@ieales, thanks for finding the exact Forum to which I was referring. My six month estimate turns out to have actually been almost a year!
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Actually, after looking at the Harmon Kardon Citation 1 pre-amp, I noticed that all of the EQ that was mentioned about it pertained to phono, not tone controls. Yes, there are tone controls, but that is all they are. The adjustment is not flexible except for the plus and minus positions. I would rather have a tone control that can be set to a particular frequency... in fact, once the unit was at my house, maybe then I could determine those needed frequencies and change out capacitors/resistors to adjust to the needed frequency. Or, to get a bit fancier, as i mentioned before, there could be two or three choices, per a switch to choose which turnover frequency that you would want to use. Much better than a 33 band EQ in my opinion, and in some cases even a parametric EQ.
@4krow I believe most of the Japanese integrated amps have tone controls: Luxman, Accuphase and the newer Yamahas. I am a fan personally, my vintage Kenwood sounds so good. There is definitely something undeniably cool about switches, knobs and levers. All this purist approach is fine and good, but its also boring as hell.
But other than possible tube noise floor raising...is the actual sound likely to alter in any way as tubes age?Yes. If their transconductance falls below the minimum values, the performance will suffer and can affect things like bandwidth, distortion and dynamic qualities. In a nutshell, can sound 'sleepy'.
Much better than a 33 band EQ in my opinion, and in some cases even a parametric EQ.@4krow
Its **very** tricky to build a 33 band EQ that doesn't mess up the sound! Even a 10-band is challenging. Parametrics have a lot in common with the filters used in analog synthesizers- they are pretty complex circuit-wise and so they are going to have a sonic footprint even when set to flat.
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