Legacy Whisper XD Bedienungsanleitung

Owners Manual For The

Whisper XD

Loudspeaker System

Registration

Owners Record 3

The Cabinetry Our Commitment 4

Setup

Speaker Placement 5

Hooking Up Cables 6-7

Amplification 8-10

Speaker Connections 11-12

Installer Calibration Instructions 13

Whisper Wave Launch Processor 14

Technology

Designer’s Notes 15-16

Specifications 17

Table of Contents

Page

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 XD

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

Handcrafted

Beneath the surface of Whisper XD’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

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:

Ideal Speaker spread = (0.8 to 1.2) 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 ambience 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

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

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

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

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

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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