Electro-Voice FR300 Three-Way High-Level Speaker System
A MARK IV company
Specifications
Frequency Response: 10 Feet on Axis, Swept Sine Wave, Half-Space Anechoic Environment: 38-16,000 Hz ±3 dB
Usable Frequency Response: 33-18,000 Hz
Half-Space Reference Efficiency: 4.5%
Long-Term Average Power Handling Capacity: 200 watts (per EIA Standard RS-426A)
Sound Pressure Level at 1 Meter, 1 Watt Input: 100 dB (Anechoic Environment, Band-Limited Pink Noise Signal, 300-2,000 Hz)
Dispersion Angle (Included by 6 dB Down Points on Polar Responses):
- 250-500 Hz: 130°±30°
- 500-20,000 Hz: 110°±60°
Directivity Factor R (Q), 800-16,000 Hz Median: 8.1 (+7, -5.5)
Directivity Index D₁, 800-16,000 Hz Median: 9.1 dB (+2.7 dB, -4 dB)
Distortion (0.1 Full Power Input):
- Second Harmonic (100 Hz): <1%
- Second Harmonic (1,000 Hz): <1%
- Second Harmonic (10,000 Hz): <3%
- Third Harmonic (100 Hz): 2%
- Third Harmonic (1,000 Hz): 3%
- Third Harmonic (10,000 Hz): 5%
Distortion (0.01 Full Power Input):
- Second Harmonic (100 Hz): <1%
- Second Harmonic (1,000 Hz): <1%
- Second Harmonic (10,000 Hz): 2%
- Third Harmonic (100 Hz): <1%
- Third Harmonic (1,000 Hz): 1%
- Third Harmonic (10,000 Hz): <1%
Transducer Complement:
- High Frequency: ST350B
- Mid Frequency: Vented Midrange
- Low Frequency: EVX-15
Box Tuning Frequency: 40 Hz
Crossover Frequencies: 600 Hz and 4,000 Hz
Crossover Slope: 12 dB per octave
Impedance:
- Nominal: 8 ohms
- Minimum: 4.7 ohms
Input Connections: Screw terminals (#8-32) on barrier strip
Enclosure Materials and Colors
Oak-grain vinyl on particle board with beige cloth grille.
Mounting
Hanging via eight 5/16-18 threaded inserts.
Dimensions
78.1 cm (30.75 in.) high, 63.5 cm (25 in.) wide, 45.7 cm (18 in.) deep.
Weight
Net Weight: 50 kg (110 lb)
Shipping Weight: 54 kg (118 lb)
Description
The Electro-Voice FR300 is a three-way, high-efficiency speaker system designed for indoor sound reinforcement in commercial installations, such as churches, meeting halls, and small auditoriums. It combines professional quality components, highlighted by the VMR® vented midrange speaker, with a Thiele-Small aligned vented enclosure for extended low bass. The result is clear and articulate high-quality sound.
The high-frequency section of the FR300 employs the ST350B constant-directivity tweeter featuring wide and uniform high-frequency coverage coupled with an auto-limiting protection circuit.
The midrange is the EV VMR speaker built with a high-efficiency flat wire coil and high temperature construction materials.
The bass section of the FR300 is designed using Thiele-Small parameters for efficient performance to below 40 Hz. The 15-inch woofer used in the system is an EVX-15 unit featuring beryllium copper lead wire and an extended length, edgewound voice coil protected by the unique EV Thermo Inductive Ring (TIRTM). The part of the magnetic structure adjacent to the coil is insulated, using the exclusive EV PROTEFTM process. The coil is driven by a massive (16-lb) magnetic structure.
An unusual feature of this system is the vented midrange used to bridge the frequency region between the specialized EVX woofer and the ST350B tweeter. This EV innovation represents a unique way of providing high acoustic output and efficiency from a compact direct-radiator form of loudspeaker. It is capable of providing large amounts of acoustic output from a small package that can be gracefully integrated into a medium-sized loudspeaker system. It does so without having the "honky" sound quality and upper-range beaminess often associated with small-format horn transducers used to cover midrange frequencies with a bandpass below 1,000 Hz.
The FR300 cabinet is wood-grain (vinyl wrapped) particle board with beige cloth stretched over a plywood frame. This oak-grain vinyl enclosure with detachable beige grille avoids the "utility" appearance of separate components, with colors and styling that complement most interiors. In addition, the grille cloth may be easily removed from the grille frame and replaced when a custom cloth color is required.
The combination of the 15-inch woofer, vented midrange, and high-frequency tweeter provide the wide and smooth overall response shown in Figure 1. This response was measured at ten feet, using a four-volt input in an anechoic chamber and was measured using a sine wave. No external equalization was used.
The polar response of the FR300 speaker system at selected 1/3-octave bandwidths is shown in Figure 2. These polar responses were measured in an anechoic environment at ten feet using 1/3-octave pink noise inputs. The frequencies selected are fully representative of the polar response of the system. Beamwidth of the system utilizing the complete 1/3-octave polar data is shown in Figure 3. R(Q) and directivity index (D) are plotted in Figure 4.
Power Handling Capacity: Electro-Voice was the first U.S. manufacturer to develop and publish a power test closely related to real-life conditions. The EIA test spectrum is applied for eight hours. This procedure provides a rigorous test of both thermal and mechanical failure modes.
Mounting
The cabinet is supplied with 5/16-18 threaded inserts which will allow horizontal or vertical mounting from chains. For horizontal mounting or when wide vertical coverage is desired, the tweeter may be rotated 90° by removing and replacing its 8 mounting screws. The user must supply eyelet bolts, "S" hooks, and chains.
Warranty (Limited)
Electro-Voice Speakers and Speaker Systems are guaranteed for five years from date of original purchase against malfunction due to defects in workmanship and materials. Unit will be returned prepaid. Warranty does not extend to finish, appearance items, burned coils, or malfunction due to abuse or operation under other than specified conditions. Some states do not allow the exclusion or limitation of incidental or conse- quential damages, so the above exclusion may not apply to you. Repair by other than Electro-Voice or its authorized service agencies will void this guarantee.
Service and repair address for this product: Electro-Voice, Inc., 600 Cecil Street, Buchanan, Michigan 49107.
Specifications subject to change without notice.
