Velodyne FSR-18 Manuel utilisateur

"If you know subwoofers, you know about Velodyne. "

-Corey Greenberg

Home Theater Technology/February 1995

Face

Off

: Comparison

of

five subwoofers

"

...

the clean,

full,

andextended quality

of

the F-1800R's bass caused

me

to

gasp with the recognition that I was finally listening

to

a real subwoofer."

"

...

our entire listening room swelled with solid, satisfying bass, as

if

both

musician and instrument were

in

the room. "

"

..

.scenes such as

the

pre-battle sequence

in

Braveheart

...

mayvery well

have threatened

the

room's structural integrity had

we

not backed off the

volume a bit

...

"

-AI Griffin

Home Theater/December 1996

Gear Guide

Velodyne Acoustics, Inc.

1070 Commercial

St.

Suite #

101

San Jose,

CA

95112

408.436.7270 voice

408.436.7276 fax

Web Site: http://www.velodyne.com

E-mail: [email protected]

@Printed

on

recycled paper

11-97, #63-618

FSR-18

Ovvner's

Manual

Velodyne

SERVO-CONTROLLED

Audio/Video

Subwoofer

System

A

Caution

To

reduce

the

risk

of

electric

shock,

do

not

remove

cover

(or

back).

No

user-serviceable parts

inside.

Refer servicing

to

qualified service

personnel.

The

lighting

flash

with

arrowhead symbol

is

intended to alert

the

user

to

the

presence

of

uninsulated

"dangerous voltage"

within

the

product's enclosurethat may

be

ofsufficient magnitude

to

constitute a

risk

of

electric shock

to

persons.

The exclamation

point

symbol

is

intended

to

alert

the

user

to

the

presence

of

important operating

and

maintenance (servicing) instructions

in

the

literature accompanying

the

subwoofer.

1.

Read

Instructions -

All

safety

and

operating

instructions

should

be

read

before

the

subwoofer

is

operated.

2.

Retain

Instructions -

The

safety

and

operating

instructions

should

be

retained

for

future

reference.

3.

Heed

Wamings -

All

wamings

on

the

subwoofer

and

in

the

operating

instructions

should

be

adhered

to.

4.

Follow

Instructions -

All

operating

and

use

instructions

should

be

followed.

5.

Water

and

Moisture-

The

subwoofer

should

not

be

used

nearwater-

for

example.

near

a

bathtub,

washbowl,

kitchen

sink,

laundry

tub,

in

a wet

basement,

near

a

swimming

pool

or

the

like.

6.

Carts

and

Stands-

The

subwoofershould

be

usedonlywitha

cart

orstand

recommended

by

the

manufacturer.

7.

Wall

or

Ceiling

Mounting

-

The

subwoofer

should

be

mounted

to

a

wall

or

ceiling

only

as

recommended

by

the

manufacturer.

S.

Ventilation

-

The

subwoofer

should

be

situated

so

that

its

location

or

position

does

not

interfere

with

its

proper

ventilation

.

For

example,

the

subwoofer

should

not

be

situated

on

a

bed

,

sofa

,

rug

,orsimilar surface

that

may

block

the

ventilation

openings;

or

placed

in

a

built-in

installation

such

as

a

bookcase

or

cabinet

that

may

Impede

the

flow

of

air

through

the

ventilation

openings.

9.

Heat

-

The

subwoofer

should

be

situated

away

from

heat

sources

such

as

radiators

,

heat

registers,stoves,

or

other subwoofers

that

produce

heat.

10

.

Power

Sources -

The

subwoofer

should

be

connected

to

a power supply

only

of

the

type

described

in

the

operating

instructions or as marked

on

the

subVo{)()fer

.

11

. Power·Cord

Protection

-Power-supplycords

should

be

routed

so

that

they

are

not

likely

to

be

wa

l

ked

on

or

pinched

by

items

placed

upon

or against

them

,

paying

particular

attention

to

cords

at

plugs

,convenience

receptacles,

and

the

point

at

which

they

ex

it

from

the

subwoofer.

12

. '

Caution

:

To

prevent

el

ectrical

shock,

match

wide

blade

of

plug

towide

slot

,

fully

inserted.

' "

Attention

:Poureviter

les

chocs electriques,i

ntroduire

lame

Ia

plus

large

de

la

fiche

dans

la

bome

correspondante

de

la

prise

et

pousser

j

usqu'

au

fond

.'

