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Description
Monitor Audio Platinum 3G In-Wall SpeakerPlatinum In Wall 3G is Monitor Audios flagship high performance, architectural, in wall speaker. It is designed for use in high end audio and movie systems, where accurate, clear and lifelike sound is required. With the minimum of room intrusion but with maximum scale and sonic impact. Platinum In Wall 3G can be installed either vertically or horizontally, which means it can be used on any channel within a system and is ideal for LCR applications and
Platinum In-Wall 3G is Monitor Audio’s flagship high-performance, architectural, in-wall speaker. It is designed for use in high-end audio and movie systems, where accurate, clear and lifelike sound is required. With the minimum of room intrusion but with maximum scale and sonic impact. Platinum In-Wall 3G can be installed either vertically or horizontally, which means it can be used on any channel within a system and is ideal for LCR applications and for seamless tonal accuracy within a theatre system.
Key Features
- 1 x MPD III high-frequency transducer for a larger, clearer, and more lifelike sound
- 1 x 4” RDT III mid-bass driver for incredible levels of clarity and scale
- 2 x 6” RDT III bass drivers for exceptional weight and depth
- Patented 'DCF' (Dynamic Coupling Filter) mechanism for more natural sound
- Bespoke speaker terminals and footings
- Underhung, edge-wound voice coils: greater driver efficiency and lifelike dynamics, less distortion
- Rigid cabinet construction made from 25 mm MDF with steel back
- Extensive internal bracing using thick MDF cross bracing techniques
Specifications:
General
- Recommended Power 150-600 watts
- Impedance 4 Ω
- Frequency Response, Free-Field (-6dB) 41 Hz – >60 kHz 41 Hz – 60 kHz
- Frequency Response, In-Room (-6dB) 27 Hz – >60 kHz
- Sensitivity 88.00 dB
Drivers
- MPD III tweeter
- 2 x 6" RDT III bass drivers
- 1 x 4" RDT III mid-range driver
- Bass Alignment Sealed
External Dimensions (Including Grille and Terminals)
Height 120.7 cm Width 33.2 cm Depth 10.6 cm Weight 27.7 kg
Cut-Out Dimensions
Height 117.5 cm Width 30.0 cm Depth 97.5 cm
Crossover Frequency
LF/MF: 825 hz MF/HF: 3 kHz
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Worth the price
Size: 5.25” Woofer
I had in ceiling front speakers and went with these instead. The front ceilings are now height speakers. Sounds great now.
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Reviewed in the United States on January 23, 2026
★★★★★ 5
Small but mighty
Size: 5.25” Woofer
Great sound. I can turn my stereo up loader than I care to listen to it and notice no distortion.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
THE BEST SPEAKERS
Size: Pair, Size: Pair
These speakers are the best sounding bookshelf speakers i ever saw or heard. The sound from them is clear even from a cheap crosley suitcase record player and the bass is just awesome because you can actually hear it and it ties my songs together when i can actually hear the baseline. They work extremely well independent of a separate subwoofer because the bass is very strong!
Another point of praise is that the decibel count is very high at 93 which means on very low power they perform loudly. Even on low volume from my Aiyima A07 Premium amplifier, they can be heard throughout my house.
They look so cool and appear to be very high quality build and strength. They can be used for whatever you want (provided your amp is compliant) they're super easy to set up because all you do you just attach the sticky rubber feet on the bottoms and the grilles are magnetic for whatever aesthetics youre going for. Definitely worth the money (i bought them on sale for $230) very top notch speakers!
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Very good speakers
Size: Pair
The r51ms are used to compliment my klipsch rp500m speakers and a 12 inch subwoofer in a large living room. By placing the r51m speakers to the outside walls , and the rp500m speakers to the interior, closer to the amplifier, and with the subwoofer set on deep bass only at just enough volume to barely compliment the sound, the large living room is more than sufficiently covered with at least true high fi quality sound, if not true budget audiophile sound. My entire 2.1 system is all klipsch. That's how I want it.
I am using them with a high powered tube amplifier, so presence and clarity is awesome. Placement is critical. I was initially disappointed until I switched the r51ms to the spread to the outside walls position, and the rp500ms to the interior, closer to the amplifier. The difference was remarkable. The 2 different klipsch speakers, ie one a rp and the other a r series blend together perfectly with no clash whatsoever because of somewhat more refined sound on the rp500m speakers. The rp500m speakers do sound higher end , but they are supposed to, but with the speakers as outer r51m and inner rp500m, and the klipsch subwoofer at deep bass with just a touch of volume the result is sound of such quality that I can honestly say I can be content and satisfied with it. I can say my system is complete, and no further improvement, upgrades are needed. Tower speakers as primaries are not necessary because of the high quality of sound and the high sensitivity of the 4 klipsch bookshelf speakers and klipsch subwoofer. This saves me money during this rapid inflation period of time. I could easily say that what I have sounds more than good enough to be satisfied and content with without any desire to upgrade further at this point.
Shipping speed was excellent via Amazon itself, and the box and speakers arrived in handled with care and new condition.
I am not disappointed at all now that the r51m speakers are the outside speakers, spread apart from corner wall to wall to compliment the interior placements of my rp500m speakers by klipsch. Im all klipsch here and I love it. 5 stars categorically. As previously stated, I see no need for primary tower speakers, even in a large living room, and that equals high quality sound and savings of money at the same time. I recommend these speakers. They do more than just do sound quality wise.
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Reviewed in the United States on August 22, 2025
★★★★★ 5
Awesome speakers.
Size: Pair
Love Klipsh speakers. Beautiful, full, rich, clear sound. Combine with a sub for best sound. Very loud. Love these.
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Reviewed in the United States on April 30, 2026