I've used them with Sophia Electric 6sn7 in a ModWright LS100 preamp. See my other classified for the 6sn7. I'll give a good deal for some one buying the 6sn7 and 5AR4. I've put around 400 hours on them.
Asking SOLD. Please add 3% for paypal or use friend/family option. Buyer pays shipping.
