Latest version since March 16, 2016.
Newly designed DAC and improved amplifier circuitry
Pure tube Class-A headphone amplifier with 24-Bit, 384K USB Digital-to-Analog Converter
WA7 Fireflies in Silver with a Clear tube protection glass
WA7 Fireflies in Black
WA7 Fireflies with the WA7tp vacuum tube power supply
The Firflies is powerful enough to drive any dynamic headphones, including the Audeze LCD-2/LCD-3, HifiMan HE5/6, Sennheiser HD800, Beyerdynamic T1, and Grado GS1000/PS1000, and more. Its dedicated mini phone jack is a true support for any IEMs. The large volume control ensures a smooth operation and precision.
6C45 is a "super" tube as it has a 50x gain and a large output. These attributes allow the Fireflies to have a incredibly clean and simple design.
WA7 Fireflies with a Windows 8 Pro tablet.
Hi-Z position is for high impedance headphone output while LO-Z is for low impedance. The RCA/USB/D-A selector is a custom made 3-position slide switch for USB digital input, RCA analog input, and also RCA output via USB D-A
The high performance linear external power supply is designed to work in a long hours operation. It is low noise and low heat.
Available in Black and Silver
We chose this commonly available tube for the convenience of allowing the user to tubes swap among other brands available for a personalized, tailored sound signature.
WA7tp (left) and WA7 (right), Audeze LCD-X on the far side.
Single-ended, class-A, transformers output
Linear external high-performance power supply (remote-controlled power switching)
Two 6C45 driver/power tubes
C-Media 6631A USB chip
TI PCM5102A 32-bit DAC chip
Headphones impedance : 8-600 Ohms
Input impedance: 100 Kilo-Ohms
Sampling rate: up to 32-Bit, 192kHz
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
Power consumption: 25W max
Mains supply: 100-120V, 220-240V, 50/60Hz, user selectable
Finish: Anodized aluminum
DC cord length: 4.25 ft or 1.3 m
Dimension: AMP: 4.8" L x 4.8" W x 5.1" H with glass
PSU: 7" L x 3.5" W x 2.2" H
Weight: AMP - 5.3 lbs / 2.4kg, Glass - 3.3 lbs / 1.5kg
PSU - 2.8 lbs / 1.4kg
WA7tp vacuum tube PS - 9.4 lbs / 4.3kg