Electro-Voice FRX-122 EDS User Manual
FRX-122
High-Output, Compact
Speaker System
• 12-inch, two-way design
• 110° x 60° (asymmetric) horn
coverage
• 300 watts long-term power capacity
• Ring-Mode Decoupling™
• Quick, convenient suspension
• OmniMount
• DH2T driver
• Available in black (BL), white
(WH) and unfinished (UN)
1 OmniMount® is a registered trademark of OmniMount
Systems.
®
Series 100 compatible
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Description
The Electro-Voice FRX-122 is an unusually
compact, two-way, high-efficiency, constant
directivity speaker system designed for indoor
sound reenforcement in commercial installations such as churches, meeting halls, auditoriums and for surround purposes in movie theaters. Capable of producing sound pressure
levels (SPL) in excess of 123 dB at 1 meter
the FRX-122 will give full bandwidth reproduction without sacrificing sonic quality. The
FRX-122 features a 110
asymmetrical vertical dispersion that can be
rotated in the enclosure to produce an upwards
(or downwards) aiming axis of 15
horizontal. The DH2T compression driver
provides smooth extended response to 20 kHz
and features a titanium diaphragm and a unique
convex-drive Time Path™ phasing plug
structure (U.S Patent #4,525,604).
The optimally vented bass section of the
FRX-122 is designed using Theile-Small
parameters for efficient performance to below
75 Hz and utilizes a 300-watt DL12SX
12-inch woofer to provide high excursion with
low coloration.
The FRX-122 is provided with a passive crossover which features 12 dB / octave slopes centered at 1.8 kHz and EV’s self-resetting
° by 60° horn with an
° from the
PRO™ circuit to guard the compression driver
against damage. The system can be easily
converted to be operated in a Bi-Amp mode
by removing the input panel assembly
(6 screws) and moving the four jumpers as
indicated on the crossover. When used in BiAmp mode the woofer uses pins 1+ and 1and the tweeter uses pins 2+ and 2-.
The enclosure is constructed from baltic birch
plywood and is available in three alternative
finishes; FRX-122-BL (black texturlac paint),
FRX-122-WH (off-white texturlac paint) and
FRX-122-UN (unfinished and ready to stain).
The grille is constructed from MDF and is
covered with black cloth (FRX-122-BL) or alternatively natural cloth (FRX-122-UN and
FRX-122-WH).
Ring-Mode Decoupling (RMD™)
The FRX-122 controls both acoustical and
mechanical ring modes to provide dramatically increased intelligibility, using techniques learned from the development of the
Electro-V oice X-Array™ concert speakers.
There is much less coloration of the sound
from resonating sources, leaving only the
intended sound to be heard by the audience.
Frequency Response
The FRX-122 axial frequency response was
measured in Electro-Voice’s large anechoic
chamber at a distance of 10 feet with a swept
sine-wave input (see Figure 1). The two
responses show the two alternate rotational
positions of the high frequency horn.
Directivity
The directional characteristics of the
FRX-122 were measured in Electro-Voice’s
large anechoic chamber. The test signal was
one-third-octave filtered pink noise at the
frequencies indicated. A full spherical measurement system was used. All directional
information was measured at 20 feet.
Figure 2 illustrates the horizontal and vertical
polar responses.
Figure 3 shows the horizontal and vertical
beamwidths. Beamwidth is the angle at which
the horizontal and vertical polar responses have
decreased in level by 6 dB when compared
with the axial frequency response.
Figure 4 illustrates the total directivity of the
FRX-122. The directivity factor R
relative value, at a point, of the FRX-122 output when compared to an ideal spherical
response. The directivity index, D
lated by D
= 10 log10Rθ.
i
(Q) is the
θ
, is calcu-
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FR10-2B SPECIFICATION GRAPHICS
FRX-122 High-Output, Compact Speaker System
Power-Handling Test
Electro-Voice components and systems are
manufactured to exacting standards, ensuring
they will hold up, not only through the most
rigorous of power tests, but also through continued use in arduous, real-life conditions. The
EIA Loudspeaker Power Rating Full Range
(EIA RS-426-A 1980) uses a noise spectrum
which mimics typical music and tests the thermal and mechanical capabilities of the components. Electro-Voice will support relevant
additional standards as they become available.
Extreme, in-house power tests, which push the
performance boundaries of the system, are also
performed and passed to ensure years of
trouble-free service.
Specifically, the FRX-122 passes EIA RS-426-A
1980 with the following values:
R
= 6.0 (1.15 x RE) ohms
SR
P
= 300 watts
E(MAX)
Test voltage = 42.4 volts rms,
FRX-122 High-Output, Compact Speaker System
The "peak" power-handling capacity of a
woofer is determined by the peak test voltage
amount. For the FRX-122 an 84.8-volt peak
test voltage translates into a 1,200-watt shortterm-peak power-handling capacity. This is the
equivalent of four times the "average" powerhandling capacity, and is a peak that can be
sustained for only a few milliseconds. However, this sort of short duration peak is very
typical in speech and music. Provided the
amplifier can reproduce the signal accurately,
without clipping, the system will also perform
accurately and reliably, even at these levels.
Use in Cinemas
The FRX-122 has features which make it particularly suitable for use in cinema surround
sound. It is black to complement most theater
interiors. The WCB-1 U-bracket provides a
cost-effective and safe method of suspending
the FRX-122 at the correct (15°) angle. The
high dynamics and high power handling
offered by professional-grade components
make it especially suitable for digital signals.
