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Cypher Labs Theorem 720 DAC: A New Portable 24/192 USB/iDevice/Android DAC & Amp - Page 9

post #121 of 186
hi

I just got one Theorem but it doesn't work with my note2 (rooted xnote rom) I bought the Usb Audio Pro that is work but only with flacs and that thing is not even a proper player.
I tried many thing but I'm failed frown.gif
My phone worked before with the RSA Predator without any problem.
Btw compare with the predator this is a power house smily_headphones1.gif using with ie80 the hiss for me is not noticeable.

Any help highly appreciated.
Thanks in advance

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post #122 of 186
"For more information on Android devices and playback of high resolution files, click here to read more information about it on Cypher Labs' blog."

Anyone know what was at the link?
I tried but not responding not even faq.

Just so sad...
post #123 of 186
Cypherlabs website is not working at the moment.
post #124 of 186
Finally I got working with usb audio player pro. Such a great device!
Beautiful sound with my ie80 and hd650 too.
post #125 of 186

I received my theorem 720 a few days. Getting great results with a Sennheiser Momentum. What a step up from my JustAudio uha-120 and my two Ray Samuels, the Tomahawk and the Black Bird SR-71. Night and day difference. Can never go back to my older amps.

 

It is also miles better than the Astell & Kern 120. Not as portable, and not as pretty. But infinitely better sound in virtually all departments from dynamics to detail to extended bass etc.  I listen mostly to electronic music and classical.

 

Expensive, but worth it if you can afford it. 

post #126 of 186

Anyone tried Earsonics SM64 with Theorem - any hiss? Thanks.

post #127 of 186
Quote:
Originally Posted by Bopper29 View Post
 

Anyone tried Earsonics SM64 with Theorem - any hiss? Thanks.

 

No hiss.

post #128 of 186

Nice, thanks.

post #129 of 186
I am sorry , I can not upload pictures at the moment
Edited by rudi0504 - 1/15/14 at 6:33pm
post #130 of 186

pics not visible. bandwith problem

post #131 of 186

Anyone used the 720 with the Sure SE846 IEMs?

Any noticeable hiss?

post #132 of 186
Quote:
Originally Posted by IceClass View Post
 

Anyone used the 720 with the Sure SE846 IEMs?

Any noticeable hiss?

There is definitely a hiss when using it with the Sennheiser IE800. It's about the same level of hissing as the ALO Rx Mk3-B+ amp; although it might be just a tad bit quieter than the CLAS -dB -> ALO Rx Mk3-B+ combo with sensitive IEMs. Still, at least with the IE800, you get used to the hiss and it "melts" into the background after you get music playing for a little while to the point where you barely notice it at all. Even when watching YouTube videos and movies, the hiss is 100% tolerable but it does exist.

 

At first I tried to use impedance adapters to acquire a completely "black/quiet" background on my ALO Rx Mk3-B+ amp, but didn't like how it changed the sound, so I just got used to the (tolerable) hiss on the ALO amp where it doesn't bother me at all anymore. So far I'm really liking the sound of my Theorem 720 when connected to my laptop, as it sounds a little different than my CLAS -dB/ALO Rx Mk3-B+ stack (in a good way.) It seems to be a little more "fun" sounding than the combo, and I can keep the Theorem plugged into the charger when using it at my desk 24/7 without issues (because there are a bunch of issues w/ the stack, including some balanced interconnects being too long/big in the stack, thus preventing charging/access to the charge ports for the -dB/Mk3, and with the Mk3-B+, having some weird "ground hum" issue in the background in balanced back-end mode while charging the amp.)

 

With that said, I've been having some issues with my Theorem 720 so far, mostly having to do with my iPhone/portable use (since I was hoping to get the Theorem 720 to replace my Fostex HP-P1.) Sadly, when the Theorem 720 is connected to my iPhone 3GS, it picks up a ton of cellular network interference (buzzing/"grinding"/chirping/etc.) from my 3GS to an intolerable degree, to where the only way I'd be able to use my phone with the Theorem would be only in "Airplane Mode." This kind of makes the Theorem a bit "useless" for use with my 3GS, since I can't keep my phone in "Airplane Mode" when on-the-go. My 3GS doesn't have any interference issues whatsoever with my Fostex HP-P1, so I find this pretty odd honestly :(

 

I was thinking this issue might be specific to older iPhones (my 3GS), and that maybe an iPhone 4S would be "shielded" better and wouldn't have this cellular network/RF/etc interference issue w/ the Theorem 720? I've been considering maybe picking up a used 4S (64gb) from Amazon if this is the case, so that I can use the phone with the Theorem 720 (and other CLAS devices) without this major RF interference problem.... I did notice recently even before I purchased the Theorem 720 that whenever I placed my 3GS/HP-P1 stack close to my CLAS -dB/ALO Rx Mk3-B+ combo (while listening to my CLAS -dB from my laptop on my desk), I would get some mild buzzing/interference whenever the phone was communicating with the cellular network (such as push notifications), which I initially found very weird too (since CLAS -dB is supposed to be used w/ iPhones specifically), which is why I have to keep my 3GS further away from my CLAS gear on my desk now.


Edited by refault - 1/25/14 at 5:47am
post #133 of 186
I also hear the interference but since I only use with an iPod Classic it's not a problem for me, Cypher really shouldn't market this for use with cell phones though.

That last photo in the post above is mine, and I can say that it doesn't put nearly as much pressure on the headphone cable as that photo may imply. The cables do touch but there's really no pressure.

Given the drawbacks the Theorem isn't for everyone, but if it suits your needs it sounds fantastic. I use from a computer or iPod Classic driving full size headphones so it's perfect for me.
post #134 of 186
Quote:
Originally Posted by IceClass View Post
 

Anyone used the 720 with the Sure SE846 IEMs?

Any noticeable hiss?

 

Their new Duet is supposed to be a much quieter amp, then the Theorem's amp section...

post #135 of 186

Does anyone know if the hissing sound has been or will be addressed?

I solely use IEM thus deal breaker for me.

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