Ok, i had similar findings when i built nice mtm with peerless and hiquphon. I did not flush mount tweeter and there were minor ripples.
No matter what i put around the tweeter, it had no effect. So i stopped bothering.
No matter what i put around the tweeter, it had no effect. So i stopped bothering.
This doesn’t mean there isn’t a significant difference. It doesn’t mean you’ve been hearing things.
Or seeing things 🙂
Like Tribbles climbing up and down the speaker at night.
Seriously, i aggre, we can hear more than we can measure.
Like Tribbles climbing up and down the speaker at night.
Seriously, i aggre, we can hear more than we can measure.
I must now make a few listening tests. Perhaps even ask someone to change them with me blind folded...
I'm intrigued by the whole event - it's not the first of it's kind for me, but a more distinct one in quite a long time.
I have some more ideas for measurements which I might come back on...
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I'm intrigued by the whole event - it's not the first of it's kind for me, but a more distinct one in quite a long time.
I have some more ideas for measurements which I might come back on...
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New day, new eyes... I'll check into gating- thanks. 0, 15 and 45 deg measurements in the data.
Maybe I anticipated the HF to have the more impact of the fur - but looking at the LF section impact, its actually has as I see it a consistent impact it seems. Check these out:
HF 2,5m 15 deg
LF 2,5m 15 deg
LF 1m 0deg
There seem to be a constant damping for the woofer section that isnt there for the tweeter.
Agree?
When I twiddle with final tuning in an EQ section I surely think that low Q (<1), 0,3 dB adjustments are worth the trouble...
But - if it acts solely as a level control for the LF section it's not so useful 🙂
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Maybe I anticipated the HF to have the more impact of the fur - but looking at the LF section impact, its actually has as I see it a consistent impact it seems. Check these out:
HF 2,5m 15 deg
LF 2,5m 15 deg
LF 1m 0deg
There seem to be a constant damping for the woofer section that isnt there for the tweeter.
Agree?
When I twiddle with final tuning in an EQ section I surely think that low Q (<1), 0,3 dB adjustments are worth the trouble...
But - if it acts solely as a level control for the LF section it's not so useful 🙂
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So it would explain a difference that you heard in sound, but it doesn't seem helpful for the reasons you put it there...
At 15 degree there are differences, but I'm not sure which one I'd call "better".
It does not change the output enough to call it effective for what it was meant to solve. You could go wild with all kinds of materials to find a better solution but I'm not so sure the problem that needs solving (according to the sims) is real.
There was talk about the sound diffracting around the waveguide to disturb the low end off axis, but it wouldn't get a clear pass there as the throat of the horn and the compression driver would be in it's way. I don't think those two parts are modeled as reflective elements on the back side.
So if it doesn't reduce ripple higher up in frequency and it doesn't do much to reduce the lower frequency ripple of the CD off axis, than what use does it have? Unless listening tests tell a different story 🙂.
What would you have done if it measured worse, but sounded better? In Stereo anything is possible 😀.
At 15 degree there are differences, but I'm not sure which one I'd call "better".
It does not change the output enough to call it effective for what it was meant to solve. You could go wild with all kinds of materials to find a better solution but I'm not so sure the problem that needs solving (according to the sims) is real.
There was talk about the sound diffracting around the waveguide to disturb the low end off axis, but it wouldn't get a clear pass there as the throat of the horn and the compression driver would be in it's way. I don't think those two parts are modeled as reflective elements on the back side.
So if it doesn't reduce ripple higher up in frequency and it doesn't do much to reduce the lower frequency ripple of the CD off axis, than what use does it have? Unless listening tests tell a different story 🙂.
What would you have done if it measured worse, but sounded better? In Stereo anything is possible 😀.
Agree with you analysis. I will continuo with listening activities and see what comes out. Now at least there could be said that there are some mesurebale changes that could explain that I felt a change which in turn I heard as an improvement. If a real improvement is really in place need to be found out by playing a day without them and the putting them back... for this test to be "fair" I should EQ them equal between the trials... sigh... 🙂
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I changed the gating, both pre and post quite considerable and could not see and significant change - so it seems nothing to fetch there.
I see some lower level differences coming really late below - it looks like that the late reflections are a bit flatter then the early ones... ?
