The peak of the 5" Magnesium is easy to suppress, it is very high 8kHz, and doesn't disturb the usable range. For the 7"/8"/10" it is an other story.
The amplitude response of the magnesium series is very flat in the usable range.
It is not the same level of technology cone as MarkAudio MAOP series, you nearly have the same level of transparency without the peak.
But you will hear the distortion from the peak even after suppression. You can bandaid it after the fact, i expect some work would be needed to tame it at the source.
Not a driver i would go near… the same reason i would never consider Thor.
dave
Not a driver i would go near… the same reason i would never consider Thor.
dave
The reason seas responses look like they do is they measure in box with typical baffle step. They are honest in that regard. The shaded line indicates what an infinite baffle response would be without baffle step losses
In other words this would be an easy woofer to design for and get a smooth flat response. The issue might be you need to cross over 1.8khz or lower for good directivity matching
Once the peak is suppressed and damped, so is the HD. Measurements prove this.
I used the U18 in my Drottnar build. Great woofer in 15 ltrs vented, but more of a jazz driver than rock. Mids are to die for, and clean to 4k, but the impact region is lower than others. The issue at 850Hz is tolerable, but slightly audible. It's not offensive in the least, easy on the ears, and simple to use. I only needed a single lowpass coil on mine for a 2.5kHz LR2 with the 27TAC Titan.
I used the U18 in my Drottnar build. Great woofer in 15 ltrs vented, but more of a jazz driver than rock. Mids are to die for, and clean to 4k, but the impact region is lower than others. The issue at 850Hz is tolerable, but slightly audible. It's not offensive in the least, easy on the ears, and simple to use. I only needed a single lowpass coil on mine for a 2.5kHz LR2 with the 27TAC Titan.
Wow you guys are all awesome, this has been an amazing discussion, thank you all for the continuous info!
Alright thanks a lot for that tip, I believe I am looking for a rock driver so I will consider the magnesium. I read somewhere that old drivers are not good value anymore, but at 199 USD I think those seas magnesium drivers might be my best bet, a lot of people seem to love them. I am glad to hear that those peaks and the concerns I have read in this discussion might not be as bad as expected. I will just have to find something that can cross over lower. I am still hoping to fit a ribbon or amt in this build but we will see.
Thank you so much for your advice! Do you think there are any ribbons or amt's that can crossover that low or do I have to start looking at some domes?
oh nice and that's for a pair, I will have a quick look if those would be good for me. Maybe I can use those as my upper midrange and add a tweeter on top of the cabinet.
One of those situaationwhere adding a tweeter is as or more likely to degrade things as opposed to imprive them.
dave
dave
Last edited:
Perhaps hard to do it well with these high definition drivers ?
A small ribbon ? GRS RT1.R or Fountek NEO CD 1.0
I imagine the crossover frequency is high, nearly 5-6kHz. Crossover slope must be low 12dB max. It seems to be a difficult challenge.
A small ribbon ? GRS RT1.R or Fountek NEO CD 1.0
I imagine the crossover frequency is high, nearly 5-6kHz. Crossover slope must be low 12dB max. It seems to be a difficult challenge.
Its usually a case nof the XO subtracts more than it and the tweeter brings.
dave
dave
Last edited:
Hmm alright so no full range plus tweeter. I am still on the fence about those Seas Magnesiums. The sealed enclosure with the Scan speak you recommended is seeming a bit interesting. Lots to think about.
Yes this one 15W/8530-K01 is designed for closed box.
With all these drivers you are not going in a wrong way 🙂 They sound good.
With all these drivers you are not going in a wrong way 🙂 They sound good.
Hmm I have not, its considerably cheaper than most of the other drivers in this discussion. I may be silly for saying this, but sound wise, out of the few speakers I have been able to listen to, I think I prefer phase plugs. Looks wise, I don't like dust caps at all, I could enjoy a inverted dust cap tho. (but obviously, sound is priority)
The NBAC is a very low distortion driver especially in the midrange, no need to cross below 2kHz like the W15.
Seas U16, l16, w15 are all suitable for small 2way where also reasonably good bass is expected.
Scan Speak 15w revelator family is also suitable and well known for its qualities.
I would like to add wavecor wf152cu13 and 14, these will do in 2way very well, and both bass and midrange.
https://www.ari-acoustics.de/p/wavecor-wf152cu13
Scan Speak 15w revelator family is also suitable and well known for its qualities.
I would like to add wavecor wf152cu13 and 14, these will do in 2way very well, and both bass and midrange.
https://www.ari-acoustics.de/p/wavecor-wf152cu13
hmm diky, to vipada zajimavje.
I read that the Seas drivers are a bit smoother/neutral and amazing for music like jazz, does anyone here know how the paper revelator does in comparison?