HEIL PRAS EQ Manual page 2

Parametric Receive Audio System Equilizer
(PRAS EQ)
The Heil Parametric Receive Audio System Equalizer (PRAS EQ)
is a state-of-the-art audio processer that enhances the internal
audio systems of amateur radio, shortwave, commercial, and CB
receivers. The PRAS EQ allows radio operators to modify, shape,
and improve the audio output of their receivers using three sepa-
rate equalization controls.
Dimensions: 10.25"W x 2.5"H x 8.5"D
Weight: 3.30 lbs
Parametric Equalization Controls
Midrange frequencies are the most critical for achieving clear
voice articulation in receive audio. The PRAS EQ allows operators
to have unique control over these important frequencies. First, op-
erators can adjust the parametric midrange filter (MID FREQUEN-
CY) from 400 Hz through 4 kHz, with the recommended sweet
spot being at 2.5 kHz. In addition, operators can control the level
of these midrange frequencies plus or minus 15 dB using the MID
GAIN control. Combined with a low frequency filter (LOW) set at
160 Hz, and a high frequency filter (HIGH) set at 6 kHz, the PRAS
EQ provides operators unparalleled control and quality of their
receive audio. See the following page for recommended Initial Set-
tings, and suggested settings for common receive audio issues.
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