GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: To Milq builders: corrections, simplification, modifications.

Post Subject: Talking about amp….Posted by Romy the Cat on: 1/13/2015

Darren, I understand what you say. I would like your confession about acoustic system with any comment as this is amp thread and I would like to be on more or less on the subject of the thread.

I do not know the 285GMF driver but it is very common for the bass drivers with cupper cap to have a situation what the filter coil "talks" with instanced of voice coil and the filter become less effective, letting the driver to shot-through much more then you would like it to. Well, by-amping is certainly help in this situation of going for subtractive filters where no serial coil is use but rather a parallel cap.

I do not have any allergy to the amorphous-core OPT's in the high range and I do not think you do. What you describe sounds to me not amorphous-core contribution but rather the evidence that you do not load your OPT properly. Make a simple experiment. While your amorphous-core OPT produce overly raw sound take a 4 resistor of a few watts and short the secondary of your OPT, or your speaker driver terminal. By doing it you will lower the impedance of your speaker and will load the output stages with that amorphous-core OPT much harder. You will have many thing different changed in sound but then you will also will instance see that this "overly freshness" that you do not like will be gone. You then might remap your transformer and keep using it. Be advised that as you load your output stage the gain of your amp will rise as well.

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