JJ 12AX7 ECC83S Preamp Tube

The JJ 12AX7 ECC83S preamp tube is one of the most common preamp tubes in modern and vintage guitar amps alike. These JJ 12AX7 tubes are immediately discernible from other 12AX7. They have a construction that is similar to a frame-grid tube. This construction makes them very rugged and reliable. They are also priced very competitively which makes them great value for money.

Why choose the JJ 12AX7 ECC83S Preamp Tube?

This is one of the best new 12AX7 tubes (ECC83S) for any guitar amp. It is very musical – rich with great harmonics. An excellent tube in all Marshall amps in the three preamp positions.

The JJ 12AX7 tubes are one of the most popular choices of preamp tubes, and with good reason. The 12AX7 tubes are also known as ECC83S, but they are the same tube – 12AX7 is the US name, and ECC83 is the European name.

12AX7 tubes are high gain with a typical amplification factor of 100. This is why you will typically find 12AX7 tubes in most guitar amplifiers, so that the highest amplication of the signal can be provided. This can be compared to 12AT7 tubes (ECC81) which have an amplification factor of 60, and can be more commonly found in cleaner sounding amplifiers such as Fenders.

12AX7 tubes will be found in just about every modern amp, and can range from 1 x 12AX7 in smaller 5 watt amps, all the way through up to 6 x 12AX7 in the one amp for high gain metal and true mutli-channel amps. That many 12AX7 in one amp can give you some serious gain and amplification!

Can you swap other tubes for 12AX7’s? You can, and more details on that can be found here.

For more technical information, check the JJ 12AX7 ECC83S datasheet.

You can also browse our selection of 12AX7 tubes.