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In the Forum: Melquiades Amplifier
In the Thread: Entry level DSET Melq?
Post Subject: Vitavox s2/amphorous core interaction/idiosyncraciesPosted by mark on: 1/26/2008
well i never thought i would be opening such a pandora's box with this combination.firstly,the drivers have the plastic surrounds(whew,lucky!i know the diaphragms are potentially harder to source than the drivers)what indicators or criteria would make my particular drivers more or less amicable with amphorous cores?(with reduced inductance only?)is it strictly an issue of varied lots of alnico used throughout  decades of production?and what about the magnetic flux level of these vintage alnico drivers??? i just had an altec 288c come  from great plains audio(good guys) and was pleasantly surprised to find out that they routinely check all alnico magnets with a high quality tester.i hear that some may need recharge. have you done this with your s2's?or can you do this by ear?in reference to the potentially venomous output of the s2 is this only for mf or fundamentals as well.with regards to aligning s2 diaphragms,the altecs have locater pins and are not adjustable.i suppose the s2 does not have these.how do you adjust these; roughly by eye and then finely by ear?details?as you know my plan is to source fane studio 8m use the s2 from 550hz to 12khz.i want to focus on these 2 drivers to start.it is interesting that spectral plot i saw on your site of a classical piece that shows the concentration of energy 80hz-8khz.and last i remember reading about the problems with s2 in midrange which i believe is what motivated you to split the 550hz-12khz between 2 s2s,would you mind elaborating on that topic?once again thanks for sharing this interesting experience

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