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Power amplifiers
M1.2 Reference
description  specs
description  specs
1 description 1 specs
ML3 Signature
1 description  1 specs
     description specs
LL1.1 Signature
1 description 1 specs
L2 Reference
description  specs
LP1 Signature
1 description 1 specs
LP2.1 (regular/deluxe)
                phono preamp
    1 description   1 specs

What substitution tube types
do you recommend for the 



417A: 5842, 5842WA, 5842Q

6X4: 6X4W, 6X4WA, 6202, EZ90, CV4005, CV493


We do not supply Western Electric tubes with the LP2 because they are very expensive (each tube can run anywhere from
US $40 to $80) and are not ready available.   Our choice to supply 5842 tube with the LP2 was originally made because it is an industrial version of the WE tube, and their parameters are identical.  The WE tubes can be purchased through tube suppliers; we have only a few pieces in stock for reference purposes.

The issue with the WE and 5842 is that there is a certain percentage of them that exhibit microphonic effect and other unacceptable behavior in audio application.  Therefore, we purchase large quantities of 5842 tubes and test each tube to make sure it is quiet; the rest are discarded.  If we were to supply the LP2 with a set of WE tubes, we would need to have at least 10 tubes on hand in order to make a selection of 4 that are acceptable.  This would be expensive -- between $400-$800 just to select one set of tubes.

If some of our customers want to use original WE 417A tubes, they buy them personally through the internet or tube suppliers, and then experiment with the tubes themselves.