The tubes are not special, the way they are measured and matched by Roger is, and they happen to be very good tubes, the Eis that is. That being said, I suspect you would do fine with a set of tubes matched by Jim McShane, or Andy at Vintage Tube Services for NOS. I stick with Roger's tubes because nobody matches better, and he voiced the amp around his tube - keeps tube neurosis from setting in:)
12AX7 tubes for Music Reference RM-10
I looking to replace the 12AX7 tubes in RM-10 amp. Looking at the manual it says something about "V1" being grade AB and "V2" being BA. Below is a quote from them:
" Note that V1 is a RAM grade AB (section 1 selected for low noise) and V2 is grade BA (section 2 low noise). It is essential to have a grade A section as the first amplifier to achieve the very low noise of which the RM-10 is capable."
The question is: do I need some type of special 12AX7 tube? Do they have to be matched? Balanced? etc...
Any feedback will be greatly appreciated, thanks in adavance to everyone.
" Note that V1 is a RAM grade AB (section 1 selected for low noise) and V2 is grade BA (section 2 low noise). It is essential to have a grade A section as the first amplifier to achieve the very low noise of which the RM-10 is capable."
The question is: do I need some type of special 12AX7 tube? Do they have to be matched? Balanced? etc...
Any feedback will be greatly appreciated, thanks in adavance to everyone.
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- 14 posts total
- 14 posts total