Make Your Good Amp Great
The SELECT Collection boosts your amp noticeably. These tubes bring out better sound, even in beginner models. Each tube is handpicked by our engineers for clarity, texture, and detail. Your music will sound more real, emotional, and precise.
The SELECT Vacuum Tube Difference
The SELECT tubes come from the same batches as our CORE Collection. They stand out for one reason: expert judgment. Our engineers evaluate each tube for sound profile, dynamics, microphonics, gain, conductance, noise, and overall performance. This careful selection ensures only the best tubes make it into the SELECT Collection.
12-Month Warranty
We trust our product. We offer a 12-month warranty on our vacuum tubes. This warranty covers any manufacturing defects.
Technical Specifications
Tube Type: 12AX7 / ECC83 / CV4004
Tube Socket: 9-pin
Max Anode Dissipation Power: 1 W
Max Screen Dissipation Power: N/A
Output Power in Class A1 Amp (Single Tube): N/A
Output Power in Class AB1 Amp: N/A
Max Anode Voltage: 300 V
Max Screen Voltage: N/A
Max Grid Voltage: ~50 V
Heater Voltage: 6.3 V
Heater Current: 0.3 A
Transconductance: 1.6 mA/V|
Amplification Factor: 100
Internal Resistance: 62.5 kΩ
Package Contents
Pair of matched vacuum tubes or single vacuum tube
User handbook featuring burn-in guidelines
Certificate of authenticity and warranty
