This will be my first attempt at using waveguided tweeter.
I already have a pair of spare Seas W22NY001 woofers, a set of Monacor WG-300 waveguides and a pair of Seas 27TDFC tweeters on the shelf.
I also have a suitable cabinet where the woofer will drop right in. Only need would be to re-tune the port.
The cabinet also have a cutout where the 27TBCD-DXT tweeter would drop right in.
My dilemma is; do I order a set of DXT tweeters or spend time on woodworking and use my WG300/TDFC combo. Which would give me the best results in terms of fidelity and XO design?
Any opinions and ideas for my project is appreciated. Will the WG300 allow for a lower XO frequency and/or lower order XO?
I have not seen any measurement for the WG300/27TDFC combo, but the data for found over at Zaph|Audio for the same tweeter in a similar looking WG looks promising.
Attached are the datasheets for Seas Woofer and the DXT tweeter.
I already have a pair of spare Seas W22NY001 woofers, a set of Monacor WG-300 waveguides and a pair of Seas 27TDFC tweeters on the shelf.
I also have a suitable cabinet where the woofer will drop right in. Only need would be to re-tune the port.
The cabinet also have a cutout where the 27TBCD-DXT tweeter would drop right in.
My dilemma is; do I order a set of DXT tweeters or spend time on woodworking and use my WG300/TDFC combo. Which would give me the best results in terms of fidelity and XO design?
Any opinions and ideas for my project is appreciated. Will the WG300 allow for a lower XO frequency and/or lower order XO?
I have not seen any measurement for the WG300/27TDFC combo, but the data for found over at Zaph|Audio for the same tweeter in a similar looking WG looks promising.
Attached are the datasheets for Seas Woofer and the DXT tweeter.
I have the millenium tweeters (Seas T25CF002) and i can't distinguish them compared to the 27TDFC on a blind test, it seems understandable because they have the same diaphragm.
The WG300/27TDFC combo will probably go lower and is not affected by the high frequency losses caused by the mesh grid that have been putted here to reduce the shrillness of the upper highs of the metallic dome.
The larger waveguide will both allow a lower crossover and better align your drivers.
Both waveguides will alter the top octave response on and off axis.
The DXT responds identically with and without the 'hexagrid'.
The wire size would start to cause interference at about 120khz. I have some, when one collected a bunch of lint I removed the grid.
No difference discernable or measured in near field(dist= 1/2 dia of waveguide).
Maybe use what you have on a removeable baffle. Then try DXT or other
later, when time/funds allow.
Then tell us what you think/like.
Both waveguides will alter the top octave response on and off axis.
The DXT responds identically with and without the 'hexagrid'.
The wire size would start to cause interference at about 120khz. I have some, when one collected a bunch of lint I removed the grid.
No difference discernable or measured in near field(dist= 1/2 dia of waveguide).
Maybe use what you have on a removeable baffle. Then try DXT or other
later, when time/funds allow.
Then tell us what you think/like.
H1499-06 27TBCD/GB-DXT
E0045-08S W22NY001
According to our talented forum friend Joachim Gerhard, a 8" (U22REX/P-SL in his experiments) plus the DXT play very nicely together on a coil and a cap with an attenuating resistor.
This to me is a green light for more sophisticated crossovery... 🙂
Just mention it because it might help, but at least 3 bass circuits at Madisound for the splendid W22NY Excel driver. Maybe the best 8" tidy midbass around.
SEAS Brand Archives - Madisound Speaker PDF Library
Going from a regular dome to a waveguide, the filter cap gets smaller and the coil bigger.
E0045-08S W22NY001
According to our talented forum friend Joachim Gerhard, a 8" (U22REX/P-SL in his experiments) plus the DXT play very nicely together on a coil and a cap with an attenuating resistor.
This to me is a green light for more sophisticated crossovery... 🙂
Just mention it because it might help, but at least 3 bass circuits at Madisound for the splendid W22NY Excel driver. Maybe the best 8" tidy midbass around.
SEAS Brand Archives - Madisound Speaker PDF Library
Going from a regular dome to a waveguide, the filter cap gets smaller and the coil bigger.
Last edited:
I was thinking that the WG was focusing more acoustic energy on axis on a resticted WB, how can a WG can "alter" the top octave ?
The WG300 is larger and will give you more fruit but will require extra routing as I understand. These are flimsy - filling their backs with silicone works great. A flatter hard dome pr a ring may indeed work better with these - I have used them with both ring radiators, soft domes and ceramic tweeters and like the third the most.
Look at Zaph's page about horn loading a dome.
The graphs will show you what happened in his particular case.
The reason that the response changes is that at a small diameter(which differentially affects higher frequencies) a waveguide is less flat. The angle is
higher where it more affects a 20k note than 15k, 10k, etc.
So, more or less support for the wave at differring wavelengths, whereas a flat faceplate/baffle is consistent till the shortest- though depending on the particular dome/surround and its position relative to the faceplate it may be better or worse
in a particular usage.
The graphs will show you what happened in his particular case.
The reason that the response changes is that at a small diameter(which differentially affects higher frequencies) a waveguide is less flat. The angle is
higher where it more affects a 20k note than 15k, 10k, etc.
So, more or less support for the wave at differring wavelengths, whereas a flat faceplate/baffle is consistent till the shortest- though depending on the particular dome/surround and its position relative to the faceplate it may be better or worse
in a particular usage.
A flat baffle is still a waveguide, just exibiting different properties. The Visaton smaller waveguide is also said to be good (never used it).