Linlai E 6sn7 tubes

I have 2 pair KR VT-231 Black glass and 2 pair VT-231 clear glass. The last time I called Andy at VTS, a pair of black glass was $400. So I bought the clear glass for about $200.

I swear the BG have better bass than the clear, but Andy said that's not true. Outstanding tubes.

@lowrider From what I have read, some do say black KRs have better bass. Great to hear these are outstanding tubes though. I recall you do have the Sylvanias too. Do you rate the KRs better? Tks for your impressions.

@ram18 -

     Those are the ones.

     The CKR, bottom-gettering and copper rods (at the top), are a dead giveaway.

      Be very careful about obtaining tubes rigorously tested/guaranteed for low noise, if they're going in a preamp.

@rodman99999  Tks. Glad to hear they are the same. These tubes are going to be plugged into my preamp. Not sure to have it at the gains or buffer stage yet. Tks for alerting on the testing part. Am new to tune rolling, so will be relying on my dealer to do the testing.

+1 Rodman for noise testing.