13.

Cleaning

-

The

subwoofer

should

be

cleaned

only

as

recommended

by

the

manufacturer.

14.

Nonuse

Periods

-

The

power

cord

of

the

subwoofer

should

be

unplugged

from

the

outlet

when

left

unused

for

a

long

period

of

time.

15.

Object

and

Liquid

Entry

-

Care

should

be

taken

so

that

objects

do

not

fall

and

liquids

are

not

spilled

onto

the

enclosure

.

16.

Damage

Requiring

Service -

The

subwoofer

should

be

serviced

by

qualified

service

personnel

when:

a.

The

power-supply

cord

or

plug

has

been

damaged.

b.

Objects

have

fallen

or

liquid

has

been

spilled

into

the

subwoofer.

c.

The

subwoofer

has

been

exposed

to

rain.

d.

The

subwooferdoes

not

appear

to

operate normally or exhibits a

marked

change

in

performance.

e.

The

subwoofer

has

been

dropped or

damaged.

17

.

Servicing

-

The

user

should

not

attempt

to

service

the

subwoofer

beyond

what

is

described

in

the

operating

instructions

.

All

other

servicing

should

be

referred

to

qualified service personnel.

1

SPECIFICATIONS

Cabinet

(incl.

legs)

Frequency

Response

Harmonic

Distortion

Subsonic

Filter

High

Pass

Crossover

Low

Pass

Crossover

Phase

Amplifier

Woofer

Magnet

Structure

Voice

Coil

Inputs

Outputs

Warranty

Weight

FSR-18

21-1/4"

x

23-1/4

x

18-1/2

"

(W

,H'o)

16Hz

-

120Hz

+/-

3

dB

<1

"10

(typical)

15Hz

or

35Hz

80Hz

or

100Hz

(6

dB/octave)

40Hz

-

120Hz

(12

dB/octave

initial.

48

dB/octave ultimate)

00/1800

Class

D,

1250

watts

RMS,

3000

watts peak

18"

forward

firing

,

high-excursion

2"

max.

2200z.

(13.7Ibs.)

3800z

.

(24Ibs

.)

Tandem

3"

push-pull

Line-level.

Balanced & speaker-level

Line-level

&

speaker-level

Two

years

(parts

& labor)

105

Ibs.

(approx.)

Specifications are subject

to

change without notice.

FOR

YOUR

RECORDS.

__

DATEPURCHASED

______________________________

_

DEALER

____________________________________

___

SER~L#

____________________________________

__

'NOTE: Please complete andreturn your warranty card within ten (10) days.

14

cloth

to

clean

the

cabinet.

During

normal

conditions,

your

new

subwoofer

may

be

left

on

continuously

without

any

problems

.

The

unit

is

equipped

with

a

signal-sensing

turn

on/off

that

will

automatically

turn

on

the

unit

when

a

signal

is

present

at

the

inputs

and

turn

off

the

unit

after

several

minutes

when

there

is

no

longer

any

signal

at

the

inputs.

If

you

plan

to

leave

the

subwoofer

unused

for

an

extended

period

of

time,

we

recommend

that

you

turn

off

the

master

power

switch

on

the

rear

panel.

Troubleshooting

&

Service

If

you

should

experience

a

problem

with

the

operation

of

your

subwoofer,

please

check

all

of

the

following

before

seeking

service

.

Following

is

a

simple

troubleshooting

guide

to

assist

you.

1.

Verify

unit

is

plugged

in

and

power

outlet

used

is

active.

2.

Is

power

switch

on?

3.

Is

auto

tum

on/off

set

properly?

4.

Is

unit

receiving

an

input

signal

from

your

source?

5.

Have

all

controls

on

subwoofer

(volume,

crossover

,

phase

,

etc.)

been

properly

set'

6.

Is

the

mute

on

the

remote

control

engaged?

7.

Are

both

volume

controls

properly

set?

8.

If

unit

has

been

running

at

high

levels

for

an

extended

period

of

time

,

one

of

the

protection

circuits

may

be

engaged.

•

Has

the

built-in

amplifier

overheated?

•

Is

your

power

line

voltage

sagging

under

heavy

use?

If

the

protection

circuitry

is

active

,

the

unit

may

cycle

on

and

off

until

operating

parameters

return

to

normal.

Protection

circuit

operation

is

usually

indicated

by

a

blinking

power

led.

