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iBasso D7 and senheiser HD 650

Discussion in 'Headphones (full-size)' started by dagum, Apr 2, 2012.
  1. dagum
    I read the senheiser hd 650 need a good amp. I'd like to know if my iBasso D7 will be enough to drive theses cans.
    Thanks a lot.
  2. dagum
    No one tried this combo ?
  3. telecaster
    In low cost amplifier, I would buy a CMOY amp from ebay to drive HD650.
  4. dagum
    Thanks for the answer.
    I already have the iBasso D7. I'm looking for a new pair of cans. I'm trying to choose between the HD650 or the D5000.
    If the iBasso can drive the HD650, I will buy it. If not, I will choose the D5000.
  5. andychen
    I don't understand all the science behind this, but a portable amp is just lacking in its performance. This is based on the comparison between my $250 ibasso D6 and $150 Little Dot I+. Ibasso D6 is a much newer product as well, and supposed to be more powerful than D7. LD I+ just blows away ibasso D6.  So I believe D7 cannot drive HD650 to its full potential, but if you think 80% of the full potential of HD650 is good enough to you, then you are all set. 
  6. dagum
    Thanks for your answers.
    So, what would be better : a d5000 or 80% of a HD650 ?
  7. skamp
    The problem is that iBasso doesn't give any relevant specs for the D7.
  8. ProtegeManiac Contributor


    The D7 won't drive it properly, not simply because it's a portable amp, but because unlike portable amps that have a 9v or better battery it uses the 5v that USB gives it. What the D7 is, basically, is a lot like the uDAC except you get fixed analog line level output, unlike the NuForce which goes through the potentiometer, so essentially it's a preamp output. Which means that, either way, you might have to get another amp to drive either headphone, but the D7 is great to start with - it can serve as a DAC for the stronger amp and hungrier headphones at home and also provide transportable DAC-Amp for your laptop.
  9. dagum
    I asked iBasso about the HD650 and the D7's specs :
    Thank you for your email.
    The HD650 is 300ohm.
    The D7 can drive it. The output power of the D7 is 165mW+165mW into 32ohm."
    What do you think of that ?
  10. nicholars
    The D5000 will benifit from a good amp almost as much anyway.... Either of those headphones will sound much better out of a good amp or quite a bit worse out of a cheap portable amp.
  11. skamp

    The problem is that it still doesn't say how much power it can ouput into a 300 ohm load. The HD 650 have a sensitivity of 97 dB/mW and require 20 mW to reach a SPL of 110 dB, which isn't excessive. It's well in the realm of possibility that the D7 can drive the HD 650.

    I'd say get the HD 650s if you like them better than the Denon AH-D5000. At worse, you can probably return them?
  12. ProtegeManiac Contributor


    If the power halves as impedance doubles, that leaves you with approximately less than 10mW+10mW into 300ohm. Enough to get loud enough, question is 1) is that loud enough for you and/or 2) would that leave enough headroom.
    Personally I'd take the HD650 now and get a more powerful amp like the Schiit Asgard later. Or just get a good IEM and stick with that.
  13. dagum
    Thanks for all your answers.
    I will buy the HD650 and a better desktop amp later.
  14. telecaster
    Yeah HD650 now and La Figaro 332C later!
  15. kenji458
    I too had asked iBasso about the output power and the answer received was: 17.5mW into 300ohm
    Or you can just add an dedicated amp, like the P4 to the D7 later on for higher impedance headphones.

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