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Cypher Labs Theorem 720

Discussion in 'Portable Headphone Amps' started by drsheep, Sep 3, 2013.
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  1. refault
    Mids sound a lot more lush/detailed in a sense (less "distant" sounding) than the CLAS -dB + ALO Rx Mk3-B+ combo (in balanced back-end mode) using the IE800, but that is just my intiial impressions/comparison so far. I was actually quite surprised at how "small" the Theorem 720 actually is (it seems less "fat" in terms of horizontal width than the Fostex HP-P1 or CLAS/ALO, although a bit longer than both the Fostex and original CLAS), it seems it might be slightly more "pocketable" (or at least easier to handle in portable-use situations) than the Fostex HP-P1 even.
    The background "hiss" with the IE800 still exists as on the CLAS -dB + ALO Rx Mk3-B+ combo, but it's completely tolerable and I don't mind it. I'd say that the levels of hiss on both the Rx Mk3-B+ and Theorem 720 w/ the IE800 are just about the same, but disappears/is easy to ignore once you have music playing (even during "quiet" passages.)
  2. refault
    The only major "issue" I have so far when using the Theorem 720 w/ my iPhone 3GS is that it tends to pick up cellular interference quite a bit while in use... the Fostex HP-P1 that I've used has never exhibited any issues like this when it comes to cellular/RF/etc interference, so it's quite irritating for use with an iPhone at this point. I was wondering if there are any ways to reduce the RF/cellular interference without having to turn 3G off/"airplane mode" when listening to the Theorem 720?
  3. Ultrainferno
    Mine picks up a lot of radio frequency too from phones in the train. I love the Theorem but the hiss, channel imbalance and this rf problem shouldn't happen in a product of this class
  4. IceClass
    And it's not available in silver!
  5. deltasun
    I'm really interested in purchasing the Theorem 720. Where's the best place to purchase and do these ever go on any kind of sale?
  6. TheAnderman

    I just got mine last week from Todd the Vinyl Junkie. They shipped it hours after I placed my order and even upgraded my shipping for free!

    I have seen a demo model for sale for $650, but I've never seen them on sale before.

    Check out TTVJ: http://www.ttvjaudio.com/Cypher_Labs_Theorem_720_DAC_Headphone_Amplifier_p/cyp0000014.htm
  7. deltasun
    ^^ Thanks, I was afraid of that. :D
  8. rudi0504

    Last week I saw moon audio got promotion all cypher labs product discount 10%
    Please send email to moon audio , maybe you can get the 10 % discount now
    Good luck

    One last day of Cypher Labs 10% off sale....for the Algorhythm Solo -R, -dB and Theorem 720 Headphone amp/dac....
  9. deltasun

    Thanks, Rudi...looks like the Theorem 720 sale is over. I might still ping them if I decide to go with this in the next few.
  10. purpleom

    Hi, guys!

    I want to order Theorem 720 DAC Headphone Amplifier (Copper). So I would really appreciate it if you could help me to find the answer to 3 questions.

    1. Does Theorem 720 DAC Headphone Amplifier (Copper) bypass the iPod’s amp and dac?

    2. Do I have to buy a line out dock (LOD) cable if I want to use 720 DAC Headphone Amplifier (Copper) with iPod Classic which has 30 pin connector or LOD cable is included in the package contents? What LOD cable can you recommend?

    3. Will my Shure SE535 earphones sound good with Theorem?



  11. Ultrainferno
    1. that's the whole point
    2. It's in the box
    3. If they're not sensitive iems
  12. midnightwalker
    It has hiss but soft and small so it doesn't bother me much. If you want to find a better amp dedicated to the IEMs, take the DUET instead.
  13. rudi0504
    My simple audiophile sound quality set Up For night listening

    Source : iPhone 5s US version
    Dac / Amp : Cypherlabs Theorem 720 Copper
    Headphone : Audeze LCD 3
    Cable : LCD 3 With Stephan Audio Art 4 Pin Balanace
    Adapter 4 Pin Female To rsa balance
    Lightning to mini USB Stock from Cypher Labs
    Music : WAV file

  14. redstar
    Has anybody tried this with the;
    Beyer T5p
  15. rudi0504

    I have T 5 p and LCD 2 rev 3 and LCD 3
    I heard LCD X demo unit

    Theorem can drive LCD 3 , that can drive T5p and LCD X in very good sound quality .
    LCD X is very easy to drive headphone , it is easier to drive than LCD 3
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