Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › What is the difference between 6922, ECC88, and E88CC tubes?
New Posts  All Forums:Forum Nav:

What is the difference between 6922, ECC88, and E88CC tubes?

post #1 of 23
Thread Starter 
Particularly the last two. Which are compatible with 6922 tubes? If I had an amp that took 6922, is it ok if I filled it with ECC88? What if I filled it with E88CC? What about a mix of 6922, ECC88, and E88CC?

Thanks in advance.
post #2 of 23
Are you talking about the tubes the earmax pro uses and also the rudistor rp5 reference????? They are quite common tubes to get hold of. Did you get an earmax in the end????
post #3 of 23
These are all direct substitutes, but if there is a pair, I would keep them the same type and manufacturer for each channel. FYI, 6DJ8, 7308 and CCa are also direct substitutes for 6922.
post #4 of 23
Thread Starter 
Yup, talking about the tubes the Earmax uses (I think). I didn't end up getting one. I ended up getting something better....

I have to start getting new tubes to roll.
post #5 of 23
Quote:
Originally Posted by sygyzy
Yup, talking about the tubes the Earmax uses (I think). I didn't end up getting one. I ended up getting something better....

I have to start getting new tubes to roll.
So what did you get in the end?????
post #6 of 23
The 6922 is a substitute for the 6dj8. But the 6dj8 cant take the voltage the 6922 can. Using a 6dj8 in a circuit designed for a 6922 will be problematic.
post #7 of 23
The E88CC is a substitute for the 6922. The ECC88 is a substitute for the 6DJ8. The 6922 has a max voltage of 220 volts. The 6DJ8 has a max voltage of 120-130 volts. You can put a 6922 in a 6dj8 circuit but not the other way around.
post #8 of 23
Thread Starter 
Quote:
Originally Posted by GoRedwings19
So what did you get in the end?????
You'll see...or maybe you already have. MUHAHAHA,
post #9 of 23
Here's the skinny.

6DJ8 is the "baseline" version of this tube type. The 6922 is the improved version designed to lower microphonics and improve life span. The 6922 also is rated for a higher voltage. 6922 can be used interchangably in 6DJ8 gear. However, while in most applications it isn't a problem, the 6DJ8 isn't always usable in 6922 applications.

ECC88 is the European designation for 6DJ8. E88CC is the European designation for 6922. You'd think they could've differentiated the letters a little more to make it less confusing CV2492 is the military designation for 6922 (used by Mullard, most notably).

7308, E188CC, and CCa are yet other super premium versions of the standard 6DJ8. These were built to tighter tolerances and are very rare (and expensive).
post #10 of 23

This might be helpful

Check out this excellent article and in depth review of all 6DJ8 family tubes on Audio Asylum:

Joe's Tube Lore
post #11 of 23
Quote:
Originally Posted by gundam91
Check out this excellent article and in depth review of all 6DJ8 family tubes on Audio Asylum:

Joe's Tube Lore
Thats a great article; thanks!
post #12 of 23

Joe's Tube Lore

I have tested over dozens of various vintages/brands of these types of tubes in my preamp (because it only takes one) and find my results to be fairly consistent with JoeS'.

But they are very system dependent. I have not found Telefunkens to sound good in my system.
post #13 of 23
Thread Starter 
Thanks everyone for your help.

So I found out the tubes will be receiving 110-120V.

In that case, am I correct in understanding that I can use ANY of the tubes aforementioned? What would the cons, if any, be of using a higher rated tube (ie 6922) in an amp that is a lower voltage?
post #14 of 23

110-120v?

Are you sure? I think you are confused with the operating voltage of the amp itself. 220V-240V for most Europe, 110V-120V for North America. These tubes operates at 6.3V.

In most tube preamps/amps today, you can substitute any of the tubes in this family for one another. (I said most, not all) To be safe, you should always consult the manufacturer and/or other users of the same amp/preamp to make sure that it is OK.

I have used 6DJ8s for my ARC preamps and they sound fine. There are no cons. They just sound different. One of my favorite tubes is the Amperex Orange Globe 6DJ8s. Good bang for the buck.
post #15 of 23
Quote:
Originally Posted by sygyzy
You'll see...or maybe you already have. MUHAHAHA,
seriously dude what did you get? It wasn;t the super modified earmax pro off audiogon was it?????
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › What is the difference between 6922, ECC88, and E88CC tubes?