SEAS driver choice for first build and some xMax problems

Hard as you try you still have that killer peak.

dave
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.
 
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Those specs are often optimistic.

I abandoned typical tweeters a long time ago, i usually onbly pay attention to how it does up to about 1kHz (for a 250-400 Hz XO) so pay little attention to what they do higher except that i like to see little or no ringing.

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A steady rising response up to about 3kHz. You’d have to flatten out the response in the XO and the natural 3kHz roll-off could be used as part of the filter. Beyond my pay grade.

A 7 litre box can work, in my miniOnken alignment. For a typicalreflex 15 litres would be suggested. And trying to physically fit a 7” driver in a 7 litre box could be problematic.

Wouldn’t be my first choice.

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
 
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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.
 
but more of a jazz driver than rock
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.
 
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dave
 
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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.
 
Have you looked at the SB15NBAC
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)
 
I would like to add wavecor wf152cu13 and 14, these will do in 2way very well, and both bass and midrange.
hmm diky, to vipada zajimavje.

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 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?