Velodyne SA-7 Manuel utilisateur

Velodyne

•

VElODYNE ACOUSTICS, INC.

1746JUNCTIONAVE,SANJOSE,CA95112

408-436-0688 •

BOO-VELOOYNE

(800-835-6396)

1:1

TLX:

3716957 "VELO" III

F,A,X

408-436-0311

For

your

records:

Serial

Number

-------

Date

Purchase

Name

Store

OWner's

Manual

Velod~1e

SA-7

Subwoofer

System

----_.

-------

Congratulations

your

purchase

Velodyne

SA-7

Subwoofer

Syst.em.

This

unit

represents

the

state

the

art,

accurate

bass

reproduction.

Read

and

the

instructions

below

insure

safe

and

proper

system

operation.

Warning':

prevent

fire

shock

hazard,

not

expose

this

equipment

rain

moisture.

avoid

electrical

shock

not

open

speaker

enclosure.

Please

observe

all

warnings

the

equipment

itself.

There

are

user

serviceable

parts

inside.

Please

refer

all

serviCE!

questions

your

authorized

Velodyne

dealer.

Please

unpack

the

system

carefully.

Remove

all

staples

used

seal

the

carton

they

can

scratch

the

cabinet.

Please

save

the

carton

and

all

packaging

materials

for

future

use.

Record

the

serial

number

(located

the

left

the

power

switch

the

rear

control

panel)

the

space

provided

above

for

future

reference.

Installation:

There

are

three

installation

options

for

the

SA·-7.

single

SA-7

may

wired

directly

bE!tween

amp

receiver

and

the

main

speakers.

single

SA-7

may

installed

using

the

line

level

subwoofer

output

found

many

surround/signal

processors.

Finally

,one

SA·-7

may

be!

wired

each

channel

between

the

amp

and

the

main

speakers

for

stereo

bass.

Please

observe

the

rear

control

panel

and

proceed

with

the

installation

your

choice:

~ingle

SA-'7

direct

from

Amplifier.

Receiver:

Run

length

speaker

cable

from

the

RIGHT

CHANNEL

speaker

output

your

amplifier/receiver

the

terminals

the

SA-7

control

panel

labeled

AMP

IN/RIGHT.

Run

second

length

cable

from

the.

SA-7

terminals

labeled

SPEAKER OU'lI/RIGHT

the

terminals

t,he

back

RIGHT SATELLITE SPEAKER.

Repeat

the

above

procedure

for

LEFT

CHANNEL.

Observe

caution

not~ce

below.

\'ili

the

above

connection

completed

proceed

t:o

placement

section

below.

single

SA-7

direct

from

mono

output

signal

processor:

Many

signal

processors

and

surround

sound

decoders

have

monaural

subwoofer

outputs

with

built

crossovers.

install

your

SA-7

such

system,

run

single

phono

cable

from

the

subwoofer

output

the

jack

labeled

LINE

IN.

This

confiquration

bypasses

the

SA-7's

adjustable

crossover

network.

not

use

speaker

level

inputs

outputs

conjunction

with

LINE

IN.

vJith

the

above

connection

completed,

proceed

placement

section

below.

stereo

SA-7s:

Run a

length

speaker

cable

from

the

RIGHT

CHANNEL

speaker

output

your

amplifier/receiver

the

terminals

the

SA-7

control

panel

labeled

AMP

IN/RIGHT.

Run

second

length

cable

from

the

SA-7

terminals

labeled

SPEAKER QUT/R[GHT

the

terminals

the

back

the

RIGHT

satellite

speaker.

Repeat

the

above

procedure

the

second

SA-7

using

the

LEF~r

CHANNEL

inputs

and

outputs.

(When

using

stereo

pairs

SA-7s

you

will

use

only

pair

terminals

each

subwoofer,

leaving

pair

unused)

caution:

avoid

damage

your

main

amplifier

sure

'to

make

all

speaker

connections

from

RED

(positive)

RED

and

from

BLACK

(negative)

BLACK.

sure

that

all

connections

are

tight,

and

that

there

arE~

loose

strands

frayed

wires.

Placement:

The

SA-7

operates

primarily

frequencies

below

85Hz.

For

most

listeners

these

low

pitches

are

essentially

non-directional.

This

means

that

you

may

place

the

subwoofer

almost

anywhere,

without

degrading

the

stereo

imaging

characteristics

your

main

speaJeers.

When

using

pair

SA-7s

stereo,

preferable

place

each

subwoofer

adjacent

the

satellite

the

same

channel.

Placing

pair

bookshelf

speakers

directly

top

pair

SA-7s

yields

unparalleled

full

range

biamped

loudspeaker

syst~'?m.

Keep

mind

that

frequency

response

and

output

level

can

greatly

influenced

placement,

depending

the

acoustic

properties

the

listening

room.

Typically

the

SA-7

will

sound

louder

wall

corner.

caution:

The

SA-7

amplifier

built

into

the

woofer

cabinet.

not

place

cabinet

sources

heat

such

furnace

registers,

etc.

The

power

cord

shcmld

routed

such

way

that

will

not

walked

on,

pinched,

com-

pressed.

Due

the

strengt~

the

magnet

the~

SA-7

driver,

recmnmended

that

t.he

unit

placed

least

1/2

feet

from

any

television

other

magnet

sEmsitive

device

such

computer

disk

drive.

Control

Functions:

The

control

panel

the

back

the

SA-7

includes

power

switch,

level

control,

and

microadjustable

low

pass

cross-

over

selector.

