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FitEar TO GO! & Universal Series --- Suyama's custom IEM, made universal! - Page 117

post #1741 of 4059

If this has been asked and answered already Mea Culpa.  What is the impedance of our beloved FT!334s with the stock cable?

 

 

 

To all my H. F. friends ~ appreciate all the help, advice, and shared passion.

 

 

1000

post #1742 of 4059
Thread Starter 
Quote:
Originally Posted by Saraguie View Post What is the impedance of our beloved FT!334s with the stock cable?

 

Should be between 43-45 ohms

post #1743 of 4059
Quote:
Originally Posted by tomscy2000 View Post

 

Should be between 43-45 ohms

 

Thank you Tom beerchug.gif

 

.......would you know why would the 334 is 2.5 times more than UM Miracles?

Just trying to learn. The spec of IMPEDANCE has suddenly hit me hard as needing to be taken into consideration when making purchasing decisions about gear.

post #1744 of 4059
Thread Starter 
Quote:
Originally Posted by Saraguie View Post .......would you know why would the 334 is 2.5 times more than UM Miracles?

 

Impedance is measured at 1 kHz for most purposes, but it's actually not that important with BA IEMs, you need to look at the entire impedance curve. Traditionally, it was okay to just look at impedance at a single point because dynamic coil driver impedances are usually flat with respect to frequency, but not so with BAs. Because of the crossover circuit implemented and the choice of drivers, the 334 rises to 50-60 ohms in the midrange, but is as low as 15 ohms in the bass and treble. I have no idea what the Miracle's impedance curve looks like. Usually, as a rule of thumb, if you're looking for good damping factor when pairing amps with BA IEMs, choose the amp with the lowest possible output Z; multiple BA IEMs usually can't be counted on to have anything higher than 10 ohms at their lowest point in the impedance curve. Don't have time to explain more. Hope this helps.

post #1745 of 4059
Quote:
Originally Posted by tomscy2000 View Post

 

Impedance is measured at 1 kHz for most purposes, but it's actually not that important with BA IEMs, you need to look at the entire impedance curve. Traditionally, it was okay to just look at impedance at a single point because dynamic coil driver impedances are usually flat with respect to frequency, but not so with BAs. Because of the crossover circuit implemented and the choice of drivers, the 334 rises to 50-60 ohms in the midrange, but is as low as 15 ohms in the bass and treble. I have no idea what the Miracle's impedance curve looks like. Usually, as a rule of thumb, if you're looking for good damping factor when pairing amps with BA IEMs, choose the amp with the lowest possible output Z; multiple BA IEMs usually can't be counted on to have anything higher than 10 ohms at their lowest point in the impedance curve. Don't have time to explain more. Hope this helps.

 

It does plenty......appreciate it!

post #1746 of 4059
Quote:
Originally Posted by tomscy2000 View Post

 

Impedance is measured at 1 kHz for most purposes, but it's actually not that important with BA IEMs, you need to look at the entire impedance curve. Traditionally, it was okay to just look at impedance at a single point because dynamic coil driver impedances are usually flat with respect to frequency, but not so with BAs. Because of the crossover circuit implemented and the choice of drivers, the 334 rises to 50-60 ohms in the midrange, but is as low as 15 ohms in the bass and treble. I have no idea what the Miracle's impedance curve looks like. Usually, as a rule of thumb, if you're looking for good damping factor when pairing amps with BA IEMs, choose the amp with the lowest possible output Z; multiple BA IEMs usually can't be counted on to have anything higher than 10 ohms at their lowest point in the impedance curve. Don't have time to explain more. Hope this helps.

 

XO is one thing, the main problem here is BA drivers are very inductive, hence their unpredictable Z curve (it's not totally a hit-or-miss though, most BA's Z curves have few large peaks in the middle and a big jump towards the end). I might measure the Miracle's Z curve in the next few days. X2 on choosing the lowest output Z source possible. Most renowned example would be the XBA 3/4 (never tried 1/2), the sound changes every time they're plugged in a different source.
post #1747 of 4059
Quote:
Originally Posted by Saraguie View Post

If this has been asked and answered already Mea Culpa.  What is the impedance of our beloved FT!334s with the stock cable?



