Live and learn.
I could not imagine that reflections from behind the microphone could affect the graph.
Thanks for the link, I'll do it as it says here
I could not imagine that reflections from behind the microphone could affect the graph.
Thanks for the link, I'll do it as it says here
It remains only to make the cabinets.
I wanted to repeat something like that, but just the opposite, with a rounded front panel.
Clearwave RBR curved cabinet build
After watching this post, in a dream I came up with a corpus and in the morning I sketched it
But the curved cabinets turn out to be too wide and i may not be able to assemble them. I guess I'll just order a CNC cutting of ordinary cases and make a round off, but will be difficult to make the veneer.
I wanted to repeat something like that, but just the opposite, with a rounded front panel.
Clearwave RBR curved cabinet build
After watching this post, in a dream I came up with a corpus and in the morning I sketched it
But the curved cabinets turn out to be too wide and i may not be able to assemble them. I guess I'll just order a CNC cutting of ordinary cases and make a round off, but will be difficult to make the veneer.
Attachments
Finally, there is something to show. So far, only one speaker is ready, without veneer, although it was purchased, but I wanted to have time to assemble it before the new year.
I was gone for so long, because, as usual, I decided to go the hard way .. I decided to make the cabinets from two layers: plywood 18 mm + MDF 16 mm. I paid for the cut from a friend. He only sawed, I did the rest of the gluing and assembly at home.
In the summer, he sometimes began to glue parts together when he was free. Then there was a lot of work, then a vacation, then a friend was busy and we could not finish the carpentry work.
And so, on December 21, we finally finished the front panel and I was able to start assembling. It took probably 7 days to assemble one cabinet from morning to night. And this is without veneer. So much time and effort .. Here I regretted that I decided to make such a coprus, and even such a big one ..
I knew about two ways: weight (layers + stiffeners) or just a lot of spacers. I had to choose the second way, it would be much easier, cheaper, and the difference is probably not so noticeable.
If you decide to make cabinets, I advise you to choose the second way, one layer + a lot of stiffening ribs + car vibration isolation.
Not all layers fit perfectly together, which caused problems and I had to take everything out of the bathroom, sand the protruding edges and putty there with an eccentric sander, then wash the bathroom from dust. Yes, I'm a little .. ready for radical solutions
I was gone for so long, because, as usual, I decided to go the hard way .. I decided to make the cabinets from two layers: plywood 18 mm + MDF 16 mm. I paid for the cut from a friend. He only sawed, I did the rest of the gluing and assembly at home.
In the summer, he sometimes began to glue parts together when he was free. Then there was a lot of work, then a vacation, then a friend was busy and we could not finish the carpentry work.
And so, on December 21, we finally finished the front panel and I was able to start assembling. It took probably 7 days to assemble one cabinet from morning to night. And this is without veneer. So much time and effort .. Here I regretted that I decided to make such a coprus, and even such a big one ..
I knew about two ways: weight (layers + stiffeners) or just a lot of spacers. I had to choose the second way, it would be much easier, cheaper, and the difference is probably not so noticeable.
If you decide to make cabinets, I advise you to choose the second way, one layer + a lot of stiffening ribs + car vibration isolation.
Not all layers fit perfectly together, which caused problems and I had to take everything out of the bathroom, sand the protruding edges and putty there with an eccentric sander, then wash the bathroom from dust. Yes, I'm a little .. ready for radical solutions
Attachments
I use the test cabinet as a second speaker. I cut a hole in it under the HF jigsaw. I don’t know when I will be able to start assembling the second cabinet. We need to get back to work. Most likely in two months I will only be able to start.
In my project, I was most worried about the sound of the 12 "speaker, because it is the cheapest. I was afraid that there would be booming and hum.
But everything turned out to be good. Apparently, due to the rigidity of the case + type Closed box, even in my acoustically unprepared small room, I do not hear a hum.
I have nothing to compare the sharpness of the bass with. It would be interesting to compare with the short move 12"
Now there are pleasant feelings from the fact that I have gathered at least one speaker. But it was very difficult ..
