Crown Micro-Tech MT-1000 Informations techniques télécharger pdf (Page 12)

Page 12

Micro-Tech 600/1200/2400 Power Amplifiers

CAUTION: In Stereo mode, never tie the amplifier’s

outputs directly together, and never parallel them

with the output of another amplifier. Such connec-

tions do not increase the output power and may acti-

vate the protection circuitry to prevent overheating.

3.3.2 Bridge-Mono Operation

Bridge-Mono mode is used to drive loads with a total

impedance of at least 4 ohms (see Section 3.3.3 if the

load is less than 4 ohms). Wiring for Bridge-Mono mode

is very different from the other modes and requires spe-

cial attention. First, turn off the amplifier. Then select

Bridge-Mono mode by sliding the stereo/mono switch

to the right (as you face the back panel). Both outputs

receive the channel 1 input signal, but channel 2 is

inverted so it can be bridged with channel 1. DO NOT

USE THE CHANNEL 2 INPUT or signal quality will be

greatly degraded. Also, turn down the channel 2 level

control (fully counterclockwise).

Note: The channel 2 input and level control are not de-

feated in Bridge-Mono mode. Any signal feeding chan-

nel 2 will work against the channel 1 signal, and usually

results in distortion and inefficient operation.

Connect the load across the two red (+) binding posts

as shown in Figure 3.5. The positive (+) lead from the

loudspeaker connects to the red (+) channel 1 binding

post, and the negative (–) or ground lead from the loud-

speaker connects to the red (+) channel 2 binding

post. Do not connect the black (–) binding posts. Also,

the load must be balanced so neither lead is con-

nected to ground.

MIXER

LOUDSPEAKER

–

ONLY USE THE CHANNEL 1 INPUT

DO NOT

USE

DO NOT

USE BLACK

TERMINALS

STEREO

BRIDGE

MONO

PARALLEL

MONO

CAUTION:

TURN OFF AMPLIFIER

BEFORE CHANGING THIS SWITCH.

STEREO

BRIDGE

MONO

PARALLEL

MONO

CH-2

CH-1

TURN CHANNEL 2

OFF (FULLY CCW)

IN THIS MODE.

MICRO-TECH AMPLIFIER

Fig. 3.5 Bridge-Mono Wiring

BRIDGE-MONO MODE

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 38 39

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Crown Micro-Tech MT-1000 Informations techniques Page 12

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