Shure HTSSOSPA User Manual

HTSSOSPA

Power

Amplifier

HTSSOSPA SIGNAL PROCESSING STEREO POWER AMPLIFIER

INTRODUCTION

Congratulations! You have chosen the Shure

HTSSOSPA Signal Processing Stereo Power
Amplitier, specially made
your Shure
other elements of the Shure
system are the
Decoder, HTSSOCF Center Front Loudspeaker,
HTSSOLRS Front and Surround Loudspeakers,

and

products of
Division re-create in your home the same
realism and
motion picture theaters and production dubbing
stages.

the
System; the
exclusive Shure-patented techniques in
and digital signal processing electronics.

HTS Decoder for complete system installation,
connection and operation information.

Theory

both the Shure HTS Decoder and Shure
Loudspeakers. The output response of the

'U.S.

HTS Theater Reference System. The

HTS5300 Am-Vector ' wc

HTSSOW Subwoofer Loudspeaker. These

Shure's Home Theater Sound
immediacy

The Shure

main

See the System Manual included with your

HTS5300 Am-Vector Decoder is

control center for your Home Theater

HTS5300 employs the latest

of Operation

The HTSSOSPA amplifier precisely matches

Patent

4,696,036

as

an integral part of

HTS Reference

you hear in the very best

analog

HTS

HTSSOSPA
cular Shure
each of its
selectable Operational Modes. Through
extensive laboratory testing and many
program listening the Shure
achieved
program material and sound delivered to the
room.
the HTSSOSPA to the output connectors, it
corrected for the loudspeakernossover
interaction, loudspeaker-to-room transfer
function and program-material dependence
whether the
music audio. Multiple circuit functions
to control the pr-ration of an accurate
soundfield at the listener positions in a room.
Such attention to detail
Enest audio systems, and the Shure HTS Theater
Reference System sets the new standard.

an amplifier that
quality home theater audio-video presentations
as
control in conventional multi-channel audio only
listening.

Operational Modes are intended for use

is

tailored to correspond to the parti-

HTS loudspeaker system selected in

HTSspeaker-correlated switch-

hours of

HTS Division has

an

optimum correlation between the

As

the program signal

prwm

Consequently, the HTSSOSPA offers the user

is

outstanding for highest

well

as

one that provides unique signal

The

LRSx

and CFx extended low-frequency

is

traced through

is

cinema or conventional

combine

is

present in only the

is

respectively with the
Loudspeakers when the
include a subwoofer.
amplifier low-frequency output
help compensate for the lack of a subwoofer.

The LRS and CF modes are
use with the
speakers, but in a system that
HTSSOW Subwoofer. In these two Modes,
amplifier low frequency output cuts off at 80
to complement the frequency range of the
HTSSOW Subwoofer.

When Channel

SW,

amplifier output extends from 33 to
to match the frequency response of the
HTSSOW Subwoofer.

To further enhance its versatility, each
channel of the
a "Flat" output mode,
with any loudspeaker.

An

excursion luniting circuit in the
HTSSOSPA continuously monitors the audio
signal.

This

circuitry modifies the low-frequency
response only
overexcursion of the loudspeaker connected to
that channel. The characteristics of
depend on the Operational Mode selected since
each Mode is correlated to the

HTSSOLRS and HTSSOCF

HTS system

In

these two Modes,

HTSSOLRS and HTSSOCF loud-

1

is in Operational Mode

HTSSOSPA amplifier

makmg

when

necessary to prevent

does

not

is

extended to

also

intended for

does

include the

80

also

includes

it suitable for

this

circuiy

HTS Loudspeaker

Hz

Hz

use

AmA

CAUTION.

