※ Brand new, unused, 2 tubes These were kept as spares. The ELECTRO-HARMONIX / 12AX7EH is a Russian-made preamp tube boasting exceptional tonal balance. Considered high-quality among currently produced preamp tubes, it utilizes a spiral filament for hum cancellation and low noise. It has a characteristic low-mid range, but its overall balanced sound is appealing. ■ Reference ↓ https://www.soundhouse.co.jp/products/detail/item/31543/?gad_source=1&gad_campaignid=17414037480&gclid=Cj0KCQjwm93DBhD_ARIsADR_DjFP-nJqa7c5nwcno6UqUBX-o67SNWtLuE_5z1BdIcHo7DiLjJ9615saAncSEALw_wcB