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The Centrance HiFi M8 thread - Page 344

post #5146 of 5157
Quote:
Originally Posted by headwhacker View Post
 

 

I'm talking about the same view as the pic. You got it the wrong way. Your M8 as depicted in this pic is set to 11 ohms OI. The lowest value (1 ohm) is the right-most position of the switch.


Michael Goodman responded to my email and you are correct, it is 11, 2, 1 as read from left to right when looking from the straight-on perspective of the picture in my earlier post.

 

I stand corrected, I must have thought that was referring to looking at it upside down, which many people do.


Edited by MikeyFresh - 12/17/14 at 4:50pm
post #5147 of 5157
Quote:
Originally Posted by MikeyFresh View Post
 


Michael Goodman responded to my email and you are correct, it is 11, 2, 1 as read from left to right when looking from the straight-on perspective of the picture in the above post.

 

I stand corrected, I must have thought that was referring to looking at it upside down, which many people do.

 

I see, well in that case I think mr Goodman should spend some time reading this http://www.amazon.com/Design-Everyday-Things-Donald-Norman/dp/0465067107 :D

 

But I'm pretty sure there is a valid technical reason behind this decision. I always used the m8 with high impedance hp so that switch hadn't any particular effect I could hear, but was pretty obvious with my recently bought jvc iems... basically I was enjoying more the 2 ohm imp. while I found dull the 11, thinking erroneously that was the 1 ohm!! 

Thanks 

post #5148 of 5157
Quote:
Originally Posted by thomascrown View Post
 

 

I see, well in that case I think mr Goodman should spend some time reading this http://www.amazon.com/Design-Everyday-Things-Donald-Norman/dp/0465067107 :D

 

But I'm pretty sure there is a valid technical reason behind this decision. I always used the m8 with high impedance hp so that switch hadn't any particular effect I could hear, but was pretty obvious with my recently bought jvc iems... basically I was enjoying more the 2 ohm imp. while I found dull the 11, thinking erroneously that was the 1 ohm!! 

Thanks 


He said it was done that way to mimic the effect of the gain switch in terms of softest to loudest, the audio level goes up as you move the switch left to right.

 

That does make sense in terms of matching the other switches in audio level, each of which increases as you move their position left to right.

post #5149 of 5157
Quote:
Originally Posted by MikeyFresh View Post
 


He said it was done that way to mimic the effect of the gain switch in terms of softest to loudest, the audio level goes up as you move the switch left to right.

 

That does make sense in terms of matching the other switches in audio level, each of which increases as you move their position left to right.

I'd say they could have printed it on the unit to reduce the confusion to 0 :D

post #5150 of 5157
Hmm, the first post if this thread isnt helpful either.

I will send him the updated version from the hifi-m8 impressions thread.

Please look there for extra information on the op.

Also check out the hifi-m8 wiki which one helpful member made.

I remember most of us thought the impedance switch was 1,2,11 at first until i messaged mgoodman and found out it was 11,2,1ohms.
post #5151 of 5157
Quote:
Originally Posted by ExpatinJapan View Post

Hmm, the first post if this thread isnt helpful either.

I will send him the updated version from the hifi-m8 impressions thread.

Please look there for extra information on the op.

Also check out the hifi-m8 wiki which one helpful member made.

I remember most of us thought the impedance switch was 1,2,11 at first until i messaged mgoodman and found out it was 11,2,1ohms.

 

So did I. Which contributed to my early impressions that M8 had a rolled off bass. It turns out I was using 11 ohms output impedance on a 22 ohm and below iems I have.

