I’ve been gradually upgrading the caps in my system to V-cap ODAMs, and have been amazed by the resulting improvements, but up until now I haven’t written much about them because I haven’t had first-rate competitor caps to compare them with.
That changed recently when V-cap introduced their new Tone cap line: (which I believe is essentially a low value ODAM marketed for guitar use).
The new caps allowed me to directly compare V-cap ODAMs with the much vaunted 0.01uf Duelund tinned-copper bypass cap that I’ve been using as the first coupling cap in my Brook 12A power amp (a push-pull 2A3 with ODAMs or glass capacitors in every other position).
I wired a switch into the Brook to allow rapid switching between the two capacitors - both so that I could get a good handle on the differences, and because I hoped to use the switch as a crude tone control.
The difference is not subtle. The Duelund IS very musical and has a nice Gestalt. It has a dark cast, and portrays the separate musical strands in a pleasing, undemanding way - somewhat undifferentiated but integrated very organically. The perspective is mid hall. The separate acoustics of multi-tracked recordings are not very apparent and everything coheres nicely.
Switching to the Tone cap, there is more “light” all-around (a slightly tipped-up frequency response relative to the Duelund?). The perspective is more nearly front row. Everything sounds bigger - even though I am listening in mono - and tone colors are more vivid. One can hear deeper into quiet passages and it becomes apparent, on repeated switching, that the Duelund’s impose low level noise (a sort of grayness) that obscures fine detail. This isn’t always an entirely bad thing however, in that sometimes it is nice to not be too aware, for example, of the separate strands of a multitrack recording. The Duelund is also easier to listen to with divided attention, like a really good radio. The Tone capped version by contrast, is intense, immersive, and almost hallucinatory in its effect on the listener. It cannot be listened to casually. I do sometimes find myself distracted by an awareness of the separate recording atmospheres in a mix with the Tone cap, but the extra color and vitality, the lucidity and the enhanced sense of being there, outweigh this slight drawback.
This is with ODAMs in every other position in the Brook amp - and a growing number up and down stream as well. Also with Duelund tinned wire throughout (both signal and power).
For me, the V-cap Tone cap is the clear winner, and I have trouble leaving the switch in the Duelund position.
It should be noted that there is a new version of the Duelund tinned-copper bypass that the Humble HiFi guy says is substantially better than the earlier one I’ve listened to. Given how dramatically the Tone-cap bests the older Duelund however, I’m not going to bother trying the newer variant.