Back at it again!
I see very little mentioning of the Seas titan tweeter
H1825-06 27TAC/GB
From what I can see it's a modern replacement to the pretty highly regarded DXT tweeter
H1499-06 27TBCD/GB-DXT
High dispersion, late 80 dB efficiency, metal dome etc. However, this time with power handling to the moon and back. I've read only review I've found of it. He found the two units to be a bit inconsistent with eachother. However, considering it's Seas I would assume it was because if them being early/pre production units. Other than that he was pretty happy with the performance. Does anyone have any thoughts on this tweeter?
I see very little mentioning of the Seas titan tweeter
H1825-06 27TAC/GB
From what I can see it's a modern replacement to the pretty highly regarded DXT tweeter
H1499-06 27TBCD/GB-DXT
High dispersion, late 80 dB efficiency, metal dome etc. However, this time with power handling to the moon and back. I've read only review I've found of it. He found the two units to be a bit inconsistent with eachother. However, considering it's Seas I would assume it was because if them being early/pre production units. Other than that he was pretty happy with the performance. Does anyone have any thoughts on this tweeter?
Why do you think it is a replacement of the DXT? I don’t think so. In fact, the H1212 and the DXT don’t need replacement, they are just fine.
As far as I know it's not a DXT replacement. The latter is a controlled directivity / small waveguide design & still available. The TAC/GB is arguably more an update for the 27TBC/G and the semi defunct 27TBFC/G (H1212) which is now moved to their 'vintage driver' category, albeit still available to order.
The H1825 has only been around for a few months, and Seas appear to be slightly out of fashion at present in some circles, while there is stiffer competition in this price bracket now than there was when the H1212 was new and pretty much 'the' affordable tweeter. I suspect it deserves more attention though.
The H1825 has only been around for a few months, and Seas appear to be slightly out of fashion at present in some circles, while there is stiffer competition in this price bracket now than there was when the H1212 was new and pretty much 'the' affordable tweeter. I suspect it deserves more attention though.
Last edited:
Well, because it's high dispersion you see, more so than the H1212. Maybe "replacement" is the wrong word usage, how about "modern interpretation of a high dispersion tweeter"
Well at that price I am not impressed with a mere 1 or 2 dB at 15kHz on 60 degrees. I dare put the statement that with the right implementation you won't notice the difference. Otherwise than spending double the cash.
You are talking about the titan vs dxt right? Regardless of dispersion, the linearity of the fr is mighty impressive. Don't know if that will result in a slightly bright top end if not carefully implemented.
As compared to the 27TDFC/TFFC or T25CF001 how does these Seas metal domes compare?
As compared to the 27TDFC/TFFC or T25CF001 how does these Seas metal domes compare?
H1212 holds up better in non-linear than both the Excel and the H1189. You should be able to kill the spikes in higher harmonics with a precision notch on the 26KHz fundamental if you feel so inclined. I don't know what the new H1825 is like, but I'd be surprised if it took a backward step from the H1212.
Wide dispersion and high directivity are more opposite than similar.
So, perhaps a complement, raher than a replacement.
Looks good, though.
So, perhaps a complement, raher than a replacement.
Looks good, though.
A waveguide is only high dispersion in the close off-axis. Say out to 30 degrees. In other words the off axis remains consistent out to 30 degrees so you get an even sound field. But this is where this ends. Arguably the whole point of the waveguide is to limit the dispersion in the far off axis and thus reduce the amount of energy thrown at the walls as it's these reflections that mess up with stereo imaging.
The 27TAC/GB and DXT have quite different overall off-axis profiles. You need a waveguide tweeter to replace a waveguide tweeter.
The 27TAC/GB and DXT have quite different overall off-axis profiles. You need a waveguide tweeter to replace a waveguide tweeter.
I thought waveguides were used to reduce the volume of the off axis response while keeping the on axis unchanged.
Is it right that narrow dispersion speakers tend to have better imaging, while wide dispersion speakers tend to have wider soundstage?
Is it right that narrow dispersion speakers tend to have better imaging, while wide dispersion speakers tend to have wider soundstage?
I used it in my 'EMP' design (It is posted here at diyaudio) with the Peerless 830991. It's a very nice tweeter. Caveat Emptor though as they are not matched as close as they should be.
I did tame the spike with a defeat switch, and I prefer it engaged.
Later,
Wolf
I did tame the spike with a defeat switch, and I prefer it engaged.
Later,
Wolf
No I would say not. In my experience the soundstage is just as wide with waveguides. If they are properly configured you get better imaging and a more relaxed presentation. Turn a waveguide tweeter up too much though and it will take your ears off. They seem far less forgiving of level mismatches vs naked domes.
"EMP", a svelte TMM tower...
There you go!
More background:
New Seas 27TAC/GB, some facts, some opinions, and some data... — MAC/DIY
Yes- I really like these! Granted, my objective was not on-axis results but above-axis results. Even so, the HD and such show well.
Later,
Wolf
There you go!
More background:
New Seas 27TAC/GB, some facts, some opinions, and some data... — MAC/DIY
Yes- I really like these! Granted, my objective was not on-axis results but above-axis results. Even so, the HD and such show well.
Later,
Wolf
I use the DXT with a 5" alu midrange - in principle like this:
DXT-MON | 5 ″ 1 ″ | Near field monitor | Compact speaker
Just added 2 SB 23NRX's below to give some volume before my 4 subwoofers.
I really do believe that they made a great piece of small art with this tweeter and it integrates wonderfully with smaller midranges, for a seamless coherence.
When I used it for movies or talks on youtube - my speakers create that great soundstage, where you simply forget that the speakers are there and the sound just emerge from the screen, which I surely think is because of that smooth power response 🙂
DXT-MON | 5 ″ 1 ″ | Near field monitor | Compact speaker
Just added 2 SB 23NRX's below to give some volume before my 4 subwoofers.
I really do believe that they made a great piece of small art with this tweeter and it integrates wonderfully with smaller midranges, for a seamless coherence.
When I used it for movies or talks on youtube - my speakers create that great soundstage, where you simply forget that the speakers are there and the sound just emerge from the screen, which I surely think is because of that smooth power response 🙂
Power Response (not axial FR) is a blend of all axes, and usually has a tilt down in profile. With a waveguide present, this Power Response is normally smoother.
Later,
Wolf
Later,
Wolf
I mean that the FR across the midrange and tweeter - is more smooth - also off axis.
Just as you can see in the links I made to Heissmann.
If you try to blend fx. a 6" midrange with a typical dome at 2,5kHz. Then the midrange is already beaming while the tweeter is still omni. So you get an energy hole in the crossover region - that to me sounds like a dull upper midrange and a tweeter that "sings" to much in a typical domestic room.