In this review, we will be comparing two different type of speakers by Monitor Audio. Monitor Audio Platinum 300 3G is a Floor-standing speaker whereas the Platinum C250 3G is a Center Channel speaker.
Let's have a brief look at the main features
of Monitor Audio Platinum 300 3G and Monitor Audio Platinum C250 3G first before getting into our more
detailed comparison.
Monitor Audio Platinum 300 3G Key Specs
- 3-way Design
- 1" Tweeter
- 4" Midrange
- 2 x 8" RDT III Woofer
- 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 )
Monitor Audio Platinum C250 3G Key Specs
- 3-way Design
- 1" Tweeter
- 2.5" Midrange
- 2 x 5" RDT III Woofer
- 2.5" Midrange
- 30-60k Hz Frequency Response
- 88dB Sensitivity
- Impedance: 4ohms
- Power Range:up to 300watts
- Weight:25.40kg
- Dimensions (H x W x D): 225.0" x 24.8" x 12.8"( 225 x 630 x 325.7 mm )
Platinum 300 3G and Platinum C250 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
What size room are the Monitor Audio Platinum 300 3G and Monitor Audio Platinum C250 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 300 3G |
Monitor Audio Platinum C250 3G |
| Near-field |
Bad |
Poor |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
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 300 3G and Monitor Audio Platinum C250 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
Both Platinum 300 3G and Platinum C250 3G are 3-way speakers.
| Driver |
Monitor Audio Platinum 300 3G |
Monitor Audio Platinum C250 3G |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 4-inch |
1 x 2.5-inch |
|
Woofer
|
2 x 8-inch
|
2 x 5-inch
|
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. On the other hand, the Platinum C250 3G features a 1" MPD III Tweeter , a 2.5" Midrange and 2 x 5" RDT III Woofer with a Crossover frequency at 850 Hz - 3500 Hz.
Frequency Response
Platinum 300 3G has a frequency range of 17-60k Hz whereas Platinum C250 3G has a frequency range of 30-60k 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 C250 3G's min frequency of 30Hz.
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 Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing Speakers
Monitor Audio Platinum 300 3G
Monitor Audio Platinum C250 3G
Impedance and Sensitivity
Platinum 300 3G and Platinum C250 3G have the same Impedance of 4 ohms and their sensitivity is also same at 88 dB.
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 300 3G and the Platinum 300 3G can provide this impedance level.
Sensitivity
Floor-standing Speakers
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 300 3G can handle a max power of 400 watts RMS from the amp the whereas Platinum C250 3G has a max power handling value of 300 watts RMS, 100 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 300 3G and Platinum C250 3G features dual binding post speaker terminals for bi-amping or bi-wiring.
Monitor Audio Platinum 300 3G's Binding post terminals allows Bi-amping or bi-wiring
Monitor Audio Platinum C250 3G's Binding post terminals allows Bi-amping or bi-wiring
Monitor Audio Platinum 300 3G Port
Monitor Audio Platinum C250 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 300 3G's and Monitor Audio Platinum C250 3G's external dimensions. 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) whereas Monitor Audio Platinum C250 3G has external dimensions of 225 x 630 x 325.7 mm ( 8.8 x 24.8 x 12.8-inch) .
Monitor Audio Platinum C250 3G is 906mm shorter and 199mm less deeper than Monitor Audio Platinum 300 3G but it is also 200mm wider.
Below you can see the front view size comparison of Monitor Audio Platinum 300 3G and Monitor Audio Platinum C250 3G in scale.
Comparison image of Monitor Audio Platinum 300 3G and Monitor Audio Platinum C250 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 300 3G is approximately 2257.5cm2 / 349.9inch2 and base area of the Monitor Audio Platinum C250 3G is approximately 2053.8cm2 / 318.3inch2. The Platinum 300 3G requires 10% more surface area than the Platinum C250 3G which gives it a small disadvantage on placement in tight spaces.
Max Input Power 
Woofer Size 
Height 
Base Surface Area 
Price per pair*