It does depend on what your end goals are, if you want an efficient speaker this driver doesn't fit into it, but then neither do most of the 4-5" drivers that you could use as a midrange in a three way.
You surely can build a coax with 92+ dB sensitivity, the fact you don't see many of them around means there simply isn't a large enough demand for them. Just the same as 99% of the 4-5" drivers from the usual manufactures sit between 83 and 88dB sensitivity.
I think it's a shame that most manufactures don't have at least 1 high quality midrange driver aimed at being a pure midrange, with high sensitivity. The old Audax HM100Z0 was such a driver, proving that it could be done.
You surely can build a coax with 92+ dB sensitivity, the fact you don't see many of them around means there simply isn't a large enough demand for them. Just the same as 99% of the 4-5" drivers from the usual manufactures sit between 83 and 88dB sensitivity.
I think it's a shame that most manufactures don't have at least 1 high quality midrange driver aimed at being a pure midrange, with high sensitivity. The old Audax HM100Z0 was such a driver, proving that it could be done.
There are plenty of dedicated, high sensitivity mid range cone drivers but they tend to be pro jobs of 8-12"diameter. They usually achieve 97-101dB/1w.
Tannoy have been making 92-98dB co-axials since '48 but again usually bigger ie 10, 12 or 15 inch.
Tannoy have been making 92-98dB co-axials since '48 but again usually bigger ie 10, 12 or 15 inch.
This is all I could find, it's a 6", but works very well as a mid.
And I still have some in stock waiting for the right project. 🙂
That was the kind of thing I thought they'd be awesome in too.
Indeed, it's a 4 ohm unit so is really more like an 89dB unit. For a 6" I think the 18 Sound 6ND430 is probably one of the best choices. A pain of a chassis to work with mind you, but excellent specs. Zaph has reviewed the 16 ohm version, there is also an 8 and 4 ohm version, if the 8 ohm measures as well as the 16 ohm I think that'd probably be my pick for a larger high sensitivity midrange.
I have a pair too, sadly they are from different batches and measure quite differently from one another. From what I can remember one suffers from significantly worse breakup and is a couple of dB more sensitive too😱
I'll have to get around to giving them another proper measure one of these days, either that or make a centre channel out of one - that'd be quite a different beast compared to a tiny centre made with a L12RE/XFC.
Yup, nice looking driver, and I did consider it, but sadly out of budget for this project.
Now why do I get the feeling we've had this conversation before? 😀
Has anyone looked at the example enclosure and xover by Seas? The application pdf file is at Madisound: https://www.madisound.com/store/manuals/L12RE_XFC_Application%20note.pdf
The problem with all coaxials is how you solve the large hole in the tweeter response.
Drop goes 15dB down, then up, then down again, from 6.5K to 17K on this one.
But you may find a similar hole on all Seas coaxials, shifting the star and finish points up and down in frequency.
But it "magically" disappears in the proposed speaker project, with no LCR to correct the W shaped hole.
Drop goes 15dB down, then up, then down again, from 6.5K to 17K on this one.
But you may find a similar hole on all Seas coaxials, shifting the star and finish points up and down in frequency.
But it "magically" disappears in the proposed speaker project, with no LCR to correct the W shaped hole.
Hey there,
i'm using relatively old seas coaxspeakers in my homecinema
mp14rexf
The response of these coaxes is similar to the new ones now presented.
The problem is not the tweeter, wich can be crossed over at higher frequencys due to the coaxial system (in normal 2-way systems a high crossoverfequency can be a problem).
The real problem is the midrange. The peak at about 1500hz is a real pain in the ***. It is very hard to elimnate and sounds, if not surpressed, horrible.
After hours of simulating, combining filters and listening i found a crossovernetwork wich sounds "ok". If i have'nt had bought five of these speakers for only 90€, i would have chosen some other coax, wich is easyer to work with and sounds better.
This is the response of the midrange tweeter part of the 3way-speaker.
In my opinion there are better coaxials on the market.
Martin
i'm using relatively old seas coaxspeakers in my homecinema
mp14rexf
The response of these coaxes is similar to the new ones now presented.
The problem is not the tweeter, wich can be crossed over at higher frequencys due to the coaxial system (in normal 2-way systems a high crossoverfequency can be a problem).
The real problem is the midrange. The peak at about 1500hz is a real pain in the ***. It is very hard to elimnate and sounds, if not surpressed, horrible.
After hours of simulating, combining filters and listening i found a crossovernetwork wich sounds "ok". If i have'nt had bought five of these speakers for only 90€, i would have chosen some other coax, wich is easyer to work with and sounds better.
This is the response of the midrange tweeter part of the 3way-speaker.
In my opinion there are better coaxials on the market.
Martin
12" has quite poor dispersion when used as midrange.
Also, if you you 100 dB _midrange_ then you must have over 100 dB bass. And that means f***ing huge enclosure.
Even if your midrange is 90 dB, you must think 2x8" parallel for bass (~95 dB/W) or 15" PA bass which makes box very big.
Last edited:
What I don't think I see with the Seas data sheets is a woofer/tweeter composite response. I think I see separate responses for each driver superimposed on the data sheet.
I wonder what the composite response is like.... 🙁
I wonder what the composite response is like.... 🙁
They don't show that because it's highly dependent on the crossover.
Looking at the C16N001, at the very minimum, and not even talking about crossover slopes yet, you need to tame that nasty peak at 4000 on the woofer, and pad down the tweeter a couple of db to get in in line with the woofer's lower efficiency.
I would take a look at the Madisound 'Loki' kit for more info on using the Seas Coaxial drivers. Seas Loki MKII Coaxial Kit Parts Only - Each: Madisound Speaker Store It uses the 7" poly, but the general idea is going to be similar.
Looking at the C16N001, at the very minimum, and not even talking about crossover slopes yet, you need to tame that nasty peak at 4000 on the woofer, and pad down the tweeter a couple of db to get in in line with the woofer's lower efficiency.
I would take a look at the Madisound 'Loki' kit for more info on using the Seas Coaxial drivers. Seas Loki MKII Coaxial Kit Parts Only - Each: Madisound Speaker Store It uses the 7" poly, but the general idea is going to be similar.
Iam looking to build some small desktop near field (distance to ear about 64cm / 25") monitors for my project studio. would these new seas coax drives work for that? In combination with a subwoofer?
Has anyone built the br alighnment featured in app. notes? Actually, there seem to be two notes having two different sets of plans and two different crossovers.
I'm very interested in building mini monitors with these drivers and mating with a sub.
Karl
I'm very interested in building mini monitors with these drivers and mating with a sub.
Karl
- Status
- Not open for further replies.