Electro-Voice S15 - User Manual

To Next Page

S15

Two-Way Stage Speaker

System

• PRO

circuit provides HF driver

protection

• Integral stand mount

• Constant-directivity 60° x 40°

horn

• 250-watt long-term rms power

capacity

• Roadworthy enclosure with metal

corners, a metal grille and a

durable black-carpet finish

• Dual 1/4-inch phone jack or dual

Neutrik Speakon

inputs

See Connections section

Description

The Electro-Voice S15 is a 250-watt, two-way,

high-efficiency, constant-directivity stage

system featuring a vented, direct-radiating

woofer section. It combines professional

quality Electro-Voice components arranged

in an unusually durable, light-weight enclo-

sure. The result is wide-range accurate sound

reproduction with transparent highs and ex-

tended bass response.

The high-frequency section of the S15 uti-

lizes a 60° X 40° constant-directivity horn

driven by a one-inch throat, wide-bandwidth,

titanium-diaphragm driver. The DH2010A

uses a unique, convex-drive Time Path

phasing plug structure (U.S. Patent

#4,525,604) for smooth and extended high-

frequency performance. The voice coil is

coupled to the diaphragm with EV’s exclu-

sive Resonant Drive

Technology. This in-

creases and smooths the high-frequency re-

sponse and reduces the amount of internal

equalization required for flat frequency re-

sponse. Driver output extends to 20,000 Hz.

A self-resetting high-frequency protection

circuit, EV’s PRO

circuit, is included with

the S15 to prevent against accidental over-

drive and improve system reliability. If the

input power to the high-frequency driver

exceeds the nominal rating, the protection

circuit is activated and reduces the power

delivered to the driver by 6 dB. The system

will remain in this mode of operation until

the input power is reduced to a safe level.

The bass section of the S15 is designed us-

ing Thiele-Small parameters for solid per-

formance to 52 Hz. The 381-mm (15-in.)

SG15 woofer used is a specially designed

unit featuring an extended length voice coil

and high-temperature construction materials.

The system combines professional-quality

components, arranged in an unusually du-

rable Thiele-Small-aligned vented enclosure.

The result is clear and articulate, high-qual-

ity sound.

Speaker Protection

The S15, like all other vented systems, ex-

periences rapidly increasing cone excursion

below the box-tuning frequency, while the

acoustic output decreases rapidly. Therefore,

to protect the S15 and maximize the power

output of the system, it is necessary to insert

an active 32- to 45-Hz high-pass filter into

the circuit. The filter should have a slope of

at least 12 dB per octave. Such subpassband

filters are found in many crossovers and

equalizers manufactured by Electro-Voice,

as well as other commercially available

equipment.

Enclosure Construction

The S15 enclosure is constructed of Road-

Wood

, a structural material that combines

the strength of high-quality plywood with the

density and acoustic damping of particle

board without brittleness. Road-Wood

uses the same principle of crossbanding

veneers, as in plywood, in order to achieve

its very high rigidity. A tough liquid-phe-

nolic resin is blended with long, narrow

strands of hard-wood. Alternate layers are

perpendicularly bonded under intense heat

and pressure to form panels of superior uni-

formity. Unlike many grades of plywood,

Road-Wood

is dimensionally stable, wa-

ter-resistant and free from voids.

A combination of dado cut joints and tough

adhesives ensure a sonically dead enclosure

free from panel resonances.

The densely-woven, industrial-grade, abuse-

resistant carpeting provides a finish that is

both attractive and highly durable. Heavy-

duty metal corner protectors, firmly secured

rubber feet, recessed handles and a protec-

tive metal grille complete the picture and

Main Page

Need help?

Do you have a question about the Electro-Voice S15 and is the answer not in the manual?

Summary

Electro-Voice S15 Description

High-Frequency and Bass Section Details

Details the 60°x40° constant-directivity horn, titanium diaphragm driver, and the 15-inch woofer.

Speaker Protection Circuitry

Explains the PRO™ circuit that protects the HF driver from accidental overdrive.

Enclosure Construction and Materials

Describes the durable Road-Wood™ enclosure with metal corners and carpet finish.

S15 System Connectivity and Performance

Input Connections

Details the dual 1/4-inch phone jacks and optional Neutrik Speakon connectors.

Constant-Directivity and Directivity Data

Explains the 60°x40° dispersion and refers to polar response data.

Power Handling and Amplifier Guidance

Covers EIA power ratings, peak capacity, and amplifier recommendations.

Service Information

Notes that woofer and driver are serviceable from the front.

Technical Specifications and Warranty

Stand Mounting Capabilities

Describes compatibility with standard speaker stands.

Architects and Engineers Specifications

Lists detailed system components, frequency range, and SPL capabilities.

Uniform Limited Warranty Details

Outlines warranty coverage, exclusions, and how to obtain service.

Detailed S15 Specifications

Frequency Response and Limits

Specifies axial frequency response and low-frequency 3-dB points.

Power Handling and Sensitivity

Details long-term power capacity and sound pressure level (SPL).

Directivity, Impedance, and Transducers

Provides directivity index, impedance, and lists woofer and driver complement.

Enclosure and Physical Dimensions

Lists enclosure material, dimensions, and system weight.