Electro Harmonix

2 tubes, matched as pair

A new geometry is utilized to reduce odd order harmonics for a sweet top end while the peak power is extended to improve low frequency response. Our new glass formula body ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

Single tube, not matched

A new geometry is utilized to reduce odd order harmonics for a sweet top end while the peak power is extended to improve low frequency response. Our new glass formula body ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

2 tubes, matched as pair

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.

4 tubes, matched as quad

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.

Single tube, not matched

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.