M(A)TCH type crossfrequency management


rec1227-192622 piano

LC Crossfrequency Management System for Real Sound in Three Way Speaker System





In 1976 graduated Electricity/Marine Electricity in Gdansk Technical University – Poland. In 2002 graduated also on the same University in Shipbuilding.


In professional carrier designed new ship’s power electricity systems, in 1991- 1995 serviced supertanker’s in 24 hours pneumatic and electronic automation systems service in ports and shipyards of Singapore, Dubai, Bahrain. Over 15 years Ships Class surveyor. 2006-2009 Managing Director established by him egyptian company in Egypt.


In 1991- 1993 member of Audio Engineering Society as Manager of owned by him company in audio field. Inventor of patent regarding Crossfrequencies managing circuitry. Since 1990 year engaged in hobbyist creation and playing music (youtube with nick Mikexception) and at the same time developing super real creation of sound with conventional drivers and passive crossovers.

          At the beginning author want’s to explain name „Crossfrequency management circuitry” given by him instead of traditionally „Filters” or „Crossover”. Apparently word filtering considers the meaning to predefined perfect separation of elements according to parameters from whole complex. In such way operate LC frequency filters in widely used crossovers. They target is maximum separation of bands each from other so eventual infiltration is treated as not proper. The idea of traditional filters is to create three independent systems speaker – filter to transmit acoustic signals which optimally, it means according to primary information delivered to terminals shall be added in the air. This systems called crossovers should not change time alingnment in narrow bands of frequencies and together with speakers not to affect the amplitudes. Moreover their parameters should match requirements created by speaker physical limitations to what author shall not comment as it is not in close consideration to the subject. Additional requirement is to pass the energy in more or less balanced way in function of frequency.


         All this is possible for crossovers only in very approximate ways due to fact that processes inside electromechanical systems in 1000 times range change of frequency in practice make it impossible to theoretical analyze. The worst structural problem created by them is providing a change in phase angle in ranges of cross frequencies what means that mathematically signals have parameters of vector calculation excluding their instant balance.


                In the past years author evaluated acuostic systems and crossovers. Subject of them were particular three : 1) pararel LC type 12dB/oct, 2) pararel and serial 6dB/oct, 3) serial electrical connection of special drivers selecting radiated band by their purpose. The last was long time ago applied in .old tube radios. What is interesting today most listeners appreciate their pleasant and non-obtrusive sound what should turn our attention.. It could be indication that after a years of efforts technique  of converting electrical signals to acoustic has stuck. Confirmation could be that today market is booming with multichannel constructions with subwoofers from 4.1 to 7.1 and more with artificial programming as replacement of real sound. Disappointed music lovers and audiophiles having more needs than computer multichannell are left in margin of expensive field, still not satisfactory due to complexity of combinations .

              As mentioned author’s attention was turned by specific disadvantages of some deliberated frequency division systems. The LC parallel filtering with 12dB/oct acquire unpleasant way of behaviour in ranges where the transmission is passed from one band to other. To hide this irregularities to level accepted by hearing usually side frequencies must be emphasized. It is not author’s desire to analyze deeply what is going on but the reasons are mainly contra phase distortions, not aligned speaker and crossover amplitude characteristics and additionally existence of created unwanted filters consisting of inductions of coils and resonances of diaphragms which are generating false voltages.

                Serial filters 6dB/oct have much less visible irregularities due to more stabilized parameters ( less speed of increase mean better compensation as mentioned in point 8 of thesis). The problems are wrapped good but their disadvantage is low damping factor and limitation to two band crossovers which together means barrier to bigger dimensions of lowtoner due to required tweeter power.


                For real sound, in author’s opinion, they are comparable to wideband drivers – they allow better alignment of characteristics but on minus add a phase shift.


             Serial electrical connection of special drivers was rare but as said used in practice with success. But it’s adaptation requires dedicated production of compatible speakers and is limited only to two bands. Using of tweeter is out due to idea of serial composition and required in such imagined situation power of tweeter. For this reason tweeter should be in parallel with condenser attached what means loosing of main advantage and we are then 50 years back. . .

