Barefoot Footprint01 Manuel utilisateur
Owner’s Manual
Contents page
1.0 Description 01
2.0 Warnings! (please read carefully) 02
3.0 Inputs and Controls 03
4.0 Startup 04
5.0 Protection 04
6.0 Signal Flow Diagram 05
7.0 Positioning 06
7.1 Widening the Stereo Field 07
7.2 Cooling 08
8.0 Maintenance 08
9.0 MEME™ 09
9.1 MEME Voices 09
9.2 MEME™ Voicing Frequency Responses 10
9.3 MEME™ Voice Selector Connection 10
10.0 Dual-Force™ Technology 11
11.0 Frequency Response 12
11.1 Polar Frequency Response 13
12.0 Specifications 14
13.0 Drawings 15
14.0 Limited Warranty 16
14.1 Warranty Conditions 16
14.2 Obtaining Warranty Service 16
14.3 Post Warranty Repair 17
14.4 Warranty Exclusions 17
15.0 Product Registration 17
1
1.0 Descripon
The Footprint01 is a 3-way acve system with 4 drive units housed in sealed enclosures spanning 36Hz to 45kHz
with low distoron, wide dynamic range and ultra-fast transient response. The ring radiator tweeter is
exceponally detailed and produces very wide dispersion beyond the highest audible frequencies. The 4”
midrange is housed in a sealed enclosure for fast transient response. Its ultra-s and lightweight aluminum
cone moves as a perfect piston well beyond its intended frequency range. The 8″ side ring woofers are
housed in a sealed enclosure for fast transient response and feature Barefoot’s renowned Dual-Force™
vibraon cancelaon technology. The net result is incredible transparency and detail across the enre audio
spectrum.
Barefoot’s innovave Mul Emphasis Monitor Emulaon™ technology, or MEME™ (“meam”) for
short, enables the Footprint01 to emulate the frequency, phase and transient responses, dynamic
compression and overall translaon characteriscs of other classic studio monitors.
2.0
The Mains power voltage must never exceed 250 VAC. Connecng the power cord to AC power line
voltages over 250 VAC will damage the amplier and may cause the risk of re. Such damage is NOT
covered under warranty.
Rear panel Mains power input layout.
2
Please read and follow the safety informaon below:
• Do not remove the rear amplier panel. There is a risk of electric shock. No user serviceable parts
are inside. Please refer service issues to a qualied technician.
• Do not operate this device with an ungrounded mains power cable or a mains connecon that is
ungrounded. This may result in personal injury.
• Do not place open ames such as lighted candles on or near this device .
• Do not expose this device to water, rain or high humidity. Do not place objects lled with liquids,
such as vases, on or near this device.
• This speaker requires adequate airow to maintain proper cooling. Do not obstruct airow
around the speaker.
• Do not operate this device in ambient temperatures above 30°C (85°F). Over-temperature may
cause device failure.
Cauon! This speaker is capable of producing sound pressure levels in excess of 85dB which may
cause permanent hearing damage. Always verify that input signal levels are aenuated before
powering on the speaker.
3
3.0 Inputs and Controls
1. [INPUT] XLR connector is designed to receive analog balanced line level audio signals from sources
such as preampliers, sound cards, monitor controllers and mixing consoles. Pin 1 is ed to
chassis ground. Pins 2 & 3 are fully oang dierenal inputs. Pin 3 must be referenced to
ground for single ended input signals. The analog signal is converted to 24bit/192kHz digital audio
via a precision, ultra-high-delity analog to digital converter secon inside the Footprint01.
2. [LEVEL] Eight posion rotary switch adjusts the loudness in precise increments ( +3dB, 0, -1, -2, -3,
-5, -7 and -9dB. ) The 0dB seng corresponds to a sensivity of 90dB at 1 meter distance using a
-15dBv input signal.
3. [MEME IN] 3.5mm stereo phone jack for connecon from MEME™ Selector Switch. See Secon 9
for MEME™ sengs and connecon details. The default seng with no switch connected is Flat.
4. [MEME THRU] 3.5mm stereo phone jack for daisy chain connecon to MEME IN of another
Barefoot monitor. See Secon 9 for MEME™ sengs and connecon details.
5. [USB] The universal serial bus connector is for factory adjustments and calibraons. This
connector is NOT an audio input.
4
4.0 Startup
1. Plug in the grounded mains power cable (see warnings on previous page for details) .
2. Plug in an analog balanced audio signals from a source such as a preamplier, sound card, monitor
controller or mixing console to INPUT XLR connector. Ensure that the audio signal is fully aenuated.
3. Power on the speaker with the rocker switch located on the rear panel above the mains connector. The
LED indicator on the front of the speaker will illuminate Red for a couple of seconds and then turn Aqua.
4. Turn up the audio signal and enjoy!
5.0 Protecon
Limiters
Peak Limiter
The Low and High frequency channels have individual Peak Limiters designed to protect each driver
from high amplitude, short duraon audio input signal spikes that might cause damage due to over
excursion of the voice coil. These limiters are implemented digitally within the DSP in such a manner
that they have zero eect on the audio signal below their thresholds. The front LED indicator light will
ash RED when a Peak Limiter on any of the driver channels is triggered. The duraon of such events
is only a fracon of a second. Therefore, the LED ash may appear pink or orange as the eye naturally
blends the normally aqua-blue color of the LED with the red.
