Navison Audio SE-MKII Owner's Operating Manual - Vacuum Tube Replacement
Vacuum Tube Replacement
The SE-MKII circuit employs eight vacuum tubes (V1 – V8), all 6H1-EB tubes. The 6H1-EB offers
low noise, low microphonics. The brands of tubes we supply have been chosen by first selecting
those brands which are known to be most reliable, then by extensive auditioning of these
acceptable brands with the final choices being made solely on the basis of sonic performance.
We know of no vacuum tubes available which will improve the sonic performance of your SE-
MKII. The tubes in your preamplifier have been tempered by a controlled burn-in procedure that
permits them to perform for a greatly extended period without sonic degradation, and then
selected for minimum residual noise. Replacement tubes are prepared and selected in the same
way. Therefore, we highly recommend that you purchase replacement tube sets from Navison
audio design.
We anticipate tube life to accommodate two to three years of operation without degradation in
normal use - if the preamplifier is switched off when not in use. If the preamplifier is left on at
all times, tube life can be exhausted in a matter of a few months.
SE-MKII Owner’s Manual
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