Looking for different designs with ER18RNX alt. CA18RNX and a Seas tweet. - diyAudio
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Old 9th January 2013, 09:03 PM   #1
sibbeli is offline sibbeli  Sweden
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Default Looking for different designs with ER18RNX alt. CA18RNX and a Seas tweet.

Hi!

I am looking for different designs that is using theese seas drivers.
It seems to deliver quite good performance for the cost, even better than the CA18RNX that i was going to use from the beginning.

The speaker desing i am interested in are a full register speaker, likely a 2,5/3 way matched to a Seas tweeter.

Are there any designs out there that i am able to copy?

Or is it wizer to go with the CA18RNX insted as ithere are a handfull designs using those drivers?
Is the difference in distortion even noticable when these drivers are put in a box?

I recall that i in someplace read that distortion measurement on a single driver is quite useless, as when it is put in a system with another driver and differenet boxes, measurements no longer are useful?
I mean, there are so many things that can cause distortion in a system so is it even useful to look at distortion measures on a single driver?

If it is, is the difference between Ca18 and ER18 noticable?

What are your thougths on these drivers?


I am primarily looking for a design using good quality drivers so that i can build a already existing ddesing first, and then later experiment on my own when my knowledge on speakerdesigning is a little bit more existing

I was originally set on building Zaphs Waveguide TMM, but then when i realised there were some problems regarding getting hold of the waveguide i thought it would be a good idea to ask for some advise on good designs.

I am almost set on a SEAS only design, but i might change my mind if i get any good suggestions.

The system has to be capable of high SPL, thats why i am looking on 2,5 and 3 way systems. I like the idea of huge headroom, thus is high spl capability important.

Of course, distortion is a high priority too.


Price for drivers, around 500$


Thanks in advance, M.
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Old 10th January 2013, 08:16 AM   #2
Juhazi is online now Juhazi  Finland
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Hi, perhaps you could try this rather recent construction by Troels or some other his speaker. You can easily go with cheaper xo components.
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Old 10th January 2013, 11:08 PM   #3
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I have the ER18RNX in 24L tuned to the low 40s (with notch filter on the xover), Its a nice sounding, analytical speaker, but somewhat lacking in the low end, Looking at how Troels used the CA18RNX in the PMS, I expect it would be similar.
To my mind, the CA18RLY is a fuller sounding & more natural speaker & easier to crossover, but needs a larger box (I'm using 38L tuned to the low 40s, with the excellent 22TFF tweeter, currently my favourite system)
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