[killaHz]

I've been reading a little about IEMs lately, and I'm confused by how people use the term 'coherence.' It seems like it could refer to a few different things:

1. Coherence of the phase of the electrical signals reaching the different IEM drivers
2. Coherence of the phase of the sound waves in the music reaching the ears
3. Coherence of the overall sound signature (is it well integrated?)

The glossary is no help here.

 

[HAMS]

I dont know. Sound like another audiophile's fancy word they use loosely. Maybe its about the overall signature with no weird of extreme peaks or dips.

 

[redrol]

Basically the different drivers in an IEM need to crossover properly to produce coherent sound. Also the phase of each driver as it hits the eardrum matters. This is why something like the Sony EX1000 with a single dynamic driver is more coherent than a heck of a lot of many-BA sets. It takes a lot of skill and engineering to crossover say, 8BAs and have that sound hit the eardrum in perfect phase and also crossover properly to not have EQ dips and such. Its a damn miracle actually, lol.

 

[Kitechaser]

None of the multi driver IEMs are coherent. It is physically impossible, so the word is thrown around very very loosely. (Hybrids are the worst)
If you are worried about coherency, or your ear is partial to that sound, single driver is the only place to go.

 

[redrol]

None of the multi driver IEMs are coherent. It is physically impossible, so the word is thrown around very very loosely. (Hybrids are the worst)
If you are worried about coherency, or your ear is partial to that sound, single driver is the only place to go.

Why make such an absolute statement? Of course it is possible, just very hard.

 

[Kitechaser]

Why make such an absolute statement? Of course it is possible, just very hard.

Because it is true. It is physically impossible to make 2, 3, 4, 5 drivers sound like one. (Basic science)
Hybrids are even worse off, they have a problem with timbre, where the lower frequencies of the DD, sound completely different than the BA part of the sound.

 

[redrol]

I cant even remember posting in this thread but you are entirely wrong. Have a nice day.