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Multi-Way Conventional loudspeakers with crossovers

5 way small midrange ?
5 way small midrange ?
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Old 25th August 2020, 12:15 PM   #1
Richard Vienna is offline Richard Vienna
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Red face 5 way small midrange ?

i read a lot of the troels gravenson descriptions and projects and i like the idea of a 5 way
with an 4inch midrange and a 8inch woofer down to 200hz in sealed enclosures.

i want to build this as an active version with hypex plate amps, which will be "cheaper" as the passive version and dump the money into the chassis.(and yes, easier too

so i start with the midrange and here is the first breaking point.

i like maximum details in my speakers, and dynamics are also preffered. (arent those 2 opposite sides ?

the scan speak 12MU- seems to be the perfekt chassis.but i only do have experience with kevlar sandwich and alu membran. dunno if i like the sound of a paper membran.
also, im not sure if the paper membran of the 12mu fits
the "max details, please" requirements.


so my question, which chassis can you recommend as midrange for best resolution and maybe one for the lower mid (which fits the sonic profile of the midrange and alignment of WTC=0,58 down to 200 or 100hz .

the midranges i found are:

12mu-4731t00 of course, any better out there that doesn't cost as much as a space shuttle ?
ScanSpeak 12MU/4731T00 | HiFiCompass



4in-SB12MNRX2-25-4
light membran with 4,2g high qms.
don't know how good the resolution will be.

Tang Band W4-1337SDF
titan membran, 3,9g but lower qms, didnt found a distortion profile.
on the paper it looks better then the W12CY001
but paper doesnt tell me how good the resolution will be.
and... only 25watt. (the FA123 tweeter section uses max. 100W)
one german magazine tested it with a qms of 1,79


10F/4424G00
seems to be perfect too, but can only handle 10watt....
so its a no go.

Eton Symphony 3-400/A8/25MG
smaller, better distorion profile then 12mu-4731t00 but.. discontinued.
ETON 3-400/A8/25Mg | HiFiCompass

W12CY001
usable till 2000 max 2500hz according to audioexcite
heavy Mg membran 7,5g
www.audioexcite.com >> SEAS E0021 W12CY001
some say the seas have better resolution then SS
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Old 25th August 2020, 01:14 PM   #2
Pida is online now Pida  Czech Republic
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I am currently listening 12MU/18WU combo, and after all projects I am very very happy with the sound, so 12MU would be my first choice.
Other options:
NE123W - very low distortion, sounds nice
WF120BD03 - measured by hificompass, this could be very nice midrange
W12 Nextel with cone edge treatment from Troels
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Old 25th August 2020, 01:42 PM   #3
Bill poster is offline Bill poster  Thailand
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Eton do another neo motor 3"
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Old 25th August 2020, 08:51 PM   #4
mtidge is offline mtidge
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I'm listening to the SB12MNRX2-25-4 right now, crossed at 500hz and about 4Khz sounds nice, it does have a a 2db hump at 1.2khz and a 2db dip at 1.6khz but that might be edge diffraction. Here is my measurement.
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Old 26th August 2020, 01:05 AM   #5
adason is offline adason  United States
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My main speakers are based on dayton reference rs125. Its labelled as 5" woofer, but in reality its 4". Exceptionally clean midrange.

Dayton Audio RS125-4 5" Reference Woofer 4 Ohm
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Old 26th August 2020, 01:08 AM   #6
adason is offline adason  United States
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Another good sounding midrange I used was FaitalPRO 5fe100.

FaitalPRO | LF Loudspeakers | 5FE100
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Old 26th August 2020, 08:12 AM   #7
Richard Vienna is offline Richard Vienna
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Thank you all for your input ! i will check all those drivers!


@mtidge how is the resolution compared to other drivers you know ?


@adason my second project was 3 way with the RS150 /RS225 and a Seas tweeter.
i really liked it. the sound is still in my head and i'm trying to top it this time
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Old 26th August 2020, 01:03 PM   #8
mtidge is offline mtidge
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I'm not entirely sure what you mean by resolution. Where do you plan on crossing it over? Here is the manufacturer's FRD, it looks pretty good from 500hz to 4Khz, if you use it in that range it will very accurate. Funny, now that I look at it this FRD the peak and dip I described in my last post is not my cabinet but the driver itself. It also looks like I could add a notch around 6Khz.
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Old 26th August 2020, 01:50 PM   #9
Richard Vienna is offline Richard Vienna
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with resolution, i ment the ability to play details.
the problem is, i can't see this ability on datasheets

Last edited by Richard Vienna; 26th August 2020 at 02:05 PM.
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Old 26th August 2020, 02:23 PM   #10
AllenB is offline AllenB  Australia
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5 way small midrange ?
It almost seems that when someone asks for this, they are looking for a driver which will have a smooth response without further eq. Of course it will also need to be blended into and part of a smooth system that works well with the room. Then a speaker might reveal what is on the recording.

With care and adjustment, an inexpensive driver might do this too.

(There are other possible definitions of resolution)
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