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Restoring a B77 is fun but not easy. The mechanic side of it is straightforward. Swapping out all old capacitors is very time-consuming. The calibration is actually not so difficult. I have used REW software to measure, as that shows frequency response, phase, and distortion. So you can adjust...

I do not remember if I mentioned this here, but you do not have calibration data for the phase in your microphone calibration file. Here is a video on how to add this to your calibration file. The video starts where this is explained.

Here are my recent measurements. I got the best base till now by measuring L, R and L+R speakers. Then I EQ the R speaker so the L+R looks nice. The "room gain" that I get is probably a sum of three different phenomena that all seem to be related to as room gain. Hz0 (Rene), Hz1 (Erin) and...

Can you show your room waterfall? I think it looks like you might have a standing wave at about 53 Hz. If so EQ that down. Don’t use Excell use Rew —-> All SPL / Action for All SPL / Trance Arithmetic. You can add measured traces like the nearfield and the port. I also think that you should...

I think Amirs video Understanding Audio Frequency Response & Psychoacoustics tell why you can smooth before the inversion or rePahse process. But looking at the curves maybe there is not so much need to smooth at least over 800Hz. And I must say that I can not hear the difference. I also use...

Ok I tried than you. Can I calculate the time and taps relation? I thought that if I could import to rePhase then saving from there would give me the taps setting.

My initial question entering this thread was, where can I adjust how many taps the inverted correction has when it is exported and convoluted? I have also tried to do Driver Lineration as Mitch suggests in his book. My Najda prosessor can prosess about 1000taps per channal. This is enough for...

Thank you for your writing so now I don't need to make the effort. It takes much effort to get to your conclusion. I know as I also made the effort and came to the same result. It took me seven years after entering the digital FIR EQ XO world. Now my dilemma with the perfect sound and curves...

Why not paste the link to the Alto Musik shop on ebay. Search does not find same things as your country region will show different search results.

My rooms longest dimension is 5 m. So that is way down from the 50Hz that seams ( see my measurement post #83) to be the gain start frequency. So then we do have a third gain variable after the Hz0 (Rene) and the Hz1 (Erin) described modes. This would then be the boundary gain witch in my case...

Hearing and listening are not the same thing. You will better understand and be able to recognise different sounds, quality, nuances etc. than a young listener would. Like wine or food, quality is better understood once you have some milages under your belt.

Erin is discussing this topic as well or is it another variant of the same idea being "Room gain"? He is calculating the f0 for where the room gain starts from the dimensions of the room. Here in this thread here, it has been presented that the room gain is a product of pressurizing the room. I...

I don’t know or find any speakers that are caled MM-6. But just do basic search and you find Thomann. https://www.thomann.de/fi/kali_audio.html

Neurocrome Modulus has been tested at ACR so we know what that represents. Modulus is in my opinion too expensive or let's say that I can not see the added value over a done right version that somebody else has done. The "Doner right" and several other boards can also work well as there is a...

Not a coincidence but both companies have their own LM3886 boards. It might be that one has looked at the other's design. But so has everybody who has built an LM3886 amplifier. Not a coincidence as the Neurocrome Modulus amplifier needed an SMPS and Connex Electronics has a reputation for...

No source connected and also tested with Najda DSP preamp with internal 8 channel DAC connected. Najda is entirely silent so same noise with or without a source. Tested D-amp bords with chip 3116 and also Tripath TK2050 amplifiers. I want to point out that the noise I hear is with very...

So I have JBL compression driver horns and also JBL 10" 2123 mid transducer with reported 101db sensitivity, 1W, 1m. These I drive actively with separate power amp channels. I have tried several D-class amplifier boards that do have noise that is clearly audible. So I have installed L-pads to...

It is completely wrong to say that you can not hear noise from the speakers if the level is below the noisfloor in the room.

There are two more question. 1) How do you start these amps if you go active and have several to start. 2) Moust of the 3255 amps are single ended in. But the chip is balanced in. How do you convert or bypass the single ended prestage to get balanced in. The 3E bord explains this but how to do...

Notice that there are 4 different board configurations at AliExpress and all at different prices. The one chosen here in the picture is the one to get. These was not awailable 2 weeks ago but now there is 137 boards I'm quite convinced that this is also the same board that audiophonics.fr is...