Under

more

serious

conditions,

the

unit

may

shut

off

completely.

Normal

operation

will

return

upon

cooling,

but

you

may

be

required

to

turn

the

power

off

and

then

on

again

to

reset

the

unit.

The

following

conditions

require

service

by

a

qualified

technician:

1.

The

power

cord

has

become

damaged.

2.

The

unit

does

not

appear

to

operate

normally

or

exhibits

a

marked

change

in

performance

.

3.

The

unit

has

been

exposed

to

water.

4.

Some

pan

of

the

cabinet

or

circuitry

is

physically

damaged.

Thank

you

for

purchasing

a

Velodyne!

13

Congratulations!

Congratulations

on

your

purchase

of

a

Velodyne

subwoofer

system.

This

system

represents

the

absolute

state

oftheart

in

accurate

low

frequency

reproduction.

We

believe

this

to

be

the

finest

subwoofer

available

anywhere!

In

this

new

subwoofer,

we

have

combined

our

radical

new

driver

&

amplifier

deSigns

to

obtain

our

traditionally

accurate

sound

while

increasing

efficiency

and

output

to

newstandards.

This

exceptional

subwoofer

will

provide

you

with

years

of

unparalleled

listening

pleasure.

Enjoy!

Caution!

Please

observe

the

following

instructions

to

insure

safe

and

proper

system

operation.

Note:

Do

not

move

unit

while

turned

on

or

plugged

in!!!

Do

not

leave

unit

in

direct

sunlight

or

use

in

high

humidity

environments!!!

Warning!

To

prevent

fire

or

shock

hazard,

do

not

expose

this

equipment

to

rain

or

moisture.

To

avoid

electrical

shock,

do

not

open

speaker

enclosure

or

amp

chassis

cover.

Please

observe

all

warnings

on

the

equipment

itself.

There

are

no

user

serviceable

pans

inside.

Please

refer

all

service

questions

to

your

authorized

Velodyne

dealer.

Prior

to

installation

Please

unpack

the

system

carefullyl

This

unit

is

extremely

heavy

.

Use

caution

when

lifting

of

moving

to

avoid

injury.

Remove

all

staples

used

to

seal

the

carton

as

they

can

scratch

the

cabinet.

Please

save

the

carton

and

all

packaging

materials

for

future

use.

Packing

this

unit

in

any

other

carton

may

result

in

severe

damage

when

shipping.

Please

take

a

moment

to

record

the

serial

number

and

datellocation

of

pu

r

chase

in

the

space

provided

on

the

warranty

card

for

future

reference.

continued

..

2

Product

Features

&

Controls

•

18"

subwoofer

with

tandem

3"

voice

coils & 220

oz.

magnet

• Built-in 1250

watt

(RMS)

high

efficiency

class D amplifier

•

Accelerometer

based

seNO

control

system for

extreme

accuracy

•

Adjustable

(40

to

120Hz)

low-pass crossover

(defeatable)

•

Selectable

(80 or

100Hz)

high-pass crossover outputs

•

Balanced

(XLR)

inputs

• Line-level (RCA) inputs & outputs

• Speaker-levelinputs& outputswith5

way

binding

post

connections

• Signal sensing

auto

turn

on/off

(defeatable)

•

Variable

volume

control

•

Selectable

phase

control

(D·

or 180·)

•

Selectable

subsonic filter

(15Hz

or 35Hz)

•

Frequency

response

of

16Hz

-

120Hz

+/- 3dB

•

Detachable

power

cord

•

Magnetically

shielded for

video

use

• Multiple

staggered

low-pass crossovers;

12dB/octave

initial,

48dB/octave

ultimate

•

Gain

compression circuit prevents

over

excursion &

amp

clipping

• Infrared

remote

control

with

power,

volume

&

mute

functions

• External

remote

connector

for

custom

installation

• Power

on

&

protection

indicator

LED

(green)

Installation

Your

new

Velodyne

servo

subwoofer

provides

for

a

number

of

installation

options

.

Read

all

the

installation

information

below

in

order

to

determine

which

installation

option

is

best

for

your

system.

Remember

to

perform

all

installation

procedures

with

system

power

turned

off!!!

Inputs

Your

new

subwoofer

is

equipped

with

speaker-level,

line

-

level

and

balanced

(XlR)

inputS.

