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The Astell and Kern AK240 Impressions Thread - Page 12

post #166 of 1653

6 hours?For real?That is a killer for me sadly.I get about twice that with my 120 Titan and that is pretty much the bare minimum as far as I am concerned!As great as the 240 sounds a product costing 2500 US dollars cant last for all of 6 hours,at least not for me!A shame!

post #167 of 1653

I have been using my AK240 with my Shure 846. It sounds amazing. The instrument separation is excellent. The sound stage is expansive. Volume level of 35 is more than enough for most music. I had to turn up AK120 to close to 50 for my Shures. I have been listening to DSD files only. The native DSD support sounds so much better than the PCM conversion in AK120. But when you use DSD, your battery drains quite fast. I am getting about 5 hours. I will be loading up my FLAC files tomorrow. That will help me compare AK240 and AK120 one on one.

I am very happy with my investment. I have put in a request with Moon Audio for an adapter cable for the balanced output. I will post what that sounds like.

 

I listen to my 120 Titan with my 846 at a volume level of between 30-35 pretty much,I am surprised that you would have needed to listen at 50.In fact,I dont think I could tolerate volume levels of 50 without hurting my hearing.I listen to WAV files copied from my CD collection.

post #168 of 1653

I'm receiving my AK240 this Friday, so I'm quite excited. I'm going to likely purchase a pair of LCD-XCs to match up with them—maybe LCD-Xs instead—and I was wondering if anyone here has that combination and can remark on the cohesion between the two.

 

Also, is the 2.5mm male connector for the balanced out a potential source of trouble given its small diameter? I worry that it may bend or break more easily than the 3.5mm.

post #169 of 1653
Quote:
Originally Posted by jwbrent View Post

 

.....is the 2.5mm male connector for the balanced out a potential source of trouble given its small diameter? I worry that it may bend or break more easily than the 3.5mm.

 

Absolutely. One of it's "questionable" design features..:(​    

 

Have fun finding a high quality 2.5mm TRRS (iPhone) plug that even comes close to the quality level expounded by the 240's marketing.


Edited by burtomr - 3/5/14 at 7:20pm
post #170 of 1653
Quote:
Originally Posted by jlbrach View Post

6 hours?For real?That is a killer for me sadly.I get about twice that with my 120 Titan and that is pretty much the bare minimum as far as I am concerned!As great as the 240 sounds a product costing 2500 US dollars cant last for all of 6 hours,at least not for me!A shame!
That question should have been answered more than once already in this thread. Anyway it's defintiely way more than 6 hours, personally listening to 16/44.1 on unbalanced (i.e. regular 3.5mm) port kills about 10% of battery per hour for me, so it can last close to 10 hours.
post #171 of 1653

For anyone interested, Moon Audio has the connectors for the AK 240 Balanced output. I have ordered an adapter cable (Silver Dragon V1 mXLR to TRRS) & a Line Out balanced TRRS to ALO/RSA balanced.

post #172 of 1653
Quote:
Originally Posted by burtomr View Post
 

 

Absolutely. One of it's "questionable" design features..:(​    

 

Have fun finding a high quality 2.5mm TRRS (iPhone) plug that even comes close to the quality level expounded by the 240's marketing.

 

Not sure why such a connector was chosen when a 3.5mm could have been used. I wouldn't think there'd be much of a size difference between the female connectors. 

 

A&K should release their top end IEMs fitted with a quality 2.5mm. 

 

I may cannibalize the included balanced cable with the LCD-XCs and solder on a 2.5mm just to try the balanced output. I would need the pin configuration, though. Anybody know?

post #173 of 1653
Quote:
Originally Posted by sathyam View Post
 

For anyone interested, Moon Audio has the connectors for the AK 240 Balanced output. I have ordered an adapter cable (Silver Dragon V1 mXLR to TRRS) & a Line Out balanced TRRS to ALO/RSA balanced.

 

Please report back with your thoughts on sound and build quality once you receive the adapter. Build quality is a major deal for me since I'm anal about my hifi gear.

post #174 of 1653
Quote:
Originally Posted by jlbrach View Post

6 hours?For real?That is a killer for me sadly.I get about twice that with my 120 Titan and that is pretty much the bare minimum as far as I am concerned!As great as the 240 sounds a product costing 2500 US dollars cant last for all of 6 hours,at least not for me!A shame!


