Woo Audio WA7 Headphone Amplifier

The WOO Audio WA7 “Fireflies” Amp/DAC is a combination of high performance vacuum tube headphone amplifier with a built-in USB Digital-to-Analog Converter. It employs a pure tube design, utilizing 6C45 tubes in a class-A, single-ended topology, with transformer coupled outputs. No semi-conductors used in the entire signal path. The D-A converter is designed to be capable of up to 32-bit/192k sampling rates. Pure data integrity is maintained while it is transmitted via standard high speed USB 2.0 interface operating in asynchronous mode.
The high quality construction features include a pair of Nickel Alloy core output transformers, all-aluminium chassis with no screws visible from any viewing angles, a 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. To accommodate different system setup needs, “Fireflies” can also be used as a stand-alone D-A Converter.

Features

Handmade output transformer with Nickel Alloy core
32-Bit, 192kHz high resolution playback
Ultra-low jitter USB 2.0 runs on Asynchronous mode
High and low impedance output facilitated via toggle switch on back panel
Open load protection will automatically engage to prevent the amp from damaging when no headphones are plugged in
Multi-functional switch for USB input, RCA input, and RCA output via D-A
The RCA connectors can be used either as RCA analogue inputs or USB DAC to RCA analogue line-out
All-aluminium chassis with no screws visible from any viewing angles
High clarity tube protection glass
Multi-layer military grade PCBs
Customized driver for Windows Vista/XP/7/8
USB Audio Class 2.0 is natively supported by Apple OS X version 10.6.4 and above without installing driver

Model: WA7 Fireflies
Headphone Amp Design: Single-ended, class-A, transformers output
Power Supply: Linear external high-performance power supply
Tubes Used: One matched pair of 6C45, one tube per channel
USB Receiving Chipset: C-Media 6631
DAC Chip: TI PCM5102A 32-bit chip
Sampling Rate: Up to 32-Bit, 192 kHz
Inputs: 1 Asynchronous USB 2.0, 1 RCA
Outputs: 1 x ¼" and 1 x 21/8" headphone outputs, 1 RCA (same connector as the input)
Headphones Impedance: 8 - 600 Ohms
RCA Input Impedance: 100 kOhms
Max Output: Approx. 1 Watt @ 32 Ohms
Frequency Response: 11 Hz to 27 kHz, 0.5 dB
Distortion: < 0.03%
Signal to Noise Ratio: 95 dB
Power Consumption 25 W max
Mains Supply: 220 - 240 V, 50/60 Hz
Fuse: Slow Blow Fuse, 400 mA @ 115 V, or 200 mA @ 230 V
Amp Body and PSU Finish: Anodized Aluminium
Dimension: AMP: 4.8" L x 4.8" W x 5.1" H with glass; PSU: 7.5" L x 3.5" W x 2.2" H
Weight: AMP - 2.4 kg, Glass - 1.5 kg; PSU - 1.4 kg

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

Shipping Rates

We calculate your shipping rate based on the total weight of your items and your delivery address. Standard shipping to the UK Mainland (excludes Northern Ireland, Isle of Man, Channel Islands) is free, except where specifically indicated. Don't worry, you'll always see the final shipping charge displayed before you reach the payment step (on the checkout page).

Carriers

We despatch the bulk of our UK mainland items on a 24 hour service.  Non-Mainland locations – Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as UPS and occasionally by a Pallet service.

Order Tracking

If a tracking # is provided by the carrier, we will update your order with the tracking information. Please note that some orders will not have tracking numbers.