Originally Posted by rudi0504
I am sorry Anakchan , the reason I put this issue because I like very much fit ear 334
I want only to know why between 5 fit ear has different sound quality .no more or less
Nothing again fit ear , this critic is for better fit ear in the future.
Because I love my fit ear 334 very much , fit ear 334 is the best SQ from all my iem I own.
I know you live in Japan , BY I do not know
I take it back the QC issue for fit ear 334
I hope this case is close in this page and I will keep for my self about this sq different.
And I apologize to all head fier friends if my word not so good because of my limitation in English
I think the issue here is that the sample size is not very big, and that has to do with the nature of the product, being a low quantity, luxury product. If it were a very obvious difference between one batch and another batch, there would be a definite issue, but even 5 samples isn't large enough to really constitute anything that would prompt a change in their QC procedures.
The second is that A/B testing isn't really reliable, even when tested on identical rigs. I don't know how obvious the differences you state are, but they may very well fall within the testing parameters of their QC. I have no idea what the procedure actually is, but I presume that FitEar matches their drivers first, but testing the individual performance of their drivers, and to select drivers that come within their channel matching tolerances, +/- 2 dB or whatever it is they stipulate. They then need to position their drivers around that specialized triple bore nozzle and layer the acrylic down to secure the drivers. This process should be highly repeatable. It's possible some dust gets in between the sound tube and the damper, or the drivers aren't completely secured, but these things aren't likely to happen.
Below are pictures of the FitEar assembly process; you can see some potential issues during the QC process, such as the clay sealing around the coupler and the earphone not being a hermetic seal, or the dust not being completely vacuumed aways by the suction duct during the drilling and finishing process, or the assembly process not going well, but these things are unlikely to happen, and I'm sure the IEMs undergo a final test before being packaged and sent off. It's difficult to say whether this is a QC issue or whether it is just due to natural variances in the performance of the drivers/electrical components, but that fall within tolerances.
Originally Posted by zachchen1996
Sorry, I don't really understand what that means
Couldn't frank just remove the connectors from the stock fitear cable and attatch them to his wires or something? Sorry I don't know much how cables are made.
LOL... no, the connectors don't work that way. The stock FitEar connector is made with what is termed an 'overmold' process, where plastic is injected into a set mold all around the wires and the pins to secure and stabilize the entire thing. Most DIY connectors are already molded, and have outcroppings to allow a user to solder their own wires onto the connectors. This is not possible with the overmold process, unless you preserve a part of the original wire, and solder wire-to-wire, as opposed to pin-to-wire. That's not an ideal way to make a cable, and I don't think (certainly hope not) Frank would make a cable in such a fashion. So, either he takes a ready-made DIY connector, which is currently made only for the Sennheiser HD600/650/25 and not of compact dimensions needed for FitEar IEMs, or he'd have to take measurements of the FitEar overmolding and the pin lengths/diameters and send those dimensions to his injection molding company. That'd mean either one of two things: (1) he'll charge you a lot to prototype and overmold such a connection, much more than normal, or (2) he intends to use these measurements to produce an entire line of cables for FitEar.