Monitor Audio Platinum 3G Series User manual

Product Manual

2 3
Thank you for purchasing this Platinum Series 3G speaker,
you’re now ready to start your journey to breathtaking sound.
In this product manual, you’ll nd information about setting up your system
and how to maintain your speakers for a lifetime of enjoyment.
If you need any further assistance, please contact our technical team
at monitoraudio.com/support
Welcome to Platinum Series 3G
Register your speakers using the QR code
or visit monitoraudio.com/registration
Register your Platinum Series 3G speakers
Contents
Unboxing 4
Spikes & feet 6
Setting up your system 8
Wiring your speakers 14
Using your speakers 16
Care & maintenance 18
Warranty 20
Specifications 21

4 5
Before you unpack your loudspeakers, please make sure that there is plenty
of clean oor area available.
WARNING: DO NOT attempt to lift any of the loudspeakers alone.
The recommended number of people is printed on the outer carton.
Lay the box down on the oor so the opening is on the side facing up. Open the outer
carton and then use the handles of the inner cardboard sleeve to lift the loudspeaker
and packaging out of the box. Remove the polystyrene end caps and t the spikes
(where applicable). Please refer to the Spikes and Feet section (Pg 6).
Unboxing
Platinum 100 3G
Platinum C250 3G
Platinum 200 & 300 3G

6 7
Spikes and feet
Use on wooden or hard oors
The outriggers are supplied assembled, tted to the cabinet for use on non-carpeted,
wooden / hard oors or where spikes are inappropriate. All that is required is to position
the loudspeaker in its listening position, and check it is level and stable.
Use on carpeted oors
If the loudspeaker is being installed on a carpeted oor, screw the spike into the foot
and outrigger assembly. Position the loudspeaker in its listening position and check it is
level and stable.
Please ensure there are no hidden wires under the carpet that could be
damaged by the spikes.
Levelling the speaker
You can check that the loudspeaker is level on all sides by using a spirit level (not
supplied). If it’s slightly uneven, remove the top cap (held in place magnetically) and
unscrew the foot at the lowest point using the supplied Hex key as illustrated below and
check again. Continue this process until the cabinet is fully level, then replace the top
cap.
Platinum 100 3G feet
Platinum 100 3G comes with 8 self
adhesive rubber feet in the packaging.
These should be placed around the
inserts on the bottom of the cabinet when
placing the speakers on a shelf or when
using third party stands for the speakers.
This isolates the speaker to prevent
it from moving.
Top Cap
Outrigger
(Attached to cabinet)
Rubber Foot
Spike

8 9
Setting up your system
2 channel system
When arranging a 2 channel system, the listening position and the loudspeakers should
form an equilateral triangle. Ideally the loudspeakers should be positioned approximately
6 - 10 feet (1.8 - 3m) apart and a minimum of 3 feet (91cm) from the side walls. The ideal
distance from the rear wall varies depending on the loudspeaker (see list below).
NOTE: These are recommended distances for optimal performance.
Actual results will vary dependant on room size, construction and personal tastes.
Experimentation is strongly advised when setting up the loudspeakers, as environment
and personal preference will differ with every installation.
If there is insufcient bass for example, try moving your loudspeakers closer to the rear
wall. The opposite approach is recommended if there is excessive bass. Additionally
refer to the information relating to port bungs on page 19. If stereo imaging is being lost,
try ‘toeing’ them in slightly. Sounds that are recorded equally to each channel should
sound as though they come from between the speakers.
Platinum 100 3G 15 - 30 cm / 6 - 12”
Platinum 200 3G 20 - 36 cm / 8 - 14”
Platinum 300 3G 30 - 61 cm / 12 - 24”
x mx m
x m

10 11
Setting up your system
AV positioning
Please refer to the illustration on the right for the ideal angles and positions of each
loudspeaker in your surround system. The loudspeakers should be distanced from
the wall according to the requirements of the loudspeaker, which are listed in the
2-Channel Positioning section above. However, due to AV receiver crossover lter
settings, they may be positioned closer to the wall. Experimentation is advised.
NOTE: The images are for illustrative purposes only. See diagram on the right.
A - Side surround loudspeakers
B - Rear surround loudspeakers
A 7.1 surround system will make use of side (position A) and rear loudspeakers (position
B) to create a full 360° soundstage, if setting up a 5.1 system you should place your
surrounds in position (A).
If the sound is too bass heavy or there is bass boom from the room when playing music
(without a subwoofer), try moving the loudspeakers slightly further away from the wall(s).
In a system with a subwoofer, try adjusting the crossover frequency settings for the
loudspeakers and/or subwoofer or changing the subwoofer’s position. If placed in a
corner, the subwoofer can over excite certain room modes.
If there doesn’t seem to be much bass from the system, check what the AV receiver has
set the speaker size to. If the loudspeakers have been set to large as part of the auto
setup, try setting them to small, which will send more bass frequencies to the subwoofer.
Also check the crossover frequencies of the loudspeakers and subwoofer as well as the
individual channel levels.
The Platinum C250 centre channel should be positioned so that it is pointing at the
viewing position and at approximate ear height.
7.1 = A + B
5.1 = A
A A
BB

