Manual Blaupunkt gta 250 (page 10 of 38) (English, German, Dutch, French, Italian, Portuguese, Swedish, Spanish)

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GTA 250

nel must also be connected to the left-hand

loudspeaker and the right-hand amplifier

channel to the right-hand loudspeaker.

Bridged loudspeaker connections

The GTA can also be bridged in a mono con-

figuration. This enables you to use the am-

plifier for one or more subwoofer(s) or a mid-

range speaker. In this configuration the am-

plifier sums the right-hand and left-hand

channels, delivering a single channel (mono)

output.

Note:

The amplifier can sum the right- and left-hand

signal information only if both the right- and

left-hand RCA connections have been made.

CAUTION:

The amplifier must be presented with a

load of 4 Ohms or higher in bridged

mode. A lower load will cause the ampli-

fier to overheat or switch off. This can

lead to permanent damage of the unit.

Adjustment of the type and range

of the cross-over frequencies

The type of crossover (i.e. “low-pass” or “hi-

pass”) and the desired crossover frequency

can be selected on the GTA 250. If, for ex-

ample, you wish to drive a pair of subwoof-

ers, connect in accordance with the low-pass

diagram (fig. 3). The crossover frequency is

dependent upon the loud-speaker frequen-

cy range (consult the loudspeaker manufac-

turer’s data for the recommended frequen-

cy range).

“High- Pass” frequency control

This control is active when the switch is in

the “Hi-pass” position, and permits selection

of the desired crossover frequency. Exam-

ple: at a of 65 Hz, the loudspeaker has a

frequency range of 65 Hz to 30.000 Hz.

“Low-pass” frequency control

This control is active when the switch is set

to “Low-pass” and permits selection of the

desired crossover frequency. Example: at a

setting of 150 Hz, the loudspeaker has a fre-

quency range of 10 Hz to 150 Hz.

Bass boost

You can adjust the bass output of the ampli-

fier using the bass boost control. The set-

tings range covers 0 dB to +18 dB.

Operating indicator

(POWER / PROTECTION)

Green lamp: Power amp on, regular operat-

ing condition

Red lamp: Power amp has been switched

off electronically, due to a fault or failure.

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Blaupunkt gta 250 Manual

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