Monitor Audio
Monitor Audio Platinum 100 3G
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The Platinum 100 3G is a compact 2-way speaker that features an MPD III transducer and a 6” RDT III mid-bass driver cone. It offers an utterly compelling listening experience from a relatively small cabinet.
Key Features:
- MPD III transducer
- 6” RDT III mid-bass driver
- Exceptional listening experience
- Rear-ported
- Mount points for the previous Platinum 2G Stand
- Directly compatible with the new ST-2 Universal Stand
- Perfect for smaller high-performance music set-ups
- Embellished with etched inlays

"Among the most engaging loudspeakers around, pound-for-pound"

Objects of Desire
The Platinum 100 3G is engineered to deliver a truly exceptional listening experience from a relatively diminutive loudspeaker. With its new RDT III mid-bass driver cone and MPD III transducer, the Platinum 100 3G has been significantly improved over the previous generation, and sound is presented with a purity and precision that makes for an astoundingly engaging experience.
The speaker also includes mount points for the previous Platinum 2G Stand and the new ST-2 Universal Stand.
Specifications
Category |
Details |
|---|---|
| System Format | 2-Way |
| Frequency Response, Free-Field (-6dB) | 37 Hz – 60 kHz |
| Frequency Response, In-Room (-6dB) | 28 Hz – 60 kHz |
| Sensitivity (2.83 Vrms @ 1m, Free-Field) | 85 dB |
| Nominal Impedance | 4 Ohms |
| Minimum Impedance (20 Hz to 20 kHz) | 4.0 Ohms @ 180 Hz |
| Continuous Power Handling (RMS into 4 Ohms, Pink Noise with 6dB Crest Factor) | 150 W |
| Recommended Amplifier Power (RMS into 4 Ohm, Music Signal) | 75 – 300 W |
| Bass Alignment | Ported |
| Port Tuning Frequency | 44 Hz |
| Crossover Frequency |
LF/HF: 2.85 kHz
|
| Drive Unit Complement |
1 x 6" RDT III bass driver 1 x MPD III tweeter |
| External Dimensions including Trims, Terminals & Outrigger Feet & Spikes (H x W x D) | 398 x 225 x 325.6 mm (15.6 x 8.8 x 12.8") |
| External Dimensions including Trims, Terminals & Outrigger Feet without spikes (H x W x D) | N/A |
| Weight (each) | 15.2 kg (33 lb 8 oz) |
| Warranty | 5 years |

Objects of Desire
Platinum Series 3G is a culmination of ground-breaking acoustic innovations brought together in a number of expertly crafted designs that celebrate the rich legacy of the Platinum Series. The range cements Monitor Audio’s deserved place within the high-end, premium loudspeaker space and represents a purity of sound and design beautifully entwined – the launch, a highpoint in the brands 50th Anniversary.
The definition of elegance
Platinum Series has always represented Monitor Audio’s engineering and design prowess and the 3rd generation is no exception. Our UK-based design team worked closely with our acoustic engineers to deliver an aesthetic that celebrates the high-performance components without overpowering its surroundings.
The cabinet design on Platinum Series 3G is all new. Beautifully detailed and expertly crafted, our industry-leading attention to detail and passion for quality ensures that each cabinet is elegant and refined on the eyes, while being engineered for total acoustic performance.
Constructed using laminated layers of MDF to form a curved and braced super rigid 18-21mm cabinet on the rear with a 36mm thick baffle precision machined to create a unique curved front profile. The cabinets are then embellished with etched inlays to highlight the craftsmanship, before 16 layers of lacquer are added on top to create a beautiful, luxury piano gloss finish. A pure satin matte finish is applied to models finished in white - a contemporary statement in any interior.
A technical legacy with 'Concept 50' technology
Platinum Series 3G builds on two generations of loudspeaker design, which has consistently evolved at each step. We have introduced a ground-up new MPD III transducer, developed for the ‘Concept 50’ speaker, which improves on every aspect, as well as improvements to the mid and bass driver cones called RDT III - a further significant development in driver technology.
Pinpoint accuracy for lifelike sound.
New MPD III high frequency transducer. The improvements help to reduce distortion and flatten the frequency response leading to a clear and consistent sound across all your music.
Precision perfect
The Rigid Diaphragm Technology III (RDT III) cone has three new optimisations over its predecessor. Firstly, a new rear layer featuring two uniform layers of carbon fibre skin helps reduce cone breakup, as does an optimised rubber surround. Finally, an optimised cone edge treatment extends the passband of the drivers. When combined, these innovations significantly increase the useable bandwidth, enabling improvements to the crossover and final response of the speaker. The result: Platinum 3G mid and bass drivers boast the lowest distortion of any Monitor Audio speaker in its history.
Clever design is more than skin deep
Platinum series has always represented Monitor Audio’s engineering and design prowess and the 3rd generation is no exception. Our UK based design team have worked closely with the acoustic team to deliver an aesthetic which celebrates the performance components without overpowering its surroundings.
Aluminium Driver Frames.
The drivers on the Platinum Series 3G are held in place with individually cast aluminium frames, creating two layers of isolation between the driver chassis and the cabinet.
New Outrigger Feet
The new Platinum outrigger foot assemblies have been precision engineered to form a solid platform for the floorstanding speakers while presenting a more elegant aesthetic compared to a cumbersome plinth.
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