[Xymordos]

I...don't have enough knowledge to answer that question I feel like it's a good investment...

 

[CMOS1138]

Recently, after buffing down my quad IEM in an attempt to achieve better comfort, I though I had somehow managed to kill the DTEC driver because all the base disappeared. Turned out that I had removed just a few to many mm from the end of the tube and it totally changed the sound signature. I was able to resolve the problem by attaching a small bit of tubing to the end of the DTEC's sound port and the thump returned to my music. 

 

[vector1]

Just asking, but has anyone managed to reproduce a decent 20Hz sine wave on IEMs? For all my tuning, I can only get a relatively flat response to 50Hz, and then rolling off to about 25-30 Hz before I lose all response.

 

[piotrus-g]

  Just asking, but has anyone managed to reproduce a decent 20Hz sine wave on IEMs? For all my tuning, I can only get a relatively flat response to 50Hz, and then rolling off to about 25-30 Hz before I lose all response.

Yes, but it depends on drivers - some drivers roll off some don't. Typically non-vented roll-off.

 

[MIke M]

Could also be related to your test equipment and/or method of coupling to the mic, I rarley see a complete dropoff, even with non vented drivers.

 

[vector1]

Maybe my ears just aren't sensitive to 20Hz... I'm using a HODVTEC so I'd expect reasonable amounts of sub bass.

 

[Xymordos]

HODVTEC has quite good sub bass! I feel that it sounds better than the CI! Not sure how to improve the roll off though. Usually I see 10-20db roll off from 50 to 20Hz?

 

[MIke M]

I'd say there's a sound leak somewhere, either from the tube to the receiver, the tube to the mold or the mold to the mic

 

[piotrus-g]

  Maybe my ears just aren't sensitive to 20Hz... I'm using a HODVTEC so I'd expect reasonable amounts of sub bass.

Are you measuring it on open shell or bare drivers? I measured HODVTEC yesterday and while bare driver measured quite poorly it improved dramatically when I put my fingers near the vents almost closing them, bass improved and response was really good.
It's because HODVTEC having 4 quite large vents makes it seem as if the sound was leaking out.

 

[Xymordos]

The HODVTEC measured like CI even with the vents open for me o.O
 
How did you think they sounded? Was it CI or the HODVTEC for you, as a personal preference?

 

[piotrus-g]

  The HODVTEC measured like CI even with the vents open for me o.O
 
How did you think they sounded? Was it CI or the HODVTEC for you, as a personal preference?

I didn't listen to it but if I was to pick ultimate woofer it would be 38DJP007Mi/8a - this is one is unbeatable right now. From what I know no other woofer performs like this

 

[MuZo2]

I didn't listen to it but if I was to pick ultimate woofer it would be 38DJP007Mi/8a - this is one is unbeatable right now. From what I know no other woofer performs like this

Dynamic drivers?

 

[MIke M]

sonion's vented 3800

 

[piotrus-g]

sonion's vented 3800

There is no non-vented 3800
@muzo2 - as described it's Sonion 38DJP007Mi/8a
You can find this woofer in Roxanne, but Roxanne has two of those in each earpiece

 

[MIke M]

Come on now, give it to me, it's still sonions vented 3800, lol