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Shure SE846 Impressions Thread
May 1, 2014 at 3:02 PM Post #2,131 of 22,945
What does an impedance adapter do? make it harder for current to reach the headphone? That's an interesting thing that I'd like to try just to see how it affects the sound.
 
I also wish there was a headphone jack adapter that told you exactly how many watts/volts were coming out of the jack, like via an LCD display. Seems  like it would be easy to make.
 
May 1, 2014 at 4:03 PM Post #2,132 of 22,945
In the case of iems it is a fixed EQ that plays off the iems impedance curve.  In the case of the 846 it boost bass and upper treble or looking at it the other way it scoops out everything from lower mids to lower treble.
 
May 1, 2014 at 4:43 PM Post #2,134 of 22,945
solude said:
For full sized cans yes, for iems no.
Click to expand...


Why is the AK240 better than M8 for iems?

The M8 has a selectable output impedance switch; 1, 2, 11 ohms. As well as 3 selectable gain levels.
 
May 1, 2014 at 5:38 PM Post #2,135 of 22,945
Big old hiss comes to mind :p
 
Centrance is working on an iem M8 that removes all the bad for iem design features.  And best of all it's slimmer.
 
May 1, 2014 at 9:11 PM Post #2,138 of 22,945
joshuachew said:
   
 
I tried a 75 Ohm Impedance adapter from my friend and I used it with the ZX1 and the SE846 and I noticed that it became smoother and with less grain and that the bass was fuller and round. Is it not advisable to use a impedance adapter with Multi driver IEM's? Sorry and I hope you guys could explain this to me. We're all here to learn aren't we? :/
Click to expand...

Hi, 
 
If you like the sound, than that's all there is to it.  But, it has been mentioned that the Multi-BA phones have crossovers that includes resistors in them for controlling which set of drivers output sound at what frequency ranges(high, mids, and lows) like the speakers with several cones in them.  Since the adapter is resistor also, it will change the resistance value of the crossovers(which the resistance values were specifically tuned for certain frequency ranges), and thus change the frequency range the drivers would output.  This is one of the reasons why people desire close to zero output impedance, and the adapter is essentially creating output impedance.
 
One exception to the resistor rule is the ER4S, in which ER4P with added 75ohm resistor is desired and referred to as ER4S.  Don't know the details of it, but I know ER4S is one driver iem so it should have no crossover.
 
May 1, 2014 at 9:39 PM Post #2,139 of 22,945
Drivers have impedance curves, even without crossovers.  Some of them more wild than others.  For example this is the HD800, bottom line is the impedance and from that you can see why otl tube amps and the hd800 for along so well... mid bass boost :wink:
 

 
May 1, 2014 at 9:59 PM Post #2,140 of 22,945
silverears said:
Hi, 

If you like the sound, than that's all there is to it.  But, it has been mentioned that the Multi-BA phones have crossovers that includes resistors in them for controlling which set of drivers output sound at what frequency ranges(high, mids, and lows) like the speakers with several cones in them.  Since the adapter is resistor also, it will change the resistance value of the crossovers(which the resistance values were specifically tuned for certain frequency ranges), and thus change the frequency range the drivers would output.  This is one of the reasons why people desire close to zero output impedance, and the adapter is essentially creating output impedance.

One exception to the resistor rule is the ER4S, in which ER4P with added 75ohm resistor is desired and referred to as ER4S.  Don't know the details of it, but I know ER4S is one driver iem so it should have no crossover.
Click to expand...
solude said:
Drivers have impedance curves, even without crossovers.  Some of them more wild than others.  For example this is the HD800, bottom line is the impedance and from that you can see why otl tube amps and the hd800 for along so well... mid bass boost :wink:
Click to expand...

http://www.head-fi.org/t/695086/ifi-nano-ican-name-that-attenuator-competition-nano-ican-or-1-head-fi-rated-micro-ican-up-for-grabs

Thanks for the reply guys.

I actually got the idea to use impedance adapters from the link above a few days ago. As they described them to be used for IEMs with desktop amps. Are attenuators the same as impedance adapters?
 
May 1, 2014 at 10:39 PM Post #2,141 of 22,945
joshuachew said:
http://www.head-fi.org/t/695086/ifi-nano-ican-name-that-attenuator-competition-nano-ican-or-1-head-fi-rated-micro-ican-up-for-grabs

Thanks for the reply guys.

I actually got the idea to use impedance adapters from the link above a few days ago. As they described them to be used for IEMs with desktop amps. Are attenuators the same as impedance adapters?
Click to expand...

Yes, they are resistors, same difference.  I would not recommend it. I would not recommend the amp for sensitive iems if it needs this.  
 
The use of an attenuator could be due to too much gain for sensitive iems.  Possibly there is some channel imbalance at low volume, so it may attenuate the voltage to the headphones so that the pot can be pushed to the point where it is balanced.  Or reduce hiss that is picked up by the headphones. Are you using this amp?
 
May 3, 2014 at 2:52 AM Post #2,142 of 22,945
Just got my Shures and i have to say i was never really a big fan being an ex owner of 3 different ones incl. 535.
However,this early morning,putting these babies on has been like a sweet girl massaging me with the finest oils:blush::blush::blush:
I certainly didn't expect that, same sound sign from before, but on a completely different league.
Earphones are getting insanely good these days, coming from Dita Truth and Merlins (+many more i don't use at the mo)!
The 846's sound fab out of the box with DX90 via Pureii
Very happy:thumbsup::thumbsup::thumbsup:
 
May 3, 2014 at 3:00 AM Post #2,143 of 22,945
Biggest worry has been the treble of course and yes its subdued, but its there in a very present way, im sure in a direct comparrison with a lot of my other iem's it'll feel backgroundish, but this is a non fatiguing, gorgeously musical presentation i don't have a problem with. And i haven't tried any tips or filters yet, just straight out of the box,
Yes, a tad more physical sparkle would have been nice, but nothing i couldn't live without, all the glorious detail is there..just a different presentation that'll be great for longer listening sessions, my ears are more importantant to me and it seems shure knows that:stuck_out_tongue_winking_eye:
And what a detail:blush:!!!
£700 very well spent indeed:thumbsup:
 
May 3, 2014 at 3:09 AM Post #2,144 of 22,945
Ha!changed some tips and guess what?
Treble's here!
White filter is nothing like what i expected reading reviews, like it so far better than the blue/neutral,tho i can live with both,prob will swap around for a while the next few days.
All good:blush:
 
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