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Monitor Audio Platinum 100 3G vs Monitor Audio Platinum 300 3G Comparison

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Monitor Audio Platinum 100 3G

Passive Bookshelf | 28-60k Hz​

Monitor Audio Platinum 100 3G
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Monitor Audio Platinum 300 3G

Passive Floor-standing | 17-60k Hz​

Monitor Audio Platinum 300 3G
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Monitor Audio Platinum 100 3G Monitor Audio Platin...
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Monitor Audio Platinum 300 3G Monitor Audio Platin...
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Monitor Audio Platinum 100 3G vs Monitor Audio Platinum 300 3G Speaker Comparison

In this review, we will be comparing two different type of speakers by Monitor Audio. Monitor Audio Platinum 100 3G is a Bookshelf speaker whereas the Platinum 300 3G is a Floor-standing speaker.

Let's have a brief look at the main features of Monitor Audio Platinum 100 3G and Monitor Audio Platinum 300 3G first before getting into our more detailed comparison.

Monitor Audio Platinum 100 3G Key Specs

  • 2-way Design
  • 1" Tweeter
  • 6" RDT III Woofer
  • 28-60k Hz​ Frequency Response
  • 85dB Sensitivity
  • Impedance: 4ohms
  • Power Range:up to 150watts
  • Weight:15.20kg
  • Dimensions (H x W x D): 398.0" x 8.8" x 12.8"( 398 x 225 x 325.6 mm )

Monitor Audio Platinum 300 3G Key Specs

  • 3-way Design
  • 1" Tweeter
  • 4" Midrange
  • 2 x 8" RDT III Woofer
  • 4" Midrange
  • 17-60k Hz​ Frequency Response
  • 88dB Sensitivity
  • Impedance: 4ohms
  • Power Range:up to 400watts
  • Weight:53.60kg
  • Dimensions (H x W x D): 1131.0" x 16.9" x 20.6"( 1131.1 x 429.8 x 525 mm​ )

Platinum 100 3G and Platinum 300 3G are members of Monitor Audio's Platinum 3G series of speakers. Below you can find the loudspeakers from this series.

Monitor Audio Platinum 3G Series History
Model Body Frequency SensitivityImpedance Woofer
Monitor Audio Platinum 100 3G
Bookshelf 28-60k Hz​ 85dB4Ω 1 x 6"
Monitor Audio Platinum 300 3G
Floor-standing 17-60k Hz​ 88dB4Ω 2 x 8"
Monitor Audio Platinum 200 3G
  
Floor-standing 23-60k Hz 88dB4Ω 1 x 6"
Monitor Audio Platinum C250 3G
  
Center Channel 30-60k Hz​ 88dB4Ω 2 x 5"

What size room are the Monitor Audio Platinum 100 3G and Monitor Audio Platinum 300 3G speakers good for?

The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:

Listening Environment* Monitor Audio Platinum 100 3G Monitor Audio Platinum 300 3G
Near-field Poor Bad
Small Room Average Poor
Mid-size Room Good Average
Large Room Average Good
Very Large Room Poor Average

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)

In the following sections, we will get into more detail in order to better understand how the Monitor Audio Platinum 100 3G and Monitor Audio Platinum 300 3G compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.


Drivers

One of the fundamental differences between these two speakers is that Platinum 100 3G is a 2-way design whereas the Platinum 300 3G is a 3-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.

Driver Monitor Audio Platinum 100 3G Monitor Audio Platinum 300 3G
Driver Setup 2-way 3-way
Tweeter 1-inch 1-inch
Midrange - 1 x 4-inch
Woofer 1 x 6-inch 2 x 8-inch

Platinum 100 3G features a 1" MPD III Tweeter and 1 x 6" RDT III Woofer with a Crossover frequency at 2850 Hz. On the other hand, the Platinum 300 3G features a 1" MPD III Tweeter , a 4" Midrange and 2 x 8" RDT III Woofer with a Crossover frequency at 650 Hz​ - 3000 Hz.

Frequency Response

Platinum 100 3G has a frequency range of 28-60k Hz​ whereas Platinum 300 3G has a frequency range of 17-60k Hz​. With a minimum frequency of 17Hz, the Platinum 300 3G can go significantly deeper on the low side and provide stronger bass compared to the Platinum 100 3G's min frequency of 28Hz.

Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Bookshelf class in our database.

Low Frequency

Bookshelf Speakers

Platinum 100 3G
Platinum 300 3G
Min
Average
Max
High Frequency

Bookshelf Speakers

Monitor Audio Platinum 100 3G
Monitor Audio Platinum 300 3G
Min
Average
Max

Impedance and Sensitivity

Platinum 100 3G and Platinum 300 3G have the same Impedance of 4 ohms but where they differ is the sensitivity levels. Platinum 100 3G sensitivity is rated at 85dB and the Platinum 300 3G's is at 88dB. This 3 dB difference makes the Monitor Audio Platinum 300 3G a more sensitive speaker compared to Monitor Audio Platinum 100 3G, hence will play louder with the same amount of watts.

