Quieting the FX Crown even more

Forums PCP Airguns Quieting the FX Crown even more

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    bzizzi373
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    I was curious if anyone out there has thought about making your Crown even quieter by adding fabric liner to inside of shroud or even more baffles ? The Crown is quiet when shroud is extended but has a pretty good bark when not extended. I don’t want to modify gun to the point of not being stock but would be nice to tame shot report.
    I bet Allen Zasadny could quiet a Crown down. 

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    Brian10956
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    Check with DonnyFL he probably has a way.

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    AWCG
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    Not my gun, not my image. Found this on a Crown group on Facebook. 
    But yes, it does seem that DonnyFL has a moderator that fits the crown. 

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    hollowpoint
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    DonnyFL makes a threaded shroud cap for the Crown. Once you get the threaded shroud cap, you can then pick out any of his cans and screw it onto the Crown.

    FX Crown 1/2 x 20 UNF Adapter

    I don’t know if anyone yet who sells deadening material for use inside factory shroud, but that shouldn’t stop you from being there first!

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    jcjc
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    Speaking of quieting the crown has anybody done that yet with aftermarket suppressors? It would be cool to be able to add a suppressor, not have to extend the shroud, and get the same or better sound reduction. 

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    Crusher
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    Yep. I have a sumo on my Crown from DonnyFL. Works like a champ. And it is about the same length as when the shroud is extended. 

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    bzizzi373
    Participant
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    The stock full length shroud on the Crown is ok but would like to see Huggett make a full length that replaces the factory shroud, don’t need the extend feature, just a good quality 
    nice looking shroud that is super quiet.

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    jcjc
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    thanks Crusher. did your point of impact change with the additional weight and what’s quieter- the suppressor on but shroud not extended, or no suppressor but extended shroud?

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    Saltysteve
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    Donnyfl seems to be the way to go from my past readings. 

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    jcjc
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    ordered a sumo and shroud adapter from donny. i dont have a dB meter but i have an app and i’ll post the results on here.

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    Crusher
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    “jcjc”thanks Crusher. did your point of impact change with the additional weight and what’s quieter- the suppressor on but shroud not extended, or no suppressor but extended shroud?


    I don’t extend the shroud. It is quieter with the Sumo and not extended. So I just leave it that way.
     

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    jcjc
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    received the Sumo from Donnyfl in just a few days-always nice to get items soon after ordering. so this was a very informal test using an iPhone app that measures sound levels in decibels (dB). my crown’s regulator is as it came from the factory and the power level was set at 3 and the rear wheel set at max. I fired 3 shots for each configuration with the phone a few feet away and got an average.
    no suppressor/shroud not extended-106 dB
    no suppressor/ shroud extended-93 dB
    suppressed/shroud not extended-89 dB
    suppressed/shroud extended—88 dB
    the things to remember are that this was a very informal test using an iphone app and likely not the most accurate. however, even if the accuracy isn’t there I’m assuming it is probably measuring consistently so the numbers themselves don’t really matter-it’s the differences between the numbers that matter. also, the decibel scale is not linear, it’s logarithmic.
    my takeaway from this is that Donny’s suppressor clearly works and is a good addition particularly if you’re shooting in a populated area.
    with the suppressor on and with the shroud extended or not, I couldn’t tell a difference in sound level so I’ll leave it on. my hearing isn’t what it used to be after several decades of hunting plus ridiculous amounts of machine gunning in the military. Others will probably be able to tell a difference.

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    Brian10956
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    “jcjc”received the Sumo from Donnyfl in just a few days-always nice to get items soon after ordering. so this was a very informal test using an iPhone app that measures sound levels in decibels (dB). my crown’s regulator is as it came from the factory and the power level was set at 3 and the rear wheel set at max. I fired 3 shots for each configuration with the phone a few feet away and got an average.
    no suppressor/shroud not extended-106 dB
    no suppressor/ shroud extended-93 dB
    suppressed/shroud not extended-89 dB
    suppressed/shroud extended—88 dB
    the things to remember are that this was a very informal test using an iphone app and likely not the most accurate. however, even if the accuracy isn’t there I’m assuming it is probably measuring consistently so the numbers themselves don’t really matter-it’s the differences between the numbers that matter. also, the decibel scale is not linear, it’s logarithmic.
    my takeaway from this is that Donny’s suppressor clearly works and is a good addition particularly if you’re shooting in a populated area.
    with the suppressor on and with the shroud extended or not, I couldn’t tell a difference in sound level so I’ll leave it on. my hearing isn’t what it used to be after several decades of hunting plus ridiculous amounts of machine gunning in the military. Others will probably be able to tell a difference.

    
I know what you mean about Air damage in military. We were never given hearing protection we would take the filters off the Winston’s and use them. Too bad if you smoked Camels.

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    jcjc
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    We were given plenty of earpro. Our Peltors(comms headsets) have some level of protection and many guys wore earplugs in addition to those. We also had custom made ear inserts but all of that can’t overcome miniguns, 240s, and 50 cals all firing at the same time. Plus additional earpro made comms more difficult. I had to get a waiver for high freq hearing loss for the program I wanted before I shipped out to boot camp.

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    jcjc
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    in my “results” post above I meant to say that I’ll leave the shroud not extended and with moderator on. I also didn’t do a test to see if the poi has changed and I’ll try to get that done this week if possible.

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    weatherby
    Participant
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    Custom CF 30/38mm shroud, just slightly longer than the standard shroud in retracted mode.
    It still fits the standard FX case, and it is unbelievably quiet. Very happy with the result. (Although it looks kinda fat…..)

     

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    jcjc
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    Thanks for posting that Weatherby. Where did you obtain that?

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    weatherby
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    Made it myself, the barrel is a LW poly 25cal without choke, but it is 16mm OD so I also had to make a new shroud for it:)

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    18.13
    Participant
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    Has anyone tried extending the shroud farther the shroud stop is adjustable? 

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    jcjc
    Participant
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    “weatherby”Made it myself, the barrel is a LW poly 25cal without choke, but it is 16mm OD so I also had to make a new shroud for it:)

    
impressive work.

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