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Glass vs plexiglass for pipe chamber

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  • Glass vs plexiglass for pipe chamber

    I am building a see through wall between my pipe Chamber and my console. I am considering both glass and plexiglass. I know that glass will attenuate more sound than plexiglass for the same thickness but is there something about the spectral transmission characteristics that makes one of them preferred? Thanks, Mark

  • #2
    Depending on the size of your opening, the Plexiglass would flex a lot more with the lower frequencies of pedal notes. Glass is a lot more rigid. If your opening is large, that flexing could be substantial and distracting to observers, including the organist. Use of trems could also create that flexing, especially if your tremulant box is in the chamber.
    Larry is my name; Allen is an organ brand. Allen RMWTHEA.3 with RMI Electra-Piano; Allen 423-C+Gyro; Britson Opus OEM38; Saville Series IV Opus 209; Steinway AR Duo-Art, Mills Violano Virtuoso with MIDI; Hammond 9812H with roll player; Gulbransen Rialto; Roland E-200; Mason&Hamlin AR Ampico piano, Allen ADC-5300-D with MIDI.

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    • #3
      Mr. Weber,

      Welcome to the Forum! I hope you continue to participate here for a time to come.

      IIRC, glass is actually a plasma/liquid. Therefore, I think it would logically follow that vibrations from the pipe could cause the glass to change shape over time more than plexiglass.

      I visited the Organ Stop Pizza place in Phoenix, and while I'm not sure what type of glass enclosure they have, it suits the purpose well. Admin should know the answer to that one.

      Michael
      Way too many organs to list, but I do have 5 Allens:
      • MOS-2 Model 505-B / ADC-4300-DK / ADC-5400 / ADC-6000 (Symphony) / ADC-8000DKC
      • Lowrey Heritage (DSO-1)
      • 9 Pump Organs, 1 Pipe Organ & 6 Pianos

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      • ShadyJoe
        ShadyJoe commented
        Editing a comment
        Glass is a solid, not a liquid. When heated to extreme temperatures it turns to a liquid.

        Plasma is a gas made from ions, a state that is not solid, liquid, or gas.

        Some think that since some old glass windows are thicker at the bottom than at the top that it has over time flowed from top to the bottom. The glass was made this way.

    • #4
      When I was in college, one of my dorm rooms was across the road from another building with large glass windows on the order of 8 ft square facing my room. I was amazed about how much the glass flexed with passing vehicles.

      For durability alone, I would choose glass. There will always be some need to clean whichever material you choose, and plexiglass will easily scratch from repeated cleanings. I would also (whichever material you choose) use relatively small panes mounted in a wooden lattice. That way if a portion of it needs replacement, you don't have to replace the full area.

      Note that a "pizza 'n pipes" I frequented for organ consoles used large glass panes so the pipe chambers were visible.

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