RISK OF ELECTRIC SHOCK

TO REOUCE

THE

RISK

OF

DO NOT REMOVE COVER

NO USER SERVICEABLE PARTS

REFER SERVICING TO OUALFIED SERVICE PERSONNEL

The llghtnrng flash w~th
arrowhead symbol, wlthln an

equilateral

tended to alert the user to

the presence of

"dangerous voltage" wlthtn

the product's enclosure that
may be of
tude to constitute a risk of
electrlc shock to persons

The exclamation point

within an equilateral trangle
is intended to alert the user
to the presence of important
operating and maintenance

(servicing) instructions in

the literature accompanying
the appliance.

ELECTRIC SHOCK

INSIDE

triangle,

un~nsulated

sufflcrent magnt-

IS

rn-

attached at the output terminals.

In

addition, the amplifier features a clipping

cud.

This

protection
distortion to the signal,
clipping" circuits.
the amplifier only when necessary to
term hard clipping.

circuit does not add

as

do ordmry "soft

Instead,

it reduces the

'lhis

circuit

can

gain

avoid long

be

of

selectively disabled by pressing the Protection
Defeat switch for

The slotted control

each

channel desired.

knobs on the HTS5OSPA
are intended to require insertion of a coin to
change their

settings. These knobs resist

accidental changes of position.

Two

LED'S

on the front panel illuminate to
indicate the presence of an audio signal, and
either operation of the protection circuit or
clipping. Power on

is

indicated by the

illuminated power button.

Amplifier

Architectme

To interface with the outside world, the

amplifier input connectors are gold-plated

type

phono

@;

output connectors are gold­plated five-way bin@
with most

high-performance

posts

suitable for use

audio cables.

To receive and generate signals at the

RCA

input

and output connectors respectively, scrupulous

care

has

been exercised

in

design and construc-

tion of the

HTS5OSPA with highest quality
components used throughout. The power
amplifier circuit of each channel uses a hybrid
audio power module construction.
assembly

techque combines semiconductor
chips, normally used in amplifiers
dwrete devices, into a tightly coupled unit on

This

as

separate

compact

a

multilayer high-thermal-conductivity substrate.
The

high

thermal conductivity of the base
substrate results in a close thermal match of the
amplifier output circuits to the voltage and

gain

current

driver stages. Each discrete device
now tracks the other dependent on power
dissipation in the output stage.
possible

with

the discrete separated parts using

normal amplifier construction.

This

is

Thus

the

not

HTSSOSPA takes advantage of one of the benefi&
of monolithic integrated circuits while still
retaining a discrete component topology

as

part
of the hybrid amplifier module. The total
amplifier circuit combines the hybrid module
and special control circuitry to deliver high
current and voltage with low distortion and

precise control of the amplifier circuit in
overload conditions. The output amplifiers in
each channel are complemented by signal
processing circuits which match amplifier
operation to the HTS loudspeakers. The total
combines low noise

high

quality small signal capacitors and resistors,

FET operational amplifiers,

multiple computer grade power supply
capacitors,

high

glass

epoxy

circuit

boards,

and a

current low noise, instrumentation grade

toroidal power transformer.

The result of these circuitry techniques

an

amplifier of exacting specifications, precisely

is

processing the input signal and accurately
matching
many years of enjoyment of the

HTS5O Series Loudspeakers to produce

finest

film

and

music sound stages.

HTSSOSPA

@

FRONT

LWEL:

2,

the normal position for the Level
control
speakers.)

PANEL

For

both

is

0 (no attenuation for

In

the HTS Theater Reference

CONTROLS

Channel 1 and Channel

all

loud-

System, total Volume level and Surround
level are controlled at the HTS Decoder
or its Remote Control.

In

certain

cases,

other level settings

can

also

be

recommended

1.

To compensate for room variations,
see the Balance and Phasing section

HTS5300 Manual for specific

of the
instructions.

2.

For a more visceral low end in
theatrical presentations, either

all

level controls to -3 except for the
HTSSOSW Subwoofer or
levels controls to
Subwoofer.

-6

except for the

In

both setups, leave the

turn

turn

all

Subwoofer channel level conml at
The additional ultra-lowfrequency

0.