Anyone Know the fuse size in the Joule- Electra VZN100 and LA-300 pre amp


Guys just picked up a set of late MK4 VZN-100 and the LA-300 ME pre- I want to order the syn. black fuses for the units as I have had great success using them in the past-Since both the amps and pre are being shipped now I would like to order the black fuses ahead of time-
Also can anyone comment on whether it is worth while to upgrade the pre to Platinum status and what the dif in sound might be and also what cables you are using-
thks in advance-


fluffers
thks tried rich - he does not remember- he is going to do the mods if I decide to go that way- just not sure how much of a dif. it makes- thks
Don't the fuses in the amp and preamp have values stamped into the metal end casings?
Don't the fuses in the amp and preamp have values stamped into the metal end casings?
I would assume so, but the OP does not have the amps yet and wants to pre-order the fuses an advance of the delivery of his amps.
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If the equipment is new I would check with the manufacture to make sure the manufacture’s warranty will not be voided if the OEM fuses are replaced by the syn black fuses. 

The equipment can't be new, as Joule Electra went out of business a few years ago. Obviously can't check with the manufacturer either, because they are out of business.