AMC A2-18 User guide

AMC
A2-18
Loudspeakers System
AMC
WELTRONICS CORP.
LONDON/LA
INSTRUCTIONS FOR INSTALLATION AND OPERATION
* AMC Proprietary Designed Heat Management
Woofer ith Kapton Voice Coil for super linear
acoustic under full operating po er range
* High Flexibility suspension recessed rubber
surround to offer super linear acoustic musical
sound.
* Japan super light & High Efficiency transparent Silk
Dome t eeter to offer super linear lo distortion
musical sound.
* AMC Proprietary designed Cross-Over net ork for
Superb sound quality alignments.

APPLICATIONS AND FEATURE LIST
Connecting Your Spea ers
A. Turn Off Your Amplifier
It is important that your amplifier or receiver is turned off before connecting or
disconnecting your loudspeakers; your amp/receiver or loudspeakers may be
subjected to severe damage if this precaution is not taken.
B. Selection of Speaker Wire
Selecting the correct size (“gauge”) of speaker ire ill aid in proper
performance of your loudspeakers. The “gauge” of ire required is dependent
upon ho long the distance bet een amplifier and speaker is to be. The
follo ing chart ill guide you as the minimum gauge of ire e recommend for
certain distances.
Distance Minimum Recommended Wire Gauge
Under 7.5 m (25 ft.) 18 gauge (AWG) 1.0 mm(ordinary household lamp cord)
7.5 – 15 m (50 ft.) 16 gauge 1.3 mm (heater cord)
15m – 30m (100 ft.) 14 gauge 1.6 mm
Over 30m (100 ft.) 12 gauge 2.0 mm
These ire sizes are typically available at most specialty stores. You may ant
to discuss other specialty ire alternatives ith your AMC dealer.
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C. Important of Correct Polarity
Speakers must be connected or “phased” identically. Coding on the leads
makes this simple. Leads are coded by colour, insulation pattern, or insulation
rib. For the first speaker, either lead can be connected to either speaker
terminal. Then, the second speaker must be connected in exactly the same
ay. Like ise, either lead from the right speaker can be connected to either
terminal of the right channel amplifier output, as long as the same coded
connection is used for the left channel. Connecting speakers identically to each
channel is facilitated by the coding of the speaker terminals on your amplifier
hich uses + and -, different colours, or other means to indicate polarity (see
your amplifier’s operating instructions). AMC speakers use colour coded
terminals to indicate polarity.
+ - - +
Amplifier Right Left
Follo ing the correct polarity connection indicated above ill ensure you of a
system that is “in phase” … a necessity for full bass output and a precise stereo
image.
A simple test serves as a double-check for proper phase connection. After
completing the connecting procedure, place your speakers face-to face, and
ithin a fe inches of each other. Set the amplifier to Mono, listen to some
music and reverse the connections on one speaker. Whichever setting gives a
louder and more complete sound is phased correctly.
Your Listening Room
T o major factors determine ho your loudspeakers ill perform in your
listening room:
A. contents or physical makeup of listening room
B. speaker placement ithin the room
A. Contents of the Room
Everything e hear is made up of direct sound and reflected sound. Direct
sound comes directly from the source to our ears, hile reflected sound
“bounce off” something first. Certain materials don’t reflect sound as ell as
others, or not at all. Thus, the same sounds can be perceived as different
depending on the amount of reflection hich reaches us along ith the direct
sound.
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No t o listening areas sound exactly alike. The sound aves are absorbed or
reflected by the alls and contents in each area. This varies from “live” rooms,
hich have hard surfaces and contents (i.e. bathroom) and totally reflect sound
aves, to “dead” rooms, hich absorb sound through use of heavy drapes,
carpets, overstuffed furniture or absorption type panels on the alls. The
“average” listening room (i.e. your living room) is some here bet een; it likely
has carpets, drapes and stuffed furniture, hich absorbs some sound aves,
along ith smooth surfaced alls and a “hard” ceiling hich reflects other
aves.
Rules of Thumb
1. In a “live” room speakers ill sound muddled, indistinct and echoey, ith
poor imaging. This can be remedied by adding some absorption materials,
like drapes, carpet and stuffed furniture.
2. Good speakers ill sound good in “dead” room. Ho ever, since fe sound
aves are being reflected, your speakers ill require more amplifier po er to
allo them to reproduce the same apparent sound (volume) pressure levels
as the same speakers in a “livelier” room. Also your speakers ill be more
critical to room placement, since lack of reflected sound ill limit the “ideal”
listening area. You can make a room some hat “livelier” by exposing a hard
surface or t o (i.e. opening the drapes, for instance, particularly close to the
speakers)
3. The “average” listening room hich both reflects and absorbs sound, seems
ideal. It allo s the listener to hear sound from the loudspeakers, as ell as
some (but not too much) reflected sound.
B. Speaker Placement
The position of your loudspeakers in your room ill directly affect their
performance. Room placement can often produce large apparent differences in
sound for small changes in placement.
