I got an even easier mod for you guys. It’s more precise, more consistent, and cleaner than just stuffing the nozzle with cotton.
The downsides to cotton are 1. it’s inconsistent to get a proper density and fill. And 2. small cotton dust and fibers become detached and fall onto the driver diaphragm. These downsides are not desirable at all.
This mod is made especially for the Blon owners that tried the nozzle mesh mod and feel the treble is a little too much. Or those that were afraid to try the nozzle mesh mod for fear that the treble might be too much.
There’s a guy on another popular audio board (which I cannot link to or specifically mention on HeadFi because that site is banned from discussion here). Anyways, this guy modded his JVC HA-FD01 (a carbon nanotube dynamic earphone) by rolling up an alcohol pad and inserting it into the JVC nozzle. This allowed the treble peaks to be tamed while not causing loss of detail. It’s like the best of both worlds; like having your cake and eating it too.
The resulting mod was extremely effective. So effective that a modded pair was sent to engineers at JVC in Japan for evaluation. JVC was so impressed with the mod that they actually created a whole new version of the HA-FD01 based around the modded filter. It was sold through Massdrop as the HA-FDX1.
I tried the same mod to the Blon, and all I can say is it’s basically Blon perfection.
To do the mod, you still need to remove the stock hybrid ‘sandwich’ nozzle screens, and obtain the $0.10 replacement plain stainless nozzle screens.
That is outlined here:
https://www.head-fi.org/threads/blo...ressions-thread.916702/page-182#post-15531900
And yes, the proper size of nozzle mesh is listed at that link, as well as where/how to buy them.
Next you need to obtain a
2-ply alcohol wipe. The kind that you rub on your skin before an injection is given.
You cannot use the 1-ply type, as they are way too thick. The 2-ply pads are basically a 3”X1.5” rectangle that is folded in half to make a 1.5”X1.5” square from the factory.
You can buy them anywhere and everywhere. Even get one for free from a Dr office, hospital, or health clinic. Or ask any diabetic, nurse, doctor, pharmacist, or paramedic. They will give you one for free, trust me. But you must open the wipe up and inspect it to make sure it’s the 2-ply type that can be unfolded.
Let me repeat that:
Get. The. 2-ply. Type. Only.
If you can only one the thick fuzzy 1-ply type, then keep looking until you the 2-ply type.
Once you have your 2-ply alcohol pad, all you do is remove it from the package, unfold the wipe, and let it air dry on a table for a few hours. Then it’s all ready to use.
Next you take sharp scissors and cut the dried alcohol pad into a 4mmx12mm rectangle. Like this:
The size must be precise. You can play with the length some. Just don’t go longer than 18mm or you will dampen too much treble. And don’t go shorter than 12mm or it won’t really do anything noticeable.
Next, carefully roll up the filter, like this:
Then insert it down into the nozzle with sharp tweezers. It will ‘spring’ open and fill up the nozzle. Once inserted, it should look like this:
Here’s a closer shot.
Also, you don’t want to jam the alcohol filter down as far as it will go inside the nozzle. You want to insert it so it’s juuuust barely under the stainless nozzle mesh (once the stainless mesh is reinstalled). Look for a little shelf flange section that’s machined into the inside of nozzle; that’s what the stainless screen will sit on. You want the alcohol filter to be just barely below that little shelf flange part.
Also note that the center of the nozzle is not blocked in any way by the alcohol pad roll. All the rolled up alcohol pad filter did was make a more narrow opening, where the inside circumference of the nozzle is lined with the alcohol pad filter. The bulk of the sound from the driver is still free to come up through the hole in the center of the alcohol pad filter.
Finally, you install the new stainless nozzle mesh you obtained earlier.
And that’s all there is to it!
Enjoy.