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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: Here is where Melquiades pays off.Posted by Romy the Cat on: 1/17/2011
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Since I got my stable and good quality electricity back I recalibrated my bass horn. Again, I set it up with very precisely and absolutely without any measurements, juts by ear, to sound exactly how I want it to sound. This is in a way my crown jewel accomplishment as the way how my midbass horn sound how is in my view an absolutely a new word in midbass horns implementations. I am not trying to suck my own dick, I just admit the fact the that way how my midbass channel sound I did not hear anywhere sound, regardless if it was horn or not.
My playback feels like has no midbass. There is absolutely no midbass impressiveness of any kind, in fact it more like a deficiency of midbass. Then, suddenly what music calls upon midbass notes of midbass harmonics then it unexpectedly show up from nowhere like a ghost and then evaporates to nowhere. There is no sight of any “horn” or “not horn” there is no question about fidelity of this midbass – it just so organically indispensable from the sound of the whole room that it truly fantastic.
I do not know what made the midbass sound so great – is it horn? Is it dynamics? Is it driver? But I do know that this super precisely calibration of this midbass was possible because the way how the Melquiades was build. The Melquiades’ bass channel is highly overbuilt. The 1.5A power transformer, half ampere input chokes; 30.000uF in the filtering caps, the output transformer is gaped at 450mA with inductance enough to do 7.5Hz at FULL power. I drive my 6C18C (similar to 6C33C) at 195V and I pretty much was setting the gain of my midbass channel by adjusting current of my 6C18C. From 35W to 50W at plate I have ~ 1.5dB difference and perhaps 100R or output impedance. In the very end I locked everything at 195V and 285mA, that give 55,6W on plate. I absolutely love the result and I intend do not proceed with any faster core bass transformer.
With this result I officially declared the midbass project is over. I truly gratified with result and I am not kidding: the result did extend my vision of what is possible. I do have my ego trip about the fact that it was done by me as no one in the world knows that it was done by my carpenter.
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