Use

the

LINE

LEVEL

jacks

when

connecting

your

subwoofer

to

a

pre-amp,

signal

processor

,

line-level

crossover

,

or

receiver

with

pre-amp

level

outputS.

The

SPEAKER

LEVEL

jacks

connect

directly

to

the

speaker

outputs

of

any

amplifier,

integrated

amplifier

or

receiver.

Your

amplifier

section

will

notice

no

additional

loading

effectS

when

you

use

these

inputS

due

to

their

very

high

impedance.

3

the

amount

of

linear

motion

we

desired.

This

inadequacy

led

us

to

design

an

improved

motor

structure

by

incorporating

two

coils,

operating

out

of

phase

in

a

push-pull

configuration

within

two

magnetic

gaps

&

suspended

by

dual

spiders

for

even

greater

linearity.

We

designed

this

motor

to

produce

over

one

inch

(1-1/8"

to

be

exact)

of

linear

motion,

with

a

maximum

mechanical

limit

of

2"

peak

to

peak.

Also,

with

this

unique

configuration,

the

distortion

products

are

reduced

by

a

factor

of

two

over

conventional

single

coil

structures

with

dramatically

improved

cone

control.

This

driver

alone

would

result

in

less

distortion

than

any

other

non

servo

design.

We

also

designed

thi

s

motor

to

be

magnetically

shielded

from

the

start,

to

allow

for

convenient

placement

near

the

television

monitors

of

home

theater

systems.

After

optimizing

every

remaining

part

of

the

loudspeaker,

we

then

turned

to

the

electronics

.

As

in

our

other

servo

productS

,

we

then

incorporated

closed-loop

accelerometer

based

servo-control

of

the

loudspeaker.

At

the

heart

of

this

control

system

is

a

low

mass

accelerometer

rigidly

attached

to

the

voice

coil.

The

accelerometer

continuously

monitors

cone

motions,

providing

us

with

a

feedback

signal

for

the

servo

control

circuitry

.

This

high-

gain

system

is

designed

to

improve

linearity

and

reduce

dist0l1ion

approximately

30

times

over

conventional

non-servo

systems.

While

the

input

signal

is

being

sent

to

the

amplifier

which

powers

the

driver,

a

continuous

signal

repre

s

enting

cone

motion

is

being

sent

to

a

comparator

circuit.

This

circuit

constantly

adjustS

for

any

deviation

between

the

input

signal

and

the

subwoofer's

output.

This

self

regulation

results

in

extreme

control

over

cone

movement,

and

very

accurate

low

distortion

sound.

To

provide

the

power

for

driving

this

massive

loudspeaker,

we

incorporated

an

extremely

efficient

class

0

switching

amplifier.

One

that

is

capable

of

running

cool

to

the

touch

and

providing

1250

watts

(RMS)

of

power!

At

typical

listening

levels,

the

FSR-18

produces

le

ss

than

0.3

%

harmonic

di

s

tortion

with

input

signals

extending

to

20Hz

and

below

.

At

higher

levels

the

distortion

barely

exceeds

1%,

far

better

than

any

conventional

design

currently

on

the

market.

This

combination

provides

you

with

the

best

combination

of

clean,

deep,

accurate

bass,

without

making

any

sacrifice

to

distortion.

Care

of

your

subwoofer

Do

not

use

any

harsh

detergentS

or

chemicals

to

clean

the

cabinet.

Abrasives,

detergentS,

or

cleaning

solutions

may

damage

the

finish

on

the

cabinet.

We

recommend

using

a

damp

continued

..

.

12

Distortion

in

loudspeakers

Nonlinear

distortion

is

a

problem

which

plagues

all

speakers.

This

particular

type

of

distortion

is

a

common

problem

in

subwoofers,

which

must

move

large

amounts

of

air

to

produce

adequate

levels

of

deep

bass.

Nonlinear

distortion

is

defined

as

any

form

of

distortion

that

moves

energy

from

one

portion

of

the

audio

frequency

spectrum

to

another.

When

a

single

tone

is

applied

to

a

nonlinear

system,

the

result

is

harmonic

distortion.

In

which

some

of

the

energy

leaves

the

system

at

multiples

of

the

original

frequency.

When

multiple

tones

are

applied

,

intermodulation

tones

are

produced,

usually

as

simple

combinations

of

the

input

frequencies.

Generally,

3%

distortion

is

considered

a

reasonable

amount

for

speakers

.

