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New JH Audio flagship! "Siren Series Roxanne" - Page 417

post #6241 of 8284
Quote:
Originally Posted by krismusic View Post


Yep. I agree completely. I use the O2. Something more high falutin may well sound even better but the O2 is good enough for me.

I just picked up a used Predator with like 50 hours on it.... I like it so far - I'm told it likes hundreds of hours before it settles - soundstage is big - no added flavor - others mentioned a warm signature, but it isn't anything that is affecting details - it just sounds really damned musical - if that means anything - lol. AND the technology is advanced to the point where the DAC works with a Mac - unlike my DX90.

post #6242 of 8284
Quote:
Originally Posted by krismusic View Post


I don't have the Rox. frown.gif However. I do have the 13fp. smily_headphones1.gif I use them with the iPhone 5s and no amp. An amp does give a small improvement but the 13's are so nice that a the loss of a small improvement is irrelevant IMHO. I would imagine that I would feel the same about any CIEM at this level. The pleasure of not carting an amp around is worth the minimal loss of SQ. Again IMHO. YMMV.

 

So you're saying that the 13s are well driven by the iphone?

Quote:
Originally Posted by SilverEars View Post
 

 

Wow, Roxannes are very sensitive.  Based on what is spec'd I wouldn't say an amp would not make that big of a difference, but from my experience low output impedance with high voltage supply supply amps brings out more dynamism.  With sensitivity like these, I can't say if there would be that big of a difference. 

 

SOUND QUALITY

  • Frequency Response: 10Hz to 23kHz
  • Input Sensitivity: 119dB @ 1mW
  • Impedance: 15 Ohms
  • Freqphase time|phase WaveGuide

What do you mean by very sensitive? Does that mean the iPhone could drive all the drivers in the Roxanne easily? 

post #6243 of 8284
Quote:
Originally Posted by zerox17virus View Post

 

What do you mean by very sensitive? Does that mean the iPhone could drive all the drivers in the Roxanne easily? 

Yup, how easily it can be driven or how loudly it gets with lower power input(it gets loud). It can be driven very easily.  I predict it to be highly susceptible to hiss(Possibility of hearing hiss with ZX-1) based on the spec'd value.  Also the impedance value is quite low compared to the 13 pro.  13 pro would be more stable with various DAPs with several types of output impedances.

 

JH13 pro

SOUND QUALITY
Frequency Response: 10Hz to 20kHz
Input Sensitivity: 116dB @ 1mW
Impedance: 28 Ohms
Freqphase time|phase WaveGuide

post #6244 of 8284
Quote:
Originally Posted by zerox17virus View Post

 

So you're saying that the 13s are well driven by the iphone?

What do you mean by very sensitive? Does that mean the iPhone could drive all the drivers in the Roxanne easily? 

 




As a rough guide, anything at least 100dB @ 1mW of sensitivity with a load of 32 ohms or below can be driven by an iPhone or any other portable device at a very acceptable level. Roxanne is very sensitive @ 119dB and should not be an issue in terms of power output.

People use an amp for ciems if the output impedance of the portable device is high enough that it affects the frequency response of low impedance iems like Roxanne. Others just like the pairing of their favorite amp with their iem.
post #6245 of 8284

Ok thanks. Is what should I really look for in specs to tell me that the headphone is good? In terms of impedance,  input sensitivity and frequency response? Sorry really should put this somewhere else. And in regards of those terms compared to the Roxanne, is it good?

post #6246 of 8284
Quote:
Originally Posted by SilverEars View Post

Yup, how easily it can be driven or how loudly it gets with lower power input(it gets loud). It can be driven very easily.  I predict it to be highly susceptible to hiss(Possibility of hearing hiss with ZX-1) based on the spec'd value.  Also the impedance value is quite low compared to the 13 pro.  13 pro would be more stable with various DAPs with several types of output impedances.

JH13 pro
SOUND QUALITY

Frequency Response: 10Hz to 20kHz

Input Sensitivity: 116dB @ 1mW

Impedance: 28 Ohms

Freqphase time|phase WaveGuide


Lower impedance makes for more stable sound, not higher.
post #6247 of 8284
Quote:
Originally Posted by Trogdor View Post

Lower impedance makes for more stable sound, not higher.

On a source yes, on a iem or heaphone higher impedance is more stable and less susceptible to FR variations due to higher output impedance values on the dap.

For instance the 3.3 ohms OI of the iPhone 5 doesn't sound so good with the ridiculously low impedance of the SE846 (8ohm).
post #6248 of 8284
That's one reason to use an external amp, to help with impedance issues. Another is volume control especially if the amp has different gain settings and finer volume adjustment.
Edited by bearFNF - 6/23/14 at 8:23am
post #6249 of 8284
Quote:
Originally Posted by shotgunshane View Post

On a source yes, on a iem or heaphone higher impedance is more stable and less susceptible to FR variations due to higher output impedance values on the dap.

For instance the 3.3 ohms OI of the iPhone 5 doesn't sound so good with the ridiculously low impedance of the SE846 (8ohm).

Please read.

Headphone impedance changes with frequency. If the output impedance is much above zero this means the voltage delivered to the headphones will also change with frequency. The greater the output impedance, the greater the frequency response deviations.

Just one snip, but the whole article is excellent.
post #6250 of 8284
Great article, I just emailed to myself to read later. Thanks...
post #6251 of 8284
Quote:
Originally Posted by Trogdor View Post

Please read

Headphone impedance changes with frequency. If the output impedance is much above zero this means the voltage delivered to the headphones will also change with frequency. The greater the output impedance, the greater the frequency response deviations.

Just one snip, but the whole article is excellent.

Which is in agreement with my statement.
Edited by shotgunshane - 6/23/14 at 8:44am
post #6252 of 8284
Quote:
Originally Posted by Trogdor View Post

That's very common.

@Mimoullie: I would continue to listen to them to see if your right ear adjusts. I had this issue very briefly with the very first CIEM I ever tried (general soreness). Ears adjusted, never had pain since.
I wish...Unfortunately it is my 5th pair of CIEM and I know what fits. My ears actually changed last year as I wore braces (yes as an adult) so I had to reshell both SE5 and NT6...Roxannes are definitely too big. I was hoping not as I had the prints done at the end of the braces but still happened.
post #6253 of 8284
Quote:
Originally Posted by Mimouille View Post

I wish...Unfortunately it is my 5th pair of CIEM and I know what fits. My ears actually changed last year as I wore braces (yes as an adult) so I had to reshell both SE5 and NT6...Roxannes are definitely too big. I was hoping not as I had the prints done at the end of the braces but still happened.

Hmmm, I'm going from the JH16FP -> Roxannes. No issue, exact same mold. Not saying you don't have an issue, just offering a data point.
post #6254 of 8284
Ok now soundwise...I only listened to more or less 30mn in two sessions today. Because of the fit it hurts to listen more. I like the bass, I like the texture and overall tonality of the sound, I really like the soundstage, very enveloping and involving. What I am less convinced with so far is the treble...lacks some air with the 901...maybe source and cable will help but my 240 is away.
post #6255 of 8284
Quote:
Originally Posted by shotgunshane View Post

Which is in agreement with my statement.

"On a source yes, on a iem or heaphone higher impedance is more stable and less susceptible to FR variations due to higher output impedance values on the dap."

Actually the two should be matched. But in general on IEMs you want lower output impedance given their use case (what you plug them into, iPods, etc.). I don't know of any IEM that has over 100 output impedance. I think people complained the JH13P 16's output imp was high at one point.
Edited by Trogdor - 6/23/14 at 9:00am
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