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