Head-Fi.org › Forums › Equipment Forums › Portable Source Gear › The Centrance HiFi M8 thread
New Posts  All Forums:Forum Nav:

The Centrance HiFi M8 thread - Page 62

post #916 of 5048
Quote:
Originally Posted by Armaegis View Post

Though on a plane, a lot of that final edge in fidelity is really pointless as you won't hear it over the engine noise anyways. Not unless you're using iems with earmuffs on top. 

Maybe on a plane but not.....well pretty much everywhere else.
post #917 of 5048
Quote:
Originally Posted by eron View Post

If anyone has the need to voice or vote on the battery, SQ level, please go to the survey link below. Centrance has access to the resulting spreadsheet.


pretty cool that Centrance is taking our feedback onboard.

 

ps I believe other companies who offer DAC and amp combos have 4 or 5 hour battery life

post #918 of 5048
Quote:
Originally Posted by Armaegis View Post

Though on a plane, a lot of that final edge in fidelity is really pointless as you won't hear it over the engine noise anyways. Not unless you're using iems with earmuffs on top. 


Also on a plane, remember to knock an hour of listening time off of the flight time for take off and landing time when "the use of personal electronic devices is not allowed".

post #919 of 5048
Quote:
Originally Posted by Armaegis View Post

Though on a plane, a lot of that final edge in fidelity is really pointless as you won't hear it over the engine noise anyways. Not unless you're using iems with earmuffs on top. 

 

Not sure what you are using on planes. For me, once the Miracles go in, 95% of all outside noise goes away WITHOUT any sound turned on yet. Once the music starts its 100% isolation.

Any plane ride for me is minimum 5.5 hours. I usually start listening almost right away (shhhh before the seat belt sign is turned off). 6-8 hours is minimum FOR ME. Hey if it turns out to be only 4 then I'll just pass. No problem, its not life or death LOL. I do believe outside of the most hardcore buyers, 4 hours is not going to appeal, therefore not a lot of HIFI M8s will be sold.

Centrance has got to take cost of scale into account when pricing. I could be all wrong though......again no big deal its only Rock n Roll.

post #920 of 5048
Quote:
Originally Posted by Saraguie View Post

.again no big deal its only Rock n Roll.
....but I like it.
post #921 of 5048
Quote:
Originally Posted by gidion27 View Post


pretty cool that Centrance is taking our feedback onboard.

 

ps I believe other companies who offer DAC and amp combos have 4 or 5 hour battery life

 

I'm getting just about 8 with the Fostex HP-P1. As my friend Expatin said, "looking for the M8 to completely destroy it." 


Edited by Saraguie - 12/14/12 at 3:58pm
post #922 of 5048

Quote:

Originally Posted by Saraguie View Post

.again no big deal its only Rock n Roll.
Quote:
Originally Posted by ExpatinJapan View Post

....but I like it.

 

LOL, I understand they sang it the other night!

post #923 of 5048
Quote:
Originally Posted by Saraguie View Post

 

Not sure what you are using on planes. For me, once the Miracles go in, 95% of all outside noise goes away WITHOUT any sound turned on yet. Once the music starts its 100% isolation.

 

 

Well yeah if you're using customs, the level of attenuation is going be be a fair shake higher than typical headphones or iems... no argument here.  

post #924 of 5048
One thing that has grown on me is the look of the case. It seems like it made for a phone or other source to sit in the valley on top. Likewise, a battery pack could nestle underneath as well.

So Michael, if I ran USB digital from a non apple device, could I also use the other USB port for charging from an external battery pack? I forget if you answered this already.
post #925 of 5048

Hey guys, the amount of feedback is overwhelming (in a good way). I've only been away from the thread a day it seems and there are four new pages to read :)

 

Thank you very much for the passionate conversation. I understand that this crowd votes in the majority for SQ and in the minority for long battery life (oops, I may have just offended some people - sorry!).

 

I see that the 5-hour mark is the "magic barrier" for many people. It's partly psychological, partly convenience-based, partly based on the fact that so many of us spend much time on the long plane ride. I got all the feedback -- thank you again. Let me share a bit of the philosophy in an attempt to calm those dissenting voices out there...


- We are re-using the DACmini headphone amp in the M8, so there will be plenty of output power. The DACmini headphone amp is Class-A, which means that it consumes about the same amount of power constantly, whether it actually plays music into headphones or not. This Class-A topology is what gives it the best possible linearity and lowest distortion, but alas, comes with the penalty of increased power draw.

 

- We will not replace the headphone amp. I confess -- we tried to go for a "portable", "battery-friendly" topology and that's what we have shown at RMAF. People voiced their opinions clearly and definitively: "Need more power". So, there will be no compromises in that department. This is why spec-wise there will be almost a 10x difference in power output between M8 and those "sane", "battery-friendly" devices out there. Call me insane, but I'm choosing SQ. I submit this is bordering marketing suicide, but then again, this is not your typical market :)

 

- As far as the opamps are concerned, we have already found something that "feels" about the same, but adds a whole extra hour to the battery. But we need to do more listening to see if SQ is actually, truly the same. If not, we will go back to the original ones and find places to optimize the power consumption elsewhere. We are nowhere near done "scrubbing". As a matter of fact, I'm quite happy that the entire product is now alive in front of us, which allows us to attack the "total device", square-inch-by-square-inch.

