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jessie.dazzle wrote:

I completely agree, and will use the driver that sounds best with a 40Hz exponential horn. I have both versions of this driver, and have listened to them both in an A/B situation, out of the horn; I remember noting the main difference was in dB (output level)

It shall be 3 db different between them if one of them 8R and another 16R (OK, 15R but let it call 16R for the sake of convenience.) The twice higher impedance will load the out tube of your ML2 twice lighter and you will lose 3 dB. Many of SET, including the ML2 have multiple taps for different load. Thos taps have 3dB spread and you might use them to compensate the loosing of 3dB.

My view on this is different and I do not care about the dB gain or loosing, not about power but rather about to get desirable harmonic loading. Move from 8R driver to 16R driver will idle the tube more and will make the sound of the driver different. In case of your Lamm ML2 it might be less critical as ML2 uses global negative feedback and has relatively low output impedance. Still I remember it was very auditable when I was experimenting with Fane Studio 8 of 8R and 16R. I had both and most of those drivers come as 8R. I remember the custom party I ordered from Fane was 16R version. With Milq, as it use no feedback, the sonic different between 16R and 8R is more noticeable.

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