Legacy Whisper HD User manual

Owners Manual For The
Whisper HD
Loudspeaker System
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Registration
Owners Record 3
The Cabinetry Our Commitment 4
Setup
Speaker Placement 5
Hooking Up Cables 6-7
Amplification 8-10
Speaker Connections 11-13
Whisper Wave Launch Processor 14
Technology
Specifications 15
Table of Contents
Page
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The serial number is located on the rear of the unit. Record this
number in the space provided below. Refer to this when calling your
dealer regarding this product.
Model: Whisper HD
Serial No: _________________________
Date of purchase: ___________________
Thank you for selecting a Legacy Loudspeaker System. These hand-
crafted instruments will provide you with many years of listening en-
joyment.
Owners Record
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Handcrafted
Beneath the surface of Whisper HD’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”.
The Cabinetry / Our Commitment
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Positioning Whisper for good performance is quite a bit easier than for most speakers. Remember
that whisper is actually an acoustic gun with a highly controlled directivity pattern. Corner place-
ments are actually quite workable though not necessarily optimal. Whisper will not become
“boomy” like a conventional system and it will not interact strongly with the sidewalls of your room.
Simple Guidelines:
1. You may position the Whisper speakers farther apart than most other speakers. This will help to
acoustically shadow the head properly and maintain better channel separation. Experiment with
what works best in your room. As a starting point you might also try the following:
deal Speaker spread = 0.6 X Distance from speaker plane to listener position
2. Toe the speakers in more than with other speakers. In most circumstances crossing speaker axes
just in front of the listener’s head works best. This will broaden your sweet spot horizontally. If dis-
persing into an L shaped seating arrangement you might find the best results by aiming the left
speaker at the right most seating position, and the right speaker at the left most seating position.
3. Hearing the most ambiences in the recording and the least reflection from your room favors a lis-
tener position that is no farther from the plane of the speakers than two thirds the geometric width
of your room. More simply, if the room is 16 feet wide then the sitting no farther than 12 feet will
allow you to hear more of the recording and less of your room.
Speaker Placement
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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 ef-
fect is well out of the audio bandwidth; inductance can be de-
creased (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.
Hooking Up Cables
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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 control-
ling factor of the amplifier loudspeaker interface. Excessive resistance can cause ma-
jor shifts of speaker crossover frequencies. The lower the impedance of the loud-
speaker, 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 one half deci-
bel.
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.
Hooking Up Cables
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Ideally the loudspeaker would be among the first components selected when assembling a play-
back 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 under-
stood 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 mu-
sic 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.
Amplification
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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 advan-
tage 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 noto-
riously 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%)
Amplification
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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.
Amplification
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The Terminal Plate
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.)
Be sure that you observe polarity when making the connections. The posi-
tive (+) terminal of the amplifier should be connected to the positive termi-
nal of the loudspeaker. The negative (-) terminal of the amplifier should be
connected to the negative terminal of the loudspeaker.
Speaker Connections
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Biwiring
Biwiring allows one to minimize the cable losses between the amplifier and the
loudspeaker. This is accomplished with a single stereo amplifier by running
separate sets of cables to the satellite section and the subwoofer section from
the same channel of amplification. When biwiring, we recommend the use of
gold spade lugs or dual banana plugs. This can make the task much easier and
safer than bare wire connections. Again, the major reasons for biwiring over
conventional wiring are greater power transfer (improved efficiency) and
tighter control over the drivers (better damping).
Uniamplification vs. Biamplification
Due to its high efficiency, the Whisper system performs well when driven by a
stereo amplifier capable of 50 watts per channel. However, it will handle cres-
cendos in excess of 500 watts at most frequencies. Audiophiles may opt for the
flexibility that biamplification can offer. Should you elect to biamplify Whisper,
be sure to remove the jumper wires that join the high frequency binding posts
(upper pair) and the low frequency binding posts (lower pair) at the rear of the
loudspeaker before making your connections. The high frequency amp will be
fed by the Fixed Outputs of the Processor, while the low frequency amp will be
fed by the Variable Outputs of the
Processor.
