Nozzle mesh screens sometimes look like a decorative piece or something just to keep the ear juice out. They can create problems though when they wick up too much moisture or modders decide to remove them completely. Below you can see up close images of various nozzle mesh screens serving a vital function – to dampen unwanted resonances. The screen openings themselves (number of holes + diameter of holes) can also factor into the tuning of the earphone, but this was not included as part of this investigation. Below are samples of certain earphones where nozzle screens were discussed in more than passing on certain forums, as well as a popular modder tool otherwise known by the name of micropore tape or paper tape.

KZ ZS3

It was quite the rage to remove these screens and I see why. Mine was actually two plastic screens stuck together. Was this a mistake or on purpose?

SONY MH755

Reviewed here. Modders like to remove the foam plug, but do not remove the black mesh screen. It tames the peaks at 2.8kHz and 5.3khz giving it almost a textbook Harman curve. Very much important noted by certain modders like Slater.

BQEYZ SPRING 1

Our takes on the Spring 1 here. Modders claimed by removing the screen it would get rid of the woolly bass. I removed mine and the quality of the bass did not change, but treble peaks were turned up giving the illusion of improved bass. The bass was just masked by the extra treble punch. Again, I do not recommend removing unless there wasn’t enough upper midrange in the stock tuning. I have heard that other BQEYZ models employ tuning filters directly on the BA units, so this might explain why the screen only has a minor impact.

MOONDROP KANAS PRO

We covered the KPE exhaustively here. Notorious for clogging with moisture in high humidity areas or sweaty ears, Moondrop eventually started selling replacement nozzle screens and included them in subsequent models like the Starfield. They have an interesting arrangement of a small rectangular area with extra damping coverage. Similar to using a partial piece of micropore tape. Again removing it introduces peakiness. Not recommended.

MICROPORE TAPE (3M NEXCARE PAPER TAPE)

Micropore tape has a very irregular pattern. Not much to say about it other than it doesn’t seem to target any specific frequency. All the other filters are uniform and tend to dampen certain frequencies. Useful as a butter knife, not a scalpel.

SUMMARY

So personally, I do not recommend removing nozzle mesh screens unless planning to replace or mod with something else. There might be exceptions such as pure balanced armature IEM’s that utilize resistance damper filter plugs on the end of the balanced armature itself. Therefore the nozzle screen is not like putting a screen door on a submarine, most appear to be used as resistive dampers to tame the frequency response. I’m not suggesting it is wrong to remove the filters, but be aware of the consequences. If there are other earphone modding materials you would like to see up close and personal, leave a comment below or feel free to get in touch with us and we will see what we can do to expand this article.

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DISCLAIMER

Sometimes I stare blankly at walls.

Our generic standard disclaimer.

About my measurements.

You find an INDEX of our most relevant technical articles HERE.

The post Nozzle Screen Filter Impact on Frequency Response appeared first on Audio Reviews.

In May 2019 I came up with an idea that I had never seen anywhere before. It involved turning a KZ Starline silicone eartip inside out, in what I dubbed the “Flip Tip”. The process is very easy, and (other than a pair of Starline eartips) only involves a few tools you have around the house.

TOOLS NEEDED

To perform this mod, simply get something with a round shaft that goes through the core of the eartip, but also has a large head on it. I’ve had success using a screw, a nail, and a golf tee.

THE PROCESS

Here, the process is demonstrated using a screw:

1. Insert the screw through the bottom of the Starline eartip.

2. Now pull down on the screw, which pulls the center of the eartip core inside out.

3. Once the core is inside out, you want to pull the eartip skirt down around the eartip core, like the top of an unbrella. You can do it with your fingers, or using something like the screwdriver shown in the next photo.

4. The surface of the ‘flipped tip’ is made of a stickier silicone than the normal surface of the eartip. This alllows the eartip to grip the skin of your ear better, but it also attracts dust. Simply clean the dust off using a small amount of isopropyl alcohol and a lint free cloth (such as micro fiber).

RESULT

This is what the ready inverted eartip looks like. Pull it carefully off the screwdriver’s head…and bingo!

When the 2 ear tips are placed side by side, you can see that the flip tip is different in 3 ways:

A. The center core of the flip tip is longer than the stock Starline tip. This is particularly useful to use on earphones that have short or stubby nozzles.
B. The flip tip has a wider bore at the top, like the bell of a horn. This will allow the flip tip to sound different than the normal Starline tip.
C. The flip tip has a slightly wider profile, allowing a more secure fit in some ears vs the stock Starline tips.

The final shape reminds me of the shape of Comply foam tips. And the soft and sticky silicone feels very similar to Sony Hybrid tips.

The flip tips are very comfortable to wear. They seal well and the stickier silicone material grips the ear and stays in place. I also found that the flip tips do not need to be inserted as deeply as a regular Starline tips to get the same tight seal. Because of this, the flip tips should increase the maximum time you can comfortably wear your earphones.

Of course, depending on individual ear shape and size, YMMV.

FURTHER READING

Tweaking Tips – A Simplified Guide To IEM Silicone Eartips by KopiOkaya (2020-03-24)

The Iconic AZLA SednaEarfit Silicon Tips – Is Their Price Justified? by Jürgen Kraus (2019-12-22)

Announcing The Premium Eartips Project by Jürgen Kraus (2019-10-01)

You find an INDEX of our most relevant technical articles HERE.

The post The Flip Tip: Creating Big Widebore Tips From Reversing Starlines appeared first on Audio Reviews.