2. amps-preamps
  3. 1365394724

McIntosh Vintage C22 Telefunken 12AX7 or ECC803's?

Anyone try running Telefunken ECC803's tubes in the vintage McIntosh C22 pre-amp? The C22 is currently running Telefunken 12AX7 tubes. I am curious if there is a big audio quality impact with a swap especially in the phono section; the ECC83's are super quiet hence perhaps a good match for the phono.

I currently run 801's, 802's and 803 in the MC275 and the impact is significant with the 803 contributing the most.
dailycitrus
mechans
2,999 posts
 
As larryi said there is no ready supply of NOS/OS Telefunken 803S. They are truly rare not the BS rare you see in ads. The cost is astronomical as well.
I can help make a tube recommendation if you provide what you want the tube to do to your sound. Telefunken ECC83 12AX7 types are indeed kind of steely. They provide a clear/clean and strong signal.
dailycitrus OP
26 posts
 
Mechans,

I like the sound that the currently installed Telefunken 12AX7s provide, very lush and not analytical . I have just 2 objectives with considering the 803s; reduction of noise for phono and increased performance in clarity or sound stage if possible.

I run MC cartridges with step up transformers. I don't have a noise problem but like to keep looking for solutions to keep pushing any noise that is inherent to phono down. Lower is always better.

As for improvement in sound, clarity or stage, we all push for more but in this case not at the cost of too bright which the 803s can do. Let me know what you suggest; solution maybe stay with what I have.

In the mean time I will have a few extra NOS ECC803s in a week or so I can swap in and listen to the difference. I don't think I need to replace all 6 in the C22, just 2 for phono test. I will have to check.

Thanks for your input.
mechans
2,999 posts
 
You are trying the right tube for low noise and clean signal. If you can get ECC803S, then more power to you, they are selected for the reasons you are tube rolling.
larryi
1,972 posts
 
Many consider Telefunken ECC83/12AX7s to be on the bright or lean side. If you consider them to be lush enough for you (I do as well), then you certainly ARE a candidate for appreciating the ECC803S. These have a similar tonal balance, but also, greater clarity and a bit more explosive dynamics.

You possibly could rationalize such an expense by the reputation of that tube outliving its owner.
dailycitrus OP
26 posts
 
Larryi, your right the 803S are bright. I am currently running 2 MC275's in a horizontal bi amp config with all Telefunken 801S, 802S and 803S NOS tubes. Adding 803S to the C22 pre-amp will be too much. I am going to experiment with a softer tube in the C22 and in the MC275; GL Reissue 12AX7's and the NOS Amprex BugleBoy 12AX7 (D getter Long Plate.

The 803S is wonderful but I can not see having them in the C22 and MC275; only one.
More to discover