The advantage of ready-made speakers is that you can get them, turn them on, and, most likely, experience a strong pleasure in the moment. I did not have this in this case due to fatigue, due to the fact that everything did not work right away, due to the fact that I had been listening to the midrange speakers in the test case for half a year. Keep this in mind if you decide to take on your project. You may not feel a strong pleasure, but most likely then you will be proud of yourself for a long time and enjoy it, but in a different way
I really like the phrase Per aspera ad astra, so my path suits me too
In my project, I was most worried about the sound of the 12 "speaker, because it is the cheapest. I was afraid that there would be booming and hum.
But everything turned out to be good. Apparently, due to the rigidity of the case + type Closed box, even in my acoustically unprepared small room, I do not hear a hum.
I have nothing to compare the sharpness of the bass with. It would be interesting to compare with the short move 12"
Now there are pleasant feelings from the fact that I have gathered at least one speaker. But it was very difficult ..
The advantage of ready-made speakers is that you can get them, turn them on, and, most likely, experience a strong pleasure in the moment. I did not have this in this case due to fatigue, due to the fact that everything did not work right away, due to the fact that I had been listening to the midrange speakers in the test case for half a year. Keep this in mind if you decide to take on your project. You may not feel a strong pleasure, but most likely then you will be proud of yourself for a long time and enjoy it, but in a different way
I really like the phrase Per aspera ad astra, so my path suits me too
Attachments
On December 31st at 6:00 pm, I finished assembling and cleaning the room. I tried to set up the speaker through Equalizer APO, but nothing worked, I started trying to set up through Jriver, but nothing came of it either, I had to start getting ready for a meeting with a girl and friends. (In Russia, New Year December 31 - January 1 is the same as Christmas December 25. Everyone works until December 31, then holidays until January 9. Christmas in Russia is celebrated on January 7, but few people do it. The main holiday is New Year 31 December (Like Christmas)).
On January 1, I continued tuning through Jriver, it turned out very badly. But it was necessary to start watching Harry Potter with my gf, so they only looked at the midrange speakers.
On January 2, it turned out to be tuned through Jriver so that the music would sound, but for some reason twisted the phase by 2000 degrees. 2nd order filter.
On January 3rd, I returned to Equalizer APO. Finally, I figured out how to remap 7.1 channels. There were no such problems with the phase.
On January 1, I continued tuning through Jriver, it turned out very badly. But it was necessary to start watching Harry Potter with my gf, so they only looked at the midrange speakers.
On January 2, it turned out to be tuned through Jriver so that the music would sound, but for some reason twisted the phase by 2000 degrees. 2nd order filter.
On January 3rd, I returned to Equalizer APO. Finally, I figured out how to remap 7.1 channels. There were no such problems with the phase.
PC - Equalizer APO - Asus u7 mkii - x3 ampl SMSL SA300
Second order filtering. Kind of like 2nd order butterworth. The 2nd tilt is applied automatically.
As I understand it, in equalizer apo filters with a linear phase (I'm not talking about fir filter) or something like that? What does this mean to me?
LF - in phase
Midrange - in antiphase
HF - in phase
LF - MF - 300 hz
MF - HF - (2100 MF and 2500 Hz HF) ~2300 Hz
After 16 Parametric EQs I got this
Second order filtering. Kind of like 2nd order butterworth. The 2nd tilt is applied automatically.
As I understand it, in equalizer apo filters with a linear phase (I'm not talking about fir filter) or something like that? What does this mean to me?
LF - in phase
Midrange - in antiphase
HF - in phase
LF - MF - 300 hz
MF - HF - (2100 MF and 2500 Hz HF) ~2300 Hz
After 16 Parametric EQs I got this
Attachments
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And just magic for me. The delay between HF and MF is 0.09 ms. Look at how much it affected. This is not an error, I checked other delays, You can see the difference between 0.09, 0.1, 0.11 ms. Delay 0.09 - gave the best result.
