Woo Audio WA7e Fireflies

No, the WA7e is specifically designed for electrostatic headphones that require a 580v bias. It is compatible with models from brands like STAX, Audeze, HiFiMan, and Dan Clark Audio, but it will not work with standard dynamic or planar magnetic headphones.

Yes, the unit features a tube preamplifier function with both 4.4mm balanced and 3.5mm stereo pre-out options. This allows you to connect it to powered desktop speakers or an external power amplifier for your home audio setup.

The WA7e uses 12AU7 vacuum tubes, which are known for adding warmth, texture, and a sense of space to the audio. Because the tubes are user-replaceable, you can experiment with different brands or types of 12AU7/5963 tubes to fine-tune the sound to your personal preference.

The XMOS-based USB input allows for plug-and-play connectivity with Mac and Windows computers, as well as Android and iOS devices. For mobile devices, you will simply need an Apple Camera Connection Kit or an Android OTG adapter.

The amplifier is self-biasing, which simplifies tube maintenance significantly. While the tubes will eventually need to be replaced after extended use, the process is straightforward and allows you to customize the sound profile of the amplifier.

The WA7e features an internal linear power supply that supports AC voltages between 115v and 230v. If your local power grid provides less than 115v, you will need to use a step-up transformer to ensure proper operation.