Due to the high Qt & high Fs anything approaching an infinite baffle should work. We put ours in 5.5 litre sealed. Attempts to extract more bass from them are likely accompanyied by some lumpiness.
dave
You can't go wrong with the 0.4x Karlsonator. Many happy builds with this one.
http://www.diyaudio.com/forums/full-range/239338-mini-karlsonator-0-53x-dual-tc9fds.html
Thank you for being the guinea pig build for the XKi with the FR83- sorry that did not work out. This one with the TC9 has been built with success at least a dozen times if not more. Folks unanimously praise how good it sounds.
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anyone build it from plywood?, also somewhat leery about the inexact science of front "curtain", meaning the exact measurement of how it should be made.
Look in the thread, probably more plywood than FC builds. The Karlson aperture is indeed dimensioned out in the drawings by Blaides.
Depending on your woodworking skills.
The mini karlsonators are very cute and would make nice presents.
I've built a pair of TABAQs and absolutely love them, plus, they are as simple as it can be if cabinet building is a challenge.
The mini karlsonators are very cute and would make nice presents.
I've built a pair of TABAQs and absolutely love them, plus, they are as simple as it can be if cabinet building is a challenge.
This thread reminds me of when we maxed out the Fostex 127e and produced many great designs. I built a BIB and a small slotted box. Both turned out great. In fact the BIB is one of my favorites. This little Vifa is destined to provide music lovers/speaker builders similar joy. I'll have to purchase a pair.
I know of at least 4 builds where they were used as presents for the significant other's computer desk. 🙂
Someone posted a simple design for one and two driver boxes on PE TT forum.
I used the single driver one in a pair of vented .20 box for 2 channel TV with a SMSL amp. I searched it out on DuckDuckGo for the post
Works well for that , especially for the price
I used the single driver one in a pair of vented .20 box for 2 channel TV with a SMSL amp. I searched it out on DuckDuckGo for the post
Works well for that , especially for the price
Does the TC9FD need a crossover? The first attachment is a crossover suggested by a German kit manufacturer. The second attachment are frequency response curves. The top curve is the kit manufacturer's measured response in their enclosure with their crossover. The bottom response curve is from Vifa's spec sheet.
The TC9FD is already inefficient. Why would I want to suck more out of it with a crossover that doesn't appear to offer anything?
The TC9FD is already inefficient. Why would I want to suck more out of it with a crossover that doesn't appear to offer anything?
Attachments
You can use each fullrange driver without crossover BUT that doesn't mean that the resulting sound is pleasing 🙂
I don't have experience with the TC9FD but if you can tell me the source of the crossover picture i may can help you with the design goals of the designer.
I don't have experience with the TC9FD but if you can tell me the source of the crossover picture i may can help you with the design goals of the designer.
Attached are the project plans. They were translated from German to English. 😉
Thanks for the assist.
Thanks for the assist.
Personally, I would not use a crossover with this driver. I tilt it to get the sound I like best. In the case of the TC9 I prefer it without any tilt. To my ears, adding a tweeter improves the sound of this driver.
https://speakerprojects.wordpress.com/2015/12/14/vifa-tc9-plus-helper-tweeter-on-open-baffle/
https://speakerprojects.wordpress.com/2015/12/14/vifa-tc9-plus-helper-tweeter-on-open-baffle/
I was going to make an enclosure for this driver using PVC pipe from Home Depot and use a 45 degree elbow to get some tilt.
I'm looking for a full-range driver so adding a tweeter adds complexity I'm trying to avoid.
I'm looking for a full-range driver so adding a tweeter adds complexity I'm trying to avoid.
Looks like the "crossover" is a filter that corrects for baffle step loss and includes a notch filter. Probably needed to sound it's best in the enclosure.
The translation is funny to read ��
The kit is designed for nearfield audio, so you will hear if the speaker are "shouting" at specific frequencies. Maybe thats the reason why they are using the filter for flattening the range between ~1.5kHz-4kHz. It is only some db in the upper midrange so probably for desktop use it was a bit too much...
The kit is designed for nearfield audio, so you will hear if the speaker are "shouting" at specific frequencies. Maybe thats the reason why they are using the filter for flattening the range between ~1.5kHz-4kHz. It is only some db in the upper midrange so probably for desktop use it was a bit too much...
It offers BSC, and yes, the driver sounds significantly better with the filter in place for fullrange applications without active EQ.
Don't get those two measurements confused... the one in the Vifa datasheet is measured on a standard IEC baffle, as one would expect for a datasheet measurement. The measurement provided in the German paper is measured in free space (presumably) mounted in the actual enclosure. Given how narrow the enclosure is, one would expect a 6dB drop in freespace for frequencies below about 3500Hz.
Here are my own measurements in an anechoic chamber, measured in free space with the BV filter in place:
http://www.diyaudio.com/forums/clubs-events/223294-diy-ottawa-winter-2013-a-20.html#post3466593
And here are a picture of the boxes as they were measured:
http://www.diyaudio.com/forums/clubs-events/223294-diy-ottawa-winter-2013-a-15.html#post3453876
http://www.diyaudio.com/forums/clubs-events/223294-diy-ottawa-winter-2013-a-21.html#post3467439
Finally, here they are in a setup with a subwoofer:
http://www.diyaudio.com/forums/clubs-events/252446-ottawa-diy-winter-2014-a-3.html#post3858298
If you plan to run these full range without active EQ, then the filter is definitely recommended. If you have active EQ, it is not needed.
As for tweeters, they are definitely not needed with these drivers if you're listening on-axis. See the measurements which show response up to 18kHz on-axis. I prefer them slightly off axis, but I can't hear above 15kHz.
Regards,
Owen
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