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Centrance Hifi-M8 and Hifi-M8 LX (8 versions!) impressions thread - Page 17

post #241 of 1319
Michael, in the past I've found that 3G on GSM phones doesn't induce as much interference as the non-3G mode, so maybe turning off 3G might help reproduce the noise. Sometimes, it's when it tries to acquire the 3G signal, so maybe going into and out of airplane mode, or turn off and then on 3G and wait? I've also seen more of the noise when it's just sitting around instead of when it's doing something. Perhaps the negotiation with the tower when the phone might expend more RF power (cf. early iPhone 3G battery and signal strength issues) is when it happens.

I do not have a M8 yet, and this was observed on other devices like cheap PC speakers.
post #242 of 1319

When a mobile changes tower, the mobile expends more power, and the radiation is stronger. So radiation will be stronger when the user is on the move as the mobile is searching for the nearest tower.

post #243 of 1319
Quote:
Originally Posted by moodyrn View Post

I would also like to add, I wonder if the type of headphones used plays a role if you hear the interference or not. I was using my jh13s. This may be a non issue with less sensitive cans. So Michael have you done your tests using very sensitive iems?

I was thinking the same thing this morning. We've used headphones with shielded wires for testing. Some headphones out there use un-shielded wires (twisted pairs), which basically are long receiving antennas. We will need to look for some HP here to try that don't use a shielded, properly grounded cable. 

post #244 of 1319
Quote:
Originally Posted by eron View Post

When a mobile changes tower, the mobile expends more power, and the radiation is stronger. So radiation will be stronger when the user is on the move as the mobile is searching for the nearest tower.

Yes, cell phones have adaptable radio transmitters, which negotiate with the nearest tower and adjust the strength of the internal transmitter to be just enough so that the signal reaches the tower, but not more. Otherwise the battery will drain too fast. This is why the battery drains faster in rural areas where the phone has to "scream" harder to reach a far-away tower. That's when the phone uses the most transmission power.

 

In order to simulate this condition and make sure we get the highest RF signal strength from the test phone, we used a metal box to place both the phone and HiFi-M8 into. The metal box effectively shielded the phone from the tower(s) by reducing the amount of RF energy entering the box.

 

We observed that just a single bar of antenna strength was barely visible during this test, while normally, 3-4 bars are visible in our area. Still, the interference could not be heard on our test headphones (Beyers).

 

We need to test with IEMs and especially those that use unshielded wires. That's my current hunch...

post #245 of 1319

Loved the sound of Beyerdynamic DT250/250oHm with M8: a powerful punch, accurate bass collected and smeared on a sound picture composition, my favorite mids did not disappoint: Voices sounded natural, guitar goes straight into the mind; treble delighted attack and a wide sound. Overall, I am satisfied with minor reservations.

 

I apologize for the bad English.

 

 

http://yadi.sk/d/ht8l608Q7jgmY ph34r.gif


Edited by IronLung - 8/9/13 at 11:24am
post #246 of 1319

Michael:

 

Any update on the 24/96 iOS issue?

post #247 of 1319
Nice pic iron lung.
post #248 of 1319
Quote:
Originally Posted by IronLung View Post

Loved the sound of Beyerdynamic DT250/250oHm with M8: a powerful punch, accurate bass collected and smeared on a sound picture composition, my favorite mids did not disappoint: Voices sounded natural, guitar goes straight into the mind; treble delighted attack and a wide sound. Overall, I am satisfied with minor reservations.

I apologize for the bad English.


 

http://yadi.sk/d/ht8l608Q7jgmY ph34r.gif

how do u pair ur iphone to m8? since u have the one which doesn't support idevices
post #249 of 1319

Centrance Hifi-M8 and Hifi-M8 LX (8 versions!) incoming impressions and appr...

Quote:
Originally Posted by hoekeat View Post

how do u pair ur iphone to m8? since u have the one which doesn't support idevices
It doesn't paired
post #250 of 1319

Not sure if this is the right thread to ask but hope it is fine to ask here.

 

Now that a number of M8 is in user hands, I wonder if there is any general sense as to:

 

1. Whether the M8 can be considered one of the best Dac/Amp combo for the price if strictly evaluated on audio quality alone, and not flexibility. I realize that the M8 is incredibly capable in terms of input and output options but I my question is more about audio quality.

 

2. How does the M8 sound compared to the DacMini when functioning as a DAC.   I am very interested in the M8 but also need it to function as a DAC going into a tube amp.  Of course, it cannot bypass the amp section so in effect, I will be putting the DAC output into two amps.   Currently, I am running a Eastern Electric Minimax Plus and am wondering how much I'll be giving up if I use the M8 as a DAC in place of the Minimax.... 

 

Any and all comments gratefully accepted.

 

Thanks!

UL

post #251 of 1319

On the road with the M8 - iDevice version w/ 240gb iPod and MG6PROs.  

 

post #252 of 1319
Quote:
Originally Posted by barbes View Post

On the road with the M8 - iDevice version w/ 240gb iPod and MG6PROs.  

 

Very nice!!  Initials impressions?

post #253 of 1319
Quote:
Originally Posted by pspivak View Post

Very nice!!  Initials impressions?

They're earlier in the thread. Very positive - I really like it.
post #254 of 1319
Quote:
Originally Posted by ULUL View Post

Not sure if this is the right thread to ask but hope it is fine to ask here.

Now that a number of M8 is in user hands, I wonder if there is any general sense as to:

1. Whether the M8 can be considered one of the best Dac/Amp combo for the price if strictly evaluated on audio quality alone, and not flexibility. I realize that the M8 is incredibly capable in terms of input and output options but I my question is more about audio quality.

2. How does the M8 sound compared to the DacMini when functioning as a DAC.   I am very interested in the M8 but also need it to function as a DAC going into a tube amp.  Of course, it cannot bypass the amp section so in effect, I will be putting the DAC output into two amps.   Currently, I am running a Eastern Electric Minimax Plus and am wondering how much I'll be giving up if I use the M8 as a DAC in place of the Minimax.... 

Any and all comments gratefully accepted.

Thanks!
UL

I'd also be interested in this as I want the best portable DAC or DAC/amp that I can take home and plug into my 300B. I wonder if the CLAS -db might be a better sounding DAC. Hopefully I can audition a M8 vs CLAS/Pico at some stage. Unless someone else here can provide feedback?
post #255 of 1319

Hi M Goodman,

 

I am having 2nd thought on my pre-order regarding the iDevice version..

 

So I am wondering, can the iDevice version be converted to LX model in the future?

   Do I have to ship it back to Centrance to be done.?

   What is the expected cost of doing it? excluding shipping..

  

 

reason is, once my iPods are dead, I will likely to switch to AK100 or maybe a Fiio x3.. or any other capable DAP...

 this will offload the apple format and iTunes from my HDD..

 

Also remember there is a list of DAPs that are compatible to both the iDevice and LX version..

 saw it somewhere but just could not remember where..

 

rgds

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