RMS Limiter
The Low and High frequency channels have individual RMS Limiters designed to protect each driver
from long duraon, high amplitude audio input signals that might cause thermal damage due to the
voice coil. These limiters are implemented digitally within the DSP in such a manner that they have
zero eect on the audio signal below their thresholds. The front LED indicator light will ash RED
when a RMS Limiter on any of the driver channels is triggered.
Cauon: Signals large enough to trigger any of the limiters can generate very high sound pressure lev-
els that may result in permanent hearing damage.
Over Current
In the event of a large audio input signal that might damage the ampliers or power supply due to cur-
rent overload, the power supply is designed to enter into Over Current protect mode. This state typi-
cally results from a large, broadband input signal burst that at lines the limiters on all four channels
simultaneously. While the fault persists the amplier power rails shut down, the speaker goes quiet,
and the front panel LED turns red. Once the audio input signal is turned down the speaker should
reboot within a few seconds. If the speaker fails to reboot or the LED light goes out completely, dis-
connect the audio input cable and power cycle the speaker. Verify the signal level is aenuated be-
fore reconnecng audio input cable.
Cauon: Signals that cause Over Current protecon to trigger can generate very high sound pressure
levels that may result in permanent hearing damage.
5
Tweeter
Midrange
Woofers
Ampliers
DACs
24bit/192k
Hz
Limiters
Crossover
and
MEME™
Input
Level
ADC
24bit/192kHz
INPUT
LEVEL
MEME
IN
Clip LED
6.0 Signal Flow Diagram
MEME™ Voice Selector Switch
MEME
THRU
MEME
IN
Passive
Crossover
6
7.0 Posioning
The acousc center of the Footprint01 is located at the LED indicator just above the tweeter. The Footprint01
is designed to work equally well as a neareld or mid-eld monitor. The minimum recommended listening
distance is 3 .0 feet (91 cm). This provides enough distance so the sound waves from the individual drivers can
coalesce and the speaker sounds like a single source. While speaker posioning can oen be dependent on the
nature of the room, a good starng point is to create an equilateral triangle between the two speakers and the
listening posion. The speakers should be angled inward so the tweeter axes aim towards the listener’s ears,
crossing a few inches behind the head.
A “typical” placement scenario might have the speakers posioned 1.5 feet (46 cm) from the front wall, the
LEDs at ear level and the speakers and listening posion forming an equilateral triangle with 4.0 feet (120 cm)
sides. However, every room has its unique characteriscs. Therefore, the opmal listening distances, speaker
height and distances from walls are maers for experimentaon. The Footprint01 is well equipped to work at
a variety of listening distances.
Example: Preferred stereo arrangement.
7
7.1 Widening the Stereo Field
We generally recommend angling the speaker axes in towards the listening posion to create an
equilateral triangle as described above. This yields the most accurate high frequency response and the
sharpest stereo image at the center listening posion. In some cases, however, the listener might
change posions frequently. Or there might be mulple listeners. In such situaons it may be
desirable to have a wider and less focused stereo eld which provides beer coverage over a range of
listening posions. This can be achieved by aiming the speaker axes more forward such that the axes
cross further behind the center listening posion. The gure below illustrates the general principle
and is not meant to be an exact measure of speaker angles or opmal listening posions.
Since the Footprint01 has such wide o-axis dispersion, the horizonal angle relave to the listener can
be changed by up to 10 degrees with less than 1 dB variance in the frequency response across the
audible spectrum. Angling the speakers forward in this manner will somewhat defocus the center
stereo image while providing generally beer imaging over a range of listening posions. For some
users this may be an acceptable compromise.
8
7.2 Cooling
While the amplier modules that drive the Footprint01 are very ecient, the speaker sll generates a
signicant amount of heat that must be dissipated. This heat is transmied to the air via convecon from the
rear amplier plate. In order to ensure proper airow, a minimum of 2.0 inches (51 mm) clearance should be
maintained between the speaker and any large obstrucons like walls. An ambient room temperature below
30°C (85°F) should be maintained. Over-temperature may cause speaker to overheat and shut down.
8.0 Maintenance
Exterior surfaces of this product may be cleaned using a non-abrasive lint-free cloth lightly damped
with water. Disconnect the mains power cable when cleaning to avoid risk of electric shock. Do not use
alcohol-based cleaners.
Driver acve surfaces such as diaphragms and surrounds may be cleaned using dry so bristle brushes.
Driver diaphragms are very delicate and easily damaged. So, proceed with great care. Clean new
sable arst brushes or cosmec brushes work well for this task. Gently brush dust away from the
surface starng at the center of the driver diaphragm and moving radially outward. Avoid applying
inward pressure to the driver diaphragm.
Repairs, maintenance, or other servicing of this product when its interior compartment is exposed
should only be performed under specic advice from Barefoot Sound by a qualied technician or by
the Barefoot Service Center. There are no user-serviceable parts inside this product.
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