6DJ8/6922 Selection Guide

6DJ8 Description

6DJ8 was originally intended for RF cascode amplifier. The design targeted low noise, high conductance (gm), high mu and low internal resistance (rp).

In recent years, audio manufacturers realized this combination makes it perfect for audio application. We now have a wide variety of HiFi tube equipments with 6DJ8 type tubes on the market today.

6DJ8 family of tubes

Here are different numbers you see on 6DJ8 type tubes.

ECC88 is European numbering for 6DJ8.
6922 is premium 6DJ8 type. E88CC is the European numbering for 6922.
6922 is slightly different, but is plug-in compatible with 6DJ8/ECC88 for all intent and purposes in audio gear.
Note: All of the 6DJ8/6922/ECC88/E88CC we carry are plug-in compatible where 6DJ8/6922 is called for.
6N23P is the Russian 6922 and is also compatible with 6DJ8/6922. Electro-Harmonix 6922EH is derived from this 6N23P. The 6N23P family of tubes have relatively low microphony and noise. 6922EH is by far the best when it comes to low noise, and is recommended for phono or preamp application.
PCC88/7DJ8 has different heater, but close enough to make an excellent sub. They sound as good as their NOS 6DJ8 counterparts but at a lower price.
Russian 6N1P is similar to 6DJ8 and noted for being very linear. It can sub for 6DJ8, but check with your manufacturer first. 6N1P is sold under different brands, but they are made only by Voskhod factory in Russia with the Flying Rocket logo.

6DJ8 Selection Guide

For line stage and CD Player application where gain is low, any of the current production 6DJ8/6922, as well as NOS 6DJ8/6922 and even PCC88 tubes will work well.
In high gain application like phono or preamp, microphonics and noise become an issue.
Note that microphonics tends to be a problem for all 6DJ8 type tubes, including super expensive NOS 6DJ8 type tubes. The only exception is Electro-Harmonix 6922EH. If you intend to use 6DJ8/6922 in microphonic-sensitive application like phono stage, we recommend 6922EH.