The first most important criterion for sonic
realism is ACCURATE TONAL BALANCE.
Loudspeakers radiate sound in all
directions. The sound arrives at the ear
both directly and indirectly. Most quality
loudspeakers are designed so that the sound
radiated directly forward accurately
represents the electrical signal being fed
to them by the amplifier. This
is known as FLAT ON-AXIS FREQUENCY RESPONDE.
It is important that this signal be flat
because it reaches the listener first,
directly and with the most intensity.
Sound radiating at other angles from the
loudspeaker (indirect sound) also reaches
as it is reflected from the room boundaries
(floors, walls, ceilings) as well as other
objects in the room. The sum total of this
information becomes the reverberant sound
field. It is critical that this sound field
also be flat. A loudspeaker with the ability
to produce a flat reverberant sound field is
said to have a FLAT MID-BAND POWER RESPONSE.
Measurement of a loudspeaker's POWER
RESPONSE is time-consuming, as hundreds of
measurements must be made and averaged.
Most loudspeaker companies ignore this
absolutely critical aspect of loudspeaker
design. It is
the combination of the on-axis frequency
response and power response that gives a
loudspeaker its TONAL BALANCE.
The Angstrom OMEGA Series shows its pedigree
by the careful optimization of the on-axis
response the power response. Both are smooth
and flat through the critical regions and
the resulting loudspeakers are more tonally
accurate, able to reproduce all types of
programme material with detailed, convincing