Have anybody seen any other measurements of Monacor SPH-175HQ than DIBIRAMA's??

Jump to Latest
M

MIJK

Member
Joined 2019
#1
Hi,

I am looking for a driver that's I'd exactly like DIBIRAMA's measurements of this driver?? I wonder because DIBIRAMA's measurements of frequency response is VERY different than on Monacor spec sheet, but the funny thing I have been looking for a driver that behaves like DIBIRAMA's measurement for over a year.

All other drivers DIBIRAMA's have measured have been correct and you can see the trend from the spec sheet the manufacturer supply.

So, my problem is that i need to find more measurements supporting DIBIRAMA's results.

Can you guys help me out with this?

The driver is really unusual if DIBIRAMA has got it right, i goes perfectly straight to 1800, thrn a small 2-4dB peak and after that just dies of totally! I mean there's like a 28db/,,oct lowpass at 2500hz.

This is JUST EXACTLY what i need for a driver in one of my project speakers.


Can you help me out? I know it is very popular i Germany but i am only able to read and understand german. Maybe some one german here can post in a german diy forum asking my same question?
Maybe a member on here might have a measurement of it?

Please help

Best wishes JK

I hope you can help me
 
#4
To me the Heissmann Acoustics and K+T measurements look very similar.
What is evident is the exceptionally low crossover point for a 6.5" driver, maybe chosen also for the weird FR of the mid-bass - I wouldn't use it full range, and would cross it over before the unusual low breakup zone. What strikes in the HA design is the tweeter chosen for a <2KHz crossover point.

Ralf
 
#5
i do think they differ, heissmann looks very controlled where k+t looks a lot worse

samuel_hq_klangundton_winkel.png


samuel_hq_winkel_innen.png
 
#6
If you look paste the obvious differences in representation, they are essentially the same.
The main difference is that the KT graph goes up to 40KHz, whereas the HA one stops at 20KHz, and is more smoothed.
Put a paper over the 20KHz mark on the KT graph and look again.

Ralf
 
#7
What i am after more specifically is if it drops off like it does at around 2,5khz.

I wonder because in my project that is a very sought of behavior.

It is intended för a speaker that will use as little as possible crossover parts and as DIBIRAMA shows it, only a small coil should work or even without coil as LP.


I have been searching for such a driver for a looking time and P17RCY is about as close as one can come to this but its drop off is too high, and also out of production..
 
#8
The project idea is that the drivers themself should stand for the LP/HP as much as possible by themself, with minimal XO components. A type of first order crossover but not really at all..

Instead of the usual looking for wide flat extended frequency response of the woofer for low order XO, I want to try the complete opposite.

Might sound like ****, might not but I don't know until I test it
 
#9
I am also on the book out for a tweeter with the older typ character from example seas H534/535 with a fairly early roll of but till stable and tolerant of using its own roll of as part of the XO.


Bit that so another thread! Right now i we'd to know if the 175HQ really has so short bandwidth and sharp roll of. It would be GREAT if it had..
 
#10
What i am after more specifically is if it drops off like it does at around 2,5khz.

I wonder because in my project that is a very sought of behavior.

It is intended för a speaker that will use as little as possible crossover parts and as DIBIRAMA shows it, only a small coil should work or even without coil as LP.
Click to expand...
The project idea is that the drivers themself should stand for the LP/HP as much as possible by themself, with minimal XO components. A type of first order crossover but not really at all..
Click to expand...

Your goal was quite clear from the beginning, but the Monacor driver is not the one you want for that. It has an early breakup at 2KHz, and if you run it full range I bet it will not sound right, and to bend the FR to a nice roll off you need more that a simple coil. The Heissmann Acoustics design celef posted here is the proof. Heissmann, who knows what he's doing, used a 2nd order electrical crossover for the woofer LP filter.

Your idea to use the natural roll off of a woofer as a crossover unfortunately only works if you look only at the on-axis FR. So off-axis the FR doesn't follow the on-axis roll off, and the combined FR of woofer+tweeter has an hole in the power response, and this is definitely not a characteristic of a good speaker.
Anyway, for a better candidate look at the Seas A26RE4.

I am also on the book out for a tweeter with the older typ character from example seas H534/535 with a fairly early roll of but till stable and tolerant of using its own roll of as part of the XO.
Click to expand...

This idea is even worse than the first one. Without a proper protection, i.e. at least a 1st order electrical network, a tweeter will fail quickly.

Ralf
 
#11
Hmm thank you I didn't think about that. But still, i know of speakers using driver told offs as part of the crossover, Elsinore for example which does it in both LP and HP(elliptical filter but still some type of first order)

I also know of another one using the SS22W Discovery in the same way, at a
lot higher point of crossover with a lot bigger driver.


Of it needs more than just a coil it is fine, it isn't that what'd important here.

The important thing is, does the driver behave as DIBIRAMA measurement, Monacors pdf och something else?


You guys with access to the old k+t, can't you scan the page i only started buying them last fall..

I would be SO thankful if anyone could find another measurement of them under somewhat know circumstances
 
You must log in or register to reply here.
Top Bottom