Knowles acoustics just launched a new dual driver, the GM-34020. Is it worth looking into? Lets have a look. I got a pair in just recently and below is my summary. First dimensions: in below two images you see from left to right three different two driver modules: a rather old Sonion dual...

If you can communicate with the service supplier, ask them to adhere to the proper post printing procedures (washing and UV curing). If not done correctly this can lead to discoloration, brittleness of the material. Also any unpolymerized resin (the goo that is poured in the printing vat)...

standard SLA resin 3D printing has good accuracy and may be right for the task you described above. When designing your shell based on the scan take the design guidelines into account and ideally get with the service supplier in contact upfront to avoid unecessary iteratitions due to failed...

Hi all, I recently got a sample of Bellsing 260C90021 (short BRC260 hereafter) which are kinda like clones of the well known dual driver module Knowles GQ-30783-000 and I thought it would be interesting to make a direct comprison. I subsequently performed a number of side-by-side tests in...

I am ordering some BAs from Sonion rep in Europe. Anyone interested to hop on? PM me if interested. Costs will be sum of {share of shipment to me, shipment from me to you and the actual price of your order}.

Thanks! I'll try that....

where were the input cables attached on the crossover? Can you provide a better closeup of the crossover?

can anyone advise how to accurately measure a BA driver impedance (circuit setup, measurement instruments etc?)

You have a point there MuZo2, Indeed there is a steep learning curve and investment associated with 3D printing headphones. It took me roughly a year of serious hobby time and quite some money to advance my "home made IEM" project to a 3D printed, ergonomic universal shell, dual BA driver...

Yep. Its been long in the making (the progress bar has been in the upper percentages since a while. Driver implementation though will require some skill given that the required transformer (ca 400V) will have to be accomodated (safely) in the shell along with the driver. Quite a lot of space...

looks pretty cool, but careful, the devils are in the details -> i could not readily find many reviews on this, I would wait on for more experience with this machine. -> max resolution and printing speed may only be applicable under certain circumstance -> small form factor will mean a small...

I have some spare original Estron XT-ESW litz wires (2 cm, pretinned, red) for sale. PM me if interested.

Hi all, I have several IEMs (2 pin termination) and look for a replacement cable with a proper inline microphone. There are a lot of cables around, cheap, not so cheap and ridiculously expensive. I am particularly interested experiences with durable good quality cables and microphones with...

I am planning on painting/ varnishing my IEMs with different colours. Anyone's got a hint which type of colours to use? I am particularly interested in proven skin friendly materials and where to get them. Thanks Philipp

Hi all, I am into my first DIY IEM project using Knowles BA drivers and need to glue shell pieces together. Knowles advises that some glues are not compatible with their drivers since components of outgassing can diffuse into drivers and damage them permanently. My inquiry at Knowles which glues...