Recent content by Musician

Hi. I have just finnished a modification of my audiophonics ncore 125 amplifier , lowering the gain to 13 dB instead of 25,5 dB. Two SMD resistors had to be desoldered. The sound got better from the ne5532 in the ncore working only as a buffer with no amplifying. This modification is verified by...

As a start, one can always use audiotools with an iphone and use the peak hold function . Place the iphone at listening position and leave it there for 2 minutes with silence in the room. What you gonna see is the frequencies of the fundamental resonanses in your room , and all kinds of sound...

Passive ported speakers will benefit the most from Perry Marshalls trick because they dont have the nessessary high pass filter below fb.

The article by Perry might be worth a try, especially because its for free to try it .

You have to have the right order of crossover slope both LP and HP to have proper integration, in the acoustical domain . I dont agree on the one subwoofer religion , you really need two to have good sound .

Greatest difference is probably that the new Ultra will have an aluminium box, meaning it will be less prone to RF than the plastic WiiM pro and pro+. Therefore, I expect the Ultra to sound slightly darker and warmer , at least when you use the internal DAC and analog stage from the ultra and...

Having a step highpass filter right below the tuning frequency of the speaker lowers the distortion in a ported speaker, also at higher frequencies. Please read the article again. And many cheap subwoofers plays bass in a bad way , and you always need two subwoofers for good fidelity and...

youre right, I probably read 49 Hz , but wrote 39. Sorry for that.

By looking at the impedance curve. The blue arrow is the tuning point, give or take +-3 Hz. Another thing one can do is to use a slow sine sweep from 20-80 Hz , the cone will stand still and the basstube will bring lots of air at the tuning (fb) frequency. If the box leaks air, the tuning...

I would try : LS Frequency : 43 Hz ( for 55 Hz loudspeaker tuning ) Q = 3 Gain = -8

little extra: With the help of A4 paper sheets, which you roll up and put into the base tube to make it slightly smaller in diameter, you can lower the tuning frequency a number of Hz, for example from 39 to 35 Hz. A different tuning of the speaker. Then you can get noticeably deeper bass, if...

No, not really. The group delay will be lower with high Q shelving and give you better sound because the overshoot will be also ”the other way” , functioning as a sharp high pass crossover right below the bass ports tuning point - where its needed. This will give lower distortion also in the...

Sorry for late reply : 1. At soundstage https://www.soundstagenetwork.com/index.php?option=com_content&view=article&id=1804:nrc-measurements-bowers-wilkins-704-s2-loudspeakers&catid=77:loudspeaker-measurements&Itemid=153 , it looks like it is at 39 Hz . 2. No, at 20 Hz the difference are only...

Good question. You have to find the right settings for the peq and you must know the real tuning frequency of the loudspeaker. As with everything, it might result in worse results than without. The resulting frequency response for the meta is a simulation, but it comes from experience of real...

This is a trick thats often used in studios to make the soundmix more fuller and more impressive - the use of high Q shelving function to high pass the signal . This can also be implemented in a ported speaker . And as very few streamers on the market, the WiiM can do this. This can be done...