Summary of Contents for Hafler HA75-DAC
- Page 1 HA75-DAC USB Digital Audio Converter & Headphone Amp U s e r G u i d e Hafler is a division of Radial Engineering Ltd. 1588 Kebet Way, Port Coquitlam BC, Canada V3C 5M5 (604) 942-1001 info@hafler.com www.hafler.com...
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Page 2: Table Of Contents
This is where we post answers to questions from users that are often helpful. Then, if you are still missing something, feel free to send us an email at info@hafler.com and we will do our best to reply in short order. -
Page 3: Overview
The Hafler HA75-DAC is a digital audio converter and tube-based headphone amp with a number of innovative features that allow users to tailor the listening experience to their liking. At the heart of the HA75-DAC is a 12AX7 tube utilized for signal amplification. Tubes are preferred by... -
Page 4: Features
FeATuReS on: Activates the HA75-DAC. It is recommended to warm up the tube for 15 minutes to achieve thermal stability. SeLeCT: From the front panel you can select between the analog and the digital USB inputs. FoCuS: Active matrix lets you control the width of the stereo image to replicate listening to loudspeakers in a room. - Page 5 Tube ouT: Add the Tube Head's warm tube character to a signal path between a preamp and power amp if desired. 10. THRu: Un-buffered thru-puts that bypass the HA75-DAC tube circuitry. 11. uSb InPuT: Type-B USB input to receive digital audio from a laptop.
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Page 6: Connect
ConneCT Connecting to and from the Hafler HA75-DAC is easy. It features a USB input for connection to digital sources, standard RCA connectors for home use and balanced XLR-F inputs for professional use in studios. Before making any connections, turn off your audio system. This will prevent plug-in or turn-on transients from damaging more sensitive components such as tweeters. - Page 7 If you are using the HA75-DAC in the studio, it is equipped with balanced XLR female inputs that follow the AES standard with pin-1 (ground), pin- 2 (+) and pin-3 (-). These are paired with the RCA connectors. Use the selector switch on the rear panel to toggle between the unbalanced RCA inputs and the XLR inputs.
- Page 8 Plug in your headphones and then turn up the source audio system to a low level. Slowly increase the level on the HA75-DAC using the volume control knob. Testing at low volume will prevent damage to your headphones and protect your hearing should a connection be faulty. If no sound, check to make sure you have the front panel select switch set to the appropriate input.
- Page 9 DuAL HeADPHone ouTPuTS The benefit of having two headphone outputs on the HA75-DAC means you can share the listening experience with a friend or client! Using matched headphones is best as the impedance determines the loudness. Otherwise there may be a substantial level difference. This is also a great way to set and monitor the volume for someone else and ensure it is not excessive.
- Page 10 THe FoCuS ConTRoL One of the particularly cool features built into the HA75-DAC is the Focus control. This enables you to simulate the effect of listening to music in a free air space, as if playing music through speakers in a typical room. In essence, you can adjust the stereo image to suit.
- Page 11 12AX7 if the user has some other preference. It is however important to note that the HA75-DAC is biased for the 12AX7 and use with a 12AU7 or 12AT7 will not sound good at all.
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Page 12: Warranty
(excluding finish and wear and tear on components under normal use) for a period of three (3) years from the original date of purchase. In the event that a particular product is no longer available, Hafler reserves the right to replace the product with a similar product of equal or greater value. In the unlikely event that a defect is uncovered, please call 604-942-1001 or email service@hafler.com to obtain a RA...
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