12 13
Setting up your system
Dolby Atmos®
When arranging the overhead channels in an Dolby Atmos®system, we would
recommend using our three-way in-ceiling loudspeakers such as our Platinum
PLIC II loudspeakers . These employ a unique midrange/ tweeter module, which
offers a wider dispersion characteristic, and are ideal for Dolby Atmos®duties.
Please see the diagram on the right for ideal positioning of 2 or 4 Dolby Atmos®
loudspeaker setups. Typically these would be in line with the front left and right
loudspeakers.
65°
100°
Ear Level
80°
30°
125°
150°
45° 55°
Ear Level
135°

14 15
Wiring your speakers
Single wiring
Single wiring is achieved via a single set of cables to the terminals on the back of
the loudspeaker. Internally the loudspeaker crossover guides the frequencies to the
appropriate driver/ tweeter. Low frequencies to the bass drivers, mid frequencies to the
mid/bass drivers and high frequencies to the tweeter.
NOTE: When using this method you must keep the terminal links in place.
Bi-wiring
Bi-wiring is accomplished by connecting separate pairs of loudspeaker cables to the
terminals on the loudspeaker from a single pair of connections on the amplier. In the
case of the Platinum Series, the bottom terminals connect to the bass driver(s) and the
top terminals connect to the tweeter in 2 way loudspeakers, or the mid and tweeter in 3
way loudspeakers.
NOTE: When using this method you must REMOVE the terminal links.
Bi-amping
Bi-amping is the same as bi-wiring except you are introducing a second amplier into
the equation.
In order to bi-amp you must connect a set of loudspeaker cables to the top terminals
on the loudspeaker from one amplier and another set of loudspeaker cables to the
bottom terminals from the second amplier.
NOTE: When using this method you must REMOVE the terminal links.
RightIntergrated Amplifier
+
-
+
-
Left
RightIntergrated Amplifier
+
-
+
-
Left
RightIntergrated Amplifier
+
-
+
-
Left
RightPower Amplifier
+
-
+
-
Left
For more information on Bi-wiring and Bi-amping,
please visit monitoraudio.com/support/faq/

16 17
Using your speakers
Running-in your loudspeakers
Run your loudspeakers in by playing normal music at low-mid listening levels for
approximately 50-70 hours play time. You may nd the sound will continue to improve
even after the 70 hour mark.
This can be done naturally over time: like a ne wine the performance will improve
with age.
Alternatively if you wish to run the loudspeakers continuously on loop you can decrease
the audible volume/presence by placing the loudspeakers face-to-face so that
the drivers/tweeters are directly aligned and as close as possible. Then connect the
amplier to your loudspeakers so that one is as normal (in phase): positive to positive
and negative to negative (red to red and black to black), and the other loudspeaker out
of phase: positive to negative and negative to positive inputs on the loudspeaker.
Port Bungs
If the loudspeaker is to be installed in a small room, typically 9 sqM (80 sqFT), or a room
known to reproduce accentuated bass response, it may be desirable to t a port bung in
the affected speaker. However, experimentation is recommended with positioning of the
loudspeaker in the room prior to tting. To optimise performance from the loudspeaker
it is important to ensure the loudspeaker is not positioned too close to a wall or near the
corners of a room.
If the positioning of the loudspeaker is predetermined by room aesthetics or layout,
you nd you have accentuated bass or in the case speakers are to be sited in close
proximity (less than the minimum suggested distances of page 2) to a rear wall (such
as on a bookshelf, positioned in a cabinet or on a stand close to a wall), we recommend
tting the supplied port bungs to the ports. With speakers that have 2 ports, such as the
Platinum 300 3G, only one port bung should still be used per speaker.
This will reduce the bass ‘boom’ sometimes termed as overhang, and assist the
loudspeakers to reproduce their best performance under these environmental
conditions. ‘Boom’ is generally caused when bass energy from the loudspeaker ‘excites’
room modes and causes an accentuation at a particular frequency, or number of
frequencies.
When tting port bungs the overall bass extension will not be reduced, however bass
energy/ output around the port tuning frequency will be reduced. This has the effect
of reducing bass ‘boom’ while increasing bass clarity and apparent agility.
In all circumstances experimentation is highly recommended.

