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Tax wrote:

Your post has had the desired effect and I am doing some more research into Fane Studio 8M, 16 Ohm drivers in a 4 inch throated horn tuned to 115Hz with the intention of crossing it from 70Hz to 500Hz . This may be similar to what is used in the Trio. No further response on your part is necessary.

Tax, I do think that response is necessary, not response but some farther commentary. My commentary will be much wider than your specific case but it is what I do.

Why do you think that Trio-like horn would address  the problems that you feel you experience. Because some kind of Moron on line told you so? Because you heard Trio and you fell that they were better in the field where you feel Duo has deficiency. Why do you think that when you heard Trio, if you did, then it was not just a better amplifier? Do not forget that 3 days ago you were planning to try another amp to solve your problems; today you are planning to build 115Hz horn.

What I am trying to say is that is that the things need to have a proper COGNITIVE ORDER OF SUCCESSION. Pay attention that I do not question your mentality and I absolutely confident that in any other situation, not audio related, you will demonstrate a proper cognitive order of succession without need to have my stupid commentary. In any conversation with your doctor, air-conditioning technician, car mechanic, in any other filed you will recognize reasons, methods and results and will navigate the further execution upon the worth of the reasons, tall of the methods and value of the results. Why we allow out actions on audio to be absolutely not subordinated to that very common and normal human behavior?

Tax, I do not knock in your door I just use your example as an illustration. Your case did attracted me by the fact that you did identify the area of frustration you just did not know the specific reason for the frustration. Somebody pitched you a notion of upperbass deficiency in Duo and you are committing yourself to build upperbass horn. If you have problem with your vision on left eye and your doctor inform you that he would like to amputate your leg then will it raise your interest to spend some time on study and test your doctor’s observation before you go under knife? In audio everything is simple and everything is buildable – so why do build and buy anything, like sexual frustrated women do clothing shopping, only not what we need to build to address out very sissify and well-formed demands to sound of our audio?

Anyhow, Tax, if you care that here is what I would like you to do. Do not build anything. You do not know yet that your 115Hz horn will be a major fuck up for your entire system. It sounds like you have many amps lying around you. That is good. Take one/pair of the amps, connect it to ANY loudspeaker. Put the loudspeaker in time-alignment with Duo’s MF and let to call it your upperbass. Put in this upperbass a band of 80Hz to let say 500Hz. You were planning to build Milq so you shall be familiar with basis electronics. If I you I would use some kind of small monitor with tweeter disconnected or taped out. Try to play with crossover at the channel and the crossover at the upper knee of your Duo’s subwoofer to shape the sound that would feel the gap of your frustrations with your sound. A tip: if you are trained and comfortable to hear mono then it is much simpler to do all of it just with one channel.

The exercise has multiple proposes including the one that practically no audio Morons out there “get” and the one that is very much a foundation of my audio believes: We hear only Sound that we understand. So, modeling your upperbass you will be able to define your own understanding of function and contributive values of upperbass region in the sound of your playback. Trust me, after getting this understanding you will not need to listen any cretins from Internet and you will have own sense of direction and actions in administers the need of your playback.

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