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The New iRiver AK100: A High-End DAP - Page 536

post #8026 of 8825
Beating around the bush is not needed in this case rolleyes.gif
post #8027 of 8825

Has anybody already tried out the FAD Pandora VI with the AK100 ? I just ordered them on a terrific deal. (Don't know why they were so affordable")

As far as I have read they have an impedance of 8 Ohm (!!) - I am wondering if the stock AK100 can drive them ...? If I just takte the numbers the AK100 shouldbn't be able to - but other people wrote that they were very easy to drive - so I am pretty curious.

post #8028 of 8825
Quote:
Originally Posted by AlterSack View Post
 

Has anybody already tried out the FAD Pandora VI with the AK100 ? I just ordered them on a terrific deal. (Don't know why they were so affordable")

As far as I have read they have an impedance of 8 Ohm (!!) - I am wondering if the stock AK100 can drive them ...? If I just takte the numbers the AK100 shouldbn't be able to - but other people wrote that they were very easy to drive - so I am pretty curious.

 

8 ohms is not high.   A lot of headphones are 32 ohms or higher.   The AK should not have any problems driving them. ( In addition, sensitivity and efficiency are generally more telling.   A set of headphones can have really high impedance but can still be easily driven if they are efficient and/or sensitive.)

post #8029 of 8825

Pretty sure he's referring to the 20ohm output messing with the impedance curve of a 9ohm iem.

post #8030 of 8825
The unmodded AK100 has problems getting the best out of some IEMs. The XBA4ip and the W4R are examples of this, whereas the Klipsch X10is and Sennheiser HD800s absolutely shine.
To spend serious money on the offchance the IEMs are a good match is risky without a good money back guarantee
post #8031 of 8825
Quote:
Originally Posted by AlterSack View Post
 

Has anybody already tried out the FAD Pandora VI with the AK100 ? I just ordered them on a terrific deal. (Don't know why they were so affordable")

As far as I have read they have an impedance of 8 Ohm (!!) - I am wondering if the stock AK100 can drive them ...? If I just takte the numbers the AK100 shouldbn't be able to - but other people wrote that they were very easy to drive - so I am pretty curious.

 

Easy to drive isn't necessarily enough unfortunately.

 

I just did some research on the Pandora having never heard of them before. They use a dynamic driver coupled with a balanced armature in a full sized headphone! Because of this, 2 things will go against them being a good match with the AK100.

 

Firstly, the low nominal impedance may lead to boomy, sloppy bass when paired with the AK100. One of the reasons for the 1/8 rule (i.e. driver impedance should be at least 8x the output impedance) is the ability of the amplifier (AK100 in this case) to control the movement of the driver. The AK100 will have no trouble making the driver move, but may have trouble stopping it from moving - hence the risk of boom, loose bass. There is a little bit more to this than what I've explained (and what I fully understand) and there are exceptions, but there's a very good chance that the AK100 will not sufficiently control Pandoras to their peak performance.

 

The second issue is almost a lock to occur. By pairing a dynamic and a BA driver you're almost guaranteed to get a significant variance in the impedance of the Pandoras at different frequencies (i.e. impedance could be much higher and / or lower than 8 ohms at certain frequencies). Coupled with the stock AK100's high output impedance this means you'll get significant differences in the amount of power delivered to the drivers at different frequencies. That means major fluctuations to the frequency response that you hear. Sometimes the changes can be "desirable", but often it takes the sound too far from what the headphones were meant to sound like. This is the issue that causes the AK100 to pair poorly with W4Rs and XBA4ips as mentioned by Takeanidea.

 

My suggestion would be to demo before buying (or ensure money back option like Takeanidea said). Alternatively, be prepared to spend a further few hundred bucks on an amp to add to the chain, but make sure said amp has an output impedance <1 ohm (something like the Tralucent T1 or Fiio E12DIY would be a good option).

post #8032 of 8825

Wow that's odd. I've gone the other way DX50 to AK100, and so happy that I did for many reasons, too many to list. Had two DX50s both had different hardware faults, and to my ears sounds inferior to the AK100.

 

sorry, meant to quote a previous post, my bad.


Edited by drofeel71 - 2/20/14 at 8:08pm
post #8033 of 8825
Quote:
Originally Posted by drofeel71 View Post
 

Wow that's odd. I've gone the other way DX50 to AK100, and so happy that I did for many reasons, too many to list. Had two DX50s both had different hardware faults, and to my ears sounds inferior to the AK100.

 

sorry, meant to quote a previous post, my bad.

 

I also have both and definitely prefer the AK100 over the DX50.  The AK provides much cleaner sound.  The treble on the DX50 is really rough and harsh; the overall sound is murky to me.   I only use the DX50 to listen in bed; don't care if I break it by sleeping on it.

post #8034 of 8825

Thx Loquah - that's basically what I feared.  On the other hand I didn't plan to use them on the go - so I'll use them with my JDS O2.

I guess the O2 should be able to deliver <1 ohm.


Edited by AlterSack - 2/21/14 at 12:48am
post #8035 of 8825
Quote:
Originally Posted by Solude View Post
 

Pretty sure he's referring to the 20ohm output messing with the impedance curve of a 9ohm iem.

 

You are right - that's what I was thinking of.

 

Quote:
Originally Posted by Takeanidea View Post

The unmodded AK100 has problems getting the best out of some IEMs. The XBA4ip and the W4R are examples of this, whereas the Klipsch X10is and Sennheiser HD800s absolutely shine.
To spend serious money on the offchance the IEMs are a good match is risky without a good money back guarantee

Thx - The Pandora are no IEMs but Final Audio's  First On Ear HPs, but tehy also use Balanced armature drivers and only have 8 ohms.

Anyway the deal I could get is financially so intersting that I won't loose money on these :D

post #8036 of 8825
Quote:
Originally Posted by AlterSack View Post
 

Thx Loquah - that's basically what I feared.  On the other hand I didn't plan to use them on the go - so I'll use them with my JDS O2.

I guess the O2 should be able to deliver <1 ohm.

 

Yeah, O2 will do fine. Should sound great!

post #8037 of 8825

DOES AK 100 MATCH WELL WITH THE UM MIRACLE BECAUSE THEY SAID UM MIRACLE NEED VERY LOW IMPEDANCE OUT PUT (<1) While AK100 have very high (>22) so Will it be a good combo?

post #8038 of 8825

No reason to buy an original AK100 with the mk2 available.

post #8039 of 8825
And no, stock AK100 mk1 doesn't pair well with Miracles. An amp or mod is a must otherwise bass is very rolled off.
post #8040 of 8825

So do you have any suggestion for an DAP that match well with Miracle without an amp which price < 500usd ?

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