6X4 NOS original boxes

23) GE

21) Sylvania

16) RCA

2) Westinghouse

2) CBS

3) GB-6X4WA Sylvania Gold Brand

1) Coronado by GE

1) Coronado by Tungsol

2) Tungsol

2) ITT Japan

3) Raytheon

1) AMC by GE

Recommended for

Granite Audio 770 preamp

Audio Note DAC 1.2

LAMM LP2 phono

KONDO KSL M7 preamp
Kondo M77 preamp
Eastern Electric Minimax Phono

Pultec EQ

Wright WPP200C
Audio Note M7

Shindo