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Wheatfield Audio HA-4 User Manual

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Wheatfield AudioWheatfield Audio
HA-4 Headphone Amplifier
Users Manual
DRAFT 2/17/00
Wheatfield Audio LLC
Andale, Kansas USA
www.headphoneamp.com
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Wheatfield Audio HA-4 Specifications

General IconGeneral
TypeHeadphone Amplifier
Number of Channels2
Input Impedance10kΩ
InputsRCA
Output Impedance10Ω
Frequency Response10Hz - 20kHz
Power SupplyExternal AC adaptor
Outputs1/4" Headphone Jack
Signal-to-Noise Ratio95 dB
Dimensions150mm x 100mm x 50mm

Summary

Important Information

Power and Fuse Details

Covers power requirements and fuse types.

HA-4 Headphone Amplifier - Front Panel

Front Panel Indicators

Describes the status LEDs for power and output.

Main Operational Controls

Covers Volume, Crossfeed, and Bypass switch functions.

Equalization Controls

Details the 20kHz, 2.5kHz, and 90Hz EQ adjustments.

HA-4 Headphone Amplifier - Rear Panel

The HA-4 Headphone Amplifier

Wheatfield Audio's Warranty

Connecting your HA-4

Power Connection

Setting voltage selector and connecting AC power.

Audio Input Connection

Connecting audio sources via RCA cables.

Headphone Connection

Connecting headphones and compatibility.

Using your HA-4

The HA-4 controls in detail

Volume Control Operation

How the volume control adjusts listening level and gain.

EQ Control Functionality

Details EQ frequency bands and boost levels.

Crossfeed Selector Explained

Simulating speaker crossfeed and its settings.

Bypass Switch Functionality

Bypassing EQ and crossfeed for flat response.

Technical Specifications