SHOP › 6SN7 Pre Amplifier Image 1 of 9 Image 2 of 9 Image 3 of 9 Image 4 of 9 Image 5 of 9 Image 6 of 9 Image 7 of 9 Image 8 of 9 Image 9 of 9 6SN7 Pre Amplifier $2,799.00 3 × 6SN7 tubes, 4 line level inputs, 2 pairs of RCA outputs, remote control for volume. Hand built in the USA. Add To Cart Added! 3 × 6SN7 tubes, 4 line level inputs, 2 pairs of RCA outputs, remote control for volume. Hand built in the USA.