            Presented system is back targeting popularization of real kind of sound which is not fatiguing or obtrusive, requires and provides extreme flat response and natural balance..

           Author would like to point that he is not involved in processes observed only in cables even they have impact in whole circuitry. He had not not observed deciding role of them for special impression of sound reality .

Standard frequency crossover wit 12dB/oct – brown color shows contra  phase operation

           Presented by author „Crossfrequency Management System” divides and applies to speakers frequencies of bands on basics of two functions: resonant filtering and inductance impedance comparison . To imagine it’s working we show it first  without coupling.


              As seen it is almost typical circuitry of known crossover where lowtoner uses 3rd level filtering m type and Middle and tweeter use its independent circuits of 2nd level. Common frequency 1,8kHz for all is explained below.

Real circuitry :

              The idea is to adopt normally rejected by one band signals to supply next band and vice verse. It is done by inductance coupling in following way: In both real ranges of passing the job, the good and transduced signal for given  band ( the screening is magnetic field) is deducted in coil L from next band increasing the selectivity while not used and phase shifted is added thanks to it’s shift. It is expected that some unwanted voltages generated by undefined resonant processes, normally resulting in apparent power, are getting loaded in side bands where are used and damped.

              So we obtain secondary mixing and secondary judging of signals primary divided by resonance LC.- this time by amplitude of field. It increases damping of filtering which is positive. The condition of this cooperation without weakening inside is to provide that LC resonance is out of range of the signals controlled by inductance – in practice must cover deeply each other and emphasize signals if coupling is null. Then by increase of coupling flat characteristic may be obtained.

             It’s job of primary is to secure the driver from not proper frequency and power instead of limiting the transmission. And that is awaited main advantage – .common signals pushed to drivers are not incorporating standard phase changes done by parallel operation. This changes are unavoidable in standard crossover filters and are resulting in sharp resonances in narrow bands. That is the problem fought now only by digital filtering. Adequate selection of LC parameters allows creation of safety barrier between this frequencies and precision magnetic inductance adjustment is done in analogue way.

              The philosophy of this approach is like double layer management – author had met similar philosophy in Intermediate Frequency circuitry of old luxury before 1940 radio receivers like Philips 753, 850, Elektrit Automatic – the selectivity was decided in two stages – one was standard double step selective amplifier with LC resonance circuitry and secondary was amplification controlled by IF signal normally not heard in speaker what resulted in hiding unpleasant band distortions during tuning between stations. It was rare solution met only in expensive receivers and required from producer very high accuracy in tuning. After stability of that tuning in time was crucial.

              Similar to that, presented system requires high accuracy in tuning to assure ideally flat characteristic and stability in time for that tuning is crucial. But in reward, not mentioning acoustic impression, the time and effort comparing to standard filtering design is much lower. It is enough to repeat settings and to keep them unchanged.

Following I present theoretical phase- amplitude function of circuitry.

Below for comparison widely used 3 way crossover theoretical phase – amplitude function.

Click to enlarge

 Wykres fazowy MATCH gotowy

Wykres fazowy m-type używany gotowy popraw.

Above I present theoretical amplitude changes in ranges of ,magnetic tuning


Photos of arrangement

Below main dimensions of acoustic system. It is transmission line with primary chamber and 4 separate resonating volumes.


Some small details







Michal Czabajski.on 2013 july 19,                          01.47 hrs

Update no1 :  2014 may 15

Update no2:   2014 june 03 – added vector graphics

Update no3:   2014 june 19 – added phase – amplitude function

Update no 4:  2014 june 23 – Description „Phase factor” in phase – amplitude function replaced with „Phase non coherence”

Update no 5:  2014 July 10  drawing „Principle of operation added” some misspelling rectified.







401 myśli nt. „M(A)TCH type crossfrequency management

  1. Sophie

    Thanks for one’s marvelous posting! I genuinely enjoyed reading it, you happen to be a great author.

    I will be sure to bookmark your blog and will eventually
    come back down the road. I want to encourage yourself to
    continue your great posts, have a nice weekend!

