Shop › 6SN7 Pre Amplifier Image 1 of 11 Image 2 of 11 Image 3 of 11 Image 4 of 11 Image 5 of 11 Image 6 of 11 Image 7 of 11 Image 8 of 11 Image 9 of 11 Image 10 of 11 Image 11 of 11 6SN7 Pre Amplifier $2,799.00 3 × 6SN7 tubes, 4 line level inputs, 1 pair of RCA outputs, remote control. Add To Cart Added! 3 × 6SN7 tubes, 4 line level inputs, 1 pair of RCA outputs, remote control.