Wheatfield Audio HA-4 User Manual

Wheatfield Audio Wheatfield Audio HA-4 Users Manual
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HA-4 Headphone Amplifier - Front panel controls
+8dB
+12dB+4dB
POWER ON LED
OUTPUT ON LED
VOLUME CONTROL
BYPASS SWITCH
CROSSFEED SWITCH
EQ CONTROL - 20kHz
EQ CONTROL - 2.5kHz
EQ CONTROL - 90Hz
This YELLOW LED is on whenever AC power is applied
This GREEN LED is lit when the output is turned on
Controls the gain of the amplifier, and hence the loudness
of the sound heard in the headphones
Selects the amount of inter-channel crossfeed between the
Left and Right channels as follows:
No crossfeed - full stereo
Light crossfeed - a small amount of signal is
fed between channels
Medium crossfeed - more signal is fed between
channels
Enables or disables the EQ and crossfeed circuits
EQ and crossfeed enabled (button out)
EQ and crossfeed disabled (button in)
Adjusts the boost to the frequency reponse curve at 20kHz
Fully counterclockwise corresponds to no boost (0 dB)
Fully clockwise corresponds to +12 dB
Adjusts the boost to the frequency reponse curve at 2.5kHz
See description above
See description above
Adjusts the boost to the frequency reponse curve at 90Hz

Wheatfield Audio HA-4 Specifications

General

Brand	Wheatfield Audio
Model	HA-4
Category	Amplifier
Language	English