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Registration
3. Owners Record
4. The Cabinetry / Our Commitment
Setup
5. Unpacking Your Speakers
6. Speaker Placement / Installation
8. Hook up Cables
9. Amplification
12. Speaker Connections
13. Fine Tuning
Technology
14. Designer’s Note
16. Specifications
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The model and serial numbers are located on the rear of the unit. Record
these numbers in the spaces provided below. Refer to them when calling
upon your dealer regarding this product.
Model No. _______________________________
Serial No. _______________________________
Date of purchase: _________________________
Thank you for selecting a Legacy Loudspeaker System. These handcrafted instruments will provide you with many years of listening
enjoyment. Please take a few moments to read this brief manual to insure
maximum benefit from your speaker system.
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Handcrafted
Beneath the surface of Silver Screen II’s elegant exterior lies rigid MDF
construction. Interlocking joinery maximizes the strength of the cabinet
parts. Polyester fiberfill is selected for internal damping. A sharp rap on
the enclosure will leave you with little more than bruised knuckles.
Each cabinet is impeccably finished on all exposed surfaces with select
veneers. The exquisite finish is hand-rubbed several times to assure a
patina at home with the most elegant decor.
Our Commitment
A great deal of forethought, love and satisfaction is instilled in each piece
of Legacy workmanship. We take pride in getting to know many of our
customers on a first name basis.
Your purchase of this product is backed by the renowned “Legacy
Satisfaction Guarantee”.
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Your new speaker system has been very carefully packaged to insure that
it travels to you safely. Each speaker is protected by a double-wall outer
carton with heavy V-board corner protectors. Molded foam end caps are
used to protect the elegant cabinetry, and a plastic liner is provided as
waterproofing.
Please save this packing for future transportation. If cartons become
damaged or misplaced, new ones can be purchased from Legacy Audio.
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To allow more flexibility in seating arrangements, your Legacy
loudspeaker is designed for broad lateral coverage. Optimal listener
position is actually about 5 to 15 degrees off of the axis normal to the
loudspeaker baffle (approximately 4-5’ off the floor).
Your Legacy speaker is optimized for a flat response in the far field.
Placing the loudspeaker or the listener near a room boundary will
generally increase low frequency impact. You may also wish to reduce low
frequency output with your preamp's bass tone control.
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The ideal conductor would have negligible resistance, inductance and
capacitance. The table below shows how a few actual speaker cables
measure up.
Cable Ωs/ft pF/ft µH/ft
12 ga. 0.0033 24 0.21
14 ga. 0.0048 17 0.13
16 ga. 0.0079 16 0.18
18 ga. 0.0128 28 0.21
Capacitance is considered insignificant in each cable because its effect is
well out of the audio bandwidth; inductance can be decreased (at the
expense of increased capacitance) by keeping the conductor pair closely
spaced.
How long would a cable have to be before inductance effects would
impinge on the audio spectrum? Approximately 300 feet of 12 gauge
would be required to establish a corner frequency of 20 kHz with an 8
Ohm loudspeaker. As you see, inductance is not a problem for most of us.
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What about phase shift due to frequency dependent travel times down the
speaker cable? Measurements show that 100 Hz waves will be delayed
about 20 billionths of a second behind 10 kHz waves when traveling to the
end of a 10 foot speaker cable. Since the cilia of the ear requires 25,000
times longer than this just to transmit phase information, phase shifting is
obviously not the primary concern when considering speaker cables.
What about resistance? Finally we are getting somewhere.
Resistance is the controlling factor of the amplifier/loudspeaker interface.
Excessive resistance can cause major shifts of speaker crossover
frequencies. The lower the impedance of the loudspeaker, the greater the
effects of series resistance. A 20 foot run of 18 gauge cable can cause up
to 10% deviations of crossover center frequencies. That same 20 feet can
un-damp your damping factor and reduce your systems’ output by onehalf decibel.
In summary, there are no perfect cables. The best way to approximate the
ideal would be to keep loudspeaker leads as short as is practical.
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Ideally the loudspeaker would be among the first components selected
when assembling a playback system. This would allow the user to choose
an amplifier capable of delivering adequate amounts of current into the
frequency dependent load presented by the loudspeaker. However, when
upgrading a system, audiophiles may find themselves matching their new
loudspeakers to their existing amplification. For this reason, extensive
measures have been taken to ensure that each Legacy speaker system
represents a smooth, non-reactive load to virtually any amplifier.
Often there is much confusion regarding amplification and loudness levels.
It should be understood that the role of the amplifier goes beyond that of
driving loudspeakers to a given sound pressure level. The amplifier should
be able to CONTROL the loudspeakers across the entire music spectrum.
This means that parameters such as damping factor (values greater than
60 are acceptable) and dynamic headroom should not be overlooked
when comparing amplifiers.
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How much power will your new speakers need? That ultimately depends
on your listening environment and musical tastes. As little as five watts per
channel should drive them to a level satisfactory for background music. A
typical 45 watt per channel receiver may fill a room with the compressed
mid-band energy of “heavy metal,” but seem to lack weight or control with
classical recordings. Some audiophiles feel that 200 watts per channel is
the bare minimum to avoid audible clipping distortion when reproducing
music at “live” playback levels. Your Legacy speakers are designed to
take advantage of “high-powered” amplifiers, so don’t be afraid to put
them through their paces.