This

means

that

3%

of

the

total

energy

leaving

the

speaker

is

at

frequencies

other

than

the

intended

input

signal.

Most

subwoofers

on

the

market

today

however,

produce

much

more

than

3%

distortion

at

common

listening

levels.

Many

models

we

have

tested

produce

greater

than

20%

distortion

@

20Hz

when

driven

to

100dB.

This

is

a

typical

output

level

obtained

in

many

systems,

particularly

home

theater

systems.

Even

at

1

watt,

many

conventional

units

produce

several

percent

distortion.

Secondly,

the

odd

order,

higher

harmonics

are

much

more

offensive

to

the

human

ear

than

the

closer

2nd

harmonic.

An

interesting

result

of

this

reduced

distortion

is

that

some

of

the

bass

,

when

played

over

an

extremely

accurate

subwoofer

system,

seems

to

actually

be

missing

.

The

truth

,

however,

is

that

the

"missing"

bass

was

never

there

to

begin

with!

Distortion

products

of

conventional

woofers

actually

add

to

the

bass

spectrum

making

it

appear

louder

than

recorded.

This

is

due

to

the

additional

and

unwanted

harmonics

(distortion)

of

the

fundamental

signal.

While

conventional

subwoofers

offer

little

to

combat

distortion

products,

we

at

Velodyne

have

developed

another

way

...

The

Velodyne

servo-control

solution

The

Velodyne

FSR-18

produces

sound

in

the

same

manner

as

conventional

loudspeakers:

a

cone-shaped

piston

is

forced

to

move

by

means

of

a

linear

motor.

However

,

this

is

about

the

only

conventional

part

of

the

subwoofer.

We

determined

that

conventional

motors

are

unacceptable

when

called

upon

to

produce

11

Important

l

!!

Do

not

use

both

LINE

LEVEL

and

SPEAKER

LEVEL

connections

si

multaneously'

Volume

control

This

control

allows

you

to

balance

the

output

from

the

subwoofer

to

the

main

speakers

/

amplifier

in

your

system.

This

control

should

be

set

to

achieve

similar

output

level

from

both

the

main

speakers

and

subwoofer

when

listening

to

music.

The

remote

may

then

be

used

for

minute

/

temporary

adjustments,

such

as

increasing

the

volume

for

home

theater

usage.

A

good

starting

point

for

the

volume

control

is

3

or

4

dots

from

minimum.

Low-pass

crossover-

40

to

120Hz

All

inputs

sum

the

left

and

right

channels

together,

with

the

resulting

signal

passing

through

an

adjustable

low-pass

crossover

before

being

amplified.

The

crossover

control

allows

you

to

adjust

the

upper

limit

of

the

subwoofer's

frequency

response

from

40

to

120Hz.

The

subwoofer's

response

will

begin

rolling

off

above

the

frequency

you

set

this

control

to

.

You

should

set

the

crossover

frequency

to

obtain

a

smooth

and

seamless

transition

from

the

subwoofer

to

the

main

speakers

in

your

system.

If

your

main

speakers

are

smaller

units

with

limited

low

frequency

output

,

you

may

wish

to

choose

a

higher

frequency

(such

as

100-120Hz)

than

you

would

with

larger

speakers

which

have

greater

low

frequency

output.

With

larger

speakers,

you

might

start

with

this

control

set

lower,

such

as

80Hz.

A

bypass

switch

is

also

provided

if

you

wish

to

use

an

external

crossover.

If

you

are

not

using

an

external

crossover,

we

recommend

that

you

use

the

one

provided

within

the

unit

for

optimum

performance

l

Phase

adjustment-

O·

/

180·

This

control

allows

you

the

"reverse"

the

phase

of

the

subwoofer's

output

signal

180

•

to

correct

for

any

possible

mismatch

&

resulting

cancellation

between

the

subwoofer

and

your

main

speakers/amplifier.

To

adjust,

simply

listen

to

the

system

with

music

playing.

Then

move

the

switch

from

one

position

to

the

other

and

listen

for

a

change

in

low

frequency

output

The

correct

position

will

have

a

greater

amount

of

apparent

low

frequency

output

continued

..

4

Subsonic-

15Hz

/

35Hz

This

adjustment

alters

the

low

frequency

limit

of

the

subwoofer.

