Queat Engineering QM 350i User manual

User
Manual
MODEL: QM 350i

Contents
Safety Precautions 1
General Description 3
Getting The Best From Your QM350i 4
Flying the QM350i 6
QM350i Specifications 8
QM350i Reference Diagram                      9
User Manual Q Motion Series
QM350i

Contents
Safety Precautions  1
General Description  3
Getting The Best From Your QM350i  4
Flying the QM350i  6
QM350i Specifications  8
QM350i Reference Diagram                      9
User Manual Q Motion Series
QM350i

QM350i
User Manual
User Manual Q Motion Series
QM350i
4
Connections
Two Neutrik™ Speakon model NL-4
connectors are mounted in a removable panel
on the rear surface of the box.
The connector input is wired pin 1+ and pin
1-.
Pin 2 is not connected.
Take care when inserting the Speakon
connector twisting the connector until it
locks into place. Reverse the procedure to
disconnect.
Getting The Best From Your QM350i
Suitable Amplification
The QM350i is an 8 ohm enclosure and can
be connected in multiple parallel connections
to an amplifier channel that can operate at
speaker impedances of 4 ohms.
The QM350i is a mid power level high
efficiency system, so ultra high power is not
necessary to obtain high sound pressure
levels. The recommended power range per
amplifier channel is 350 - 500 watts RMS into
an 8Ω load or up to 1,000W RMS into a 4 ohm
load. An ideal partner to the QM350i are any
of the Quest QA range of amplifiers. Setting
the QA amplifier’s high pass filter at 35Hz is
recommended for full range applications. If
you are intending to add sub bass speakers,
the high pass filter can be set to 80Hz.
Recommended QM350i Amplifier Configuration
OUTPUT ASSIGNMENT
PIN 1+ :
PIN 1- :
S I G N A L
GROU ND
LINK A
LINK B
INPUT A
INP U T B
Push To Reset
~220 240 V 10A 50/6 0Hz
OUTPUT A
OUTPUT B
BRIDGE
PIN1:
PIN2:
PIN3:
SIGNAL G ND
SIG NAL +
SIG NA L -
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
OFF 80 Hz 110Hz
LOW PASS -A
26dB
32dB1.4V
GAIN
STEREO PARALLEL BRIDGE
MODE
OFF 35Hz 80Hz
HIGH PASS -B
OFF 80Hz 110Hz
LOW PASS -B
ON OFF
LIMITER
LIFT GR OUND
GROUND
DESIGNED BY QUEST ENGINEERING,AUSTRALIA
MODEL:
OFF 35Hz 80 Hz
HIGH PASS -A
OFF 35Hz 80Hz
HIGH PASS -A
10
1
1 2
5
10
1
5
Reducing low frequency output will make more
amplifier power available for clean vocal reproduction
for full range sound, set the high pass filter to 35Hz

QM350i
User Manual
User Manual
Q Motion Series
QM350i
5
Speaker cables
Speaker cable needs to be as heavy gauge
as conveniently possible for low-loss results.
Light gauge cable (below 1.5mm) will create
extra resistance and waste amplifier power.
This particularly applies to long speaker
runs. The amplifier’s damping factor statistic
(“punch” for the non technical) is greatly
diminished, so keep your speaker cables
short and as heavy gauge as practical.
Speaker Placement as a Single Box
or in Arrays
The QM350i is intended for use as a single
speaker system or as part of a multiple
speaker setup with or without sub bass
reinforcement. It can also be installed in small
arrays of up to three boxes per array for very
wide coverage applications. When a group
of point source 90 degree speaker boxes
are placed together, it is possible to have
“interference effect” between some of the
boxes causing uneven frequency response.
This can be particularly noticeable in the
mid-high frequency area. If you intend to set
up the QM350i as part of a multiple box array,
see the section ‘Flying the QM350i’.
When positioning the speaker system on a
stage, make sure the HF horn at the top of
the speaker box is above the heads of the
audience. At full power the output of the
QM350i is very high and hearing damage can
result from short to medium term exposure.
When used as a drum-fill monitor on a stage,
the box can sit on the stage however consider
that the HF horn will be at ear level for the
average drummer setup.
For best results when the QM350i is used as
a front of house speaker, consider angling the
box forward slightly to direct the HF horn to
cover the audience area. The HF horn should
be aimed away from the ceiling and focused
on the intended area of coverage. This will
minimize HF reflections, lower the reverberant
field in the room and give better intelligibility.
Ideal QM350i Flown Configuration