How much is too much power? Rarely is a drive unit damaged by large
doses of music power. More often than not the villain is amplifier clipping
distortion. Even through decades of refinement, loudspeakers are still
notoriously inefficient transducers, requiring huge amounts of power to
recreate the impact of the live performance. Typically less that 1% of
electrical power is converted into acoustic output. (For example, an omnidirectional transducer with an anechoic sensitivity of 90 dB @ 1w/1m has
a full space efficiency of only 0.63%)
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When an amplifier is unable to fulfill your loudspeakers demands, a
damaging harmonic spike may be leaked to the high frequency drivers.
Another important point regarding loudness is that the dB scale is a
logarithmic one. This means that a 150 Watt amplifier will potentially
sound only twice as loud as a 15 Watt amplifier. If all of this discussion of
power and loudness seems a bit abstract, consider the example below.
The average acoustical power developed by a person speaking in a
conversational tone corresponds to a mere 0.00001 Watts. The power that
would be developed by the entire population of the city of New York
speaking at once would barely illuminate a single 100 Watt light bulb.
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At the rear of each of your loudspeakers you will find a terminal plate housing
two rows of jumpered binding posts. The upper row is the input to the “satellite”
portion of the speaker. The lower row is the input to the “subwoofer” portion of
the speaker. When left in place, the factory-installed jumper bars allow the
speaker to be driven with a single channel of amplification. (If biamping, or
biwiring, be sure to remove the jumper bars.
Connect each channel of amplifier to a loudspeaker via the five-way gold binding
posts provided. Dual banana plugs or gold plated spade lugs are recommended
means of termination. Be sure that you observe polarity when making the
connections. The positive (+) terminal of the amplifier should be connected to the
positive terminal of the loudspeaker. The negative (-) terminal of the amplifier
should be connected to the negative terminal of the loudspeaker.
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To facilitate proper set-up of your speakers in a variety of room situations, we
have included several heavy duty toggle switches on the terminal plate, located on
the back of the loudspeaker. All switches in the “up” position represent the
“anechoic flat” position. Switch 1: is a low frequency Q contour. It can be used in
the “down” position to reduce upper bass heaviness caused by standing waves
(typically the frequencies around 65 Hz, excited by the floor/ceiling
interaction).To increase bass impact, leave the switch in the “up” position. Switch
2: can be used in the “down” position to reduce excess energy in the lower
midrange. This is particularly useful in reducing “chestiness” due to floor
reflections. It can also be used as a gentle loudness contour for low level listening.
Switch 3: can be used in the “down” position to reduce high frequency “hardness”
due to room flutter or bright program material.
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How many times have you missed a critical line of film dialogue over
muffled or tinny sounding TV speakers? Have you ever found yourself
cranking up the volume to an aggravating level just to avoid missing the
plot? High school geometry taught us that a location in free space can be
specified by the coordinates of a single point and that two such points can
describe a line. Adding a third point allows us to define an entire plane,
while adding fourth and fifth points opens the possibilities to multiple
planes. Likewise, the localization advantages of discrete 5.1 multi-channel
audio become obvious. Adding a center channel speaker to a system will
result in improved clarity, stable dialogue and a natural sense of depth.
Central images retain their position even with extreme listener positions.
The Legacy Silver Screen represents state-of-the-art technology, resulting
in the absolute finest center channel available. Based on the successful
design of our FOCUS and Whisper™ loudspeakers, the Silver Screen
employs the same drivers found on the “satellite” portion of these
speakers. The high frequency information is handled by a 4” ribbon
tweeter. Capable of extension to 30 kHz, this driver provides a very airy,
detailed top-end.
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Midrange information is delivered by a 1.25” soft textile dome positioned
strategically below the ribbon tweeter. Vocals are silky smooth with
incredible articulation free of any harshness. If you require some
attenuation, simply throw switch 3 in the down position. All midbass is
masterfully controlled by a pair of handmade 7” Kevlar® Hexacone drivers.
These special drivers provide a rich, solid foundation capable of delivering
dynamic impact for a realistic presentation. For increased power
protection, throw switch 1 down. Attenuation of 3 dB can be provided by
selecting switch in the down position.
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System Type: 4 drivers, 3 way.
Tweeter: 4” Ribbon.
Midrange: 1.25” soft textile dome.
Midwoofer: (2) 7” Kevlar®.
Low Frequency Alignment: B4 Reflex.
Sensitivity: 98 dB @ 2.83 V/1m.
Frequency response: 48 Hz - 30 kHz +/- 2 dB.
Crossover frequency (Hz): 2.2k, 12k.
Recommended Amplification: 10 - 300 watts/channel.
Impedance: 4 ohms.
Dimensions: 10.5” H x 27.5”W x 10” D
Weight: 42 lbs.
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Notes:
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© 2003 Legacy Audio
150 Locust Street.
Macungie, PA 18062
Phone: 610 965 0494
Fax: 610 965 4915
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