There’s already a couple threads on the new DFL, but I thought I’d start a new one so as not to hi-jack the existing ones…
So here’s some feedback on the DFL vs the Huma40. The DonnyFL Yokozuna is out of the box stock. The Huma40 has the “Avalanche” inserts, but they aren’t stock. They have some “finger cots” and pellet packing material in the baffles. Both moderators were made for .30 pellets.
I guess for “real testing”, I would’ve made a whole bunch of shots and then averaged the sound levels. I didn’t feel like wasting the air or the pellets so the screen shots represent single shots.
Two airguns were used. The first was a 40fpe .22 20” CZ and the second was a 80fpe .30 24” LW. The same moderator configuration was use for both airguns..swap the mod or add the DFL adapter and go.
The “testing” was with two different iPhone apps, “Decibel Meter dB sound detector” and “Sound Level”. While they might not be capable of exact dB measurements, they do offer a like for like comparison.
The iPhone was placed on the grass and the moderator was held 18” away and off to one side.
To my ears, the Huma was more mellow and the DFL had a hard to describe metallic sound. The Decibel Meter dB app shows graphs with a double spike for the DFL Yokosuna. This same pattern existed in both the .22 and .30.
Here’s the .22 screen grabs..for DFL Yokosuna
Here’s the .22 screen grabs..for Huma40
Here are the .30 grabs..for DFL Yokosuna
And the .30 grabs..for Huma40
I was curious about the metallic DFL sound, so I unscrewed all the sections to do a quick exam. I could tell there was a difference in the way the moderator re-assembled. The “normal” feel when screwing the sections together was a bit of o-ring drag on the threads just as the section started to snug down. When screwing a small section into the larger, empty, “blast section”, there was no drag feeling..just metal to metal contact when snugged down. Hmmm. Wonder if this is the source of the double spike?
Notice the difference in the larger DFL section??..see the red arrow..
I’m pretty sure the area without the threads doesn’t allow the o-ring to contact anything when a small section is screwed into the blast section. Maybe this creates a micro-reverb chamber..IDK Not sure if this is supposed to be normal. Does anyone else have a Yokozuna or Ryu they could disassemble to check? I’d be curious to see if there’s a difference between what I have and what others have.
Just for grins, I took the blast section out and made another shot..just to test my theory..
Screen grab for DFL..without “blast section”
Double spike is still there but spike number two is greatly reduced and, to my ears, sounds a lot more like the Huma. If you believe the app, actually a little quieter, too.
So here’s some feedback on the DFL vs the Huma40. The DonnyFL Yokozuna is out of the box stock. The Huma40 has the “Avalanche” inserts, but they aren’t stock. They have some “finger cots” and pellet packing material in the baffles. Both moderators were made for .30 pellets.
I guess for “real testing”, I would’ve made a whole bunch of shots and then averaged the sound levels. I didn’t feel like wasting the air or the pellets so the screen shots represent single shots.
Two airguns were used. The first was a 40fpe .22 20” CZ and the second was a 80fpe .30 24” LW. The same moderator configuration was use for both airguns..swap the mod or add the DFL adapter and go.
The “testing” was with two different iPhone apps, “Decibel Meter dB sound detector” and “Sound Level”. While they might not be capable of exact dB measurements, they do offer a like for like comparison.
The iPhone was placed on the grass and the moderator was held 18” away and off to one side.
To my ears, the Huma was more mellow and the DFL had a hard to describe metallic sound. The Decibel Meter dB app shows graphs with a double spike for the DFL Yokosuna. This same pattern existed in both the .22 and .30.
Here’s the .22 screen grabs..for DFL Yokosuna
Here’s the .22 screen grabs..for Huma40
Here are the .30 grabs..for DFL Yokosuna
And the .30 grabs..for Huma40
I was curious about the metallic DFL sound, so I unscrewed all the sections to do a quick exam. I could tell there was a difference in the way the moderator re-assembled. The “normal” feel when screwing the sections together was a bit of o-ring drag on the threads just as the section started to snug down. When screwing a small section into the larger, empty, “blast section”, there was no drag feeling..just metal to metal contact when snugged down. Hmmm. Wonder if this is the source of the double spike?
Notice the difference in the larger DFL section??..see the red arrow..
I’m pretty sure the area without the threads doesn’t allow the o-ring to contact anything when a small section is screwed into the blast section. Maybe this creates a micro-reverb chamber..IDK Not sure if this is supposed to be normal. Does anyone else have a Yokozuna or Ryu they could disassemble to check? I’d be curious to see if there’s a difference between what I have and what others have.
Just for grins, I took the blast section out and made another shot..just to test my theory..
Screen grab for DFL..without “blast section”
Double spike is still there but spike number two is greatly reduced and, to my ears, sounds a lot more like the Huma. If you believe the app, actually a little quieter, too.
