ARC Audio XDi 805 Gebruikershandleiding - Pagina 3

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1. Specifications

Input Section

Because of the wide range of head unit output configurations all ARC Audio amplifiers

have an adjustable input sensitivity or "Gain" . The gain is not a volume or a power

limiting control like a throttle. It makes the amp more sensitive to input from the stereo.

With the gain up the amp will reach full output at a lower volume setting on the deck. At

higher gain settings the amp also becomes more sensitive to noise from the car's

electrical system. Try to run the gain at the lowest setting possible for you system.

There is no correct gain setting. Because

speakers require different power demands

to reach the same output, the gains most

often need to be used to compensate for

these differences. If you tried to set all the

gains at half way you would probably find

the system didn't sound very good. Using

good judgment and listening carefully to

each speaker is still the best way to tune a

system.

Crossover Controls

A crossover is a device that removes unwanted frequencies from a speaker or

amplifier. A tweeter can easily be destroyed by bass notes if they are not filtered out.

Likewise a subwoofer will not sound natural if it is playing midrange notes. A

crossover removes these sounds from

the speaker. As you might guess, careful

adjustment is need to ensure that all the

speakers are playing the right sounds

and that you are left with no "holes" or

low spots in the frequency response.

FRONT

REAR

Phase Shift Control

"Timing is everything". In a typical stereo installation the mid bass speakers are in the

front of the car between 3 to 5 feet from you ear. The sub woofer is all the way in the

back, 9 to 12 feet way. Sometimes more. The Phase control can be used to compen-

sate for this difference in

distance by causing the sound

from both speakers to arrive at

your ear at the same time. This

can really help bring the bass

up front making the system

sound more like a live perfor-

mance.

GAIN

MIN

GAIN

FRONT

REAR

FRONT

POWER/

PROTECT

FULL

GAIN

BASS BOOST

LOW

HIGH

LOW

HIGH

MIN

MAX

250

FULL

MIN

MAX

250

LOW

HIGH

GAIN

BASS BOOST

LOW

HIGH

REMOTE

REAR

FRONT

SUB

REMOTE

GAIN

PHASE

MIN

MAX

180

POWER/

PROTECT

100

250

LOW

BASS BOOST

BOOST FREQ

FRONT

SUB

Bass Boost cont.

The XDi amplifier feature a Quasi Parametric Bass EQ Bass Boost with adjustments for

both Boost Level and Boost Frequency. Begin your adjustments at low volume. Turn the

Bass Boost Level control about 1/2 way up. Next, turn the Bass Boost Frequency up and

down. This will take some tweaking but try to find the setting that gives you a richer and

fuller sound without over working the subwoofer. Play several different kinds of music

to test your adjustment You may find you

have to go back and make some changes

and compromises to get it sounding right

with an assortment of music. Use Bass

Boost carefully. The demands on power

output are tremendous. Try to minimize

the use by changing woofer position or the

MAX

enclosure size.

MAX

Subsonic Filter

A Subsonic filter acts like a crossover but at very low frequencies. It removes sounds that

are so low in frequency that the speaker cannot reproduce them. You see the cone

moving but hear no sound. This can be

very hard on your woofer especially at

high power. If you are using a ported

subwoofer enclosure at high power you

should use a Subsonic Filter to limit cone

movement at very low frequencies.

Speaker outputs

This amplifier is a multi channel amplifier design. Meaning it has more than one

LINE OUT

channel of speaker outputs. It is equipped with a large block style terminal for speaker

connection. Make this connection carefully and neatly. Strip your wire back and twist

the exposed leads and insert them into the block terminal while being careful that

there is no loose or frayed strands of wire and

tighten the Allen head screw down on the

terminal till the wire is tightly secured in

place. If the wires ever come in contact with

each other the amplifier will go into protec-

tion.

Know your total ohm load before you

make any connections.

MIN

MAX

250

100

GAIN

SUB

LOW

BASS

BOOST

PHASE

SONIC

ONIC

BOOST

FREQ

MIN

MAX

250

GAIN

SUB

LOW

SONIC

FRONT

REAR

BRIDGED

LEFT

RIGHT

180

BASS

BOOST

FUSES

25 X 2