 

Setting it to 1 Ohm and it's completely transparent. I can't hear any difference between M8 and my O2+ODAC combo. The only thing I don't like now with M8 is the rustling noise when turning the volume knob. (also a bit disappointed that it's not a fully balanced source as I thought it was when I got it and only have a balanced output) 

post #5152 of 5157
Quote:
Originally Posted by headwhacker View Post
 

 

.The only thing I don't like now with M8 is the rustling noise when turning the volume knob...

yeah, but that's only on the iems, it can be hardly considered an "issue". For sure it affects the quality perception of the m8 (and I love it)

post #5153 of 5157
Quote:
Originally Posted by thomascrown View Post
 

yeah, but that's only on the iems, it can be hardly considered an "issue". For sure it affects the quality perception of the m8 (and I love it)

 

I can hear it on my full-size cans too. T1, HE-400i and 325e.

post #5154 of 5157
Quote:
Originally Posted by headwhacker View Post
 

 

I can hear it on my full-size cans too. T1, HE-400i and 325e.

oh, I see! what about the "thump!" you can hear when turning on/off the unit? Do you have any? (I do)

post #5155 of 5157
Quote:
Originally Posted by thomascrown View Post
 

oh, I see! what about the "thump!" you can hear when turning on/off the unit? Do you have any? (I do)

Yes I do, but it's very soft and does not bother me. 

post #5156 of 5157

I have messaged the updated OP to firev1.

 

Here it is in all its blazing glory.

 

__________________________________________

 

Due to several requests that from the HF community  that a Head-fier who have actually pre-ordered a unit should start a thread I have made this impressions thread.

 

This thread is in development.

 

1). OP/first page is general information and specs(In development).

2). Second post is a FAQs.

3). Third post is where you will find  impressions/appreciation etc.

 

OS ipods

AK120

Samsung Galaxy

________________________________________________

 

Initial head-fi hifi-m8 thread

http://www.head-fi.org/t/622939/the-centrance-hifi-m8-thread

 

Website with general information

http://centrance.com/products/hifi-m8/

 

Hifi-m8 blog

http://centrance.com/products/new/blog/

 

 

*Hifi-M8 wiki

http://centrance.laurenson.com/index.php?title=Contents

_________________________________________________

 

*Impedance switch is 11-2-1.

_________________________________________________

 

Jude of head-fi fame video review of the Hifi-m8 and LX August 2013.

 

______________________________________________________________________________

 

And one of the greatest designer of DAC/Amps etc of course, jokes are often directed at the ones we admire and love.

________________________________________________________________________________

 

Let’s recap:  There will be 8 versions of HiFi-M8 in total.

That’s four versions of HiFi-M8 and four versions of HiFi-M8 LX.

 

 

KEY POINT:

As a reminder, HiFi-M8 LX has S/PDIF input and USB input, while HiFi-M8 has iDevice input and USB input.

 

Each product will come with a choice of side panels, as follows:

 

– Unbalanced: 1/4″ jack, 1/8″ jack and Balanced 4-Pin XLR jack

– Unbalanced: 1/4″ jack, 1/8″ jack and Balanced 4-pin RSA jack

– 2x Neutrik Combo jacks offering balanced and unbalanced output

– 2x Neutrik Male XLR  jacks offering balanced output (this is the Pro version)

 

The “heart” will be the same across all products, but the connectors will differ. The side panel PCBs are making the different products possible.

 

Support for Unbalanced OR Balanced headphones, IEMs and overhead

x.gif bullet_vio.gif  

 

x.gif bullet_vio.gif  

 

x.gif11ohm, 2ohm, 1ohm. bullet_vio.gif x.gif

Three levels of output impedance, for best headphone linearity

 

voltage

  -2 dBV (nominal, max gain)use with less-sensitive over-the head headphones

   

-10 dBV (nominal, mid gain) use for connecting to line-level consumer audio equipment

   

-22 dBV (nominal, min gain) use with ultra-sensitive IEM headphones

bullet_vio.gif x.gif

Three levels of headphone gain, for headphone sensitivity matching

x.gifFlat, +, ++ bullet_vio.gif x.gif

Three levels of bass sonic shaping, for matching to various headphones

x.gifFlat, +, ++ bullet_vio.gif x.gif

Three levels of treble sonic shaping, for matching to various headphones

x.gif      

RE: Bass and Treble switches:

`Each gives a slight boost of about 3 dB in the ++ position. Bass accentuates the kick drum area and treble lifts the "sheen" at the top. These are not plain vanilla shelves found in consumer stereos. Both curves have complex shaping and come from years of studio recording experience. They are very subtle-sounding`- M.Goodman

 

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90

 

 

Digital specs

 
x.gif

Resolution

24-bit (Also supports 16-bit)

x.gif

Sample Rate

USB: 44.1 kHz, 41 kHz, 88.2 kHz, 96 kHz, 172.4 kHz, 192 kHz

 

Interface

USB Host and Device compatible

 

Local clock

10 ppm precision, unmeasurable jitter

 

Compatibility

iPad, iPhone, iPod, Mac, PC

 

Analog Specs

 
 

Freq. Response

20 Hz...50 kHz (flat EQ circuit)

 

S/N Ratio

113 dB (A-weighted)

 

THD+N

0.002 % (mid gain position)

 

Crosstalk

-103 dB (at 1kHz)

 

Output Impedance

11, 2, 1 Ohm, selectable

 

Output Power

1.4 W (max), 1 W (typical)

 

Headphones

16...600 Ohm

 

Output voltage

-2 dBV (nominal, max gain) use with less-sensitive over-the head headphones

   

-10 dBV (nominal, mid gain) use for connecting to line-level consumer audio equipment

   

-22 dBV (nominal, min gain) use with ultra-sensitive IEM headphones

 

 
   

+19.0dBV (600 Ohms load) (still verifying)

* Listening to IEMs or other high sensitivity headphones at maximum level may damage your hearing.

 

 

General Specs

 
 

 

 

Audio Output

 XLR balanced, 1/8" combo, 1/4"    unbalanced jack, model-dependent

 

Headphone Amp

Direct Class-A

 

AC Powering

Globally compatible, 90...240V AC power supply included

 

DC Powering

+9...+20V DC (3A) from external adapter, car, boat, etc.

 

Internal supplies

Battery-isolated, filtered ±10V, super-clean analog rails

 

Unit Dimensions:

127 mm (L) x 82 mm (W) x 33 mm (H)

 

Shipping weight:

the shipping weight is 905g (2.0lb)

The unit is 331g (or almost 12 oz)

 

 

 

 

 

 

 

 

 

 

 

http://www.innerfidelity.com/content/show-newport-2013-highlight-centrance-hifi-m8 


Edited by ExpatinJapan - Today at 12:59 pm

-= Hifi-M8 - ipod touch 5G 64 GB/Flacplayer app - ATH-ESW11.Ltd.Ed/DITA The Truth =-

 

*My opinions are those of a possibly tone deaf hobbyist.:)

post #2 of 1257
5/7/13
THREAD STARTER 
 
  • 100x100px-LS-dace09a0_kitty_icon.JPG
  • 2,582 Posts. Joined 6/2010
  • Location: Japan, Tokyo.

____________________

 

 Hifi-M8 and friends FAQ.

____________________

 

*Hifi-M8 wiki

http://centrance.laurenson.com/index.php?title=Contents

_________________________________________________

 

*Impedance switch is 11-2-1.

 

_______________________________________________________________

*Line out: Set the gain at 2 and turn the volume to maximum, this is effectively the Line Out.

HiFi-M8 is designed so that you can achieve "line level" output by keeping the gain switch in the middle position and putting the volume control all the way up.

-Kenny/Kefsef10 (Centrance)

________________________________________________________________

*Galaxy S4:Samsung S4 > ibasso otg cable > Hifi M8 

As expected, it only works with USB Audio Recorder Pro app. (same as my Dacport)

Thanks to Wormsdriver.

 

Centrance windows driver to work with a PC

http://centrance.com/downloads/ud/

HiFi-M8 supports 24-bit / 192kHz  asynchronous audio under Windows. The latest driver release 7.4.5 is compatible with XP, Windows 7 and Windows 8.

No driver required to work with MACs (already built in).

_________________________________________________________________

 

Charging.

Quote:
Originally Posted by edm230 View Post

get it yet biggrin.gif
how I know the charge is completed?

mgoodman:

The leftmost LED that has a lightning sign above it would turn off when the unit is done charging. The three battery LEDs will be on long by then.