Suspending the FRX-122
The FRX-122 is fitted with ¼-20 threaded inserts and can be suspended in two ways:
84.8 volts peak
1. The WCB-1 is a U-bracket designed for
the FRX-122 that facilitales either horizontal or vertical mounting -see Figure 6
2. OmniMount
Four ¼-20 threaded inserts are located in
the rear panel to allow the use of the
OmniMount
A safety chain should be used to ensure
safe operation. (Obtain OmniMount
specifications for full instructions.)
It is the responsibility of the installer to ensure the integrity of the mounting surface.
The grille of the FRX-122 is securely attached
on the front of the cabinet with four screws.
Architects' and Engineers' Specifications
The loudspeaker system shall be a two-way
full-range design consisting of a 12-inch
woofer, a high-frequency compression driver
on an injection molded constant directivity
horn and a dividing network having a crossover frequency of 1.8 kHz. The system shall
be configurable in a Bi-Amp mode through
internal switches in the crossover network.
The loudspeaker shall meet the following performance criteria; Power handling, 300 watts,
based upon ANSI/EIA RS-426-A 1980 standard for full-range loudspeaker systems; Frequency response smooth and usable at high
SPL levels from 75 Hz to 20 kHz; Pressure
sensitivity, 99 dB SPL for 1W at 1M; Impedance, 8 ohms nominal, 6 ohms minimum.
The system shall have a distribution pattern with 110
3 kHz to 20 kHz and 60
cally from 3 kHz to 20 kHz with asymmetrical coverage in the vertical plane. The enclosure shall be constructed from baltic birch
plywood and braced appropriately, and the
grille will be constructed from MDF and cloth
covered. The dimensions shall be 58.4 cm
(23.0-in) high by 45.1 cm (17.8-in) wide by
22.9 cm (9.0-in) deep. Net weight shall be
20.9 kg (46 lbs). The system shall be the
Electro-Voice FRX-122-BL (Black texturlac
paint with black cloth grille), FRX-122-WH
(White texturlac paint with natural cloth grille)
or the FRX-122-UN (Unfinished ready for
staining with natural cloth grille).
®
Series 100 support system.
®
Series 100 support system.
° nominal horizontally from
° nominal verti-
Limited Warranty
Electro-Voice products are guaranteed
against malfunction due to defects in materials or workmanship for a specified period,
as noted in the individual product-line
statement(s) below, or in the individual
product data sheet or owner’s manual, beginning with the date of original purchase.
If such malfunction occurs during the specified period, the product will be repaired or
®
replaced (at our option) without charge. The
product will be returned to the customer prepaid. Exclusions and Limitations: The
Limited W arranty does not apply to: (a) exterior finish or appearance; (b) certain specific items described in the individual product-line statement(s) below, or in the individual product data sheet or owner’s
manual; (c) malfunction resulting from use
or operation of the product other than as
specified in the product data sheet or
owner’s manual; (d) malfunction resulting
from misuse or abuse of the product; or (e)
malfunction occurring at any time after repairs have been made to the product by anyone other than Electro-V oice Service or any
of its authorized service representatives.
Obtaining Warranty Service: To obtain
warranty service, a customer must deliver
the product, prepaid, to Electro-Voice Service or any of its authorized service representatives together with proof of purchase
of the product in the form of a bill of sale or
receipted invoice. A list of authorized service representatives is available from
Electro-Voice Service at 600 Cecil Street,
Buchanan, MI 49107 (800/234-6831 or
F AX 616/695-4743). Incidental and Con-
sequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the
customer. Electro-Voice shall not be liable
for any incidental or consequential damages
including, without limitation, injury to persons or property or loss of use. Some states
do not allow the exclusion or limitation of
incidental or consequential damages so the
above limitation or exclusion may not apply to you. Other Rights: This warranty
gives you specific legal rights, and you may
also have other rights which vary from state
to state.
Electro-V oice Speakers and Speaker Systems are guaranteed against malfunction
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FR10-2B SPECIFICATION GRAPHICS
FRX-122 High-Output, Compact Speaker System
due to defects in materials or workmanship
for a period of five (5) years from the date
of original purchase. The Limited W arranty
does not apply to burned voice coils or malfunctions such as cone and/or coil damage
resulting from improperly designed enclosures. Electro-Voice active electronics as-
Figure 1— Axial Frequency Response
(anechoic environment, 1 watt at 1 meter
into mid band)
Horn Up
Horn Down
sociated with the speaker systems are guaranteed for three (3) years from the date of
original purchase. Additional details are
included in the Uniform Limited Warranty
statement.
For warranty repair or service information, contact the service repair department
at: 616/695-6831 or 800/685-2606.
For technical assistance, contact Techni-
cal Support at 800/234-6831 or
616/695-6831, M-F , 8:00 a.m. to 5:00 p.m.
Eastern Standard Time.
Specifications subject to change without
notice.
FRX-122 High-Output, Compact Speaker System
Figure 2—One-Third-Octave Polar
Response (anechoic environment)
63 Hz 80 Hz
HORIZONTAL
VERTICAL
5 dB per Division
100 Hz
125 Hz 160 Hz 200 Hz
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