Power Amplifier Tubes - RUBY TUBES are designed for rich sound, long lasting, outstanding performance.  6L6GCMSTR-MP Matched Pair  List $38.50 Our Price! $29.99 pair Qty  6L6GCMSTR-MQ Quad Pack   List $77.00 Our Price! $49.99 quad. Qty  EL84CZ - MP Matched Pair  List $25.90 Our Price! $19.99 pair Qty  EL84CZ - MQ Quad Pack   List $51.80 Our Price! $34.99 quad. Qty EL34BSTR-MP  Matched Pair   List $38.50 Our Price! $29.99 pair Qty  EL34BSTR-MQ Quad Pack   List $77.00 Our Price! $54.99 quad. Qty Preamp Tubes - RUBY TUBES are designed for rich sound, long lasting, outstanding performance.  7025SS List $13.25 Our Price! $10.95 ea. Qty  12AX7AC5 List $13.25 Our Price! $10.95ea. Qty

* All Ruby Tubes are carefully tested and matched. Matching is done by both plate current and tranconductance. Each tube is marked with plate current and transconductance for that tube and a matched pair quartet will have tubes that tested the same.

RUBY TUBES come with a 6-month warranty, one of the best in the industry. We are so careful about selecting and testeing our tubes that we have no problem making this kind of offer. If one of our RUBY TUBES failes during the warranty period, RUBY TUBES will replace it at no charge.