 

- Changes will only be made in those areas where there exists blatant, unnecessary fat (read: "sub-optimal design decisions"). We will not compromise on the SQ, so don't worry. I'm ready to take the hit (and, alas, public ridicule) on the subject of battery life in order to satisfy those who need the best possible sound on the go. Having said that, again, we are not done fighting...

 

---

 

- Regarding yesterday's question about a PMP device with a USB "Output". I don't know of a device like that because in order to offer "USB output" rather than input, the device pretty much needs to be a full-fledged computer. Most PMPs out there are not a computer, but rather a peripheral device for a computer, even though many are running an OS internally. It seems that a $300 laptop (heck, a $250 laptop) would do just fine, although yes, it would be larger than a PMP.

 

---
 

- Regarding charging the iDevice. We are not planning to give any of our own power away. We will only charge the iDevice when M8 is plugged into the wall. We will NOT charge the iDevice when M8 is running off its internal battery.

 

---
 

- Regarding using the USB input for charging the M8 and using a laptop at the same time. Only the USB input that's labelled USB (the squarish USB-B connector) can be used for charging the M8 from the outside. It's the larger USB jack on the left, the one that the laptop connects to. You can charge the M8 from the computer like you could charge your phone.

 

The second USB jack (the rectangular USB-A connector) is used for connecting to an iDevice and charging the iDevice. This jack actually moves power in the opposite direction -- from the M8 to the iDevice, so you cannot use this jack to charge the M8 (it's a source of power, not a receiver of power).

 

I suggest that you use the squarish USB jack for USB audio (laptop) and the external power jack for charging. Then, an external battery pack with the appropriate round plug would be a great way to recharge the unit or extend battery life. Those companies like Energizer, Eneloop, etc., are proficient at battery management and volume-based cost management, so we might as well know that we can rely on them for those extra-long flights or extended listening sessions.

 

CEntrance will not attempt to be Energizer. CEntrance will deliver SQ, then battery life. In that order.


Edited by mgoodman - 12/14/12 at 9:40pm
post #926 of 5048
Quote:
Originally Posted by mgoodman View Post

--

 

- Regarding charging the iDevice. We are not planning to give any of our own power away. We will only charge the iDevice when M8 is plugged into the wall. We will NOT charge the iDevice when M8 is running off its internal battery.

 

 

---
 

- CEntrance will not try to be Energizer. CEntrance will deliver SQ, then battery life. In that order.

Yew R teh Awesum!

post #927 of 5048
Quote:
Originally Posted by mgoodman View Post

- Regarding using the USB input for charging the M8 and using a laptop at the same time. Only the USB input that's labelled USB (the squarish USB-B connector) can be used for charging the M8 from the outside. It's the larger USB jack on the left, the one that the laptop connects to. The second USB Jack (the rectangular USB-A connector) is actually used to move power in the opposite direction -- from the M8 to the iDevice, so you cannot use this jack it for charging the M8 (it's a source of power, not a receptacle of power).

I suggest that you use the squarish USB jack for USB audio (laptop) and the external power jack for charging. Then, an external battery pack with the appropriate round plug would be a great way to recharge the unit or extend battery life. Those companies like Energizer, Eneloop, etc., are proficient at battery management and volume-based cost management, so we might as well know that we can rely on them for those extra-long flights or extended listening sessions.

doesnt the square usb jack provide power as well as the data?
so for those who will be mostly plugging the m8 into their laptop/computers, the m8 will be constantly charging, so is there a solution?
i may be confusing myself
post #928 of 5048

Thanks for mgoodman.  Sounds like the best way to go.  

post #929 of 5048
Quote:
Originally Posted by mgoodman View Post
---
 

- Regarding using the USB input for charging the M8 and using a laptop at the same time. Only the USB input that's labelled USB (the squarish USB-B connector) can be used for charging the M8 from the outside. It's the larger USB jack on the left, the one that the laptop connects to.

 

The second USB Jack (the rectangular USB-A connector) is actually used to move power in the opposite direction -- from the M8 to the iDevice, so you cannot use this jack it for charging the M8 (it's a source of power, not a receptacle of power).

 

I suggest that you use the squarish USB jack for USB audio (laptop) and the external power jack for charging. Then, an external battery pack with the appropriate round plug would be a great way to recharge the unit or extend battery life. Those companies like Energizer, Eneloop, etc., are proficient at battery management and volume-based cost management, so we might as well know that we can rely on them for those extra-long flights or extended listening sessions.

 

My external battery pack has a rectangle USB-A connector, so I could probably use a cable like this for charging the hifi-m8 on the go via External Battery?  

http://www.amazon.co.jp/gp/product/B0036SGFH0/ref=ox_sc_sfl_title_8?ie=UTF8&smid=AN1VRQENFRJN5

 

Would it also be ok to use the same type of cable connected to say a iphone charge block to charge the Hifi-m8 from a wall outlet?

 

What cables will be included with the Hifi-m8 for charging and other useful things (of course the idevice to usb is listed on your site with a picture). 

 

Thanks.

post #930 of 5048
Thankfully it's sq first then batt life. If its the other way round, I will get a pico slim and call it a day.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Portable Source Gear
Head-Fi.org › Forums › Equipment Forums › Portable Source Gear › The Centrance HiFi M8 thread