Legacy Deco User manual

Owners Manual For The

Deco

Loudspeaker System

2

Registration

Owners Record 3

The Cabinetry Our Commitment 4

Setup

Unpacking Your Speakers 5

Speaker Installation 6-7

Hooking Up Cables 8-10

Amplification 11-13

Technology

Specifications 14

Table of Contents

Page

3

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: Deco

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

4

Handcrafted

Beneath the surface of Deco’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

5

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.

Unpacking Your peakers

6

Vertical Mounting

- Find the center of one stud and mount the

provided bracket using the provided screws. Place

screws in the holes highlighted in red in figure 2.

- Lift the cabinet and slide the screws on the back of the

cabinet into the keyholes. This may take two people to

accomplish this task.

peaker Installation

Figure 2

7

Horizontal Mounting

- Find the center of the two studs and mount the provided bracket using

the provided screws. Place screws in the holes highlighted in red in figure 3.

- Lift the cabinet and place the screws on the back of the cabinet into the

keyholes. Slide the cabinet to lock it into place. This may take two people

to accomplish this task.

peaker Installation

Figure 3

8

Before you purchase loudspeaker wire, check local building codes to

make sure that the wire is rated to comply with applicable local

safety codes such as UL or CL-2. Use only stranded wire no thinner

than AWG 16. For runs longer than 100 feet, we recommend mini-

mum of AWG 14. When pulling wire, take care not to pull the wire

too fast to prevent stretching the wire or scorching the insulation

from friction. Leave 2 to 3 feet of excess loudspeaker wire at both

ends; it is easier to trim off excess wire than to splice additional wire.

When securing the wire inside the walls, be careful not to pierce the

insulation with nails or staples.

Hooking Up Cables

9

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

10

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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