Electro-Voice Duplex EP925-60T, Duplex EP925-100T, Duplex EP950-60T, Duplex EP950-100T Quick Start Manual

Impedance Response

Beamwidth vs Frequency

Frequency Response

Directivity and Q

General Product Description

The Electro-Voice® EP925 series Duplex® loudspeaker systems
are complete two-way ceiling loudspeaker packages. The package
consists of a rear enclosure, grille, and a two-way 12-in. Duplex®
loudspeaker which features a rectangular-coverage 90° x 90° horn
driven by a 1-in. compression driver coaxially mounted to a 12-in.
low-frequency cone driver with a high-temperature voice coil
assembly. The system is offered in either a 60-watt or 100-watt
line-matching transformer package. Each system utilizes a
dual-section crossover network with a self-resetting protection
circuit for the compression driver.

The EP925-60T utilizes a transformer that offers a selection of 7.5.
15, 30 and 60 watts delivered to the loudspeaker system using
either 25-V, 70-V or 100-V lines.

The EP925-100T utilizes a transformer that offers a selection of
50, 70, 100, 140 and 200 watts delivered to the loudspeaker
system using either 70-V or 100-V lines.

The rear enclosure provides an optimum internal volume,
ensuring extended low-frequency performance. It is constructed
from rugged heavy-gauge, cold-rolled steel, finished with a
black-wrinkle epoxy powder coat. In addition, the interior is lined
with a polyester batting blanket to ensure optimum acoustic
performance. Three hanging points are provided through the
rear cover each consisting of a 3/4-in. length of 3/8-16 threaded
rod or “all-thread” (see Mounting the System in a Ceiling). For the
EP925-60T and EP925-100T transformer models, the rear cover
provides access to both a dual terminal block for direct connection
to the speaker and an 8-pin terminal block that allows direct
connection to each of the transformer taps.

EP925-60T

EP925-100T

Duplex

Loudspeakers Systems

The attached grille is constructed from 16 gauge perforated
cold-rolled steel, finished in a semi-gloss black powder-coated
enamel.

These components have been designed to work together as a
complete system in a wide range of different ceiling constructions.
They provide wide dispersion, high efficiency, high-maximum
output, ease of installation and wide-range reproduction of music
or voice.

®

Ceiling

COMMERCIAL

USA 12000 Portland Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Canada 705 Progress Avenue, Unit 46,Scarborough, Ontario, Canada, M1H2X1,Phone: [phone], FAX: [phone]
Switzerland Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: [phone]. FAX: [phone]
Germany Hirschberger Ring 45, D94315, Straubing, Ger many, Phone: [phone], FAX: [phone]
France Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], FAX: [phone]
Australia Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: [phone], FAX: [phone]
Hong Kong Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], FAX: [phone]
Japan 2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: [phone], FAX:[phone]
Singapore 3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: [phone], FAX: [phone]
Mexico Av. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: [phone], FAX: [phone]
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], FAX: [phone]
Africa, Mid-East 12000 Portland Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Latin America 12000 Portland Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]

www.electrovoice.com • Telex Communications, Inc. • www.telex.com

© Telex Communications, Inc. 02/2001

Part Number 38109-860 Rev A

For customer orders, contact the Customer Service department at

For warranty repair or service information, contact the Service

For technical assistance , contact Technical Suppor t at 866/78 AUDIO

Please refer to the Engineering Data Sheet for warranty information.

Specifications subject to change without notice.

U.S.A. and Canada only.

800/392-3497 Fax: [phone]

Repair department at 800/685-2606

Specifications:

Frequency Response: ....................................................... 60-20,000 Hz

(see Figure 1,Note 2)

Pressure Sensitivity: ............................................................. 97 dB SPL

(1 W, 60 Hz-20 kHz, ref. 20 µPa)

Beamwidth, 500 Hz - 20 kHz:

Horizontal & Vertical:............................................... 90° (+15°, - 40°)

Directivity Factor, R

10.4 (+7.7, - 4.8)

Directivity Index, D

10.2 dB (+2.7, - 3.3)

Power Handling: ...................................................................... 250 watts

(105 Hz-15 kHz, AES method)

Maximum Long-Term Output: ............................................. 120 dB SPL

(16 watts input, 1 m, ref. 20 µPa)

Impedance:

Nominal: ............................................................................ 8.0 ohms

Minimum at 650 Hz: .......................................................... 7.0 ohms

Components:

LF: ....................................... 305 mm (12 in.) high-efficiency woofer

HF: ................................... 25.4 mm (1 in.) exit high-efficiency driver

(Q), 500 Hz-20 kHz

θ

500 Hz-20 kHz

i

Input Terminals:
EP925-60T & EP925-100T

Dual terminal barrier strip with screw type connector for direct
connection to woofer and an eight-way barrier strip with screw­type connector for transformer connections.