 

Charging takes a little while due to large battery, so best to leave your HiFi-M8 charging overnight. It will stop when it's done. No harm leaving it plugged in. It might top itself off every once in a while, just like a cell phone.

________________________________________________________________________________

 

Originally Posted by JoonBug View Post

I've a few questions for Michael after having used my M8 for a few hours: (I've got the 4-pin XLR iDevice unit)

1. How long did you find the M8 takes to charge from a 110V outlet?
-mgoodman-- Likely as long as it takes to discharge, so consider 6 hrs as a guideline. It might go faster. We are still collecting data.

2. The 1/8" combo optical jack shines red (presumably the optical signal?) all the time (that the M8 is on). Is that normal??
-mgoodman-- Yes, normal and safe, no reason for alarm. Just don't stare at it for a long time. Don't stare at any other bright lights either wink.gif

3. There seems to be a little "click" when I change the M8 to a different mode (iDevice to USB input, iDevice to power off, USB input to iDevice, etc.) Is that the sound of something frying?
-mgoodman-- We have to turn the circuit off and then back on again when we switch modes, so the unit actually turns off for a moment. That produces a click. I recommend taking the headphones off your head when switching modes.

4. My included short 30pin cable didn't seem to connect for some reason... I tried a regular stock Apple 30pin to USB cable and it connected to my old iPod touch just fine. Is the CEntrance cable particularly finnicky?
(Honestly if it turns out the cable has some kind of defect, whatever.
-mgoodman-- This is not normal. Our cable is fine. Please talk to Stacie about that.

 

___________________________________________________________________________

 

!!!!NOTE: it seems Centrance no longer includes the short 30pin LOD cable for idevices (June 2014).

 

__________________________________________________________________________________

 

via ButtUglyJeff

 

So far, in my limited research, these are the LX compatible DAPs:

 

AK100 & AK120

DX100 (HDP-R10)

and in a limited fashion the IHIFI960

 

Android phones also have limited capabilities, depending on flavor and app used...

 

__________________________________________________________________________

 

*Via Buttuglyjeff

 

iMac - all the HiFi-M8s will work with iMacs, no drivers required, via USB.  You will need to check and see if your iMac has Toslink in the headphone port like most Mac laptops do, if you want to use optical input on the LX models.  But, since you can use USB, I consider it a non-issue.

 

iPod Classic - there isn't a 160gb stock Classic that won't work with the M8.  I'm not sure how you are shopping for your iPod, but be careful of modded iPods.  Many are older models (like 5th or 5.5 gen) that had bigger hard drives added.  Avoid those just because they won't work with the HiFi-M8.  Now for the bad news.  24/96 support for iDevices isn't out yet.  CEntrance is still promising its in the works, but not yet.  More bad news.  I'm quite sure iPod Classics will never be able to play more then 16/48 files without down sampling.  That's is merely my opinion/assumption at this point.  CEntrance has made a release yet, so we are all in the dark.  I just believe that you'll need to run IOS7 to make higher sample rates possible, and Classics run their own unique firmware, not any IOS.

 

Nexus 5 - I'm not sure if any members confirmed success with the Nexus 5, but considering its the purest form of Android, without the phone manufacturer adding their own garbage, I would expect it would run fine through the USB A port, which is in all HiFi-M8s.

 

I'm just going to throw this out there.  ExpactinJapan has succeeded in playing up to 24/192 with Flac Player App from 2 different IOS7 devices, a 5th gen iPod Touch, and an iPhone 4 (24/96 tested) I believe.  He's using the Camera Connection Kit (CCK), into USB A, which is the same port you will use with your iMac and Nexus 5.  USB A is on all models of the HiFi-M8.  Depending on you library size, maybe you can go iPod Touch instead?

 

 

up to pg 21 impre/ pag

 
post #5157 of 5157

Wow…I'm glad I asked! :smile:

 

Thanks to all who responded. Information is power (especially when talking about gain switches :p).

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