I have the vifa tc9 in small sealed box running of a amp for my computer and I have built the manzanita, it both cases the tc9 sounds really good
Thanks for the correction
I have measured the visaton FRS8-8 myself and i also have measurement report by HOBBY HIFI (german magazine).
while it is not bad, it has some resonances that show on the waterfall plot. I can post my measurement results later, if you are interested.
I hope not. It's a special driver.
There is stock at PE, and the driver is still up at Dayton's website.
Maybe Jantzen doesn't want to stock that driver anymore?
here is the frequency response for Visaton FRS8-8, on axis, 30° and 60 °, in a small box. low frequency was added as nearfield measurement and is not very accurate - resonance peak is probably too high. I was not fully aware of how difficult stitching measurements actually is, back at the time.
note the peak around 2kHz is caused by the baffle, not the driver.
my driver is rather old (~15 years), also has a much higher Fs (176 Hz) than specified by visaton, so maybe they changed and eventually improved the specs in the meantime.
EDIT: added another graph with spec sheet frequency response (black) with added frequency response measured in a 100/50cm baffle, equalized for infinite baffle (red).
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I have not heard this and item is in stock still in the US. It would be sad news if true. I might have to design my own woofer to replace this one and have it made by an OEM if true.
Unless for some reason they’re gonna stick with the paper version I don’t think they would ever get rid of that that’s one of their best sellers, by a landslide.I hope not. It's a special driver.
There is stock at PE, and the driver is still up at Dayton's website.
Maybe Jantzen doesn't want to stock that driver anymore?
The four ohm version, is back in stock next week or so so . So they’re all still active?
That said they did just replace/renew the design to further the rss models with the rss-he. (i can’t wait for the eight and 18 versions) the subwoofer version of these drivers and they’re always trying to stay one step ahead of the rest of the Chinese build house users. Even took a stab at the tang band w5/w6 1138/1139 or anarchy drivers 5/7 recently.
The RS225 is a superb driver and I hope Dayton keeps making it. However, I think I have enough knowledge and connections with OEM vendors that I could make my own custom woofer as good if not better, if needed to. Funding the production is the challenge and a GB or similar would be needed to get mass production pricing.
Hi,
I've been listening intensively since the completion and realized that the mids aren't as lively as I remembered and the bass is boomy. So get to the driver. The first thing I saw was that the felt in the cone was way too wide. Don't ask me how I converted 1 inch to 5 cm... So new felt glued in and the stuffing reduced to 3 grams (as the last version of the stuffing in the cone). Next I checked the woofer and noticed that there was "almost no" stuffing in the U-turn, only directly behind the woofer - I think this happened after the first basic reduction of the stuffing. So more stuffing in, properly distributed, listened to several times until everything was fine - and here it is, the great sound. Learning by doing.
I've been listening intensively since the completion and realized that the mids aren't as lively as I remembered and the bass is boomy. So get to the driver. The first thing I saw was that the felt in the cone was way too wide. Don't ask me how I converted 1 inch to 5 cm... So new felt glued in and the stuffing reduced to 3 grams (as the last version of the stuffing in the cone). Next I checked the woofer and noticed that there was "almost no" stuffing in the U-turn, only directly behind the woofer - I think this happened after the first basic reduction of the stuffing. So more stuffing in, properly distributed, listened to several times until everything was fine - and here it is, the great sound. Learning by doing.
Hi Rxr2,
Super work! Very cool to see another one of these TLs coming to life soon. You are using extra tall “eggcrate” (actually acoustic wall treatment) foam so I would be careful using double wall layer on the long stretch going from top to bottom. That might be too much constriction of the flow. I would remove one layer there to make sure you don’t block too much flow. Hope it’s not too late. Lower profile rounded eggcrate foam would be fine to use both layers. Good luck with building and first sound!
Super work! Very cool to see another one of these TLs coming to life soon. You are using extra tall “eggcrate” (actually acoustic wall treatment) foam so I would be careful using double wall layer on the long stretch going from top to bottom. That might be too much constriction of the flow. I would remove one layer there to make sure you don’t block too much flow. Hope it’s not too late. Lower profile rounded eggcrate foam would be fine to use both layers. Good luck with building and first sound!
I have same doubts about to much dump on back side. So tomorrow I'll cut hole for main speaker and I'll remove rear form from inner section. That will solve problem. Any way I'll make measurements in Rew and share with you both solutions
Eh... I made mistake and ordered the wrong speaker instead of 10f8424 I order 10f8414. Now I suffering from low trebles band.
So please advise me if you can, I see 3 options:
So please advise me if you can, I see 3 options:
- Order correct speakers (10f8424)
- Mod XO r1 and boost fullrange band
- More crazy but make sense in my opinion add a small tweeter like AMT mini-8 and redesign XO (add my project XO)
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Hi Rxr2,
10F/8414 is fine, it’s less sensitive than the 8424 so just adjust the resistor padding. Try R1 = 3.3R and R2 = 6.8R to bring up the treble. Or you may need more polyfill stuffing behind the woofer to reduce the bass. Do an impedance sweep to see what the peaks look like. I think adjust it until peaks are about 20 to 24 ohms and minimum saddle around 11 to 12ohms. Saddle minimum around 36Hz would indicate TL is working without air leaks.
10F/8414 is fine, it’s less sensitive than the 8424 so just adjust the resistor padding. Try R1 = 3.3R and R2 = 6.8R to bring up the treble. Or you may need more polyfill stuffing behind the woofer to reduce the bass. Do an impedance sweep to see what the peaks look like. I think adjust it until peaks are about 20 to 24 ohms and minimum saddle around 11 to 12ohms. Saddle minimum around 36Hz would indicate TL is working without air leaks.
I have to say that it sounds terrific! I'm really enjoyed. After adding polyfill and adjust R1 and R2 on my hand made tube amplifier and DAC sound perfect.
If some one looking for very high end tube amplifier i can say only that one http://www.audiodesignguide.com/PP2011/PP2012.html
I made several tube amplifier in past base on kt88 and b300 but that one is different in best way.
Back to the topic. I'm impressed how that speakers are transparent and free from distortion. They are one my best for peace and calm music enjoying.
If some one looking for very high end tube amplifier i can say only that one http://www.audiodesignguide.com/PP2011/PP2012.html
I made several tube amplifier in past base on kt88 and b300 but that one is different in best way.
Back to the topic. I'm impressed how that speakers are transparent and free from distortion. They are one my best for peace and calm music enjoying.
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Hi Rxr2,
Congratulations on a super build and another TL is borne in the wild! It’s a special speaker and so glad you were able to adjust the resistor and polyfill to your liking.
Enjoy your creation and please report back with your listening impressions once you have more time to listen to your collection.
Thanks for the tip on the tube amp. It looks super!
Congratulations on a super build and another TL is borne in the wild! It’s a special speaker and so glad you were able to adjust the resistor and polyfill to your liking.
Enjoy your creation and please report back with your listening impressions once you have more time to listen to your collection.
Thanks for the tip on the tube amp. It looks super!