For

most

systems

we

recommend

the

15Hz

setting

which

will

allow

the

subwoofer

to

deliver

the

maximum

low

bass

output

it

was

designed

for.

In

certain

movie

theater

installations

which

suggest

that

the

extreme

low

bass

be

limited

,

move

the

switch

position

to

35Hz

and

the

response

will

be

attenuated

below

this

frequency.

Crossover

switch

-

In

/

Out

This

switch

allows

the

electronic

crossover

circuitry

to

be

removed

from

the

signal

path.

This

is

required

in

certain

installations

which

route

the

signal

through

external

processors

with

a

crossover

circuit

of

their

own,

such

as

the

new

digital

units

.

Simply

move

the

switch

to

OUT

to

disengage

the

built

in

crossover.

For

all

other

installations

which

do

not

have

a

separate

electronic

crossover

we

recommend

you

leave

the

internal

crossover

IN

to

provide

optimum

performance.

Auto

turn

on

switch-

Auto

/

On

The

auto

tum

on

switch

allows

the

user

to

utilize

or

bypass

the

automatic

signal

sensing

circuitry

.

When

set

in

the

AUTO

mode

with

main

power

ON,

the

subwoofer

will

tum

itself

on

when

an

input

signal

is

present.

If

no

signal

is

present,

after

several

minutes

the

unit

will

shut

itself

off.

When

set

in

the

ON

mode,

the

auto

tum

on/off

function

is

bypassed

and

the

unit

will

be

on

whenever

the

main

power

switch

is

on.

If

you

prefer

to

use

the

remote

to

control

unit

power

,

we

recommend

you

leave

the

switch

in

the

ON

position

to

defeat

the

automatic

sensing

function

.

External

remote

jack

This

connection

allows

an

auxiliary

infrared

remote

receiver

"eye"

to

be

installed

and

placed

where

most

convenient.

This

option

is

usually

only

required

when

the

subwoofer

is

to

be

part

of

a

custom

installation

in

which

the

built

in

"eye"

Oocated

adjacent

to

the

speaker

on

the

front

baffle)

will

be

hidden

in

a

location

where

it

can

not

adequately

receive

signals

from

the

remote.

High

pass

crossover

switch-

80

/

100Hz

This

switch

selects

the

frequency

for

the

high

pass

crossover

outputs.

This

crossover

is

functional

on

both

line

and

speaker-level

outputs.

Smaller

speakers

with

limited

low

frequency

ability

may

prefer

the

higher

100Hz

setting

which

will

reduce

the

low

frequencies

5

Regardless

of

where

you

install

your

Velodyne

subwoofer,

it

must

remain

in

an

upright

position

(

woofer

facing

forward

).

Using

,

shipping,

or

otherwise

storing

the

subwoofer

in

any

other

pOSition

for

an

extended

period

of

time

may

result

in

damage

to

the

unit

not

covered

by

warranty

.

The

FSR-18

subwoofer

is

magnetically

shielded

to

reduce

the

amount

of

stray

magnetic

energy

emitted

from

the

speaker's

motor

structure.

This

greatly

increases

flexibility

when

placing

the

unit

close

to

video

monitors

as

there

is

very

little

stray

magnetism.

However,

this

shielding

may

not

be

adequate

in

certain

extremel

y

sensitive

installation

s.

Certain

types

of

televiSions

are

particularly

sensitive

to

stray

magnetic

fields.

If

your

television

produces

distorted

colors

after

installing

your

subwoofer,

simply

increase

the

distance

between

your

television

and

the

subwoofer,

until

normal

color

and

operation

is

returned.

Protection circuitry

Your

new

subwoofer

is

equipped

with

special

prote

c

tion

circuitry

to

provide

maximum

performance

with

greatest·

reliability.

The

unit

is

protected

against:

1)

Overdriving

the

speaker

or

amplifier.

2)

Overheating

the

amplifier.

3)

Excessive

drop

in

power

line

voltage

.

The

first

type

of

protection

circuitry

which

prevents

overdriving

of

the

speaker

or

am

plifier

operates

constantly

without

being

audible

under

most

situations

.

In

some

extreme

situations

(

sustained

high

output

levels

such

as

pro

sound

usage)

,

the

unit

may

shut

down

momentarily.

The

green

power

led

may

also

blink

rapidly.

This

indicates

operation

of

the

thermal

or

undervoltage

protection

circuitry.

