Expression Manual

Expression Manual
Owners Manual For The
Expression
Loudspeaker System
Table of Contents
Registration
Owners Record
The Cabinetry / Our Commitment
Warranty
Setup
Unpacking Your Speakers
Speaker Installation
Hooking Up Cables
Amplification
Foot Installation
Speaker Connections
Fine Tuning
Page
3
4
5
6
7
8-9
10-12
13-16
17-21
22
Technology
Specifications
23
2
Owners Record
Thank you for selecting a Legacy Loudspeaker System. These handcrafted
instruments will provide you with many years of listening enjoyment.
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: Expression
Serial No: _________________________
Date of purchase: __________________
Register your product at legacyaudio.com/register
Share your Legacy speakers with the Legacy community. Post your
Legacy experience and system photos at facebook.com/LegacyAudio.
Like the page to continue receiving the latest Legacy announcements.
3
The Cabinetry / Our Commitment
Handcrafted
Beneath the surface of Expression’s elegant exterior lies rigid MDF construction.
Interlocking joinery maximizes the strength of the cabinet parts.
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”.
4
Warranty
Legacy Audio supports its customers and products with pride. We cheerfully warrant our loudspeaker products we manufacture from defects in materials and workmanship for a period of seven
(7) years. Electronic components such as internal amplifiers and digital processors are covered for
three (3)years. Please register your product with Legacy Audio. Should you require service Legacy
will require a proof of purchase in order to honor the warranty - so please keep your receipt.
•
•
•
•
The warranty applies to the original owner and is not transferable.
The warranty applies to products purchased from an “Authorized Legacy Dealer”.
The warranty on active components such as digital processors or internal amplifiers is limited to three
(3) years of coverage.
The warranty on dealer stock will extend for a maximum of two years from invoice.
The warranty does not cover transportation costs of product to or from the customer, distributor or
dealer, or related shipping damage.
Exclusions from Warranty
The following situations or conditions are not covered by the Legacy Audio warranty:
• Accidental damage, electrical abuse or associated equipment failure.
• Use inconsistent with recommended operating instructions and specifications
• Damage caused by modification or unauthorized service
• Costs associated with the removal and reinstallation of defective products. Consequential damage to
other products.
• Normal wear such as fading of finishes due to sunlight.
5
Unpacking Your Speakers
Your new speaker system has been very carefully packaged to insure
that it travels to you safely. Each speaker is protected by a doublewall outer carton with heavy V-board corner protectors. Custom fitted
foam end caps are used to protect the elegant cabinetry, and a
custom bag is included to provide further protection. Please save this
packing for future transportation. If cartons become damaged or
misplaced, new ones can be purchased from Legacy Audio.
6
Speaker Placement
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 the axis normal to the loudspeaker baffle. Assuming a listener distance of about ten feet, begin by placing the speakers approximately 7 feet apart and about 1 – 3 feet from the wall behind them. In
most rooms this will afford a speaker position at least 2 feet or more from
the side walls. The amount of recommended "toe-in" is a function of the listening angle. As the overall listening angle increases from 40 degrees, the
amount of toe-in should increase. Your Legacy speaker is optimized for a flat
response in the far field. Best results are obtained vertically with the listener's ear at tweeter level with the loudspeakers gently toed in toward the
listener. Increasing the degree of toe-in is recommended when placement
next to sidewalls is required. Placing the loudspeaker or the listener near a
room boundary will generally increase low frequency impact. If you are
forced to position one or both of your loudspeakers in a corner, be prepared
to reduce bass output via the control switches on the rear terminal plate of
each loudspeaker. You may also wish to reduce low frequency output with
your preamp's bass tone control.
7
Hooking Up Cables
The ideal conductor would have negligible resistance, inductance
and capacitance. The table below shows how a few actual speaker
cables measure up.
Cable
12 ga.
14 ga.
16 ga.
18 ga.
Ωs/ft
0.0033
0.0048
0.0079
0.0128
pF/ft
24
17
16
28
µH/ft
0.21
0.13
0.18
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.
8
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 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.
9
Amplification
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.
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 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%)
11
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.
12
Foot Installation
Step 1Carefully place your speakers on their sides
Step 2 Locate the cone feet set. It will be inside the foam pieces
that held the speaker in the box.
13
Foot Installation
Step 3Place the insert adapter into the rubber cone.
Step 4 Thread the cone insert into the cabinet.
