PMC Twenty-21 Manuel utilisateur

series user guide

No.

Hand built by

Date

Warranty Certicate

Please take a few moments to complete the warranty card at the

back of this booklet or register at www.pmc-speakers.com (click on ‘register

a product’). This records the purchase of your loudspeakers and provides you,

the customer an opportunity to make suggestions and provide feedback

directly to PMC.

Product Support

For product support, accessories or servicing advice, please contact

a PMC authorised dealer - See www.pmc-speakers.com.

IMPORTANT - Complete your warranty certicate

THE PROFESSIONAL MONITOR COMPANY LIMITED

43-45 CRAWLEY GREEN ROAD LUTON LU2 OAA UK

T 0870 4441044 F 0870 4441045

E [email protected] www.pmc-speakers.com

Version v4 - #100

A message from Peter Thomas –

Peter Thomas

Owner & Chief Designer

“Our sole aim while designing loudspeakers is to recreate the true essence of an artist’s

intention, combining the ultimate level of sonic resolution with solid engineering principles.

We believe that the same loudspeaker can be used throughout the entire audio chain,

from composer to studio or lm stage, post-production or mastering and then, nally,

the consumer. Our unswerving passion for getting it right has made this goal possible.

Thank you for choosing PMC products. It is now time for you to read the user guide,

install your new twenty series speakers, and realise just how much you’ve been missing.

Over two decades PMC has earned an

unrivalled reputation for creating the

world’s nest professional loudspeakers.

Simply put, our loudspeakers provide a

reference for the world’s highest prole

productions and events. They are found

at every stage of the creative process,

from conception to recording and

broadcast and, of course, in the home.

Our client list reads like a who’s who of the

sonically aware, with Prince,

Stevie Wonder, Robbie Williams, Coldplay,

Brian May, Universal, Sony, Dreamworks,

Deutsche Grammophon and the BBC

among the makers of movies and music.

Our loudspeakers were used in the

production of Titanic, Man of Steel, Skyfall,

WALL-E and during broadcasts of both the

Beijing and the London Olympics.

elbow

Stevie Wonder

elton john

BBC

Tony Bennett

Prince

Coldplay

UNIVERSAL MUSIC GROUP

Basement Jaxx

Robbie Williams

Royal College of Music

Brian May

Warner Music

Kraftwerk

Underworld

Emil Berliner/Deutsche Grammophon

Google

Siemens

Sony

JVC Studios

PMC: the authority for quality sound.

Congratulations - You have joined the elite

General usage guidelines

PMC’s TM

Advanced Transmission Line

- Basically speaking

Advanced Transmission Line

- Technically speaking

Our meticulous attention to detail

Unpacking

Resonance absorbing plinth installation guide

Compact loudspeaker set up

Connections

Connecting to an amplier twenty.21, 23, 24 & C

Connecting to an amplier twenty.26

Running in or breaking in

Positioning

Fine tuning for perfect bass

Stereo set up

Surround sound specic set up

Ideal 5.1 surround sound set up

Ideal 7.1 surround sound set up

Service

Specications

Warranty on-line

Warranty certicate - Part 1 - Your copy

Warranty certicate - Part 2 - Our copy

Help us improve - Your Comments

Inspection certicate

user guide

Contents

Tip

Read these instructions and keep them in a safe place for future reference.

Tip

Heed all electrical safety warnings, including any on the loudspeakers themselves.

Tip

Do not use the loudspeakers near water.

Tip

We have provided a high quality Microber cloth for cleaning. This is ideal as the cabinet

should only be cleaned with a dry, lint-free, cloth. Do not use solvents, abrasives, waxes

or liquids as they may be detrimental to the nish.

Tip

Floor spikes are sharp and should be treated with great care during installation and use.

Tip

Do not install near any heat sources such as radiators, ovens or other equipment that

produce excessive heat.

Tip

Unplug this product from both source and power during electrical storms or when unused

for extended periods of time.

Tip

Packing material can pose danger to the young and vulnerable.

Ensure these items are kept or disposed of safely.

Tip

High volume audio signals, however short their duration, have the potential to cause

hearing damage. Use care when setting the system volume level to ensure playback

sound pressure levels remain within safe comfortable limits.

Tip

Do not attempt to service the equipment. There are no user serviceable parts inside.

