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The Centrance HiFi M8 thread - Page 276

post #4126 of 5057
I started a faqs on the hifim8 impressions thread page two, but it kinda fizzled out due to lack of interest.

Impedance is 11,2,1 from left.
post #4127 of 5057
I'm glad that's sorted. Thanks Jude. Maybe this info should be added the first post of both M8 threads. Unfortunately, I think this question will come up again, at least until it's printed on a diagram/manual/guide that ships with the M8.
post #4128 of 5057
LOL expat beat me to the punch! Nice job. Good if this information is on there
post #4129 of 5057
I only run one thread, this thread first op page is done by someone else but i got them to copy and paste the first page from my thread to here.

-////--/

In other news....

qehyhu7a.jpg
Edited by ExpatinJapan - 12/16/13 at 12:48pm
post #4130 of 5057

I didn't meant to make a big deal of it.  Looking back my tone does sound offensive.  Just after a long day and I didn't type the necessary words to make it look less offensive.  If that is what Michael Goodman said then I will take him for its since he is the creator lol.  Hope nobody get too upset about this.  Just trying to inform with the best of my knowledge.

post #4131 of 5057
Kokushu, no offense taken on my part, btw. I'm just also trying to share to the best of my knowledge as well, in the spirit of everyone here getting the correct info. Ultimately that's what happened, so it's all good!

We're all friends here ....smily_headphones1.gif
post #4132 of 5057
Yeah, we all only found out about the right settings about a month ago ourselves smily_headphones1.gif

I emailed Michael at Centrance around that time to confirm.

Luckily my hifi m8 was always set at 2ohm!
post #4133 of 5057

So what is the best way to calculate the best impedance setting? Divide by 8? 

 

For example my Audeze LCD-3s have a impedance of 45 Ω. 

 

45/8= 5.625.

 

So do I set the switch it at 2 Ω  for the best match?

 

It basically sounds great no matter where the Ω switch is set for me, so I'd like to know what the optimal setting would be. 

post #4134 of 5057

I keep most thing at 2 since that what sound good to me.  I mostly use full size headphone and hadn't try any iem with it.

post #4135 of 5057
i am one of the many who were confused with the impedance swith for a while. my observation was it is louder on the right most position, therefore, highest impedane should be on the right position. WRONG. tongue.gif
i mixed up my expectation between gain & impedance. impedance here for hifim8 is the internal impedance of the output. therefore, the higher the impedance, the lesser power(volume) & vice versa.
post #4136 of 5057
I run mine at 1 90% of the time. My theory is, the greater the damping factor, the better the driver control. The sound to me bears this out to some degree. Difference is minimal with the headphones I'm using so laziness is also a factor. When I had the HD650, I used 11 more frequently as it sounded, ah, a bit more gentle for lack of a better way to put it. BB King to Stevie Ray maybe.
post #4137 of 5057
Quote:
Originally Posted by phototristan View Post

So what is the best way to calculate the best impedance setting? Divide by 8? 

For example my Audeze LCD-3s have a impedance of 45 Ω. 

45/8= 5.625.

So do I set the switch it at 2 Ω  for the best match?

It basically sounds great no matter where the Ω switch is set for me, so I'd like to know what the optimal setting would be. 

Your formula up there would cause more confusion. Just divide the phone's load impedance with the amp's output impedance and the resulting value should be 8 or greater.

In the case of LCD3, set the output impedance of M8 to 1 or 2. If you use 11 then the ratio will be below 8.
post #4138 of 5057
While we are on the subject...is there a technical reason to ever choose a higher output impedance if a lower one is available on the same amp? I understand there may be a sound preference for the listener. The 8x rule seems to be expressed as "at least 8 times" which suggests that lower output impedance is better, which has to do with damping factor and frequency response stability, from what I have read and what I know. What else is there to consider? Perhaps current limiting in the amp? Maybe battery life for a portable amp?
post #4139 of 5057

Just an FYI, I found the perfect case for my HiFi M8 that holds my rig with iPod attached:

 

 

 

It can zip up fine with the USB cable attached and protects it from damage/dust etc.  It even has storage pockets for other small items. 

 

It's a case from an old PDA called a Psion (from the '90s) that I had lying around, fake leather.

 

You can sometimes still find these on eBay if you search "Psion Case": http://www.ebay.com/sch/i.html?_trksid=p3984.m570.l1313.TR0.TRC0.Xpsion+case&_nkw=psion+case&_sacat=0&_from=R40

post #4140 of 5057
Quote:
Originally Posted by jazzman7 View Post

Maybe battery life for a portable amp?

 



This is a guess on my part but the HiFi M8 runs in Class A (at least at the level I listen to) - yes it runs quite warm - so if you mean how long the thing will play on a charge the impedance setting should not make a difference. (Battery life according to M. Goodman was something around 4 years if I recall correctly. With the exception of the Stax headphones I have not kept a product anything like 4 years)

Let me know if my assumption is wrong.
P.
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