To all my H. F. friends ~ appreciate all the help, advice, and shared passion.


1000

Happy holidays Sara, and all the rest of you!!
post #1748 of 4059
Quote:
Originally Posted by tranhieu View Post

 

XO is one thing, the main problem here is BA drivers are very inductive, hence their unpredictable Z curve (it's not totally a hit-or-miss though, most BA's Z curves have few large peaks in the middle and a big jump towards the end). I might measure the Miracle's Z curve in the next few days. X2 on choosing the lowest output Z source possible. Most renowned example would be the XBA 3/4 (never tried 1/2), the sound changes every time they're plugged in a different source.

It changes on multi way units as dedicated high frequency drivers may not have the rising impedance untill out of band. TF10 has dropping impedance, for instance.

 

XBA-4 Is a great example of some poor thinking ion the design phase. Xoverless multi driver units will exhibit all the anomolies of the individual drivers plus drop overall impedance at low frequencies from parallel connections. It's close to 6 ohms beow 100hz. The individual drivers needed a much higher initial impedance to begin with to accomplish their design goals.  

post #1749 of 4059
Quote:
Originally Posted by goodvibes View Post

It changes on multi way units as dedicated high frequency drivers may not have the rising impedance untill out of band. TF10 has dropping impedance, for instance.

 

XBA-4 Is a great example of some poor thinking ion the design phase. Xoverless multi driver units will exhibit all the anomolies of the individual drivers plus drop overall impedance at low frequencies from parallel connections. It's close to 6 ohms beow 100hz. The individual drivers needed a much higher initial impedance to begin with to accomplish their design goals.  

I wouldn't call it poor, 'peculiar' is more accurate. The XBA is designed especially for some DAP, not for any DAP. In fact, the best multiway system out there is one that uses no passive component. Those at Sony sure know what they are doing, however their aim might be a bit off here.

 

And I wouldn't worry much about the Z curve of BAs. Of course it'd be best to have a straight line but there are tons of great IEMs out there that have ugly curves since the raise in impedance can be treated acoustically for instance.

post #1750 of 4059
Quote:
Originally Posted by tranhieu View Post

 Most renowned example would be the XBA 3/4 (never tried 1/2), the sound changes every time they're plugged in a different source.

 

Interesting.......I have a pair of 3's coming next weekend. I'll be using them with HP-P1 on the road and then at home with the Audio~gd 11.32.......eager to hear the diff.  


Edited by Saraguie - 12/24/12 at 7:43am
post #1751 of 4059
Quote:
Originally Posted by tranhieu View Post

 

XO is one thing, the main problem here is BA drivers are very inductive, hence their unpredictable Z curve (it's not totally a hit-or-miss though, most BA's Z curves have few large peaks in the middle and a big jump towards the end). I might measure the Miracle's Z curve in the next few days. X2 on choosing the lowest output Z source possible. Most renowned example would be the XBA 3/4 (never tried 1/2), the sound changes every time they're plugged in a different source.

The problem hardly exists with 1,(I skipped 2, but have 1,3,4) but 3,4 changes a lot. Seems that it's been designed to go well with Sony DAPs.

post #1752 of 4059
Quote:
Originally Posted by gnarlsagan View Postdead-neutral iem

Is there such a thing?

post #1753 of 4059
Quote:
Originally Posted by tumburu View Post

Is there such a thing?

Is there?

post #1754 of 4059
Quote:
Originally Posted by tumburu View Post

Is there such a thing?

No. Should read as "most neutral so far."
post #1755 of 4059
Quote:
Originally Posted by milarepa View Post

Man the 334's are sweet. I almost prefer them over my hd650's to almost any recording, except those cuts who really suits a giant space.

What an iem, gotta post a pic of my rig just to brag. I feel slightly euphoric after using this for six hours so far today.... 

 

 

 

Must have that silver-cable... Well, guess I'll have to sell off my best kidney on ebay to get there now wink.gif

That looks really interesting. I think I can identify the iPod, the AlgoRhythm Solo, and the FitEar ToGo 334, but what is the amp? Thanks!

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