Nutube 6P1 Hybrid HPA?

Hi,

Curious if there is any Nutube 6P1 + Zen HPA hybrid?

I’m looking for that nice tube warmth sound with high power to
drive my planar headphones. HE-4xx and M1070’s. Around 32 ohms.

Or should I just build the Nutube 6P1 buffer and the Zen HPA?
Single unit would be ideal 🙂

I’m currently using Asguard 3. It sounds great but I miss that tube sound.