[DR650SE]

Hey guys, hoping I can get some help with an issue. I have Westone W40 IEMs, and my left IEM cracked open and when it did, one of the wires broke from the solder joint. So now I've replaced the wires with 30AWG enameled copper wire. However, in testing it sounds different then the right side. It almost sounds like I'm not getting sound from the high end balanced armatures. I've attached a pic of how it's soldered up right now, and hoping someone can spot an obvious flaw in my repair. Any guidance would be great. These are 5+ years old, and I'd perfer not to pay for a new set. The only wires I've messed with are the enameled copper wires. I haven't touched (at least intentionally) any other solder joints. Both IEMs are measuring 15Ω so I'm stumped as I don't have much knowledge in this arena.

 

[Bassiklee]

Did you somehow manage to create a solder bridge across the input to that first cap? Looks like maybe that solder is touching the case, which your other wire appears to be touching on the LF driver. That looks like a variant of the GV, essentially a dual vented LF, like a HODVTEC coupled with a TWFK, except with their own caps, rather than the super tiny ones incorporated into the GV

 

[DR650SE]

Did you somehow manage to create a solder bridge across the input to that first cap? Looks like maybe that solder is touching the case, which your other wire appears to be touching on the LF driver. That looks like a variant of the GV, essentially a dual vented LF, like a HODVTEC coupled with a TWFK, except with their own caps, rather than the super tiny ones incorporated into the GV

Hmmm, I'll need to take a second look. I didn't touch (I think) any of the caps. I only touched the joints where the MMCX connector wires touch the BAs. I'll maybe try and clean the solder off with some wick and try again. Are they ll wired together? It look like that to me. I wanna make sure I know how the signal goes before I mess it up.

 

[Bassiklee]

It's unclear what exactly you replaced. If you only replaced the wires going from the MMCX to the LF driver, then ignore my comment. Since all four wires appear to be the same, I thought you replaced them all. Is that LF driver sealed like a DTEC/HODTEC, or vented like a HODVTEC? The smaller driver is clearky a TWFK variant

 

[Bassiklee]

*clearly.

 

[Farquarl]

*clearly.

Clearky does have a nice ring to it tho

 

[Bassiklee]

I'm saving that one for the marketing blurb on my color free shells. "light passes clearky thru them"…

 

[jameswalker]

Just something interesting here. Comparing 2 PCs side by side using the same measurement setup, same IEM, etc:

 

[LeaveMasonAlone]

Just something interesting here. Comparing 2 PCs side by side using the same measurement setup, same IEM, etc:

Did you calibrate REW for each sound card?

 

[jameswalker]

I sure did. Both plots are without smoothing, too.

To be honest, the soundcard calibration in my 2 cases is largely irrelevant. Talking 0.2db at the very most out.

 

[HenacanPodwell]

Hello everyone! After digging somemore info deep into the threads, I have a few things that I am still confused and would be really happy if anyone can teach me.

How does one calculate and create a resonator? It is by trials and errors? The resonator on RAB P looks fantastic! Also does resonator changes the frequency responses that iec 711 can measures?

What does the center tap do on ba drivers?

What would happen if you swap the polarity of the driver? Is it a good practise and how does it changes the sound?

What can I do to improve soundstage? Some multi ba iem sounded huge to me.

Thank you very much!

 

[musmecca]

Hello everyone! After digging somemore info deep into the threads, I have a few things that I am still confused and would be really happy if anyone can teach me.

How does one calculate and create a resonator? It is by trials and errors? The resonator on RAB P looks fantastic! Also does resonator changes the frequency responses that iec 711 can measures?

What does the center tap do on ba drivers?

What would happen if you swap the polarity of the driver? Is it a good practise and how does it changes the sound?

What can I do to improve soundstage? Some multi ba iem sounded huge to me.

Thank you very much!

Most of what you seek is in here....it is a synopsis of the first years of this thread and covers all the topics you asked above with the exception of resonators: dhruv is the genius on resonators, so I'd check with him.

https://docs.google.com/document/d/...Jh_bh3fuUBNe2HrQg/edit#heading=h.t2frpipmdu4k

 

[jameswalker]

Why has the Harman target curve changed year to year? Which curve are people using to strive toward with crossover design simulations?

 

[Bassiklee]

So, game changer new TWFK seems to be out. Prewired, with cap, and a much better response than the 30017. No affiliation. I do have some coming in for evaluation.

 

[musmecca]

So, game changer new TWFK seems to be out. Prewired, with cap, and a much better response than the 30017. No affiliation. I do have some coming in for evaluation.

Really curious as to what cap value they selected.....