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Topping A30 + Sennheiser HD 600


Is Topping A30 able to run HD 600 (to drive it at it's full potential)?

  1. Yes

  2. No

    0 vote(s)
  1. snee

    First of all - sorry form my bad English, I hope that you will be able to understand me. :)

    I want to buy Sennheiser HD 600 headphones. Also, I'm interested in Topping A30 but I'm not sure how HD 600 will work with it.

    The reason I'm considering buying Topping A30 is because in many reviews it is stated that it has a neutral and balanced sound. As stated here:
    This is important to me because I'm planning to use my HD 600 headphones for some basic mixing/fixing. I also considered Schiit Magni 3 which is recommended by many, but I read on various websites/forums that it has "colored sound".

    My question:

    Is Topping A30 able to run HD 600 (to drive it at it's full potential)?

    I am noob when it comes to this stuff and correct me if I'm wrong, but according to the specs (if I understand them well :)) - A30 should be able to run HD 600 (to drive it at it's full potential):

    Sennheiser HD 600:

    Impedance average in band from 40 Hz to 15 kHz: 352,2 Ω

    Impedance Versus Frequency (goes from 300 up to 560 Ω):


    Power Required: 199 mW [source]
    Current Required: 26 ma
    Voltage Required: 7.74v rms

    Topping A30 - Maximum output power::

    1551mW x 2 (PO = Hi, 6.35 output, RL = 32Ω, THD + N = 1%)
    291mW x 2 (PO = Hi, 6.35 output, RL = 300Ω, THD + N = 1%)
    152mW x 2 (PO = Hi, 6.35 output, RL = 600Ω, THD + N = 1%)

    Maximum output voltage swing: 26.6Vpp

    Output impedance: 10 Ω (6.35 mm output)​
    Last edited: Apr 4, 2018
  2. yong_shun
    Do you have a DAC?
  3. snee
    No, I plan to use only Headphone AMP (because of this).
  4. snee
    It is interesting that on their website there is this:
    ... but also on their website they recommend AliExpress stores that specified the following Recommended Headphone Maximum Impedances:

    HIFI College Store and Shenzhenaudio Store: 251-300 Ohm
    Aoshida-HIFI Audio Store: 101-150 Ohm

    Last edited: Apr 4, 2018
  5. buke9
    If it does 291mw@300 ohms you should be good at running them.
  6. yong_shun
    You can check this post by JDS Lab. It is informative. No rocket science but simple calculation :)
    snee likes this.
  7. snee
    What about impedance spikes in the lower frequencies? They go up to 560 Ω - does this mean that A30 will have trouble to handle the lower frequencies? Or maybe I completely misunderstand that :)
  8. buke9
    At what gain and impedance setting are you referring to?
  9. Oscar-HiFi
    A30 drives the HD600 fine. Although I personally like them with an OTL tube amp.
  10. snee
    Hmm, I'm not sure if I understood you well... is this question is related to impedance spikes in the lower frequencies? Or settings on headphone AMP?

    As for Topping A30 + HD 600, I guess that I will need to set the power switch to "Hi", and not sure about the gain selector but first I would start with "0 dB". Also, I would use 6.3mm output (output impedance is 10 ohms).
  11. Oscar-HiFi
    Yes high power + 0dB gain + 6.3mm socket will be great with the HD600.
    snee likes this.
  12. snee
  13. Bhargu
    The listing you copied already shows Vpp at 26.6 V, right? That puts Vrms at arout 9+ volts. You can use any Ohm's law calculator to calculate current, if you want it.

    Edit: An Ohm's law calculator will calculate both Vrms and current for you if you provide impedance and power.
    Last edited: May 12, 2018

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