We heard lots of electrostatic head amps but keep tossing about a single tube amplifier that could get the most tonal richness and depth out of Stax's 009/007 as well as high-end dynamic headphones such as Focal's Utopia, Kennerton's Odin; and other electrostatic ear-speakers with various bias voltage. After months of prototyping, we have finally reached to the version that fulfills those expectations, called DT-HWT.
It delivers a feeling of musical harmony that we never got close to before. The mid-range is gloriously rich, with more timbre on vocals. The bass is much fuller with far more weight. The soundstage is also expansive and the separation is much clearer.
The highly reserved power supply circuit is constructed with choke coils and large capacitor group; achieving high headroom and wide bandwidth sound possible.