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Some suggestions:
1. Set your speakers eight (8) feet to fifteen (15) feet apart, depending on
room size and listening area. The larger the room, the farther apart the
speakers may go. Ho ever, the prime listening area should not be closer to
each speaker than the distance bet een speakers. In most rooms, it is
helpful to angle both speakers slightly to ards the listening position ( 7
degree to 10 degree).
2. Both speakers should be positioned on the same plane facing the listener
(i.e. along the same all). Speakers should never be placed kitty-corner in
a room; this destroys stereo imaging.
3. In most listening rooms, AMC bookshelf speakers ill sound better raised
five (5) to t enty (20) inches off the floor. AMC floor standing models are
pre-positioned through design and are optimum hen listening in the
seated position. This type of positioning, or design optimization is
necessary because the floor acts as an un anted reflecting surface for lo
frequencies.
For non-floor standing speakers, AMC has design stands hich raise the
speaker to desirable heights.
4. The t eeters should be aimed at or be near ear level height to produce the
most realistic musical imaging and sound stage.
5. When making the decision on here your loudspeakers ill go in your
room, bear in mind that the quantity of bass from your loudspeaker ill
increase as you move it closer to intersecting room surfaces ( all and all,
all and floor, all and ceiling). Bass ill increase the most hen the
speaker is placed in a corner (intersection of t o alls ith floor or ceiling).
AMC speakers are designed not to need the extra bass reinforcement
caused by alls or corners. In general, it is best to keep your speaker at
least eighteen (18) inches a ay from any alls or corners. (exceptions are
the smallest AMC bookshelf speakers hich can be placed closer to
intersecting surfaces.)
Precautions
1. All loudspeakers have operating limits. Consistently going beyond these
limits ill damage your speakers. Usually you can hear hen these limits
are being approached; your speaker ill sound “muddled”, “gritty”, or
“fuzzy”, not clear and distinct. This indicates that either your amplifier/
receiver is being overdriven into damaging distortion, or that your speaker is
being asked to produce sound beyond its physical capabilities. If you hear
such distortion at loud volume, no harm should be done if you immediately
turn do n your volume to a point here that distorted sound disappears.
Ho ever, continued operation at loud distorted volume can damage the
speaker system. Such damage is not covered by arranty.
2. Be sure to lo er your volume control each time you raise or lo er your tone
arm from record, turn a station on your tuner, or operate your tape deck in a
fast inding mode.
3. If there is a need to fuse your loudspeakers, please contact your dealer or
E-mail [email protected] for proper value and fuse type.
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In Case of Difficulty
AMC speakers are designed and manufactured ith long term reliability in
mind. Ho ever, for one reason or another they may at sometime require
service.
If one channel is distorted, missing certain frequencies or altogether dead, you
must first identify hether it is the speaker or another component that is faulty.
Interchange the speaker ire connections on the amplifier or receiver, so that
the right speaker is connected to the left channel output and the left speaker is
connected to the right channel output. If the same speaker has the problem,
chances are that the speaker is faulty. If the problem s itches to the other
speaker, than another component is likely defective.
Other problems such as hum on both channels, proper operation hile using
phono, but improper on tuner, or conversely are not related to speaker fault.
Should these hints not determine hich component is at fault, please check
ith your AMC dealer for assistance. The dealer ill either repair the problem
or direct you to your nearest authorized AMC Service Centre.
In Conclusion
This booklet has suggested certain ays to ensure your AMC speakers
perform as ell in your listening room as it does in ours. The booklet also
suggests certain ays to ensure your AMC’s reliability in the long term. These
t o points along ith the product’s great appearance and terrific price give
your AMC’s the best value, a value you recognized by buying them.
Thank you once again for choosing AMC as your loudspeaker. We sincerely
ish you countless hours of superior listening pleasure.
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SPECIFICATION
Woofer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ½ inch
Voice Coil …... AMC Proprietary Designed Heat Management ith Kapton 4L SV Coil
for super linear acoustic under full operating po er range.
Rubber Surround …... High Flexibility recess suspension to offer super linear acoustic
Cone …... PP ith designed curve for super linear piston moving for giving super linear acoustic
Magnetic Loop ….. N35 High Efficiency Magnetic Loop ith over hang to offer 10 to 20 % extra field space
T eeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 inch
Voice Coil …... AMC Proprietary Designed Heat Management ith Aluminum 2L SV Coil
Dome …... Japan made super light & High Efficiency transparent Silk Dome to offer super linear lo distortion
Magnetic Loop …... N35 High Efficiency Magnetic Loop
Crossover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Way, 2nd order
Sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88dB
Nominal Impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Ohms
Frequency Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 Hz~ 20 K Hz
Box Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Vented
Wooden Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Teak
Dimension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300x200x360 mm
Net Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 7.4 Kgs/ pcs
Shipping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2 Kgs/ pcs
Weltronics Corp. reserved the right to improve its products at any time. There for,
specifications are subject to change ithout notice.
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WELTRONICS CORP.
LONDON/L.A.
AMC Web: http:// .amchome.com
21R-4249
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