Woo Audio WA7 Fireflies 2nd Gen Demo

Demo, 7.5/10, full warranty.

Woo Audio WA7 Fireflies, Black finish. New 2nd Gen unit with upgraded dac It sounds as good as it looks and it looks even better in person. Excellent build quality and finish with the solid glass top, this dac/headphone amp accepts a usb signal from any windows or mac computer and in this Gen2 model, the usb input works with phones and ipads as well, via adaptor. Analog selectable line out / line in included.

The 3.5mm port has a lower gain output that works wonders for high sensitivity in ear monitors and the 6.5mm port offers the full output of the amp for full size headphones, along with high and low impedance selector on the back of the amp, to best match performance with your headphones. A perfect high end desktop all in one, with usb in to an excellent dac section, a wonderful sounding WOO tube amp. The solid glass top panel serves as a heat sink, protects the tubes and looks tremendous. Includes a high quality linear power supply. Made in USA.

From Woo Audio: The Woo Audio WA7 “Fireflies” Amp/DAC is a pure tube design, utilizing 6C45 tubes in a class-A, single-ended topology, with transformer coupled outputs. There are no semiconductors used in the entire amplification path. The D/A converter is designed to be capable of up to 32-bit/384k sampling rates. The high quality construction features include a pair of Nickel Alloy core output transformers, all-aluminum chassis with no screws visible from any viewing angles, a remote-controlled linear external power supply for amplification circuitries, a custom built toroidal power transformer, and multi-layer military grade PCBs.

The dedicated port for in-ear-monitors carries a full range of volume controls ensuring minimal noise. Despite its incredibly compact size, “Fireflies” is a power-house with the capacity to drive almost any demanding audiophile headphones. Ultra-low jitter USB 2.0 dac runs on Asynchronous mode 


  • Single-ended, class-A, transformers output
  • Linear external high-performance power supply (remote-controlled power switching)
  • Two 6C45 driver/power tubes
  • Teflon tube sockets
  • ESS Sabre Reference DAC (ES9018k2m)
  • USB compatible with Mac, PC, IOS, Android
  • Headphones impedance : 8-600 Ohms
  • Sampling rate: up to 32-Bit, 384kHz
  • Inputs: 1 Asynchronous USB2.0, 1 RCA
  • Outputs: 1 1/4" and 1 1/8" headphone outputs, 1 RCA (same connector as the input)
  • Max output: approx 1 watt @ 32 ohms
  • Frequency response: 11Hz to 27kHz, +/-0.5dB
  • Distortion: <0.03%
  • S/N: 95dB
  • Finish: Anodized aluminum
  • 1 year warranty

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