Wheatfield Audio Wheatfield Audio HA-4 Users Manual
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The HA-4 Headphone Amplifier
The Wheatfield Audio HA-4 is a audiophile-quality solid-state headphone
amplifier, designed to solve a number of the issues faced by the home
headphone listener.
The HA-4 combines a number of unique features:
• High voltage and current drive capabilities, to provide massive headroom for
all headphones, regardless of impedance
• Adjustable equalization designed to compensate for the headphone-ear
frequency response, to make headphones sound more like speakers
• Selectable crossfeed, which introduces filtered and delayed signals from one
channel into the other, again to simulate the sound of speakers
• A powerful, built-in, AC-operated power supply, using a toroidal power
transformer - no batteries or cheap AC adapter
• High-quality components, like Wima polypropylene capacitors, Burr-Brown
ultra-low-distortion amplifiers, and mil-spec resistors
• A unique design that provides safe storage for your valuable headphones
and their cord
In Wheatfield Audio's tradition, all this is provided without superfluous cosmetic
"fluff" that only adds to the cost of the product.
Wheatfield Audio's Warranty
Your HA-4 is warranted to be free of defects for two years from the time you
purchase it. Damage due to abuse, lighting, or improper use are not covered.
If your HA-4 has a problem, call or take the unit to the retailer where you
purchased it. They will help you get your problem resolved.
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