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  1. Alfredo02

    Is Dolby Atmos the Future of Music or a Complicated Fad?

    I fully agree with the video. Dolby ATMOS is a fine technology. But he doesn't mention the need to rewire the house, while technically it is already solved according to the stringent requirements that ATMOS places in the wireless transmitters, to move objects along speakers in astonishing...
  2. Alfredo02

    Is Dolby Atmos the Future of Music or a Complicated Fad?

    Well, I do not know if I could call mainstream a system that requires to rewire the whole House. Certainly my budget dost not allow to lay down new cables along the different walls every time a new technology pops up, having to paint every time half of the house. I certainly believe it is...
  3. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    If. You allow me, I will create a different thread with the previous post since the theme has evolved and now it doesn't have too much in common with the title of this thread. It is not so much about DIY but about the interest we may have in a couple of new speaker technologies and their...
  4. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    Trying to understand the overall situation I have just found that two years ago SONOS has paid 100m$ in cash to acquire Mayth technologies. Surprisingly enough is a new way to move two cones, displacing them in opposite direction, a somewhat similar principle whale been talking here, but with a...
  5. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    Now it make sense to me the use of the external air pump, listening to the reviews: - When the speaker is unpowered, the driver has a rear offset due to the magnetic neutral suspension (MNS) forces of the R.A.D. system. The internal air pump generates pressure to center the driver from its...
  6. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    I've seen Andrew Jones explanations about the Mofi 888, and it explains with exemplar simplicity the principle of the double magnet, and certainly has a strong similarity with Brane Audio solution, maintaing a long coil and a small gap, having two magnets with opposed polarity in order to cancel...
  7. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    Point is that expert reviews classify the two brands as best in class regarding bass extension, both using limited power 50 or 60 watts and both having as said before much better bass extension than competitors. Curiously both at similar price, around 450 eur. This is why Amir review...
  8. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    Or, couldn't it just be that novel Class D amplifiers provide the power needed to ample counteract the air inside a closed cabinet, at a real low cost, and therefore avoiding the need of a large volume enclosure? Two TPA3255s would provide more than 1200watts, being the main cost the power...
  9. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    The problem l have understanding this patent it is that in the background {010} explains very clearly the problem of all speakers that need force to move the cone to counteract the existing air pressure in a closed enclosure. But a continuation in the first paragraph, under Summary of the...
  10. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    Sorry guys, but I had assumed than the replication of the opposing force principle of dual confronting speakers via magnetic forces with the so called Magnetic Negative Springs were more common field in the industry. Sorry I did not provide any introduction about the technology, nor mentioned...
  11. Alfredo02

    "Breaking Speakers' Hoffman iron law"¹: Dual Force Cancellation Subwoofers Vs Magnetic Negative Springs.

    I am continuing with my research on how to achieve a cost effective way to create a DIY subwoofer. After the achieved effectiveness of Sonos and their Dual Force Cancellation Subwoofers, it made very difficult to achieve a cost effective way to DIY subwoofer. However, I have found that...
  12. Alfredo02

    Sonos approach to subwoofer

    Thanks for your response Point is that Sonos launching last yéar their mini Subwoofer for 350 euros, it makes almost impossible to do a competitive DIY project in dual opposed subwoofers, since they have risen significantly the bar, particularly in pricing. Several issues should be addressed...
  13. Alfredo02

    Speakers deconstructed

  14. Alfredo02

    Sonos approach to subwoofer

    I was enticed to build a dual opposed subwoofer, with two SB Acoustic 8" SB23MFCL45-8 , at a 150 eur each, and a Hypex Fusion plate 251, since it can take up to 2,2 ohm impedance output, at 350 eur. Dual speakers I knew (Rhythmic G25HP, PSA S3010, S3611, Paradigm sub,...) have much higher...
  15. Alfredo02

    Wireless ATMOS: WISA. FLEXCONNECT, ..., are they ready?

    Thank you very much for kind answer. We may need to recognize that it is to early and best will be to wait for companies Iike miniEDS to make a move. It is sad to see how technologies that are ready to fit a real and existing need in the market, users can not take advantage of them due to...
  16. Alfredo02

    Wireless ATMOS: WISA. FLEXCONNECT, ..., are they ready?

    MiniDSP has announced it's Flex product line will have WISA capability "soon". Has not given a date, but it is encouraging.
  17. Alfredo02

    Wireless ATMOS: WISA. FLEXCONNECT, ..., are they ready?

    Maybe that's another option. Thanks . Platin announces their own transmitter, but it is nothing more than a rebranded WISA SoundSend, since WISA sells it's transmitter B2B as a white label. This all started since I wanted to use my existing set of active speakers. Maybe it is the right...
  18. Alfredo02

    Wireless ATMOS: WISA. FLEXCONNECT, ..., are they ready?

    Hi All, I'm building at home a wireless Atmos sound theater. And looks to me that it is still closer to sci-fi than to reality. When analyzing wireless transmitter technologies, soon most of the common ones disqualify due to lower latency, bit rates or many other requirements, since they need...
  19. Alfredo02

    What is generally the best material for speaker cones with the least compromise and most benefits?

    I think it is interesting the approach SB Acoustics is following in their mid range cone drivers product line. Aside from the Satori line, It looks their strategy is to use the same motor and overall structure, just changing the cone material on their product families: NRX: paper fibers...
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