If

this

should

happen

,

you

should

reduce

the

volume

setting

or

shut

the

unit

off

until

normal

operating

conditions

return.

You

may

also

want

to

plug

the

unit

into

a

different

wall

outlet,

as

dropping

power

line

voltage

will

be

most

noticeable

under

strenuous

conditions

.

contmued

..

10

In

terconnect

cables

When

installing

your

new

Velodyne

subwoofer

using

the

line

level

connections,

you

should

always

use

shielded

phono

cables.

There

are

many

decent

cables

available

today,

most

any

of

which

will

work

perfectly

well.

We

do

recommend

that

you

keep

the

length

of

cable

as

short

as

possible

to

avoid

any

potential

noise

problems.

When

using

speaker

level

connections,

use

a

decent

quality

speaker

cable

that

mates

well

with

the

connectors.

Be

very

careful

to

avoid

any

loose

strands

or

frayed

wires

which

may

result

in

a

short,

which

may

damage

your

equipment.

Cables

of

extremely

large

size

are

typically

not

required.

Extremely

large

gauge

wire

may

not

properly

fit

in

the

binding

pos

ts,

resulting

in

a

poor

connection

and

possible

short

circuits.

Placement

True

subwoofers

operate

at

extremely

low

frequencies

which

are

primarily

non-directional.

While

it

is

recommended

that

the

subwoofer

be

placed

on

the

same

plane

as

the

satellite

speakers,

room

and

system

conditions

often

dictate

otherwise.

Keepin

mind

that

frequency

response

and

output

level

can

be

drastically

influenced

by

placement,

depending

on

the

acoustic

properties

of

the

listening

room.

Typically,

the

optimum

location

for

a

subwoofer

is

tucked

away

in

a

corner

of

your

listening

room.

This

location

will

usually

offer

the

greatest

output

levels

and

optimum

low

frequency

extension.

The

worst

location

for

a

subwoofer

it

typically

far

away

from

any

walls,

and

close

to

the

center

of

your

room.

Avoid

these

locations

when

possible.

When

using

a

pair

of

Velodyne

subwoofers

in

stereo,

it

is

preferable

to

place

each

subwoofer

by

the

satellite

of

the

same

channel.

Caution!

This

subwoofer

has

electronics

built

into

the

cabinet.

Do

not

place

the

cabinet

sources

of

heat

such

as

furnace

registers,

radiators,

etc.

Do

not

place

the

unit

near

sources

of

excessive

moisture,

such

as

evaporative

coolers,

humidifiers,

etc.

The

power

cord

should

be

routed

in

such

a

way

that

it

will

not

be

walked

on,

pinched,

or

compressed

in

any

way

that

could

result

in

damaging

the

insulation

or

wire.

9

sent

to

them.

Larger

speakers

with

greater

low

frequency

output

may

be

able

to

handle

the

80Hz

setting

without

strain.

Power

switch

The

master

power

switch

is

located

on

the

right

half

of

the

unit.

This

rocker

style

switch

is

the

main

on/off

for

the

unit.

This

switch

should

be

set

to

position

1

(up)

for

on,

and

0

(down)

for

off.

If

the

unit

is

to

be

left

unused

for

an

extended

period

of

time,

the

master

power

switch

should

be

turned

off.

Detachable

power

cord

Allows

for

easy

replacement

should

the

original

be

damaged.

Infrared

remote

control

The

remote

control

unit

supplied

with

your

subwoofer

allows

for

convenient

adjustment

of

select

subwoofer

functions.

The

power

button

turns

the

unit

on/off.

The

volume

+/-

buttons

on

the

remote

allow

you

to

increase

or

decrease

the

output

volume

of

the

unit

relative

to

the

setting

of

the

main

volume

control

on

the

rear

panel.

The

middle

reset

button

returns

the

remote

volume

control

to

neutral,

output

level

will

then

be

determined

by

the

manual

volume

control

setting.

Initial

setup

of

the

unit

should

be

performed

with

the

remote

volume

at

neutral,

while

you

adjust

the

manual

volume

knob

to

match

playback

levels.

The

mute

button

silences

the

unit.

If

you

choose

to

utilize

the

remote

to

tum

the

unit

on/off,

we

suggest

setting

the

auto

turn

on

switch

to

the

on

position.

This

deactivates

the

sensing

circuitry

allowing

the

remote

to

have

total

control

of

unit

power.