I have tried different delays for HF and MF and LF. I looked at phase and impulse. Any delay spoiled the phase between MF + HF and LF. That is, as if the delay should have been "negative", then the phase would be straightened even more. I tried to add a delay 4+ ms, the phase leveled off, but the speakers became in antiphase, I made a circle. I left it as it is.
I have tried different delays for HF and MF and LF. I looked at phase and impulse. Any delay spoiled the phase between MF + HF and LF. That is, as if the delay should have been "negative", then the phase would be straightened even more. I tried to add a delay 4+ ms, the phase leveled off, but the speakers became in antiphase, I made a circle. I left it as it is.
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That is a really good result. Bit of weirdness at 200Hz etc but they're probably room modes and you'll need DSP to sort that.
Yes, I did not bother to fix it, since this is already a room, most likely. But this is the result already from x16 Parametric EQs
Guys, a super important thing that I was warned about, but I thought it didn't matter.
Any peak on the driver, even if it is very far from the filter frequency, will have a very strong effect on the frequency response. I can’t imagine how I would have fought this if it hadn’t been for DSP
For example. The frequency of the MF and HF crossover is 2300. The midrange driver has a peak at 8k HZ. It spoils the overall frequency response at 8k HZ very much, I had to add a -12 dB parametric filter for the midrange so that it stops affecting the high frequency frequency response
Any peak on the driver, even if it is very far from the filter frequency, will have a very strong effect on the frequency response. I can’t imagine how I would have fought this if it hadn’t been for DSP
For example. The frequency of the MF and HF crossover is 2300. The midrange driver has a peak at 8k HZ. It spoils the overall frequency response at 8k HZ very much, I had to add a -12 dB parametric filter for the midrange so that it stops affecting the high frequency frequency response
As for the sound. When the crossover frequency was 200 Hz. I lacked the strength in my voice, although the frequency response was even. When I rearranged the crossover frequency to 300 Hz, so that 12 "started to pick off the lower part of the voice, the upper bass, this problem went away. When both speakers are ready, I will try to put it down.
Otherwise, I don't hear any problems. There is no hum, rattling, dirt, if the recording quality is good.
The image of the voice is wide, apparently due to the width of the cabinet. In my previous columns, Adam t5v, it was smaller. I don't know yet if it's + or -.
Although the image of the voice is wider, the stage does not collapse from this, when there are sounds to the left or to the right, they are perfectly audible, they do not merge with the voice. Well, it's too early to draw conclusions until both speakers are ready. Excellent detail.
It's a pity I have nothing to compare, I sold all my speakers.
There are no problems with chipboard, no glitches, I don’t notice sound lags, as it was with Jriver, I’m very glad that everything worked out and very budget. Sometime later it will be possible to replace it with a better 7.1 DAC and other amplifiers.
In general, unfortunately, I did not experience orgasms from the sound, because had to spend 3 days setting up, etc. It's hard to say whether I was not impressed by the sound or because I did not get an instant wow effect from the finished product. But overall, I'm glad.
Otherwise, I don't hear any problems. There is no hum, rattling, dirt, if the recording quality is good.
The image of the voice is wide, apparently due to the width of the cabinet. In my previous columns, Adam t5v, it was smaller. I don't know yet if it's + or -.
Although the image of the voice is wider, the stage does not collapse from this, when there are sounds to the left or to the right, they are perfectly audible, they do not merge with the voice. Well, it's too early to draw conclusions until both speakers are ready. Excellent detail.
It's a pity I have nothing to compare, I sold all my speakers.
There are no problems with chipboard, no glitches, I don’t notice sound lags, as it was with Jriver, I’m very glad that everything worked out and very budget. Sometime later it will be possible to replace it with a better 7.1 DAC and other amplifiers.
In general, unfortunately, I did not experience orgasms from the sound, because had to spend 3 days setting up, etc. It's hard to say whether I was not impressed by the sound or because I did not get an instant wow effect from the finished product. But overall, I'm glad.