PMC DB1 User manual

D B 1 / D B 1 S
Introduction
Thank you for purchasing the DB1 loudspeaker, one
of The Professional Monitor Company’s range of
carefully engineered and innovative loudspeakers.
n order that you can take full advantage of their
performance, please take a little time to read
through the following information.
Help
f you should require help or assistance please call
your dealer first, if they are unable to assist call your
local agent/distributor or the Professional Monitor
Co. but please have ready the serial number and
details of where and when you purchased your
DB1’s.
Warranty
As soon as possible after installing your loudspeakers,
please complete and return your guarantee card.
Unpacking
The DB1’s are packed inside a heavy duty outer
protective cardboard casing. The speakers are
suspended by dedicated foam supports. Please
take care when removing and handling the units.
The packing materials should be retained for use
should it become necessary to return a unit for
servicing.
Amplifier Power Re uirements
t is recommended that amplifiers of between 50
and 100watts output are used, although more
powerful amplifiers can be successfully used if care
is taken not to overdrive the loudspeaker.
Driving an amplifier too hard into “clipping” can
result in damage to the loudspeaker. Very often
amplifiers are equipped with complicated
protection circuitry which is more often than not
designed to protect the amplifier at the expense of
the loudspeakers. A powerful amplifier operating
well inside its capability will generally be less likely to
damage your speakers than a less powerful one
operating close to its limits.
Connection
Ensure your amplifier is switched off before you
make any connections to your loudspeakers. Which
ever connection method you choose always use
good quality cables to connect your amplifier to
your loudspeakers. We would recommend the use
of multi-stranded copper cable of reasonable cross
sectional area.
The DB1 is equipped with four binding posts
(2red/+ve, 2 black/-ve) which can except either
standard 4mm banana plugs or bare wire. Where
gold plated binding posts are used we would
strongly recommend the use of gold plated banana
plugs.
Figure 1: DB1 Rear Connection Panel
t is possible to configure the DB1 for either
standard, Biwire or Biamp working. The units are
shipped for Standard wire operation as described in
1. below.
1. Standard Operation
Simply connect your cable between the red (+ve)
and Black (-ve) terminals. Either the upper or lower
set of binding posts may be used. Do not remove
the linking bars and ensure that the binding posts
are done up tightly.
2. Biwire Operation
Loosen the binding posts and remove the linking
bars. The HF and LF sections of the loudspeaker are
now separated, individual cables can now be fed
from your amplifier to the input of each section. The
upper terminals are the input to the HF driver and
the lower pair the LF driver.
3. Biamp Operation
n this mode the LF and HF drivers are fed from two
separate amplifiers, both of which are fed the same
input signal. Loosen the binding posts and remove
the linking bars. The HF and LF sections of the
loudspeaker are now separated, individual cables
can now be fed from your amplifier outputs to the
input of each section. The upper terminals are the
input to the HF driver and the lower pair the LF
driver.
nput to tweeter
(HF Section)
nput to bass driver
(LF Section)

DB1 User.doc
Stands
Studio Use: The DB1S loudspeaker can be mounted
on the meter bridge of mixing consoles with the
approriatte shelf or on PMC’s dedicated stands
behind the console - for further details consult your
dealer.
Home Use: At home we would recommend a stand
of between 20 and 24 inches. A number of excellent
stands are available at these heights so please
consult your dealer on which will best suit your
requirements and budget.
Loudspeaker Placement
All loudspeakers are influenced by the acoustic of
the room in which they are placed. The positive and
negative effects of your room can be manipulated
to some extent by careful positioning.
Proximity to room boundaries (floors and walls) raises
the low frequency energy at the expense of
unevenness in the response. n the extreme, placing
a loudspeaker low, near the floor and in a corner
will produce an extremely bass heavy and boomy
response, often making the bass slow and ill defined.
Experimentation with placement cannot be
overstated.
Running In
All new loudspeakers require a period of running in.
This allows for the settling of materials used in the
drive units. The DB1 is no exception to this rule, best
results will be achieved from newly supplied
monitors after a period of between 10 and 20 hours
running in.
Care of your Monitors
There are no user serviceable parts within the DB1
monitors. The cabinets should be cleaned with a
damp cloth. Take care when using wax or spray
polishes.
Service
n the unlikely event of a technical problem arising
please contact the dealer from whom the monitors
were purchased and describe the symptoms of the
fault to them. They may be able to suggest a
solution to your problem immediately.
f you wish to return your monitors to us please use
the original packing. No responsibility will be held for
damage to the monitors if they are packed
incorrectly. f you no longer have your packing a
replacement set may be obtained either directly
from ourselves or via your dealer.
Please enclose a note detailing the symptoms of the
problem and your name address and telephone
number when making any returns to us. Remember
if you have a problem always consult your dealer
first.
WARRANTY
THE PROFESS ONAL MON TOR COMPANY'S DB1 & DB1S MON TOR LOUDSPEAKERS ARE
GUARANTEED AGA NST ANY DEFECT N MATER AL OR WORKMANSH P FOR A PER OD OF
F VE YEARS FROM DATE OF PURCHASE. W TH N TH S PER OD, THE SUPPLY OF
REPLACEMENT PARTS W LL BE FREE OF CHARGE PROV DED THAT THE FA LURE WAS NOT
DUE TO M SUSE, ACC DENT OR NEGL GENCE.
TH S WARRANTY S APPL CABLE N THE UN TED K NGDOM ONLY. ENQU R ES N COUNTR ES
OTHER THAN THE UK SHOULD BE ADDRESSED TO THE LOCAL PMC AGENT OR D STR BUTOR
43/45 Crawley Green Road
Luton
Bedfordshire
LU2 0AA
Tel: [phone]
Fax: [phone]