AMC
A2-18
Loudspeakers System
AMC
WELTRONICS CORP.
LONDON/LA
INSTRUCTIONS FOR INSTALLATION AND OPERATION
* AMC Proprietary Designed Heat Management
Woofer with Kapton Voice Coil for super linear
acoustic under full operating power range
* High Flexibility suspension recessed rubber
surround to offer super linear acoustic musical
sound.
* Japan super light & High Efficiency transparent Silk
Dome tweeter to offer super linear low distortion
musical sound.
* AMC Proprietary designed Cross-Over network for
Superb sound quality alignments.
APPLICATIONS AND FEATURE LIST
Connecting Your Speakers
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 wire will aid in proper
performance of your loudspeakers. The “gauge” of wire required is dependent
upon how long the distance between amplifier and speaker is to be. The
following chart will guide you as the minimum gauge of wire we 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 wire sizes are typically available at most specialty stores. You may want
to discuss other specialty wire alternatives with 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
way. Likewise, 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
which 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
Following the correct polarity connection indicated above will 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
within a few 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
Two major factors determine how your loudspeakers will perform in your
listening room:
A. contents or physical makeup of listening room
B. speaker placement within the room
A. Contents of the Room
Everything we hear is made up of direct sound and reflected sound. Direct
sound comes directly from the source to our ears, while reflected sound
“bounce off” something first. Certain materials don’t reflect sound as well as
others, or not at all. Thus, the same sounds can be perceived as different
depending on the amount of reflection which reaches us along with the direct
sound.
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No two listening areas sound exactly alike. The sound waves are absorbed or
reflected by the walls and contents in each area. This varies from “live” rooms,
which have hard surfaces and contents (i.e. bathroom) and totally reflect sound
waves, to “dead” rooms, which absorb sound through use of heavy drapes,
carpets, overstuffed furniture or absorption type panels on the walls. The
“average” listening room (i.e. your living room) is somewhere between; it likely
has carpets, drapes and stuffed furniture, which absorbs some sound waves,
along with smooth surfaced walls and a “hard” ceiling which reflects other
waves.
Rules of Thumb
1. In a “live” room speakers will sound muddled, indistinct and echoey, with
poor imaging. This can be remedied by adding some absorption materials,
like drapes, carpet and stuffed furniture.
2. Good speakers will sound good in “dead” room. However, since few sound
waves are being reflected, your speakers will require more amplifier power to
allow them to reproduce the same apparent sound (volume) pressure levels
as the same speakers in a “livelier” room. Also your speakers will be more
critical to room placement, since lack of reflected sound will limit the “ideal”
listening area. You can make a room somewhat “livelier” by exposing a hard
surface or two (i.e. opening the drapes, for instance, particularly close to the
speakers)
3. The “average” listening room which both reflects and absorbs sound, seems
ideal. It allows the listener to hear sound from the loudspeakers, as well as
some (but not too much) reflected sound.
B. Speaker Placement
The position of your loudspeakers in your room will 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. However, the prime listening area should not be closer to
each speaker than the distance between speakers. In most rooms, it is
helpful to angle both speakers slightly towards 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 wall). Speakers should never be placed kitty-corner in
a room; this destroys stereo imaging.
3. In most listening rooms, AMC bookshelf speakers will sound better raised
five (5) to twenty (20) inches off the floor. AMC floor standing models are
pre-positioned through design and are optimum when listening in the
seated position. This type of positioning, or design optimization is
necessary because the floor acts as an unwanted reflecting surface for low
frequencies.
For non-floor standing speakers, AMC has design stands which raise the
speaker to desirable heights.
4. The tweeters 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 where your loudspeakers will go in your
room, bear in mind that the quantity of bass from your loudspeaker will
increase as you move it closer to intersecting room surfaces (wall and wall,
wall and floor, wall and ceiling). Bass will increase the most when the
speaker is placed in a corner (intersection of two walls with floor or ceiling).
AMC speakers are designed not to need the extra bass reinforcement
caused by walls or corners. In general, it is best to keep your speaker at
least eighteen (18) inches away from any walls or corners. (exceptions are
the smallest AMC bookshelf speakers which can be placed closer to
intersecting surfaces.)
Precautions
1. All loudspeakers have operating limits. Consistently going beyond these
limits will damage your speakers. Usually you can hear when these limits
are being approached; your speaker will 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 down your volume to a point where that distorted sound disappears.
However, continued operation at loud distorted volume can damage the
speaker system. Such damage is not covered by warranty.
2. Be sure to lower your volume control each time you raise or lower your tone
arm from record, turn a station on your tuner, or operate your tape deck in a
fast winding 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 with long term reliability in
mind. However, 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 whether it is the speaker or another component that is faulty.
Interchange the speaker wire 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 switches to the other
speaker, than another component is likely defective.
Other problems such as hum on both channels, proper operation while using
phono, but improper on tuner, or conversely are not related to speaker fault.
Should these hints not determine which component is at fault, please check
with your AMC dealer for assistance. The dealer will either repair the problem
or direct you to your nearest authorized AMC Service Centre.
In Conclusion
This booklet has suggested certain ways to ensure your AMC speakers
perform as well in your listening room as it does in ours. The booklet also
suggests certain ways to ensure your AMC’s reliability in the long term. These
two points along with 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
wish you countless hours of superior listening pleasure.
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SPECIFICATION
Woofer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ½ inch
Voice Coil …... AMC Proprietary Designed Heat Management with Kapton 4L SV Coil
for super linear acoustic under full operating power range.
Rubber Surround …... High Flexibility recess suspension to offer super linear acoustic
Cone …... PP with designed curve for super linear piston moving for giving super linear acoustic
Magnetic Loop ….. N35 High Efficiency Magnetic Loop with over hang to offer 10 to 20 % extra field space
Tweeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 inch
Voice Coil …... AMC Proprietary Designed Heat Management with Aluminum 2L SV Coil
Dome …... Japan made super light & High Efficiency transparent Silk Dome to offer super linear low distortion
Magnetic Loop …... N35 High Efficiency Magnetic Loop
Crossover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Way, 2
nd
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 without notice.
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