Speaker Connections
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1. Vertical Biamping
Vertical biamplification requires the dedication of a single stereo amplifier for
the left speaker, and another stereo amplifier for the right speaker. This con-
figuration improves channel separation and can improve imaging slightly.
2. Horizontal Biamping
Any two stereo amplifiers may be utilized in horizontal biamplification. Many
audiophiles prefer the "sweetness" of tubes on the satellite portion of the
loudspeaker while favoring the "control and weight" of solid state amplifiers
on the bass section. The biggest drawback of such a marriage of amplifica-
tion is that the two amplifiers may have different input sensitivities or output
polarities. Small differences in the input sensitivities may be overcome by
using the Whisper Processor. It's also a good idea to check the owner's
manuals to establish if the amplifiers are inverting or non-inverting. If the
two amplifiers are of opposite polarity, then you should reverse the polarity
at the inputs of either the subwoofer or satellite binding posts.
NOTE: This only applies to loudspeakers that incorporate the subwoofer and
satellite section in a single enclosure. It does not apply towards the separate
powered subwoofer satellite configuration. You must always observe the po-
larity when connecting the speaker wire to a powered subwoofer.
Speaker Connections
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The high definition Digital Wavelaunch Processor hosts a LEGACY custom algorithm which automatically loads when the processor is powered on. Fac-
tory settings are ‘plug and play’, and do not require a computer to utilize. Connections between the preamp and power amplifier should be as below.
Function Routing nput Output
Proper equalization of the left Whisper speaker 1 1
Proper equalization of the right Whisper speaker 2 5
Equalization capabilities for a Center channel 3 3
Equalization capabilities for LFE subwoofer 4 7
Equalization capabilities for stereo + LFE mix
Left subwoofer (Lmain + LFE) 1,4 2
Right subwoofer (Rmain + LFE) 2,4 6
(Note: factory configuration for Whisper does not utilize outputs 4 or 8)
(Note: a different routing pattern is required for program 4)
Programs
1 Whspr Normal standard settings for flat response
2 Bass Plus (increases bass, +2 dB)
3 Bass Minus (shelves bass, -2 dB)
4 Whspr Biamp (includes digital crossover filtering)
5 Subs added (Stereo Subs)
Selecting the Program
1. Press the MENU left arrow
2. Scroll through the programs using the job wheel
3. Press enter to select the program of choice
4. Press enter again to confirm selection. The program will now load.
Users are welcome to load the included software and learn to make individual adjustments as desired. However it is recommended that any changes
be saved as Program 6 or higher to avoid overwriting the factory settings.
Whisper Wave Launch Processor
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System Type: 10 drivers, 4 way
Tweeter: 1” dual pole neo ribbon,
folded Kapton diaphram
Midrange: 3” dual pole neo ribbon, vapor
deposited kapton diaphram
MidWoofer: 4 x 7" Rohacell reinforced
Silver Graphite, cast frame
Subwoofer: 4 X 15” cabon pulp composite
Low Frequency Alignment: 2nd Order Differential
Frequency Response: 22Hz – 30 kHz includes 24 bit processor
mpedance: 4 Ohms
Sensitivity: 95 dB
Recommended Amplification: 10 - 600 Watts
Crossover Frequency: 300, 3K, 10K
Dimensions (H x W x D): 63” X 17” X 13”
Weight: 210 pounds each
Specifications
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Legacy Audio
3023 E. Sangamon Ave.
Springfield, IL 62702 USA
800-283-4644
States that this product is in conformity with the
with the essential requirements and other relevant
provisions of:
Low Voltage Directive 2006 95 EC
EMC Directive 2004 108 EC
CE Declaration of Conformity WEEE Compliance
Product Disposal—
Certain international, national
and or local laws and or
regulations may apply regarding
the disposal of this product. For
further detailed information,
please contact the retailer where
you purchased this product or
the Legacy Audio Distributor in
your country. A listing of Legacy
Audio Distributors can be found
on the Legacy Audio website
www.legacyaudio.com
or by contacting Legacy Audio
at: 3023 E. Sangamon Ave.,
Springfield, IL 62702,
USA—Phone: [phone].
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Notes:
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©2010 Legacy Audio
3023 E Sangamon Ave.
Springfield, IL 62702
Phone: [phone]
Fax: [phone]
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