earlier? the sound card is an issue. Can I use USB sound cards (which plugs into USB) and there is a line in and line out . some are even 5.1 channel. ebay is full of them chinese cards. probably a reknowned company like Creative sound blaster X Fi could be a solution for me? Sound Blaster X-Fi HD .
the DATS tester is about 170 USD. regarding the 5$ jig , is it same as that of claudio negro' website that you had shared earlier? the sound card is an issue. Can I use USB sound cards (which plugs into USB) and there is a line in and line out . some are even 5.1 channel. ebay is full of them chinese cards. probably a reknowned company like Creative sound blaster X Fi could be a solution for me? Sound Blaster X-Fi HD .
Hi prasi, yes the one I linked to on Claudio's site. Yes you can use a usb sound card with line in and line out. for speaker testing anything that will do 48Khz should be more than adequate. That sound blaster looks fine. It doesn't have a mic input or phantom power, so if you were to get a microphone down the track you would need a mic preamp to go with it. But for doing impedance measurements it would work just fine.
Tony.
Tony.
Hi Tony,
sorry for my ignorance for asking the question below... ( but believe me, ignorance is blissful... all those sony speakers i used to listen to and think that nobody can beat sony.. then i discovered diy and quest for better and better sound and its costing me lot more than i had ever imagined)....
coming to the point, that sound blaster does seem to have a mic input... here is a paste from the specs
Maximum Recording Quality: Up to 24-bit/96kHz
I/O Connectivity:
Headphone : 1x Amplified 1/4”
Line Out: RCA (L/R)
Optical Out: S/PDIF
Optical In: S/PDIF
Microphone In: 1x 1/4"
Line / Phono In: RCA (L/R)
or is not the as per the requirements for the measurement of speakers?
reg
prasi
sorry for my ignorance for asking the question below... ( but believe me, ignorance is blissful... all those sony speakers i used to listen to and think that nobody can beat sony.. then i discovered diy and quest for better and better sound and its costing me lot more than i had ever imagined)....
coming to the point, that sound blaster does seem to have a mic input... here is a paste from the specs
Maximum Recording Quality: Up to 24-bit/96kHz
I/O Connectivity:
Headphone : 1x Amplified 1/4”
Line Out: RCA (L/R)
Optical Out: S/PDIF
Optical In: S/PDIF
Microphone In: 1x 1/4"
Line / Phono In: RCA (L/R)
or is not the as per the requirements for the measurement of speakers?
reg
prasi
ah ok I didn't see that. I guess the main difference with MIC inputs is whether they have phantom power or not. Not all mics need phantom power (about 48V) but some do.
It's not an area that I have had to worry about as I have a mic preamp (diy) and use a mic that doesn't need phantom power (but is not calibrated). another way of providing phantom power is what's called a battery box, again not something I have actually dealt with.
Tony.
It's not an area that I have had to worry about as I have a mic preamp (diy) and use a mic that doesn't need phantom power (but is not calibrated). another way of providing phantom power is what's called a battery box, again not something I have actually dealt with.
Tony.
Hi Tony...after long time,
Have you started with your active speaker buid project? If so, pl post links .
Now I am planning to build full range speakers for my HT with Dayton RS100-8 drivers. It is possible for me to get the individual drivers measured with DATS V2 from the vendor (at extra cost). He will be able to provide impedance and T/S parameters. Will this be sufficient to design a notch filter? pardon my ignorance but still learning ....I will share "BOXSIM" the simulation with RS100-8
reg
prasi
Have you started with your active speaker buid project? If so, pl post links .
Now I am planning to build full range speakers for my HT with Dayton RS100-8 drivers. It is possible for me to get the individual drivers measured with DATS V2 from the vendor (at extra cost). He will be able to provide impedance and T/S parameters. Will this be sufficient to design a notch filter? pardon my ignorance but still learning ....I will share "BOXSIM" the simulation with RS100-8
reg
prasi
Hi Prasi, I've made some progress, but measurements (below 200Hz) have been a bit challenging, so I have not optimized it as well as I would have hoped 🙂 The thread with the active crossover is here --> http://www.diyaudio.com/forums/analog-line-level/164886-synergy-active-crossover.html as you can see it has been a very slow process getting to here 😉
I've had some other priorities of late... work and working on my car, as well as family stuff, so I've not done anything for a while. Hopefully will get back to it again in a few weeks.
I do not think that impedance and T/S parameters will be sufficient for designing a notch filter. You really need accoustic measurements on your final baffle to do that effectively.
The T/S params will be useful for designing your cabinet of course. But you really need impedance data, and accoustic data to do the notch filter. I guess if there is a manufacturers curve for the driver that you can spl trace, then you could use that combined with the actual impedance measurement to design the notch.
Tony.
I've had some other priorities of late... work and working on my car, as well as family stuff, so I've not done anything for a while. Hopefully will get back to it again in a few weeks.
I do not think that impedance and T/S parameters will be sufficient for designing a notch filter. You really need accoustic measurements on your final baffle to do that effectively.
The T/S params will be useful for designing your cabinet of course. But you really need impedance data, and accoustic data to do the notch filter. I guess if there is a manufacturers curve for the driver that you can spl trace, then you could use that combined with the actual impedance measurement to design the notch.
Tony.
Hi prasi, Nice speakers.
Your pdf showed the enclosure to be book shelf, but the image you shared is of floor stander.
What is the size of the box.
Your pdf showed the enclosure to be book shelf, but the image you shared is of floor stander.
What is the size of the box.
hi,
yes, the planned design was bookshelf speakers initially. However at the last moment it was converted to floor standing. here is the updated drawing. As you can see from the drawing, the bottom portion of floow stander has a divider which seperates the speaker cabinet. Hence the volume is almost equal to that of earlier planned bookshelf.
reg
prasi
yes, the planned design was bookshelf speakers initially. However at the last moment it was converted to floor standing. here is the updated drawing. As you can see from the drawing, the bottom portion of floow stander has a divider which seperates the speaker cabinet. Hence the volume is almost equal to that of earlier planned bookshelf.
reg
prasi
No. I do not have that equipment. Instead I relied on manufacturers data and some designs already built by others.
You should try this , Low frequency response will be considerably lower and better.
You can check the graphs.
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