Acoustic Image 550 IA 소유자 매뉴얼 - 페이지 3

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Welcome to Acoustic Image!

You have purchased a state-of-the-art musical instrument amplifier, combining

purity, power and portability in a package that sets a new standard in high

fidelity amplification.

Each of our designs is engineered to accurately reproduce the sound of

acoustic and electric instruments, delivering flat frequency response across

the entire musical spectrum; extended, tight, well-controlled bass; and

complete clarity of sound reproduction.

This manual provides operating information for your Acoustic Image Clarus 1

and Clarus+ integrated amplifiers.

The Basics

All Acoustic Image integrated amplifiers are based on the same superb class-D

power amp that delivers 400-watts into 4 ohms (Clarus 1) or 800-watts into 4

ohms (Clarus+) and on a sophisticated, sensitive preamplifier. The features of

the preamp and the power amp rating define the specific amplifier model.

The power amp is a high efficiency design that requires no external heat sinks

or cooling fans and is capable of driving loads as low as 2 ohms. AC power and

output speaker jacks are located on the rear of the chassis. A standard, three-

prong detachable AC power cord is used to provide power to the unit, while an

AC voltage selection switch allows the unit to operate at 115V/60 Hz or

230V/50 Hz. Japan models operate at 100V, 50/60 Hz only. See the rear panel

of your amp to verify the AC voltage capability.

The Clarus 1 is equipped with a one-channel preamp, the Clarus+ adds a

second, identical channel and a six-program effects unit. The input channels

of both preamp types incorporate combo jack interfaces that allow either a high

impedance instrument input (to optimize the sound of piezo-type pickups) or a

mic input (the Clarus+ mic inputs have a switchable 10 dB pad),

EQ,

an effects loop with return level control, a selectable notch/low cut filter

(Clarus 1) or low cut filter and phase reverse switch (Clarus+) for reduction of

feedback and low frequency boominess, a direct out capability with ground lift

and pre/post EQ switch, a master level control and a mute switch. The two-

channel preamp has a switch that allows the second channel to be

disconnected from the main amp and connected to a satellite power amp to

create a stereo system.

The Clarus+ is compatible with our Cabrio Docking System used in some of our

combo amps. If you have the appropriate speaker cabinet, you can dock it in

the cabinet.

Yours is a high fidelity amplifier with full-range frequency response and low

distortion and noise that will accurately amplify your sound. Onboard EQ is

sufficient to overcome room acoustics and subtly shape the sound of your

instrument. However, you should note that our amps are not designed to play at

tonal extremes or to allow an overdriven distorted output. To achieve these,

use an external effects box.

a three-band

Operation

Power

CAUTION: TO REDUCE THE

RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER.

NO USER SERVICEABLE PARTS

INSIDE. REFER SERVICING

TO QUALIFIED PERSONNEL.

CAUTION: TO REDUCE THE

RISK OF FIRE, REPLACE FUSE

WITH THE SAME TYPE 6.3A FAST

BLOW FUSE (F 6.3A H 250V)

Power Switch

Fuse

Clarus 1 Rear Panel

CAUTION: TO REDUCE THE

Power

RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER.

Switch

NO USER SERVICEABLE PARTS

INSIDE. REFER SERVICING

TO QUALIFIED PERSONNEL.

CAUTION: TO REDUCE THE

RISK OF FIRE, REPLACE FUSE

WITH THE SAME TYPE 8A FAST

Voltage Switch

BLOW FUSE (F 8A H 250V)

115/230V

Fuse

S/N 5F 0001H

Clarus+ Rear Panel

Plug the detachable AC power cord into the receptacle on the back of the amp

and into a wall receptacle. A power switch next to the AC connector turns on

power to the pre- and power amps, illuminating a "power on" indicator on the

front panel of the amp. A 6.3-amp fast blow fuse(Clarus 1) or 8-amp fast blow

fuse (Clarus+) is mounted on the back panel. To replace the fuse, turn off the

amp, remove the AC cord and use a small screwdriver to remove the fuse from

the fuse holder. A spare fuse is included with this manual.

AIl amps will work with either 115 volt, 60 Hz AC or 230 volt, 50 Hz AC power. A

switch located on the rear panel selects the appropriate voltage. Note that the

correct AC power cord must be used for connection to the appropriate wall

plug. If you do not have the right cord, you can buy one from an electronics or

computer store. Be sure the switch is in the correct position for the intended

application.

Operation at 230 volts with the switch in the 115 volt position

will damage the unit.

Please note that units sold in Japan operate at 100 volts only. The above

mentioned voltage switch is not available for these units.

volt amp at any other voltage than 100 volts will damage the unit.

Preamp

Refer to the signal flow diagram and the control panel drawings (page 4).

Inputs

These amps use combo jacks for the input to each channel of their preamp.

Either an XLR or 1/4 inch connector can be plugged into this type of jack. The

1/4 inch input has a 1 megohm input impedance that is optimized to get the best

sound from piezo pickups. The XLR input is a low impedance balanced input

with sufficient gain to allow microphones to be plugged into it. A switchable 10

dB pad is provided in the Clarus+ to attenuate the output of microphones that

are too "hot" for the mic input. Phantom power is available through the

connector for powering a mic or outboard preamp and

AC Input

115/230 V

50/60 Hz

400 Watts

Voltage Switch

115/230V

Speaker Output 2 min

AC Input

115/230 V

50/60 Hz

900 Watts

Headphone

Output

Operation of a 100

can be activated

using