11
CONNECTORS AND DESCRIPTIONS
LINE IN
A two-channel source of high-quality audio, such as a CD player, DAT etc., connects to the audio inputs of the
ABX Comparator. These inputs use “Combo” jacks which accept both XLR and ¼" TRS connectors. During the
calibration step, the ABX bypasses this pair of inputs and replaces it with the 1 Vrms, 1 kHz sine wave oscillator
to both channels. The ABX output is also bypassed during the calibration routine.
LINE OUT A
This pair of fully-balanced outputs sends audio to the Channel 1 and Channel 2 inputs of amplifier A.
LINE OUT B
This pair of fully-balanced outputs sends audio to the Channel 1 and Channel 2 inputs of amplifier B.
AMP INPUT A
Both channel outputs of amplifier A return to the ABX comparator at the two pairs of AMP A input binding posts.
One pair is for Channel 1, the other for Channel 2, and they are fully balanced and isolated.
AMP INPUT A
Both channel outputs of amplifier A return to the ABX comparator at the two pairs of AMP A input binding posts.
One pair is for Channel 1, the other for Channel 2, and they are fully balanced and isolated.
OUTPUT
These two pairs of binding post outputs connect to the loudspeakers used in the listening tests. These are fully
balanced and isolated outputs.
SLAVE
This is an RS-232 port used to simultaneously drive another ABX slave unit for use in active multi-way speaker
systems. This feature is planned for development at a future date.
RS-232
A computer can control the ABX Comparator through the unit’s RS-232 port. Instead of the standard remote
control, you can use Microsoft® Visual Basic® to create a custom PC control application. This feature is planned
for development at a future date.
CH2—LINE OUT—CH1
CH2—LINE IN—CH1
CH2—LINE OUT—CH1
INPUT
OUTPUT
INPUT
RS232
B
B
A
M
P
CH1
CH2
CH1
CH2
A
A
A
M
P
P 1=G
P 2=+
P 3=-
B
A
SLAVE
QSC AUDIO
PRODUCTS INC.
REPLACE
FUSE WITH
SAME TYPE.
SEE USER'S
MANUAL FOR
RATING.
MADE IN
U.S.A.
Summary of Contents for ABX Comparator
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