I don't remember any major issues in our investigations that could explain why you need to cut the horn above 5k. But I have heard some bad experiences of diaphragm issues for the TD-4001. If you cut the horn/driver in this way why using an Be driver?
By looking at your system the distance Woofer to horn is qu ite large. Too large imo.
Btw, the first mk3b2 horn is ready. With this horn you will not need the third way.
Yes, distance horn to woofer is too great, and nothing I can really do about that at this point. My original intention 2 decades ago was to mount a much smaller mid-range directly above the woofer in the cabinet - that did not happen.
I have the drivers so I will use them, and they certainly sound better than the Radian or JBL options on hand - lots more detail and better imaging. I had originally planned to cross at between 8 - 11kHz and was crossing at 10kHz when I decided to try something else.
I have the drivers so I will use them, and they certainly sound better than the Radian or JBL options on hand - lots more detail and better imaging. I had originally planned to cross at between 8 - 11kHz and was crossing at 10kHz when I decided to try something else.
Here is a thread about it.https://www.diyaudio.com/community/...ased-on-the-mk3b2.400627/page-11#post-7436127
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Just be cruel to yourself an put anew front plate with a higher cut-out for the woofer. The system will greatly benefit if both sources walk nearer together.
What I would also do with the Onken is cut the outer channels by 30° or 45° to avoid slot noise.
Can you describe how the sound improves with applying carbon felt over, and around the edges of your Yuichi a290....you indicated that the
" effect is dramatic ".....
Can you elaborate.......
Thanks.....
PS: Can you post a few pictures of what it looks like?
With my th4001 horn which is similar there were no audible issues with edge diffraction.
I assume the issues are related to either the system or the room. The foam makes the horn more narrow when only applied to the edges. So you may avoid room reflections and secondary phantom sound sources.
I assume the issues are related to either the system or the room. The foam makes the horn more narrow when only applied to the edges. So you may avoid room reflections and secondary phantom sound sources.
@kevinkr
Just a thought but you might want to insert a 10db resistive pad on that horn circuit and then rebalance your amps ( & overall system, I suppose ).
The thinking here is that JBL with their much acclaimed M2 control-room monitor ( which is a biamp system only ) still retains a 9db resistive pad within the horn circuit ( though it also has a paralleled cap for a bit of HF contouring )
- The M2 is very well regarded for its' coherent balance from the reviews I have read.
As I see it, the Lpad helps rejig the dynamics of the HF system ( dumb-them-down actually, like soft compression ) so that the horn more closely "tracks" the dynamics of the 95db sensitive woofer.
- Ya never know, this might solve your annoyance with the 5K-10K region.
I'm not going to sell the concept beyond those few words >> since it only costs mere dollars to try out and let your ears decide.
Just a thought but you might want to insert a 10db resistive pad on that horn circuit and then rebalance your amps ( & overall system, I suppose ).
The thinking here is that JBL with their much acclaimed M2 control-room monitor ( which is a biamp system only ) still retains a 9db resistive pad within the horn circuit ( though it also has a paralleled cap for a bit of HF contouring )
- The M2 is very well regarded for its' coherent balance from the reviews I have read.
As I see it, the Lpad helps rejig the dynamics of the HF system ( dumb-them-down actually, like soft compression ) so that the horn more closely "tracks" the dynamics of the 95db sensitive woofer.
- Ya never know, this might solve your annoyance with the 5K-10K region.
I'm not going to sell the concept beyond those few words >> since it only costs mere dollars to try out and let your ears decide.
Yes, I too was thinking along similar lines.
Primarily because the two members who both reported substantial improvements with adding felt, foam, etc, had both observed different issues prior to adding the various materials to their Yuichi A 290's ( Kevin reported a harsh quality to his A290/TAD pairing that was reduced or eliminated, and another member reported a "Cloudy" aspect to his Yuichi type Horn ...both these observations are dissimilar, which suggests room ( or equipment)
issues/ synergies ...
Just an observation ....
I wish I could explain in detail, but unfortunately I don't have the English ability to express the details.
The comparison work with and without carbon felt was easy to understand among the setting changes. Comparisons were easily made by simply pasting and peeling. However, I remember that there was no significant difference in the graph that measured the frequency characteristics. It is also a pity that the graph data cannot be presented.
I would be lucky if I could quickly find an image of the A-290 from that time. If you can't find the image, Currently, the speaker system is on hiatus due to plans to replace the amplifier. I think I'll try to remember those days and install it again.
In any case, after tomorrow... I'll need some time.
I remembered those days and reinstalled the speaker system. The enclosure is given an elevation angle with respect to the floor so that the axial center of the woofer unit faces each ear. Each horn is also angled towards the ear. The time alignment is adjusted by the Mini Shark, and the signal is supplied from the amplifier to each horn after being adjusted by a Luxman transformer attenuator.
Attachments
Please excuse if somewhat off topic, but would such reflections be a good deal less problematic with the smaller TN4001 horn-and further less problematic with a higher (triangular peaking at 11 ft) ceiling?
Smaller can mean it lets go at lower frequencies. On the other hand it might be OK if your waveguide is designed to be wide. In any case, you need size to go narrow.
Consider this when assessing your ceiling. I've illustrated below that a ceiling that slopes upward going back (green) will allow you to go wider before needing to treat your ceiling.
Its not necessarily a problem, just an observation of character in the vertical plane off axis. A high ceiling is much better in a few ways for integrating wide HF dispersion drivers, depending on how the room is treated.
The type of driver used won't change the horn's dispersion in the midrange. The treble depends on the driver's throat expansion rate and geometry.