12AX7 Tube Reviews

Reviews performed with a Mesa Boogie Mark IV thru 2x12 Celestion speakers with SED 6L6GC power tubes. Tubes were listened to with both clean tone and overdrive channels using a US made 1993 Fender Strat.

EH 12AX7
  • Electro-Harmonix 12AX7 EH Preamp Vacuum Tube
- The spiral wound filament makes this a very quiet tube, perfect for modern high-gain. Crispy highs and great frequency response throughout the spectrum. All around great choice for all styles of music.

JJ / Tesla ECC83
  • JJ ECC83s / 12AX7 Preamp Vacuum Tube
- great for vintage amps and clean tone players. A flat response that doesn’t drastically affect any one frequency.

JJ / Tesla ECC803s ‘high gain’
  • JJ ECC803s / Hi-Performance 12AX7 Preamp Vacuum Tube
- Hotter and fatter than the regular JJ, this tube gives more headroom once in the circuit. Creamy tones and great low end.

Sino 12AX7
  • Sino 12AX7B Preamp Vacuum Tube
- good tone at an affordable price.

Sovtek 12AX7 Versions

12AX7WA / 7025
  • Sovtek 12AX7WA Preamp Vacuum Tube
- lower gain than other 12AX7s. Flat response and saturated overdrive.
  • Sovtek 12AX7WC Preamp Vacuum Tube
- a little more headroom than the Sovtek 12AX7WA.
  • Sovtek 12AX7LPS Preamp Vacuum Tube
- spiral wound filament for extra quiet performance, recommended for modern, hi-gain amps. This is our favorite Sovtek 12AX7 with maximum output.

Tung-Sol 12AX7 new production
  • Tung-Sol 12AX7 New Production Preamp Vacuum Tube
- Beefy, clean and quiet. clean mid and treble response with plenty of headroom. Lush overtones, especially when overdriven.

  • GE 12AX7A
- very quiet and tame medium gain tube. These were very well constructed back in the day and will provide hours and hours of vintage tone.

Sylvania 12AX7 NOS
  • 12AX7A / ECC83 (Other US)
- Old-school warmth and tone with an affordable price...“Its like butta baby!”

  • 12AX7A / ECC83 (RCA)
- Great gain, perfect clarity and frequency response. Awesome! Our favorite American NOS 12AX7.

Telefunken Smooth Plate ECC83
  • Telefunken ECC83 / 12AX7 Smooth Plate
- Premium quality performance in every way. Quiet tone exuberance for every setting.