QM350i
User Manual
User Manual
Q Motion Series
QM350i
7
QM350i Horiztonal Configuration (front) QM350i Horizontal Configuration (front)
QM350i FOH Configuration (side)
QM350i Wave Guide Examples
QM350i FOH Configuration (front)
QM350i Foldback Configuration (side)QM350i Foldback Configuration (front)
+15˚
-45˚
+15˚
-45˚
+15˚
-45˚
45˚
60˚
60˚
45˚
60˚
45˚

QM350i
User Manual
User Manual Q Motion Series
QM350i
8
QM350i Specifications
Technical Parameters
Power Handling 400W RMS
Frequency Response 60-19kHz (+/-3dB)
Sensitivity 95dB @ 1kHz
Maximum SPL @ 1m 128dB
Impedance 8 ohms
Connections and Wiring 2 x Speakon NL4 - 1+/1- (2+/2- through)
Woofer 12” High Power Mid-Bass Woofer
Tweeter 1” Neodymium Compression Driver
Directivity Asymmetric +15/-45 Vertical | 45/60
Horizontal
Dimensions 620x380x346.5 mm
Weight 19.0 kg Net
QM350i - Frequency Response - 2.83V/1m
Frequency (Hz)
100 1k 10k
100
80
60
20 50 200 500 2k 5k 20k
110
90
70
50
20

QM350i
User Manual
User Manual
Q Motion Series
QM350i
9
QM350i Reference Diagram
1 - complete grille
2 - rotating Q badge
5 - 12inch woofer
4 - compression driver
10 - bottom skids (137mm)
11 - pole mount plate
9 - side skids (182mm)
6 - complete x-over
7 - connection plate
4bis - diaphragm
8 - complete connection plate + x-over
5bis - woofer recone kit
No. Description Spare Part
1 Complete Grill (with Acoustic Foam) HGQM350
2 Rotating Q-badge (23mm) with Spring Loaded Pin HQB25
3 Horn Flare (Wave Guide) HWG350
4 1” Compression Driver T1009
4bis 1” Compression Driver Diaphragm RT1009
5 12” Woofer T12001
5bis 12” Woofer Recone Kit RT12001
6 Complete X-Over AXQM350
7 Connection Plate HCPQM350
8 Complete Connection Plate and Complete X-Over ACPQM350
9 Long Skids (182mm) HSK182
10 Medium Skids (137mm) HSK137
11 Pole Mount Plate HPP350

www.questaudio.net
Register Your Product
Thank you for choosing Quest. Please take the time
to complete your product registration card which is
included with the packaging.
Registering your Quest Engineering product will:
• CONFIRM YOUR WARRANTY
• REGISTER YOUR PRODUCT
• PROTECT YOUR NEW PRODUCT
REGISTER ONLINE:
wwwquestaudionet/registration

