PMC DB1 Quick Start Manual

Introduction
Thank you for purchasing the DB1 loudspeaker, one
of The Professional Monitor Company's range of
carefully engineered and innovative loudspeakers.
In order that you can take full advantage of their
performance, please take a little time to read
through the following information.
Help
If 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 Requirements
It 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
D B 1 / D B 1 S
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.
Input to tweeter
(HF Section)
Input to bass driver
(LF Section)
Figure 1: DB1 Rear Connection Panel
It 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
In 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.