Dimensions:

Diameter: .......................................................... 451 mm (17.75 in.)

Depth: .................................................................... 381 mm (15 in.)

Net Weight:

EP925-60T EP925-100T

25.2 kg (55.5 lb) 27.4 kg (60.5 lb)

Shipping Weight:

EP925-60T EP925-100T

27.9 kg (61.5 lb) 30.2 kg (66.5 lb)

Finish: ................................................. Black-wrinkle powder coat enamel

Accessories: .............................................. EBK-2 hardware mounting kit

............................................................ CG-1 24-in. x 24 in. white grille kit

Mounting the System in a Ceiling

Three hanging points are provided through the rear cover
consisting of 3/4-in. length of 3/8-16 threaded rod (“all-thread”) for
use with either the optional EBK-2 kit or by many other obtainable
hardware options that can utilize the 3/8-16 male thread.

It is imperative, before beginning the installation, to determine the
type of material employed in the ceiling to verify that it can safely
accommodate the weight of the system(s).

It is recommended to use all three hanging points with the optional
EBK-2 kit, which consists of three 3/8-16 eye-nuts which in turn
are screwed securely into each of the “all-thread” protruding through
the rear of the enclosure. From these points, the system can be
suspended from a girder, beam or appropriate ceiling fixture
depending on where the system is being used.

If the speaker system must be mounted inconspicuously, the system
can be suspended above a drop ceiling with an existing tile
replaced with the optional CG-1, 24-in. x 24-in. white powder-coated
perforated grille kit.

Selecting a Transformer Tap

The transformer tap of choice can be obtained by making
connection between the ground terminal (# 1) and any of the
wattage taps indicated on the input label. For the EP925-I00T, either
70-V or 100-V lines can be used. For the EP925-60T, either 25-V,
70-V or 100-V lines can be used — refer to the input panel label to
determine the appropriate wattage for the line voltage used.

Architects’ and Engineers’ Specifications

The loudspeaker systems shall be of the ceiling Duplex® type
consisting of a rear enclosure, front grille, transformer (for
transformer models) and 12-inch Duplex® type loudspeaker. The
loudspeaker will feature a single high-frequency compression
driver coaxially mounted to a single 305-mm (12-in.) high-power
woofer using a 90° x 90° coverage pattern horn. The loudspeaker
system shall meet the following criteria: power handling shall be
250 watts of band-limited pink noise with 6 dB crest factor. Frequency
response shall be smooth and uniformly usable from 60 Hz to 20

kHz. Pressure sensitivity shall be 97 dB SPL when measured at one
meter on axis with one watt of pink noise.

The Duplex® ceiling loudspeaker packages shall be the Electo­Voice® models EP925-60T with 60-watt transformer and
EP925-100T with 100-watt transformer.

Transformer Specifications

EP925-60T:

Frequency Response: ......................... 60 Hz to 15 kHz, +/-1 dB

Insertion Loss: .................................................................. <0.5 dB

Primary Voltage: ............................................................70.7 Vrms

Secondary Impedance: ............................................... 8-16 ohms

Wiring Diagrams

EP925-100T:

Frequency Response: ......................... 20 Hz to 20 kHz, +/-1 dB

Insertion Loss: .................................................................. <0.5 dB

Primary Voltage: ............................................................70.7 Vrms

Secondary Impedance: ............................................... 8-16 ohms

Primary Impedance and Power Drawn:

EP925-60T EP925-100T

667 ohms / 7.5 watt 99 ohms / 50.0 watt
333 ohms / 15.0 watt 71 ohms / 70.0 watt
166 ohms / 30.0 watt 50 ohms / 100 watt

83 ohms / 60.0 watt 36 ohms / 140 watt

25 ohms / 200 watt

Versions: EP950-60T, EP950-I00T

Dimensions

Polar Response Charts

Harmonic Distortion

at 0.01 rated power (3.0 W)

Harmonic Distortion

5

at 0.1 rated power (30 W)

5