QM350i
User Manual
User Manual Q Motion Series
QM350i
4
Connections
Two Neutrik™ Speakon model NL-4
connectors are mounted in a removable panel
on the rear surface of the box.
The connector input is wired pin 1+ and pin
1-.
Pin 2 is not connected.
Take care when inserting the Speakon
connector twisting the connector until it
locks into place. Reverse the procedure to
disconnect.
Getting The Best From Your QM350i
Suitable Amplification
The QM350i is an 8 ohm enclosure and can
be connected in multiple parallel connections
to an amplifier channel that can operate at
speaker impedances of 4 ohms.
The QM350i is a mid power level high
efficiency system, so ultra high power is not
necessary to obtain high sound pressure
levels. The recommended power range per
amplifier channel is 350 - 500 watts RMS into
an 8Ω load or up to 1,000W RMS into a 4 ohm
load. An ideal partner to the QM350i are any
of the Quest QA range of amplifiers. Setting
the QA amplifier’s high pass filter at 35Hz is
recommended for full range applications. If
you are intending to add sub bass speakers,
the high pass filter can be set to 80Hz.
Recommended QM350i Amplifier Configuration
OUTPUTASSIGNMENT
PIN1+ :
PIN1- :
SIGNA L
GROUND
LINK A
LINK B
INPUT A
INPU T B
Push ToReset
~220 240V10A 50/60Hz
OUTPUT A
OUTPUT B
BRIDGE
PIN1:
PIN2:
PIN3:
SIGNAL G N D
SIG NAL +
SIGNA L -
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
OFF 80Hz 110Hz
LOWPASS -A
26dB
32dB1.4V
GAIN
STEREO PARALLEL BRIDGE
MODE
OFF 35Hz 80Hz
HIGHPASS -B
OFF 80Hz 110Hz
LOWPASS -B
ON OFF
LIMITER
LIFT GROUND
GROUND
DESIGNED BY QUEST ENGINEERING,AUSTRALIA
MODEL:
OFF 35Hz 80Hz
HIGHPASS -A
OFF 35Hz 80Hz
HIGH PASS -A
10
1
1 2
5
10
1
5
Reducing low frequency output will make more
amplifier power available for clean vocal reproduction
for full range sound, set the high pass filter to 35Hz

QM350i
User Manual
User Manual
Q Motion Series
QM350i
5
Speaker cables
Speaker cable needs to be as heavy gauge
as conveniently possible for low-loss results.
Light gauge cable (below 1.5mm) will create
extra resistance and waste amplifier power.
This particularly applies to long speaker
runs. The amplifier’s damping factor statistic
(“punch” for the non technical) is greatly
diminished, so keep your speaker cables
short and as heavy gauge as practical.
Speaker Placement as a Single Box
or in Arrays
The QM350i is intended for use as a single
speaker system or as part of a multiple
speaker setup with or without sub bass
reinforcement. It can also be installed in small
arrays of up to three boxes per array for very
wide coverage applications. When a group
of point source 90 degree speaker boxes
are placed together, it is possible to have
“interference effect” between some of the
boxes causing uneven frequency response.
This can be particularly noticeable in the
mid-high frequency area. If you intend to set
up the QM350i as part of a multiple box array,
see the section ‘Flying the QM350i’.
When positioning the speaker system on a
stage, make sure the HF horn at the top of
the speaker box is above the heads of the
audience. At full power the output of the
QM350i is very high and hearing damage can
result from short to medium term exposure.
When used as a drum-fill monitor on a stage,
the box can sit on the stage however consider
that the HF horn will be at ear level for the
average drummer setup.
For best results when the QM350i is used as
a front of house speaker, consider angling the
box forward slightly to direct the HF horn to
cover the audience area. The HF horn should
be aimed away from the ceiling and focused
on the intended area of coverage. This will
minimize HF reflections, lower the reverberant
field in the room and give better intelligibility.
Ideal QM350i Flown Configuration

QM350i
User Manual
User Manual
Q Motion Series
QM350i
7
QM350i Horiztonal Configuration (front) QM350i Horizontal Configuration (front)
QM350i FOH Configuration (side)
QM350i Wave Guide Examples
QM350i FOH Configuration (front)
QM350i Foldback Configuration (side)QM350i Foldback Configuration (front)
+15˚
-45˚
+15˚
-45˚
+15˚
-45˚
45˚
60˚
60˚
45˚
60˚
45˚