NOTE:

Two

AM

batteries

are

required

&

included

for

operation.

If

the

remote

control

operating

range

deteriorates,

please

check

batteries

for

deterioration.

Do

not

leave

remote

placed

on

heat

generating

items,

such

as

amplifiers.

Line-level

connection

Figure

1

shows

connection

to

a

pre-amplifier's

main

outputs

and

returning

them

to

your

amplifier

inputs.

continued.

.

6

Figure

1:

Installation using line-level inputs

--

....

"1fIfl.

.....

.....,

.

..

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~f!g9Y-nf

~

.

~.

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..

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01_""'"

I='SR-.,8

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........

..

_.....,..--_

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.

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..

...,.-,._

...........

..-0

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.

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,.,

....

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,,"""

..

,r.&A.<.

,,

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_,-"

~

--

...

~

..

.

~

• [ 1 . ,

-"

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.-

••

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••

-.

--.-,,,,,

..

((

F·

.e

_

,,:,:~~

~~E.

;:=-

=-1!.~

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--

r

--

-~-

PRE-AMP

AMPLIFIER

MAIN

OUTPUTS

MAIN

INPUTS

MAIN

OUTPUTS

LEFT RIGHT LEFT

RIGHT

LEFT

(ij)

@----

(;~

:~

a

TO

SATELLITE

SPEAKERS

_

\'V'hen

installed

in

this

fa

s

hion

,

your

satellite

speakers

will

be

crossed

over

at

80

/

100Hz

whi

ch

remove

s

the

lower

bass

from

your

amplifier

and

speakers,

enabling

them

to

do

a

better

job

reproducing

high

frequencies.

By

utilizing

this

method,

you

will

have

a

bi-

amplified

system,

gaining

improved

power

and

headroom

for

your

system.

Subwoofer

outputs

The

Velodyne

subwoofer

is

designed

to

operate

using

the

full

range

audio

signal

for

input

when

using

the

built-in

cro

s

sover.

Some

processor

s/

receivers

,

have

a

"subwoofer

out"

jack

that

is

internally

filtered

and

designed

to

be

used

with

a

conventional

amplifier

and

speaker.

In

some

rare

c

as

es

,

combining

both

an

external

crossover

and

the

one

internal

to

the

s

ubwoofer

may

result

in

low

output

and

increased

noise.

In

these

installations

you

may

need

to

bypass

the

internal

crossover

in

either

the

processor

or

Velodyne

subwoofer.

In

some

installations

,

simply

setting

one

crossover

to

a

higher

frequency

(such

as

120

Hz)

will

re

s

tore

maximum

performance.

To

bypass

the

subwoofer's

internal

crossover

when

the

unit

is

being

fed

a

low

pass

signal

from

another

crossover,

simply

locate

the

switch

marked

X-over

,

OUT

-

IN

on

the

rear

panel

of

the

subwoofer

and

set

to

the

OUT

pOsition.

This

will

eliminate

the

internal

cros

s

over

from

the

signal

path.

Note

...

If

not

using

an

external

crossover,

you

should

use

the

built-in

crossover

for

optimal

performance.

7

II

Speaker-level connection

Figure

2

shows

an

easy

way

to

connect

your

Velodyne

subwoofer

directly

to

your

receiver

or

integrated

amplifier.

When

connected

in

this

fashion,

your

satellite

speaker

s

will

be

crossed

over

at

80

/

100Hz,

which

removes

the

lower

bass

from

your

speakers,

enabling

them

to

do

a

better

job

reproducing

high

frequencies.

You

may

also

connect

your

satellites

directly

to

your

receiver

or

amplifier

along

with

the

subwoofer

if

you

wi

sh

to

bypass

the

internal

high-pass

crossover.

Caution!'!

To

avoid

damage

to

your

main

amplifier

,

be

sure

to

maintain

correct

polarity

when

making

all

connections.

Red

(positive)

to

red

,

and

black

(negative)

to

black

.

Be

sure

that

all

connections

are

tight

,

and

that

there

are

no

loose

strands

or

frayed

wires.

Figure 2: Installation using

speaker-level

(from

amplifier)

inputs

MAIN

OUTPUTS

,

(speaker-level)

INTEGRATED

AMP I

RECEIVER

8

((

SATELLITE

SPEAK

ERS

continued

..

Velodyne FSR-18 Manuel utilisateur

Manuels Subwoofer populaires d'autres marques