POWER REQUIREMENTS
Amplifiers with power outputs between those noted in the loudspeaker specifications will generally be
adequate, although more powerful amplifiers could be used if care is taken to avoid over-driving the
loudspeakers.
Always use the volume control with discretion, and reduce the level immediately should the
loudspeakers begin to distort, or your ears hurt.
Power requirements depend ultimately on listening distance, room acoustics, room size, number of
speakers and speaker placement relative to room boundaries. Smaller, less sensitive loudspeakers
require more power than larger, more sensitive models. For instance, for listening at 2m (6 1/2’)
distance from the speakers in a 35 cubic metre (1,225 cubic feet) domestic room, a pair of Elan 10s might
need about 25W per channel to achieve 100dB SPL, (sound pressure level) whereas the Elan 35s would
only need only 10W for the same SPL. The maximum SPL level achievable by the audio system will
therefore be set by the maximum available amplifier power and the loudspeaker sensitivity. That is why
larger, more sensitive loudspeakers are better suited to larger rooms.
So, as a rough guide, the minimum amplifier power we recommend varies from 25W into 4 ohms for the
Elan 10, to 10W into 4 ohms for the Elan 35 (please see the individual specifications).
Although 100dB SPL maximums are very loud, these would occur only during the very loudest moments.
The average SPL could be around 9-14db lower, depending on the style of music. Using amplifiers of
lower power than recommended is best avoided because they will restrict the dynamic range. Such
amplifiers may also cause damage to the loudspeakers if they are driven beyond their capability in an
attempt to obtain high volume levels.
This is because the clipping distortion produced when an amplifier is driven beyond its normal output
capability can be very destructive. A powerful amplifier operating well inside its capability will generally
be less likely to damage your loudspeakers than a lower powered amplifier operating beyond its
capacity. (Please note also, that some amplifiers will deliver more than their continuously rated RMS
power for short periods, enabling higher maximum SPLs to be achieved in practice).
For example, in a 35 cubic metre room, at 2m listening distance, with the amplifier reaching maximums
of 100W per channel and playing highly compressed pop music, a pair of Elan 10 speakers could deliver
maximum SPLs of 106dB and average levels of 97dB. With classical music, the average level could be
much lower, around 92dB. For a pair of Elan 35s with the amplifier reaching 200W per channel, you could
add up to 7dB to those figures (at 113dB SPL maximum, with averages of 104dB pop and 99dB classical).
Please refer to the SPL vs. Amplifier power chart on page six. The diagonal graph lines show
approximate SPLs for each Elan model over a range of power levels in a typical 35 cubic metre room at 2
metres listening distance and with loudspeakers approx 1m to 1.5m from boundaries. Note; this chart
covers just one example of listening distance, room size, speaker position and sound damping (for RMS
amplifier power into 4 ohms per channel).
There will be a wide variation in SPLs in other situations.
Smaller sparsely furnished rooms, closer listening, and loudspeaker to room boundary distances
produce higher SPLs, (or require less power to produce the same SPL). In such cases the actual SPLs
could rise above the diagonal graph lines. Conversely, larger more heavily furnished rooms, and greater
distances between speakers and room boundaries, would reduce SPLs (or require more power to
compensate). In such cases, the actual SPLs would fall below the diagonal graph lines.
Page FiveE&OE