Medallions VS. Non- Medallions? - diyAudio
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Old 8th April 2012, 12:19 AM   #1
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Default Medallions VS. Non- Medallions?

With regard to Acoustat 2+2's with the Medallion modification, minus the Medallion transformers themselves

Using a new toy, (Dayton Omni-Mic) I find a 3-5db. dip at 2khz. This dip is surprisingly solid and and doesn't shift away from it's 2khz. position.
Granted I'm new to this instrument and its learning curve, and I understand reasonable expectations and accuracy in a $400.00 audio measuring device...
That said, could this be attributed to the difference in the transformers? There is often discussion of the difference but it's seldom in detail and seems to be confined to the higher frequencies and the high pass transformer.
In all honesty, they sound great ... but the dip doesn't alter without radically moving the speakers to unlistenable positions , flattening the dip but ruining the remainder of the spectrum.

Whatcha think?
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Old 9th April 2012, 09:49 PM   #2
DaveG is offline DaveG  United States
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"with the Medallion modification, minus the Medallion transformers themselves"

this is interesting, but could you please clarify or are you referring to the "C" modifications?
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Old 9th April 2012, 11:00 PM   #3
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Well put. The mod is often termed the "C" modification and I think it originated with the introduction of the Medallion transformers.
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Old 10th April 2012, 01:00 AM   #4
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Location: Chandler Arizona
The C-Modification actually came a little after the Medallion Transformers were introduced, much to the consternation of those customers who had just sent their interfaces back to the factory for the transformer upgrade.

The C-Mod can be done to any MK121-series interface, whether they have Medallions or not. The benefits are still there. I doubt that your combination of the C-Mod with original transformers is responsible for your measured dip.

And in regards to that measured dip, there is nothing like measuring a set of speakers to ruin all the fun and pleasure of owning them. When it comes to my own listening room, my ears are my only guide. If my ears are happy, the rest of me is happy, and I don't WANT to know how they measure. Now, if you are hearing that dip and it bothers you, that is another matter. I suggest you check your implementation of the C-Mod, because an error in wiring or component value could cause anomolies in that frequency range.
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