Reaching... ? 🙂
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I see some lower level differences coming really late below - it looks like that the late reflections are a bit flatter then the early ones... ?
Reaching... ? 🙂
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If it is a diffraction/early reflection issue then a response plot may not show too much.
I've noticed I can't crowd a distributed diffraction type of device. That's beside or behind it, so even from a position where it is completely diffracting.
True, maybe looking at an enlarged view of the IR (just behind the peak) of the first 3-4 ms would show more.
Calmer often is a good thing 🙂.
Today I finally swapped power amplifiers between Hi and LO.. This is something I have wanted to for quite some time now. An Anaview 50 watt was driving the HF and an Aiyima A7 (Ti) the LF. I won't make any measurements but I can say that it is a huge difference... I started playing the A7 in the HF without the LF section active. I immediately found that I could play much louder without strain and harshness. Using it all together is pure bliss - the upper region is now a marvel of detail and definition - nothing is harsh - just wonderful. I can hear som "hardness" in low midrange and I suppose its the Anaview. So I look forward to get that one out of the system. I have ordered a MA-12070 based amp to drive the HF - a really cheap one so it will need some attention probably... 🙂 but basically it should able to do the same job, or better, than the A7.
Music is flowing out of the system now ;-D so effortless - marvellous.... now I start to see that my goals with these speakers seem to be possible to reach. The imaging is like carved in stone (concrete?) and every takes place behind the speakers in now a quite bigger soundscape then before - nice...
Its now clear to me that a 18sound NSD1095N can indeed sound great if just driven properly.
Violin Sonata No. 1 in G Minor, BWV 1001: IV. Presto by Lydia Mordkovitch playing Bach Sonatas and Partitas, BWV 1001-1006 (1987), sound magical.
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Music is flowing out of the system now ;-D so effortless - marvellous.... now I start to see that my goals with these speakers seem to be possible to reach. The imaging is like carved in stone (concrete?) and every takes place behind the speakers in now a quite bigger soundscape then before - nice...
Its now clear to me that a 18sound NSD1095N can indeed sound great if just driven properly.
Violin Sonata No. 1 in G Minor, BWV 1001: IV. Presto by Lydia Mordkovitch playing Bach Sonatas and Partitas, BWV 1001-1006 (1987), sound magical.
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So after testing a few different low power amps alternatives I felt something was not right and ordered a bit more powerful option - https://www.audiophonics.fr/en/powe...lass-d-stereo-ncore-2x125w-4-ohm-p-12756.html
OK - this is home. One would think that > 1400Hz wouldn't require so much "strength" but that seem to be wrong - in every aspect is this superior to what I have tried so far. And I used exactly the same EQ/XO setting in my CamillaDSP setup except gain for the channels.
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OK - this is home. One would think that > 1400Hz wouldn't require so much "strength" but that seem to be wrong - in every aspect is this superior to what I have tried so far. And I used exactly the same EQ/XO setting in my CamillaDSP setup except gain for the channels.
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Hmm. I wouldn't have guessed you could even use a Watt. Maybe the other amp had a problem. It would be interesting to monitor the output on a scope while you listen.
Only reporting my experience. No evidence. Sorry 🙂 Its just that it sounds so much more relaxed and non grainy/thin...
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Playing along on my flowers and they are giving me a lot of musical pleasure. EQ is slowly falling into place... Inspired once again by the ATH thread, I made up a quick "tickler" from a sturdy "visit card". What I think happened was that the highs got some much needed body and weight. I had found the sound a bit thin but reducing the level by different EQ approaches never changed that really and reducing further just made the sound being "dark". Now with these ticklers I was able to increase the level, re EQ to get the right balance and get proper body to cymbals etc. A very nice improvement.
I did some 3D modelling and created a .stl to be printed by a fellow DIYer.
I wonder what happens - I suppose it breaks the circular symmetry in the throat where the pressure is at it's highest and prevents modes to occur. It seems to help a lot.
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I did some 3D modelling and created a .stl to be printed by a fellow DIYer.
I wonder what happens - I suppose it breaks the circular symmetry in the throat where the pressure is at it's highest and prevents modes to occur. It seems to help a lot.
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