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Description
Revox INV 40 Architectural SpeakerSounding walls through invisible speakers! The innovative surface loudspeakers of the Invisible series are only a few millimetres thick and are installed completely invisibly under plaster, paint or wallpaper, turning the wall or ceiling into a hidden sound source. The amazing listening experience: Due to the special flat radiation characteristic of the Invisible Soundboards, their impressive, harmonious sound is equally audible everywhere in the room
Sounding walls through invisible speakers! The innovative surface loudspeakers of the Invisible series are only a few millimetres thick and are installed completely invisibly under plaster, paint or wallpaper, turning the wall or ceiling into a hidden sound source. The amazing listening experience: Due to the special flat radiation characteristic of the Invisible Soundboards, their impressive, harmonious sound is equally audible everywhere in the room – regardless of the listener’s position.
The INV 40 is a compact-size surface loudspeakers installed invisibly under plaster, paint or wallpaper. With special polymer membrane for integration in dry construction, solid construction, walls and ceilings as well as in specific applications. Due to the very small dimensions, the Invisible Speaker fits even with limited specifications.
| INV 40 aqua slim | INV 40 wood slim | INV 40 stereo | INV 40 stereo carbon | INV 40 | INV 40 carbon | INV 40 PE | |
|---|---|---|---|---|---|---|---|
| Width (mm) | 300 | 300 | 410 | 410 | 410 | 410 | 410 |
| Height (mm) | 400 | 400 | 625 | 625 | 625 | 625 | 625 |
| Installation Depth (mm) | 33 | 33 | 52 | 52 | 52 | 52 | 52 |
| Weight (kg) | 0.6 | 0.6 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Music power handlingcapacity (Watt) | 40 | 40 | 2 x 20 | 2 x 20 | 40 | 40 | 40 |
| Impedance (Ohm) | 4 | 4 | 2 x 8 | 2 x 8 | 4 | 4 | 4 |
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Exchange/Return Notes
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4.1 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Deliverence 101
Format: Paperback
Great book to understand deliverance and what demons are and how to get rid of them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 1, 2026
★★★★★ 5
Divinely Inspired
Format: Paperback
Yet another divinely inspired book from Praying Medic!!! Dave has a unique writing style of choosing his words, not to impress, but to be very readable, engaging, and most informative. This book (and others that I have read of his) leave the reader feeling informed on the topics and with a profound sense that Dave truly cares about our awareness of and safety from the perils of the spiritual battles we face. My takeaways are several relevant insights to issues and demons my own family is encountering and solid suggestions for dealing with them head-on. For someone seeking a primer (short yet meaningful chapters) on the evils that exist all around us, I strongly recommend reading what Praying Medic has presented here.
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Reviewed in the United States on February 1, 2026
★★★★★ 5
I must read
Format: Paperback
I haven’t seen one of Praying Medic books that I haven’t liked. This one did not disappoint!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
I recommedn all of Dave's books. Easy to read.
Format: Paperback
Another book by Dave. Easy to read and understand. I recommend.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Great gift and lovely way to weave God's presence into daily life
Love these prayers. I heard about the book from a podcast of Steve Cuss (or maybe Curtis Chang?). This book is a lovely and sometimes humorous way to weave God into the day. (My favorite-- a prayer for changing diapers! I sent this to my daughter in law).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
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