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Idiomas disponibles
Idiomas disponibles
GTA 275
Switch position is ON:
only. after. an. aF. source. has. been. con-
nected.
Caution:
When.making.the.connection,.always.set.the.
volume.control.to.minimum.and.switch.off.
the.amplifier.
Level control
the. level. control. enables. the. input. sensitivity.
of. the. final. stage. to. be. matched. to. the. output.
voltage.of.your.car.radio.preamp.output.
the.range.of.adjustment.extends.from.0.3.v.to.
8.v..
adjust. the. input. sensitivity. in. accordance. with.
the.manufacturer's.specifications.when.connec-
ting.the.amplifier.to.other.radios.
Important:
turning. the. level. control. clockwise. increases.
the.input.sensitivity.of.the.amplifier,.and.there-
by.also.the.volume..the.level.control.is.however.
not. a. volume. control;. an. increase. in. volume. is.
not. achieved. in. the. maximum. position,. even. if.
this.subjectively.appears.to.be.the.case..the.sy-
stem.merely.increases.the.volume.more.quickly.
when.the.volume.is.turned.up.on.the.radio..
Loudspeaker connections
(if.the.amplifier.is.to.be.connected.in.a.bridged.
mode,. proceed. with. the. section. "Bridged. lou-
dspeaker.connections".)
as.with.any.audio.component,.connection.of.the.
amplifier.and.speakers.with.the.correct.polarity.
is.essential.for.good.bass.reproduction..ensure.
therefore.when.connecting.that.the.positive.(+).
amplifier. terminal. is. connected. to. the. positive.
(+). loudspeaker. terminal.. the. same. applies. to.
the.negative.(-).terminals..the.left-hand.ampli-
fier.channel.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.configu-
ration..this.enables.you.to.use.the.amplifier.for.
one.or.more.subwoofer(s).or.a.mid-range.spea-
ker..in.this.configuration.the.amplifier.sums.the.
right-hand. and. left-hand. channels,. delivering. a.
single.channel.(mono).output.
Note:
the.amplifier.can.sum.the.right-.and.left-hand.si-
gnal.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. amplifier. 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.275..if,.for.example,.you.
wish. to. drive. a. pair. of. subwoofers,. connect. in.
accordance.with.the.low-pass.diagram.(fig..3a)..
the. crossover. frequency. is. dependent. upon.
the. loud-speaker. frequency. range. (consult. the.
loudspeaker.manufacturer's.data.for.the.recom-
mended.frequency.range)..
"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.frequency.range.
of.10.hz.to.150.hz.
"High- Pass"
at.a.of.250.hz.,.the.loudspeaker.has.a.frequency.
range.of.250.hz..to.35.000.hz.
Bass boost
You.can.adjust.the.bass.output.of.the.amplifier.
using.the.bass.boost.control..the.settings.range.
covers.0.dB.to.+12.dB.
Operating indicator
(POWER / PROTECTION)
green. lamp:. power. amp. on,. regular. operating.
condition
red. lamp:. power. amp. has. been. switched. off.
electronically,.due.to.a.fault.or.failure.
this.information.is.subject.to.change.without.
notice!
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