Instructions For Use. Page 5
E30
distance, the sound output will be 87dB.
This is actually a reasonably loud sound,
and much daily listening will not use
much more power than this. Note that
changing to a pair of speakers with a
rating of 90dB is equivalent to doubling
the power of your amplifier. To give
some comparisons, a full concert orches-
tra will touch 105 to 110dB for short
periods during a crescendo. Concorde at
take off measures over 130dB, which is
the threshold of pain, and positively
dangerous. The E30, which is rated at
100 watts, should be capable of levels
around 107 dB into the average pair of
loudspeakers. Remember that this is
measured at one metre from the speaker.
This sound level should be more than
adequate in most living rooms, and in
fact should never be used for prolonged
periods. However, loudspeakers are not
particularly linear devices, and some
amount of compression may keep the
levels below the theoretical maximum.
It has been determined that prolonged
exposure to high sound levels can be
dangerous to your hearing, so please take
care.
CONNECTIONS
All connections should be made
with the power OFF.
The E30 has inputs for RCA type
phono plugs. Each input is clearly la-
belled on the back panel.
The mains connector is a standard
IEC type. Do not try to use any other
type of mains lead.
The E30 is extremely easy to use.
Once the loudspeakers and a suitable
preamplifier have been connected,
switch on. The power indicator will
come on.
LOUDSPEAKERS
To connect loudspeakers, you can
use spade terminals or bare wire connec-
tions. Either of these methods should
give good results. The bare wire
connection gives the most direct join,
and should therefore give the best sound
quality, as long as the terminal is
screwed down tightly. However, any
benefits are likely to be minimal, and the
use of spade terminals allows for easy
changing of the connections. More
important is to ensure that there are no
wire "hairs" hanging loose. These could
cause a short circuit, never a good thing
for an amplifier. It is advisable to solder
the ends of the cable, to prevent wires
working loose. Make sure that the
speakers are connected in relative phase.
This means that you should connect the
red wire to the red (+) terminal, and the
black wire to the black (-) terminal. If
your speaker cables are not red and
black, simply ensure that both speakers
are connected in the same way. Failure
to do this will result in a sound which
lacks bass and stereo image (sometimes
referred to as "phasey"). Some commen-
tators have asserted that the question of
absolute phase is also important. Should
you wish to check this out, try changing
both speaker connections at the amplifier
end.
IMPORTANT: switch the ampli-
fier off before doing this.
Your audio dealer can make up a
pair of cables specially for your E30/
loudspeaker combination. Check the
connections, and look out for any little
‘hair’ of wire which might short out the
connections at either end of the cables.
To get the best from your E30 for a
realistic soundstage and full dynamic
range, use it with loudspeakers of a
reasonable efficiency. An average rating
for a loudspeaker these days is about
87dB. This should mean that for an
input of 1 watt, measured at 1 metre
CONNECTIONS
