With so many listening to Orange Globes recently, I realized that I hadn't listened to them in awhile. So, I spent the afternoon comparing a set of 1968 Orange Globe O-Getters to a set of USN-CEP's. I used Senn HD800's, Audeze LCD-3's and Denon AH-D7000's. Lyr/Bifrost-Uber stack.
First, I have to say that I only listen to classical; but I compared using various orchestral, chamber, choral/vocal and solo piano music.
The short version: in all of these categories, to my ears, the USN-CEP's are in a class above the OG's. Not in the class of the S&H CCa or Amperex pinched waists, but very high on my hit parade. BUT, I think I can see where for certain types of music, with certain headphones, the OG's can really shine.
With the HD800 I immediately noticed a liquid warmth with the OG's; the bass and low-mids were very good. But to me, the mids and low-highs were a little recessed. This was most apparent with orchestral music. With violins - they were not quite as forward as they should have been in the mid-frequencies. Detail was good throughout, but the soundstage was shallow and wide, giving a very left/right feeling that was not ideal for orchestral music. This close presence of sound worked much better with chamber music/smaller ensemble. These tubes really gave me an "in-your-face" impression. I don't think HD800's are best with these tubes either. For orchestral 6/10. Chamber music/smaller ensemble/solos 7/10.
The OG's, especially the mids, were much better with the LCD-3's. Still a little laid back, especially with orchestral (still congested, lacking soundstage/air/height), but better. Piano music was nice with the HD800, but better with the LCD-3. Same with chamber music. Orchestral is just too crowded. Orchestral 7/10. Chamber/small ensemble/solo 8/10.
Finally, the D7000's. The best of the 3 for sheer musical enjoyment! The added bass and low-mids give a warm, liquid, lyrical presentation. The mids are still a little recessed, but so smooth that you just don't notice it as much (or care as much!). The warmth of these phones also tamed the highs a little, which I found musically pleasing. Even orchestral sounded good, except that in very dense passages with fast bass movement (Mahler 5) things got muddy/sloppy. Piano music was good, but there was a little treble resonance missing that gave the piano a not quite natural sound. All genres 8.5/10.
Then I went through the same sequence with the Amperex USN-CEP's. With the HD800 bass response was very fast with better separation in the instruments (more "air") than the Orange Globes. The sound seemed "purer" - I'm not sure how else to describe it - a better presentation. The soundstage was still not very deep (it was wide), but somehow it mattered less with these tubes. The mid-high and high frequencies sounded cleaner and more natural. Piano sounded more correct with all frequencies present. All genres 9/10.
With the LCD-3's - same comments. Overall better sound/presentation, albeit a little warmer with the LCD's; not quite as good as the HD800's on orchestral, but the slight added warmth makes chamber music (particularly with bright recordings) sound great; piano sounds great too, as does choral/vocal. Overall 9/10.
Now for the big surprise - the Denon D7000's - Warm, musical, lyrical, beautiful; similar comments to the OG's, but these are better - no sloppiness in fast bass passages; very clean, beautiful orchestral; cleaner highs; you really hear the biggest differences with these phones; chamber music, vocal and piano too - Wow!; All genres 10/10.