4.2 IMPEDANCE
Your A1000.4 will easily drive 4 Ohm loads in Stereo mode.
However, the impedance of any loudspeaker changes with
frequency, and its rated impedance is not always its minimum
impedance.
If you connect more than one loudspeaker to the A1000.4, please check that
the actual load impedance does not drop below the A1000.4's rated output load
that is
hm. Your A1000.4 will not be damaged by excessively low output load
4 O
impedances, but will not be able to provide full output power and its protection
circuit will automatically cut off the output signal until the low load condition
is removed.
7
4.3 HOW TO CHOOSE THE CORRECT SPEAKER
Today it has become very popular to monitor and mix music
through near-field monitors "reference" speakers. With near
field monitoring, small speakers are positioned a few feet
from the engineer's ears.
As a consequence, the acoustic is not so critical. Near-field monitors offer
more advantages when compared to large studio monitor, such as smaller size
and lower cost.
Because of its optimal power rating, HI-FI performance, and a no-fan design,
your A1000.4 is ideal in driving reference near-field monitor speakers in smaller
studios.
Your A1000.4 is also at home driving high frequency compression drivers or
full range PA cabinets or Stage Monitors when enormous SPL is not required.
4.4 POWER CONSIDERATION
Digital amplifiers and switch mode power supply (which are
parts of your A1000.4) are designed to reproduce musical
signals with high dynamics, high SPL and low distortion. For
this reason, all major Manufacturers of these kinds of amplifiers do not specify
their amps in terms of RMS but most measurements are made with EIA (or
EIAJ) specifications. An EIAJ signal (you can download the signal string from
the site of Electronic Industry Association) simulates a musical signal and it is
applied to the input of
LTO amplifier continuously, that is for a long period of
time. Under EIA specification, your A1000.4 will deliver 250 watt
channel
continuously with 240 Volt as AC power and with one channel at a time driven.
But switch mode power supply like the one used in your A1000.4 are capable
of enormous dynamics and therefore we also measure your A1000.4 as "dynamic
power". This is the amplifier capability to deliver a very high "dynamic power" for
short periods of time securing unprecedent SPL with transient sounds. In this
case the total dynamic power of your A1000.4 is 450 watt
channel on 4 Ohm.