Once

the

system

installed

described

above,

the

unit

may

plugged

and

switched

on.

The

subwoofer

level

control

used

adjust

the

amount

bass

information

relation

1:0

the

midrange

and

tre~ble

frequencies.

recommend

that

you

begin

listening

with

the

level

set

at.

the

point

midway

between

MAX

and

MIN.

Play

several

selections

music

and

vary

the

subwoofer

level

until

the

bass

matches

t.he

mids

and

highs

your

satisfaction.

Once

you

set

the

subvwofer

level,

you

simply

use

thE:

volume

control

your

preamp

receiver

and

the

bass

proportion

will

remain

consistent.

The

LOW

PASS

crossover

selector

controls

the

upper

limit

of'

the

SA-7

I S

frequency

respons,~.

For

example,

with

t:he

selector

set

60HZ,

the

subwoofer

begins

rolling

off

above

this

frequency.

Using

the

selector

you

may

match

the

Velodyne

precisely

your

main

speakers.

you

are

using

very

small

bookshelf

speakers

you

may

wish

raise

the

low

pass

high

100Hz.

you

own

large

full

range

loudspeakers,

you

may

find

lower

setting

appropriate.

fine

tuning

the

level

and

crossover

controls,

you

can

create

seamless

blend

between

the

SA-7

and

your

main

speakers,

with

bass

response

and

output

tailored

your

listening

room

and

personal

preference.

~are

your

SA-7:

The

SA-7

designed

provide

years

trouble

free

service.

recommend

using

clean

damp

cloth

for

cleaning

the

cabinet.

Never

use

detergents

abrasive

your

SA-7.

Please

unplug

the

unit

you

not

intend

use

for

prolonged

period

time.

?rot~ction

Circuitry:

Your

SA-7

equipped

with

several

electrical

circuits

designed

••

protect

the

unit

from

damage.

Any

the

following

conditions

will

power

t:he

unit

down

and

will

remain

off

for

seconds

after

the

fault

corrected.

the

amplifier

chassis

reaches

temperature

,excess

140

degrees

Fahrenheit.

there

significant

drop

the

line

voltage.

there

input

signal

which

momentarily

exceeds

the

dynamic

range

the

unit.

Troubleshooting:

your

unit

shuts

itsel1:

down,

please

consider

the

protect:ion

circuits

described

above.

You may

only

need

turn

the

volume

down a

bit.

Remember

that

the

amplifier

built

into

the

subwoofer

box

and

adequate

ventilation

must

maintained.

Overheating

will

shut

the

unit

off.

For

other

problems

refer

the

service

section

below.

service:

For

service

please

contact

your

local

Velodyne

dealer.

The

following

conditions

always

require

service

qualified

personnel:

the

power

cord

damaged.

the

unit

does

not

appear

operate

normally

exhibits

marked

change

performance.

the

unit

has

been

exposed

the

possibility

water

damage.

Velodyne

Acoustics,

Inc.

'r'1-4"'6-'.:Juneti-orr-AvenUe

Sa~'Jose-,-eA

95112

40-8-4:3

6"""0688

Velodyne

and

SA-7

are

registered

trademarks

Velodyne

Acoustics,

Inc.

VELODYNE

SA-7

SUBWOOFER

SYSTEM

SPECIFICATIONS

Amplifier

Type:

Integrated

Class

Power:

100

watts

continuous

RMS,

400

watts

peak.

Monaural

line

level

input

sensitivity/impedence:

700mv/12K

ohms.

Diameter:

Linear

TravE:l:

inches.

9/16"

Driver

Voice

Coil:

Magnet:

Copper;

3/8"

560z.

Con(~:

Resin

impregnated

fiber.

Crossovers

High

Pass:

Low

Pass:

Passive/85Hz

nominal.

6db

per

octave.

Active/Microadjustable

from

60Hz

100Hz.

12db

per

octave.

High

Gain

Servo

The

SA-7

utilizes

the

same

full

H.G.S.

error

correction

circuitry

the

Velodyne

ULD-18,

ULD-15,

and

ULD-12.

t:he

heart

this

technology

small

transducer

called

accelerometer.

This

device,

hybrid

piezoelectric

and

integrated

circuit

technologies,

hand

built

Velodyne

meet

rigid

requirements

for

low

mass,

dynamic

range,

frequency

response,

and

signal-to-noise

ratio.

The

accelerometer

generates

precise

analog

the

speaker's

acoustical

output.

This

signal

directed

soph.isticatE~d

comparator

circuit

that

immediately

detects

any

differences

between

the

"feedback"

signal

and

the

pure

input

from

the

preamplifier.

the

onset

nonlinearity,

the

amplified

signal

the

woofer

corrected.

Servo

Loop

Gain:

Servo

Loop

Feedback

Rate:

Maximum

Distortion

(25Hz

104db):

Frequency

Response:

Driver

Resonant

Frequency:

Air

Volume

Displacement:

Damp

ing

Fac1:or:

Protection:

Cabinet:

Wa.rranty:

26db.

3500

corrections

per

second.

<2%

25Hz

low,

60Hz -

100Hz

high

(depending

crossover

setting).

<4Hz

c.L

>1000

Chassis

Thermal;

Low

Voltage;

Excessive

signal.

Forward

Firing

(H) 33

1/2",

(W)

3/4",

(D)

5/8",

Black

vinyl.

years.

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