One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the Platinum 100 3G and the Platinum 100 3G can provide this impedance level.

Sensitivity

Bookshelf Speakers

Platinum 100 3G
Platinum 300 3G
Min
Average
Max

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.

Platinum 100 3G can handle a max power of 400 watts RMS from the amp the whereas Platinum 100 3G has a max power handling value of 150 watts RMS , 250 watts less than the Platinum 300 3G.

Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.

Input Type and Bi-Amping / Bi-Wiring

Both Platinum 100 3G and Platinum 300 3G features dual binding post speaker terminals for bi-amping or bi-wiring.

Monitor Audio Platinum 100 3G Terminals
Monitor Audio Platinum 100 3G's Binding post terminals allows Bi-amping or bi-wiring

Monitor Audio Platinum 300 3GBinding post Terminals
Monitor Audio Platinum 300 3G's Binding post terminals allows Bi-amping or bi-wiring

Cabinet Type and Port Position

Both Platinum 100 3G and Platinum 300 3G have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.

If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.

Monitor Audio Platinum 100 3G  Port
Monitor Audio Platinum 100 3G Port

Monitor Audio Platinum 300 3G  Port
Monitor Audio Platinum 300 3G Port

Physical Specs

Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Monitor Audio Platinum 100 3G's and Monitor Audio Platinum 300 3G's external dimensions. Monitor Audio Platinum 100 3G has external dimensions of 398 x 225 x 325.6 mm ( 15.6 x 8.8 x 12.8-inch) whereas Monitor Audio Platinum 300 3G has external dimensions of 1131.1 x 429.8 x 525 mm​ ( 44.5 x 16.9 x 20.6-inch) .

Monitor Audio Platinum 300 3G is clearly the larger of the two speakers. Its body is 205mm wider, 733mm taller and 200mm deeper than Monitor Audio Platinum 100 3G.

Below you can see the front view size comparison of Monitor Audio Platinum 100 3G and Monitor Audio Platinum 300 3G in scale.

Monitor Audio Platinum 100 3G vs Monitor Audio Platinum 300 3G Size Comparison - Front View
Comparison image of Monitor Audio Platinum 100 3G and Monitor Audio Platinum 300 3G Size and External Dimensions

Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base surface area of the Monitor Audio Platinum 100 3G is approximately 731.3cm2 / 113.4inch2 and base area of the Monitor Audio Platinum 300 3G is approximately 2257.5cm2 / 349.9inch2. The Platinum 100 3G requires 68% less surface area than the Platinum 300 3G which gives it a small advantage on placement in tight spaces.


Reasons to choose Monitor Audio Platinum 100 3G over Monitor Audio Platinum 300 3G
Height 398mm vs 1131mm Easier to fit in smaller spaces
Base Surface Area 731cm2 vs 2257cm2 Takes less floor space
Price per pair* 6900USD vs 17900USD costs less (*prices may change depending on the seller, location and time)

Reasons to choose Monitor Audio Platinum 300 3G over Monitor Audio Platinum 100 3G

Max Input Power 400 watts vs 150 watts Handle more power from your amplifier
Driver Setup 3-way vs 2-way Have a dedicated mid-range driver
Sensitivity 88 dB vs 85 dB Play louder with same amount of amplification power
Woofer Size 8 inches vs 6 inches Larger woofer
Number of Woofers 2 vs 1 More woofers
Low Frequency Response 17 Hz vs 28 Hz Generates deeper bass
Monitor Audio Platinum 100 3G vs Monitor Audio Platinum 300 3G Specs Table
Detailed comparison of specifications
General Monitor Audio Platinum 100 3G Monitor Audio Platinum 300 3G
Brand Monitor Audio Monitor Audio
Speaker Type Bookshelf speakers Floor-standing speaker
Power Range up to 150 watts up to 400 watts
Sensitivity 85dB 88dB
Impedance 4 ohms 4 ohms
Impedance 4 ohms 4 ohms
Frequency Response 28-60k Hz​ 17-60k Hz​
Drivers
Woofer Quantity 1 2
Woofer Size 6" 8"
Woofer Composition RDT III RDT III
Tweeter Size 1" 1"
Aimable Tweeter No No
Midrange Driver No 4"
Crossover Frequency 2850 Hz 650 Hz​ - 3000 Hz
Firing Direction rear rear
Physical Specs
Height 398.0mm (15.7") 1131.0mm (44.5")
Width 225.0mm (8.9") 430.0mm (16.9")
Depth 325.0mm (12.8") 525.0mm (20.7")
Weight 15.20kg (33.4lbs) 53.60kg (117.9lbs)
Enclosure Bass Reflex Bass Reflex
Available Colors Piano Black, Piano Ebony, Satin White Piano Black, Piano Ebony, Satin White
Mounting Bracket No No
Moisture Resistancy No No
Connections
Biamp Inputs Yes Yes
Other
Parts Warranty 5 Years 5 Years
Labor Warranty 5 Years 5 Years

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