14
Foot Installation
Step 5Tighten the cone insert. If you do not want the spikes, you
may stop here.
Step 6 Place the leveling washer onto the cone.
15
Foot Installation
Step 7Install the washer and cone onto the speaker. Adjust the
cone until your speaker is level.
Foot Set Specifications
M12, 1.25mm thread size
16
Speaker Connections
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.)
Connect each channel of your 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.
17
Speaker Connections
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).
Passive Biamping
This option can yield even better results than biwiring due to broader distribution of
power requirements. Passive biamplification allows low frequency current to be
routed to a separate channel of amplification, reducing strain on the satellite amplifier and preventing subwoofer back-EMF from modulating with the upper frequencies.
There are two types of passive biamplification; Vertical biamping (which requires two
identical stereo amplifiers or four MonoBlocs) and Horizontal biamping (which does
not require identical amplifiers).
18
Speaker Connections
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 configuration improves channel separation and can improve imaging slightly. If your preamp does not
have two sets of left/right outputs, you will need a pair of Y-adapters or a signal splitter, such as a dual amp balancer, which will also allow adjustment of subwoofer/
satellite input levels.
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 subwoofer
section. The biggest drawback of such a marriage of amplification is that the two amplifiers may have different input sensitivities or output polarities. Differences in the
input sensitivities may be overcome by using a dual amp balancer. This unit allows independent balancing of the left subwoofer/satellite ratio and right subwoofer/satellite
ratio. 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
19
Speaker Connections
either the subwoofer or satellite binding posts. NOTE: This only applies to loudspeak-
ers 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 polarity when connecting the speaker wire to a powered subwoofer.
Active Biamping
This option requires the utilization of an electronic (powered) external crossover. Active biamplification is the most appealing means of interfacing a subwoofer/satellite
system due to the control possibilities offered, but can also be the most costly. An active crossover is inserted between the preamplifier outputs and the inputs of two stereo amplifiers. Vertical or horizontal biamping considerations are also applicable
here. A well designed active crossover will offer the user independent high pass /
low pass turnover frequencies for optimally blending the satellites with the subwoofer
sections of the speaker system. Other features usually found are separate level controls for the high pass or low pass sections and a choice of inverted or non-inverted
low frequency outputs (needed when strapping an amplifier to mono).
20
Speaker Connections
Also helpful is bass equalization and subsonic filtering. When cascading active filters
with the existing passive filters within the speaker system, be sure to allow for adequate frequency overlap. For instance, if the passive crossover is set at 500 Hz, select
a low pass corner frequency of 600 Hz and a high pass corner frequency of 450 Hz to
prevent a suck out in the response at 500 Hz. The controlled distribution of power afforded by the active crossover results in less amplifier strain (better clarity), greater
dynamics, and lower intermodulation distortion. However, a basic understanding of
crossover slopes and crossover frequencies within your loudspeaker will be needed to
implement the active crossover successfully.
21
Fine Tuning
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.
TREBLE Trim: - Nominally flat in the up position
- Negative 2dB at 10 kHz in the down position
(shelving for brighter rooms)
BASS Trim:
- Nominally flat in the up position
- Negative 2dB at 60 Hz in the down position
(also raises impedance for budget receivers)
22
Specifications
System Type:
3 driver, 2.5 way
Tweeter:
1” spiral neo ribbon
Midwoofer:
8” Silver/Graphite woven diaphragm, cast
frame, with phase compensation plug
Woofer:
8” Silver/Graphite woven diaphragm, cast
frame, with phase compensation plug
Low Frequency Alignment:
Assisted 5th order Butterworth vented
Frequency Response:
38 Hz – 22 kHz
Impedance:
4 Ohm
Sensitivity:
(Room, dB at 2.83V) 94 dB
Recommended Amplification:
10-250 Watts
Crossover Frequency:
500, 3K
Dimensions (H x W x D):
38.5” X 10.75” X 10.75”
Weight:
68 lbs
23
CE Declaration of Conformity
WEEE Compliance
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
All information contained in this manual is accurate
to the best of our knowledge at the time of
publication. In keeping with our policy of ongoing
product improvement, we reserve the right to
make changes to the design and features of our
products without prior notice.
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: +1 217 544-3178.
Notes:
25
©2017 Legacy Audio
3023 E Sangamon Ave.
Springfield, IL 62702
Phone: 800-283-4644
Fax: 217-544-1483
26
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