QM
12MP
User Manual
User Manual
Q Motion Series
QM 12MP
5
The Secret To Long Life
A competent audio system operator will
operate the loudspeaker within its limits and
capabilities.
Operation beyond the loudspeaker’s
capabilities usually includes, but is not limited
to, one or more of the following conditions:
Amplifier clipping
1 .
Peak voltage input in excess of twice
2 .
the specified voltage limit
Noticeable distortion
3 .
Mechanical noise (such as a cone
4 .
bottoming out)
A suitable means for determining
5 .
these conditions is highly
recommended .
At a minimum, the
operator should have a meter display
calibrated to indicate when the
loudspeaker’s maximum RMS voltage
limits will be exceeded. This assumes
amplifiers are not being driven into
clipping at these limits.
The QM 12MP is an 8 ohm enclosure and can
be connected as multiple parallel connections
to an amplifier channel that can operate
into speaker impedances of 4 ohms, (see
connections diagram).
A recommended power range per amplifier
channel is 1,000 watts RMS into a 4
Ω
load.
Higher power per channel is possible if the
power is undistorted. An ideal partner for
the QM 12MP is the Quest QA3004 amplifier.
Setting the QA amplifier’s high pass filter at
80Hz is recommended for clean high SPL
vocal applications.
Magnetic Fields And A/V Equipment
Loudspeakers generate magnetic fields,
unless specifically designed for audio-visual
applications where drivers are magnetically
shielded to limit the extent of the magnetic
field. Therefore, place a loudspeaker at
least 2ft (0.6 m) or more from any TV set or
computer monitor. If it causes distortion
or a change in the display color, move it
further away. Do not place any audio, video,
or computer magnetic media near the
loudspeaker as the loudspeaker’s magnetic
field may damage the data.
Loudspeaker Wire Gauge
The proper conductor size (wire gauge) to use
for the loudspeaker cable is primarily a function
of the wire length. The general rule is that lower
resistance, in relation to the loudspeaker’s
impedance, is better. To achieve this, use larger
conductor sizes for longer lengths of cable and
for lower impedance loudspeaker loads.
For wiring cables to fold-back monitors, 1.5mm
16 Gauge would be the minimum for short cable
runs.
Standard AWG
14ga ... 0.6410” dia ->1.63mm dia 10.44ohm/km
16ga ... 0.0508” dia -> 1.29mm dia 13.17ohm/km
18ga ... 0.0403” dia -> 1.02mm dia 20.94ohm/km
Euro Standard Wire -
1x1.00mm2 -> 18 ga AWG
1x1.50mm2 -> 16 ga AWG
1x2.50mm2 -> 14 ga AWG
1x4.00mm2 -> 12 ga AWG