  2. discuss

    Excellent post however I was wanting to know if
    you could write a litte more on this subject? I’d be very thankful if you could elaborate a
    little bit further. Appreciate it!

    1. admin Autor wpisu

      Too much to say and soometime even to know ahead. To gain real sound was most complicated tech matter I was rectifing in my life. Anyway I am rather proud to say that I was able to reincarnate exactly what I heard in past which seems to be equal to build new guitar ot piano with new materials, new shape and to get excact replication of it’s precedesors timbre. At begining I didn’t believe it would be possible but it looks I developed not known before solutions to do it. In my opinion I did sound enginnering – not lodspeakers materials enginnering which by many often falsely is called by as sound enginnering. .

  3. backlinks

    Your style is unique in comparison to other folks I have read stuff from.
    I appreciate you for posting when you have the opportunity, Guess I’ll just book mark this blog.

  4. 23055

    Heya i’m for the first time here. I came across
    this board and I find It truly useful & it helped
    me out much. I hope to give something back and
    aid others like you aided me.23055

    1. admin Autor wpisu

      I don’t have rss or hyperlink. My posts are rather apparent depending if I see something not obvious and worthy to share.

  5. interesting read

    My brother recommended I would possibly like this blog.
    He was once totally right. This submit truly made my day.
    You cann’t consider simply how a lot time I had spent for this info!

  6. calgary professional painters

    I been reviewin online more than eight hours
    today for calgary professional painters & M(A)TCH type crossfrequency management ,
    yet I never found any interesting article like yours.
    It is pretty worth enough for me. In my view, if all webmasters
    and bloggers made good content as you did, the net will be a lot more useful than ever before.

  7. watch movies no ads online

    Do you mind if I quote a few of your posts as long as I provide credit and sources back to your weblog?
    My website is in the very same area of interest as
    yours and my users would definitely benefit from some of the information you present here.
    Please let me know if this ok with you. Thanks a lot!

  8. Forest

    Meine Coder auf überzeugen versucht, mir zu .net von PHP zzu
    bewegen. Icch waar schon immer mochte die Idee,
    weil der Kosten Kosten. Aberr er ist tryiong nichtsdestoweniger.
    Ich habe mit Movable-Typ um mehreren verschiedenen Websiters für etwa ein Jahr und bin ängstlich besorgt über die Umstellung auf eine andere Plattform.

    Dinge über blogengine.net Ich habe sehr gut gehört.
    Giibt es eine Möglichkeit, icch kann import allke meine WordPress Beiträge hinein?
    Jede Art von Hilfe wäre wirklich sehr geschätzt!

  9. check it out

    We are a gaggle of volunteers and opening a brand new scheme in our community.
    Your website offered us with helpful info to work on.
    You’ve performed a formidable process and our
    entire group shall be grateful to you.

  10. check it out

    Excellent blog here! Additionally your website loads up very fast!
    What host are you the usage of? Can I get your associate
    hyperlink for your host? I desire my website loaded up as quickly as yours lol

  11. paket wisata jogja murah

    Hey there just wanted to give you a brief heads up and let you know
    a few of the images aren’t loading properly. I’m
    not sure why but I think its a linking issue.

    I’ve tried it in two different internet browsers and both show the same outcome.

  12. cheap ncaa jerseys

    Hello there, I found your website via Google at the same time as searching for
    a related topic, your website came up, it looks great. I’ve
    bookmarked it in my google bookmarks.
    Hi there, just was aware of your blog through Google,
    and found that it’s truly informative. I’m going to be careful for brussels.
    I’ll be grateful in case you proceed this in future.
    Numerous other folks shall be benefited out of your writing.
    Cheers!cheap ncaa jerseys

  13. read me

    I’m not that much of a online reader to be honest but your blogs really
    nice, keep it up! I’ll go ahead and bookmark your website to come back later.
    All the best


Dodaj komentarz

Twój adres e-mail nie zostanie opublikowany. Pola, których wypełnienie jest wymagane, są oznaczone symbolem *

Możesz użyć następujących tagów oraz atrybutów HTML-a: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>