Please refer all servicing to PMC authorised personnel.

Tip

Servicing is required when the apparatus is damaged, exposed to moisture,

or exhibits a distinct or sudden change of operation or audio performance.

Tip

PMC has made efforts to provide accurate installation information and good quality

xings. PMC LTD will not be held responsible or liable for injuries or property damage -

direct, indirect or consequential - arising out of use or inability to use this product safely

and properly.

Tip

twenty loudspeakers contain very powerful magnets and therefore may have

a detrimental effect if left in close proximity to magnetically sensitive items such as;

CRT (tube style) televisions or monitors and media such as oppy discs, cassettes

and videotapes.

General usage guidelines

Tip

Techn

Basically speaking

Advanced Transmission Line

Tip

The world’s leading professionals rely on the

accuracy of PMC’s designs everyday to

create much of the music and sound you

hear. You can rest assured that what you hear

from a PMC speaker is identical to the version

approved by the artist themselves.

What they offer above a standard HiFi speaker

Detail - They are extremely detailed and

sound natural - As if the musicians are with you

in the room

Room lling - The sound they produce covers

a massive area, so wherever you sit you still

hear everything

Full, rich sound at any volume - You can listen

at low level and still hear bass - Ideal for low

level or late night listening

Reliability - all the components are tried and

tested in the professional world

Ease of drive - They are efcient and therefore

can be driven by the vast majority of good

quality ampliers

Ideal for surround - They all have an

identical tonal balance and can be mixed

and matched to create the ultimate

surround sound system

Easy to position - They sound superb in a

vast array of rooms, large and small

Feel good - They are made in Britain by

hand, by nice people who care, and love

audio

Boast - You have joined the long list of world

famous music makers and recording studios

using PMC’s TM

Advanced Transmission Line

technology -

See www.pmc-speakers.com and click

on key clients

twenty 24 cross section

showing TM

Advanced Transmission Line

•

twenty 22 cross section

showing TM

Advanced Transmission Line

•

ology

turn signicantly reduces distortion. A spin-off

from the lack of distortion is that the upper

bass and midrange detail is not masked by

harmonic distortion residing in the very low

frequencies. The result is PMC’s characteristic

transparent midrange and fast, attacking

bass notes, all reproduced with outstanding

clarity.

A further advantage of the transmission

line approach is a cabinet that produces a

higher volume and greater bass extension

than a ported or sealed design of a similar

size, even if identical drivers were used.

Moreover, as the loading on the main driver

is maintained at all volumes, the frequency

response also remains consistent regardless

of listening level.

Casual late night listening or analytical studio

sessions can be conducted without the need

for high volumes to achieve maximum bass

response. A characteristic that is especially

suited to both the home enthusiast and

recording professional alike.

‘No other technology provides such a huge, rich room lling sound’

Technically speaking

PMC’s TM

Advanced Transmission Line

(Advanced Transmission Line)

enclosures have taken loudspeaker design

to the highest level.

A PMC transmission line design utilises

sophisticated cabinet construction,

proprietary drive units and patented

absorption materials and techniques.

The benets are enormous compared to the

relatively simple sealed and ported models

currently available elsewhere.

The bass driver is placed at one end of a

long tunnel (the transmission line), which is

heavily damped with absorbent acoustic

material. This material is specied to absorb

the upper bass and higher frequencies that

radiate from the rear of the bass driver.

The lowest frequencies, which remain in

phase, then emerge from the large vent at

the end of the line, which essentially acts as

an additional driver. One advantage to this

approach is that the air pressure loading the

main driver is maintained, thus controlling the

driver over a wide frequency range, which in

Tip

All PMC loudspeakers are hand-built in the U.K. using individual

components that are matched to our reference model; this includes

the structural integrity of every cabinet and the testing and recording

of each component. This guarantees it will be within our strict tolerances

and ensures your purchase sounds identical to the original design.

Each completed loudspeaker then undergoes a set of objective and

subjective measurements - frequency response sweeps ensure that

the design meets our exacting performance criteria, and then listening

tests are conducted against the reference model using a wide variety

of material, from a benchmark BBC speech test to classical music,

pop and rock.

Tip

Our meticulous attention to detail

Ce manuel convient aux modèles suivants

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