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Woo Audio WA7d Owner's Manual

Fireflies duo. class-a single-ended vacuum tube headphone amplifier & 32-bit/192khz digital to analog convertor
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WOO AUDIO WA7d Fireflies Duo
Class-A Single-ended Vacuum Tube Headphone Amplifier
&
32-Bit/192kHz Digital to Analog Convertor
Owner's Manual
Please review this manual before operating your WOO AUDIO™ product.
tm
©2014 WOO AUDIO
 Inc. All rights reserved. 
www.wooaudio.com 
Rev 1.0. May, 2014 
1 
 

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  • Page 1 WOO AUDIO WA7d Fireflies Duo Class-A Single-ended Vacuum Tube Headphone Amplifier & 32-Bit/192kHz Digital to Analog Convertor Owner’s Manual Please review this manual before operating your WOO AUDIO™ product. ©2014 WOO AUDIO  Inc. All rights reserved.  www.wooaudio.com  Rev 1.0. May, 2014  1   ...

  • Page 2: Important Safety Information

    Important Safety Information CAUTION: Amplifiers are shipped without the vacuum tubes installed. The end user must install the tubes, taking great care to install them correctly in the appropriate sockets. Incorrect installation will result in serious damage not covered by the warranty.

  • Page 3: Table Of Contents

    Table of Contents IMPORTANT SAFETY INFORMATION TABLE OF CONTENTS OVERVIEW GETTING STARTED CONNECTION OPTIONS QUICK INSTALLATION OPERATIONS FAQ - FREQUENTLY ASKED QUESTIONS WARRANTY AND SERVICE PRODUCT SPECIFICATION ©2014 WOO AUDIO  Inc. All rights reserved.  www.wooaudio.com  Rev 1.0. May, 2014  3   ...

  • Page 4: Overview

    Overview Thank you for choosing a Woo Audio product. WA7d “Fireflies Duo” Amp/DAC is a combination of a high performance vacuum tube headphone amplifier and a USB Digital-to-Analog Converter (DAC). WA7d is a pure tube design, utilizing a pair of 6C45 tubes in a class-A, single-ended topology with transformer-coupled outputs.

  • Page 5: Getting Started

    ③ Anti-slip silicone rubber glass pads (4pcs) ④ WA7p External Power Supply (not included when WA7tp tube power supply is purchased) ⑤ Tube Protection Glass ⑥ WA7d Fireflies Amplifier * USB, AC power cord, and inter-connection cables are not included.

  • Page 6: Front Panel

    Front Panel ⑦ Volume control for headphone outputs ⑧ 3.5mm or 1/8” mini In-Ear-Monitors headphone jack ⑨ 6.35mm or 1/4"headphone jack Top Panel ⑩ Tube sockets for 6C45 vacuum tubes Please pay close attention to vacuum tube installation alignment marks! Back Panel ⑪...
  • Page 7 ⑪ AC power inlet ⑪ Umbilical cord socket ⑫ Fuse box (Female) Slow blow fuse, ⑫ Power LED light 400mA@115V or 200mA@230V Optional WA7tp Vacuum Tube Power Supply is available for WA7 and WA7d amp/DAC ©2014 WOO AUDIO  Inc. All rights reserved.  www.wooaudio.com  Rev 1.0. May, 2014  7   ...

  • Page 8: Connection Options

    Connection Options  AM/FM tuner, XM Sirus satellite radio  Turntable (with Phono stage)  iPod, iPad, MP3 player  PC and Mac  CD player  Super Audio CD player/SACD  Blu-ray player, DVD player  Game consoles *Compatible, but not limited to. Appropriate cables and adaptors may be required.

  • Page 9: Quick Installation

    Quick Installation Installing tubes Align the tube in the tube socket according to the RED arrows Hold the tube firmly, slowly inserting it down into the socket. Care must be taken to only apply force perpendicular to the tube socket; never insert it at an angle.
  • Page 10 Installing the AC power cord (customer supplied) Plug the power cord into the AC inlet; see ⑬ in the above diagram. The AC inlet socket is a standard IEC type. You will need to obtain the correct type for your region if it not supplied with your order. U.K.
  • Page 11 Powering Up To power up on the WA7d Fireflies, flip the power switch ⑰ to the “I” position. The LED on the power supply will light up ⑫. Vacuum tubes should also light up the same time. Using the Asynchronous USB 2.0 port: The WA7d Fireflies Duo offers a USB 2.0 port is compatible with Windows or Macintosh OS computer.
  • Page 12 Installing the USB driver (Windows PC only) *These steps only apply for Windows 7. Plug in the USB 2.0 cable to the WA7 Fireflies and your computer. 2. Install the WA7 Fireflies Driver from the downloaded file from http://www.wooaudio.com/drivers/wa7-fireflies-driver-1.01.zip 3. Unzip the downloaded file. Locate setup.exe file and run it. 4.

  • Page 13: Operations

    Turn on the amp before properly installing ALL tubes and power supply. o Block vent holes of the power supply. o Use tubes that are not approved by Woo Audio. o Align the male plug to the DC input connector. The arrow marking on the plug should face up when it is properly oriented.

  • Page 14: Faq - Frequently Asked Questions

    Mac OSX 10.9 does not recognize USB device On some Macs with USB 3.0 running OS X Mavericks 10.9, WA7 and WA7d Fireflies can occasionally lose connection to the Mac. If this has happened to you, please give the following a try.

  • Page 15: Warranty And Service

    Please do not discard original packing materials. If for any reason, the equipment is to be shipped back to Woo Audio, please use the original packaging, including a copy of sales purchase documents and a detailed explanation of the problem(s).

  • Page 16: Product Specification

    Weight: AMP - 5.3 lbs / 2.4kg, Glass - 3.3 lbs / 1.5 kg PSU - 2.8 lbs / 1.4 kg Woo Audio is committed to continuously improve its products. Features and specifications are subject to change without notice. ©2014 WOO AUDIO  Inc. All rights reserved. ...

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