10-21-08: Cyclonicman
...eventually you will have to replace the tubes which can hit the $1,000 range
for excellent quality tubes.
The Reference 3 uses five 6H30P tubes and one 6550C tube. Five 6H30P tubes
cost $150, and one 6550C tube costs $80...for a total of $230.
There are more expensive versions of these tube types available, but reading
these forums reveals that the results are mixed insofar as using the more
expensive NOS tubes produces marginal improvement, if any. Many users
believe using the less expensive tubes supplied, and recommended, by ARC is
best.
So, it seems that with the ARC Ref 3, one need not be too concerned with the
cost of re-tubing the preamp.

