Meyer Sound CQ-2 Operations Instructions download pdf (Page 5)

Safety Issues

Pay close attention to these important electrical and

safety issues.

Use a power cord adapter to drive the CQ from a

standard 3-prong outlet (NEMA 5-15R; 125 V max).

earth

ground

chassis

ground

The CQ requires a grounded outlet. Always use

a grounding adapter when connecting to

ungrounded outlets.

Do not use a ground-lifting adapter or cut the AC

cable ground pin.

Keep all liquids away from the CQ to avoid hazards

from electrical shock.

Do not operate the unit if the power cables are frayed

or broken.

Tie-wrap anchors on the amplifier chassis provide

strain relief for the power and signal cables. Insert the

plastic tie-wraps through the anchors and wrap them

around the cables.

Audio Input

The CQ presents a 10 kΩ input impedance to a three-pin

XLR connector wired with the following convention:

Pin 1 — 220 kΩ to chassis and earth ground (ESD clamped)

Pin 2 — Signal

Pin 3 — Signal

Case — Earth (AC) ground and chassis

Pins 2 and 3 carry the input as a differential signal;

their polarity can be reversed with the input polarity

switch on the user panel. If the switch is in the up

position, pin 2 is hot relative to pin 3, resulting in a

positive pressure wave when a positive signal is applied

to pin 2. Use standard audio cables with XLR connectors

for balanced signal sources.

Shorting an input connector pin to the case

can form a ground loop and cause hum.

A single source can drive multiple CQs with a paralleled

input loop, creating an unbuffered hardwired loop

connection. Make certain that the source equipment

can drive the total load impedance presented by the

paralleled input circuit. For example, since the input

impedance of a single CQ is 10 kΩ, cascading 20 CQs

produces a balanced input impedance of 500 Ω. If a

150 Ω source is used, the 500 Ω load results in a 2.28 dB

loss.

Troubleshooting

If the Active lamp does not light after connection to an

AC source for three seconds, the problem is probably in

the power supply. In the unlikely case that the circuit

breakers trip (the white center buttons pop out), the

amplifier or power supply may be malfunctioning.

Do not reset the breakers! Contact Meyer Sound for repair

information.

If abnormal noise (hum, hiss, popping) is produced

from the loudspeaker, disconnect the audio source

from the speaker. If the noise stops, then the problem

is not within the loudspeaker; check your audio and

AC power sources.

If problems persist, contact Meyer Sound. If repairs

are necessary, the CQ’s modular components are easy

to remove and ship.

Differential Inputs

1 2 3 4 5 6 7 8 9 10 ... 15 16

Comments to this Manuals

No comments

Meyer Sound CQ-2 Operations Instructions Page 5

Comments to this Manuals

Related products and manuals for Portable speakers Meyer Sound CQ-2