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- Apr 12, 2012
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Agree with Audiofanboy, I would not get the upgrade tubes from LD.
Respective the choice of upgrade tubes, it all depends on the brightness of your headphone. If it is as relaxed as the HD650, the 6H30P or 6H30P-EV power tubes + CV4015 could be just what you want. I am not sure - but I think I've read the Beyerdynamic DT1350 is not exactly that relaxed. If this is the case you may want to consider a pair that fits better otherwise the sound might get too bright. For example 6H30P (-EV) with Mullard M8100 or Tung Sol 6AJ5. Another pair would be based on the CV 4015s, then paired with with 6N6P-IR (my favourite) or nice 6N6P. What I would not suggest to do is just to fit the driver tube to the power tube, but rather the other way round. The 6H30P tubes sound great, are regarded high and they are expensive. So you kind of want to keep them. But, I personally think the CV4015 is the upgrade to do and then I would fit the power tube to it. If you first get the CV4015 only, you can find out whether you like the sound. I would take it from there.
Respective the choice of upgrade tubes, it all depends on the brightness of your headphone. If it is as relaxed as the HD650, the 6H30P or 6H30P-EV power tubes + CV4015 could be just what you want. I am not sure - but I think I've read the Beyerdynamic DT1350 is not exactly that relaxed. If this is the case you may want to consider a pair that fits better otherwise the sound might get too bright. For example 6H30P (-EV) with Mullard M8100 or Tung Sol 6AJ5. Another pair would be based on the CV 4015s, then paired with with 6N6P-IR (my favourite) or nice 6N6P. What I would not suggest to do is just to fit the driver tube to the power tube, but rather the other way round. The 6H30P tubes sound great, are regarded high and they are expensive. So you kind of want to keep them. But, I personally think the CV4015 is the upgrade to do and then I would fit the power tube to it. If you first get the CV4015 only, you can find out whether you like the sound. I would take it from there.