Owners Manual For The
Pro 12
Subwoofer System
2
Speaker Placement
7-8
Hooking Up Cables
9-10
Speaker Connections
11-13
Fine Tuning
14-15
Table of Contents
Registration
Owners Record 3
The Cabinetry / Our Commitment 4
Warranty 5
Setup
Page
Unpacking Your Speakers 6
Technology
Specifications 16
3
Owners Record
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: Pro 12
Serial No:
Date of purchase:
Thank you for selecting a Legacy Loudspeaker System. These handcrafted instruments will provide you with many years of listening enjoyment.
4
The Cabinetry / Our Commitment
Handcrafted
Beneath the surface of Metro’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”.
5
Warranty
Legacy Audio supports its customers and products with pride. We cheerfully warrant our loud- speaker
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
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 warranty on dealer stock will extend for a maximum of two years from invoice.
(3) years of coverage.
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.
6
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 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.
7
Speaker Placement
Since the human ear is rather poor at localizing radiation frequencies below 125
Hz, good results may be obtained in a variety of room placements. Careful
adjustment of the convenient rear panel controls will lead to seamless transition.
Low frequency reinforcement occurs whenever woofers are placed near
room boundaries. The distance from the walls, floor and ceiling correspond to
the wavelengths of the frequencies, which will reflect in
phase and thus reinforce bass output. Therefore, the actual dimensions of your
listening room play a definite role in what ultimately arrives at your ear. In fact,
rooms tend to have their own set of favored frequencies.
We can calculate what the most strongly reinforced frequencies in a room will
be by the formula shown below:
Resonant Frequency = (1130 ft/sec) / (ft. between boundaries x 2) For example, a
room with an 8 ft. ceiling height has a strong resonance at: (1130 ft/sec.) / (8 ft. x 2)
= 71 Hz.
8
Speaker Placement
Now, while such reinforcement might actually be beneficial at very low
frequencies, excessive excitation can cause “overhang” or a droning effect at
mid-bass frequencies. A way to minimize excitation of these
resonances is to place your subwoofer asymmetrically relative to room
boundaries. For instance, if the subwoofer is 2 ft from one corner wall, then
place it 1.5 ft to 3 ft from the other.
Placing the subwoofer in a corner will reduce the radiation angle and thus
increase efficiency. It will also excite the maximum number of room modes and
decrease distortion.
A best case scenario is to actually use two subwoofers, one to each side of the
listener. The subs should be placed 90° out of phase with each other. This
improves spaciousness and bass uniformity, with a reduction in room level
peaks.
9
Hooking Up Cables
When using the low-level inputs, we suggest using cables that are
no longer than 5 meters. Longer lengths of RCA cable can result
in greater noise and attenuation of the signal. These can be
connected to the outputs of your preamplifier or dedicated LFE
output.
10
Hooking Up Cables
When utilizing the speaker level inputs, the ideal conductor
would have negligible resistance, inductance and
capacitance. 12 AWG wire or larger is recommended.
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.
11
Speaker Connections
Once you’ve found a place in your room, the next step is connecting the
Pro 12 to your existing system. Listed below you will find 3 options.
Option 1: Connecting the Pro 12 using the stereo Low Level preamp/processor
inputs.
NOTE: if using the low-level inputs, we suggest using cables that are no
longer than 5 meters. Longer lengths of RCA cable can result in greater
noise and attenuation of the signal.
If using Left/Right output jacks from the preamp, the internal circuit module of the
Pro 12 will sum the two channels together. When using the left and right low level
inputs on the subwoofer, the internal crossover of the subwoofer is being used. The
crossover frequency and level will be controlled by the appropriately labeled
controls on the rear panel of the sub.
The Left/Right line output jacks can be used to send a crossed over high frequency
signal.
12
Option 2: Connecting single sub out
Connect the preamp/processor’s “sub out” to the left channel RCA input
(mono).
Option 3: Connecting the Pro 12 using the High Level Inputs (from amplifier)
If using the high level inputs it is highly recommended that you connect
them in parallel with your main left and right loudspeakers.
NOTE: DO NOT use the output from a differential Monobloc amplifier as a
high level input to the subwoofer. When using high level inputs from a
stereo amplifier be sure that they are polarized correctly with the power
amplifier, (positive output to positive input, negative output to negative
input.) Failure to do so may result in damage to your subwoofer, power
amplifier and any associated equipment connected to it. Terminating your
wire leads with banana plugs or gold spade lugs is recommended.
13
Speaker Connections
Powering Up the Pro 12
1. Power Cable: The supplied power cable will plug into the socket on the back
terminal plate of the unit.
NOTE: Try to plug into the same AC circuit as the rest of your audio system, as this will
avoid hum from ground loops.
2. Power Up: In the rear of the subwoofer to the immediate left of the power cable
input is the power switch. This switch controls current flow to the entire unit as follows:
I = Auto On
0 = Off
14
Fine Tuning
Adjusting the Pro 12 Subwoofer
On the back panel of the Pro 12 Subwoofer
you’ll notice four controls: Level, Freq., and
Phase. These allow an extraordinary amount
of control over your subwoofer. These
controls will allow you to tailor the sound of
the sub to your room and integrate with your
main speakers.
Level (Min/Max): This will allow you to adjust
the volume level played by the subwoofer. It
only controls the subwoofer level, not the level
of any of the other loudspeakers in the
system, even if they’re hooked up in parallel.
Freq.: This control allows you to adjust the low
frequency information. The crossover
frequency range of Pro 12 is 40 Hz -200 Hz.
15
Fine Tuning
Phase (0 °/-180 °): This control is essential in the proper setup of your subwoofer. If
not set up properly, your main speakers and subwoofer can actually work against each
other. If operating out of phase the subwoofer and mains will cancel, creating nulls at
some frequencies (primarily upper bass). What is desirable is to have the subwoofer
and the mains operating in phase, relative to the primary listening position. Here is an
effective method of accomplishing this:
While seated at your listening position, have someone sweep the phase control slowly
from one extreme to the other.
Using pink noise or a 50-60 Hz test tone, listen for the strongest output. Now take note
of that setting. Next, play music program material and optimize the level and phase
settings further; adjusting for the smoothest output.
16
Specifications
Applications: Studio or smaller theater sub
System Type: Powered 12" long throw driver with
sub-bass radiator
Mounting: Floor
System Directivity: Omni
Projection Distance: Up to 4,000 cubic ft room
Subwoofer: 12" long throw
Low Freqency Alignment: Mass loaded passive radiator
Freq. Response (Hz, +/-3dB): 25-200 Hz variable
Sensitivity (Room, dB@2.83V): 1.0 volts to rated output
Crossover Freq. (Hz): 40-200 Hz, variable
Inputs: Stereo RCA inputs standard
Dimensions (inches) HxWxD: 18 x 16 x 16
Weight: 47 lbs
Internal Amplification: 500 watts Class D
Peak Output Current: 35 A per channel
Idle Noise: 90 microvolts
Protection Schemes: Thermal reset
Start-up: Auto sensing
17
CE Declaration of Conformity
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
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: +1 217 544-3178.
Notes:
18
©2014 Legacy Audio
3023 E Sangamon Ave.
Springfield, IL 62702
Phone: 800-283-4644
Fax: 217-544-1483
19
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