18 19
Care & maintenance
Upkeep of cabinets
The high gloss nish of the cabinet can be maintained by regular dusting using
a soft cloth or micro bre cloth. When the nish needs to be revived a high-quality,
non-abrasive, automotive wax or polish can be used. The drive units should only
be cleaned with a damp cloth if more than normal dusting is required.
Never use solvents or aggressive cleaning/polishing agents on your Platinum Series 3G
loudspeakers. When in doubt, test the cleaning product on an inconspicuous area
on the cabinet and let it sit for several days before committing to its use on visible
portions of the cabinet.
Retention Bolt adjustment
The new Platinum Series has a bolt-through driver xing to reduce cabinet colouration.
Each bolt acts as a rigid brace, but also removes the need for conventional driver xings
as well, effectively decoupling the driver and front bafe to eliminate a further source of
resonance.
NOTE: Should this bolt become loose over time, or has worked loose during transit, then
please use the supplied torx key to tighten the bolt back up. This only needs to be a
quarter turn after the strain has been taken by the bolt.

20 21
Warranty
In the unlikely event that there is a defect with this product, it is covered by
the Monitor Audio manufacturer’s warranty, provided that the product was
supplied by an authorised Monitor Audio retailer.
For the period of cover please refer to the product page on our website
at monitoraudio.com
Register your product at monitoraudio.com/registration
Specications
Model Platinum 100 3G Platinum 200 3G Platinum 300 3G Platinum C250 3G
System Format 2-way 3-way 3-way 3-way
Frequency response
(-6dB) Free-Field 37 Hz – >60 kHz 32 Hz – >60 kHz 25 Hz – >60 kHz 48 Hz – >60 kHz
Frequency response
(-6dB) In room 28 Hz – >60 kHz 23 Hz – >60 kHz 17 Hz – >60 kHz 30 Hz – >60 kHz
Sensitivity
(2.83v @ 1m) 85 dB 88 dB 88 dB 88 dB
Nominal impedance 4 Ohms 4 Ohms 4 Ohms 4 Ohms
Minimum
Impedance 4.0 Ohms @ 180 Hz 4.0 Ohms @ 2.5 kHz 4.0 Ohms @ 3.75 kHz 4.0 Ohms @ 150 Hz
Continuous Power
Handling
(RMS into 4 Ohms,
Pink Noise with 6dB
Crest Factor)
150 W 300 W 400 W 300 W
Recommended
Amplier Power
(RMS into 4 Ohm,
Music Signal)
75-300 W 150-600 W 200-800 W 150-600 W
Bass Alignment Ported Ported Ported Sealed
Port Tuning
Frequency 44 Hz 38 Hz 32 Hz N/A
Crossover
Frequency LF/HF: 2.85 kHz LF/MF: 825 Hz MF/HF: 3 kHz LF/MF: 650 Hz MF/HF: 3 kHz LF/MF: 850 Hz MF/HF: 3.5 kHz
Drive Unit
Complement
1 x 6” RDT III
bass driver
1 x MPD III tweeter
2 x 6” RDT III
bass driver
1 x 4” RDT III
mid-range driver
1 x MPD III tweeter
2 x 8” RDT III
bass driver
1 x 4” RDT III
mid-range driver
1 x MPD III tweeter
2 x 6” RDT III
bass driver
1 x 2.5” RDT III
mid-range driver
1 x MPD III tweeter
External Dimensions
including Terminals
(H x W x D)
398 x 225 x 326 mm
155/8 x 813/16 x 1213/16”
1025 x 369 x 455 mm
405/16 x 141/2 x 1713/16”
1115 x 430 x 524 mm
441/2 x 167/8 x 205/8”
225 x 630 x 326 mm
813/16 x 2413/16 x 1213/16”
External Dimensions
including Outrigger
Feet and Spikes
(H x W x D)
N/A 1042 x 369 x 455 mm
41 x 141/2 x 1713/16”
1131 x 430 x 524 mm
441/2 x 167/8 x 205/8”N/A
Weight (Each) 15.2 kg
33 lb 8 oz
35.8 kg
78 lb 14 oz
53.6 kg
118 lb 2 oz
25.4 kg
55 lb 15 oz
Finishes Piano Ebony, Piano Black, Matte White

Monitor Audio Ltd.
24 Brook Road
Rayleigh, Essex
SS6 7XJ
England
Tel: [phone]
Email: [email protected]
monitoraudio.com
©Monitor Audio Ltd. | V1-2022 - Platinum Series 3G Manual
Dolby, Dolby Atmos, and the double-D symbol are trademarks of Dolby Laboratories.