 



6 hr is only for DSD playback. If your playing flac it will last over 12hrs.
post #175 of 1653
Quote:
Originally Posted by jwbrent View Post
 

 

Please report back with your thoughts on sound and build quality once you receive the adapter. Build quality is a major deal for me since I'm anal about my hifi gear.

 

The cables from Moon Audio that I had ordered are of very good quality. Drew has made an adapter system for my SE846 & LCD-2.2. So, now all I need is an adapter cable for the new connector.

post #176 of 1653
Quote:
Originally Posted by sathyam View Post
 

 

The cables from Moon Audio that I had ordered are of very good quality. Drew has made an adapter system for my SE846 & LCD-2.2. So, now all I need is an adapter cable for the new connector.

 

good to know. I look forward to your comments ...

post #177 of 1653
Quote:
Originally Posted by jwbrent View Post
 

 

Not sure why such a connector was chosen when a 3.5mm could have been used. I wouldn't think there'd be much of a size difference between the female connectors. 

 

 

 

Probably to keep people from plugging their 3.5 3-pole plug into the balanced jack by mistake.   This would likely cause a short.

post #178 of 1653
Quote:
Originally Posted by Bluebear View Post

Compared with HM-901 balanced out?

I only got the balanced cable not long ago and I haven't been able to source any 2.5mm trrs female jack yet to allow this cable to be used on the hm901, nor even a balanced/unbalanced comparison with this same cable on AK240 yet.



As an aside, I much prefer Hifiman's implementation of the combo balanced/normal 3.5mm jack where you can simply switch from single ended to balanced with a physical toggle. I don't need any external converter cable. The same jack also accommodate normal cable. With AK240, in addition to using separate jacks with freaking different size that necessitates either a converter or another cable altogether, I also need to go into Setting menu to toggle normal vs balanced. As much as we knock hifiman's UI, the whole balanced design imo is much better thought out than iriver. Probably iriver is just too arrogant to "follow" hifiman's design, or to avoid patent issue (read: royalties). frown.gif

I will probably be able to share more impression on bal vs se later. Initial impression is pretty much in line with the Bal v SE experience on HM901 - wider sound stage, more clarity, higher power, less black background. And I don't feel AK240 bal has much material advantage over HM901 balanced.
Edited by kkcc - 3/6/14 at 12:55am
post #179 of 1653
Quote:
Originally Posted by kkcc View Post

Probably iriver is just too arrogant to "follow" hifiman's design, or to avoid patent issue (read: royalties). frown.gif
 

..........:beerchug:...........(There's no patent...it's just a jack and a switch.)

post #180 of 1653
Quote:
Originally Posted by daseinpdx View Post
 

 

Probably to keep people from plugging their 3.5 3-pole plug into the balanced jack by mistake.   This would likely cause a short.

 

You're possibly right. But from my estimation, the 4-pole connector goes like this:

 

tip - left hot

ring 1 - right hot

ring 2 - left invert

sleeve - right invert

 

Not sure how the ground is implemented if this is correct. Anyway, assuming I am correct, ring 2 would connect with ground on a 3.5mm non-balanced input. Generally, on a non balanced connection, the invert signal is combined with the ground, thus, would connecting a balanced headphone to a non-balanced connector truly cause a short and damage the AK240 or headphones? Something doesn't sound right. Maybe it's me ... :redface:

 

My familiarity with balanced connections is from the High End home audio arena where a 3 connection XLR—pin 1 ground, pin 2 hot, pin 3 invert—is used per channel. On the receiving end, a differential amplifier results in common mode rejection thereby providing a lower noise floor and a 6db increase in signal. Not all balanced connections in home audio are truly balanced: a phase splitter is sometimes used to create the separate invert signal thus negating the advantage of a true balanced signal path.

 

I'm not clear if a balanced connection with headphones follows this same practice. Any help on this would be greatly appreciated ...

 

Oh, and sorry to divert the thread away from impressions on the AK240, but there is a stream of thought going on here.

 

Just found out that my AK240 is not arriving until Monday or Tuesday ... this after receiving a few earlier dates on shipment. :frown: 


Edited by jwbrent - 3/6/14 at 8:37am
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