Just reflecting on the posts above. Out of curiosity, I popped back in my Brimar 6V6 tubes. This is actually the first time I try them with my E80CCs.
First of all, I think
@LetTheKidsTechno is right saying these Brimars are a good match with the E80CCs. The energetic, dynamic and slightly brighter nature of the E80CCs is very well balanced by the thicker, warmer and quite mellow sounding Brimars. Bass is big and punchy too.
On the other hand,
@TheAbyss2022 is right saying that soundstage suffers a little bit on the Brimars compared to other 6V6 tubes. Most notably the upper-mid/treble has less air to breathe. This is the small price to pay if someone wants the warm and mellow character of the Brimars.
To me this is just another example, how much the whole system synergy matters when choosing your tubes. IMO the biggest treat of the HEKSE is the huge (tall) soundstage. You don't want to limit the biggest strength of your headphones. The LCD4 and my Caldera still have good soundstage, but not as huge as the HEKSE so the slightly 'lower ceiling' is not as bothering.
To add my 2C as well, I just share my thoughts about my Bendix 6V6GTY and Brimar 6V6GT since I have just swapped them out.
I am surprised, how well the Brimars work with the E80CC. It really is a good balance, a good combo for someone who finds the E80CCs too intense. A nice, warm and mellow alternative. In comparison my Bendix pair sound more balanced, more neutral, more technical, clearer, more detailed and a little more spacious. Also, more dynamic with the E80CCs. Overall, I find the Bendix to be a higher quality tube, but the Brimars have a beautiful flavour and I can see myself reaching for this flavour every now and then.
Another thought regarding this recent E80CC hype, while I do share the sentiment that the E80CCs in general just bump the HA-3A's performance to the next level technically (notably increased space, increased dynamics, control and detail), they do not necessarily completely invalidate 12AU7 tubes for everyone. The E80CC sound
is a lot more dynamic and intense, which is not for everyone, or at least not always. The better 12AU7 tubes offer a more laid-back, less intense, less clear and less detailed listen, but they are still beautiful, balanced and provide a good, relaxing listening experience.
There will never be 'one tube to rule them all', and while recommendations and advice can help, you cannot completely escape personal experimenting on your own system with your own ears to find
your preference.
Betula
Very nicely written summary
And yes agree 100% that rotating in different 6V6 tubes will change the soundstage, (including L to R, and depth)
Some 6V6's are warmer, others as Betula noted clearer, and my 2 cents with the impression of enhanced soundstage. These tubes could be its just emphasizing a range different than the warmer tubes which gives that impression, and yes yet some other 6V6's are just more neutral and have a better stage period
I've read earlier on many where say the Mazda's tend to be more on the neutral side and allow the Pre-Amp tube rolls to be more of the change and I agree, as well as the Mazda's seem to have a little more clarity, yet IMO still offer a little "bump" to the lows, but not as much as rolling the Pre-amp tubes did.
these by far are my favorite, and I have 6V6G ST type Brimar, Fivre, RAF Blackglass CV509, Mullard and the in the 6V6 GTY style the vaunted 5992 power tubes, and another set of Mazda's
No matter what I roll in to the 6V6 slot, I always seem to come back to the Mazda's (npatrix, great pics, I have the same 6v6G "coke bottle tubes" as well as the 6v6GT type Mazda tubes, and IMO I like the "Coke Bottle, Shoulder Tube - ST - a little more, but it is personal taste as a good friend who came by one day and listened to my amp, liked the GT/GTY tubes I have more.)
The 5992's seem to offer a faster "pace" than the Mazda's and are great tubes, but EXPENSIVE, and lots of fakes/bad tubes out there for the 5992
And also agree with Betula that the E80cc does NOT completely displace the 12AU7's, not everyone should run out and get them.
There are some 12AU7's that are just outstanding in sound, just maybe a little less dynamic than the E80cc.
I'd love to get my hands on some of the Mazda Long Silver Plate 12AU7's that some have described to me as better than the E80cc, but the price of these are just as eye watering as the Telefunken G73R. (Another 12AU7 I'd love to try as some on these forums call it the holy grail of 12AU7) at close to $1K a pair....OUCH!
Thanks Betula for your words above
npatrix, congrats on your setup and I can vouch that setup does sound great.
Agree with you both for what I listen to it takes the HA-3A to the next level.
But it is 100% personal taste as I've had others tell me, to them the E80cc was too much and have I tried "X or Y" 12AU7, as they prefer the sound, and as Betula noted feel its a little more laid back and natrual sounding.
As I wrote earlier, the E80cc will NOT be for everyone but...
Great thing about the HA-3A it is VERY flexible, and can become what you want, with a little work and research.
For npatrix, notice you have the stock from Cayin NOS RCA coinbase rectifier in your picture.
Its a good tube, but rolling through several other NOS rectifiers (I have NOS rectifier tubes from GE, Tungsol, Raytheon, RCA and Sylvania) and found it offered the least amount of change, but still "changed" the sound a little, and for now have settled on a 60's NOS Sylvania tube
NOTE: I have the 25AX4GT rectifier, some who have the older 22DE4 rectifier have written it did NOT make that much difference. Would love to read some feedback for those who have rolled either)
Again all is IMO and definitely YMMV as we all hear differently and are probably chasing a different sound signature.