Thomas the new reissues New Sensor - Mullard ECC83/12AX7 and CV4024/12AT7 tubes in my MC275 amp provided another layer of details. However, my Black Sable - Mullards ECC83/12AX7 in my C500T preamp made the most sonic improvement...and they were the most expensive!
Later this year I will revisit NOS 12AX7 types that improves midrange and bass.
On a different subject, changing the fuses in the MC275 also improved the sonics.
Later this year I will revisit NOS 12AX7 types that improves midrange and bass.
On a different subject, changing the fuses in the MC275 also improved the sonics.