What tubes should I buy?

Not all tubes are suitable for use in our products. If in doubt, please check with us. Our website features replacement tubes, please consult it. Some double triode models which are available on the market can be asymmetric instead of symmetrical so be careful. Also do not always but the cheapest valves as these probably won't give you the best audio performance, and since they last a long time in your unit why listen to a sub-standard product for an extended period of time.