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post #91 of 227
Just ensure that you don't push the signal/amp/etc into clipping by applying too much boost to a given band. If that makes sense.
post #92 of 227
Thread Starter 
Quote:
Originally Posted by obobskivich View Post

Just ensure that you don't push the signal/amp/etc into clipping by applying too much boost to a given band. If that makes sense.

 

Agree.

Push the master down if thats the case.

post #93 of 227
Quote:
Originally Posted by proton007 View Post

 

Agree.

Push the master down if thats the case.

master volume from the source ?

eg. the Windows Media player volume or the source device ?

post #94 of 227
Quote:
Originally Posted by JohnSantana View Post

master volume from the source ?

eg. the Windows Media player volume or the source device ?

I believe he's talking about the master on the equalizer.

 

Like if you get clipping, bump down all the bands. Ideally you want the highest band at 0db gain.

 

EDIT: Although I'm guessing that's not possible with the preset button on the Fiio's.


Edited by chewy4 - 10/14/12 at 4:46pm
post #95 of 227
Quote:
Originally Posted by chewy4 View Post

I believe he's talking about the master on the equalizer.

 

Like if you get clipping, bump down all the bands. Ideally you want the highest band at 0db gain.

 

EDIT: Although I'm guessing that's not possible with the preset button on the Fiio's.

Yes you are right Chewy,

in my Fiio E11 I cannot see any option to bump it down ? apart from volume knob and the 0 1 2 equalizer preset switch and gain switch.

post #96 of 227

Isn't the Fiio EQ just a bass boost?

 

Either way it's designed to not go to clipping levels I would think, so I don't think you would have to worry about it there. You would just have to keep the bands on your software EQ lower if there is clipping.

post #97 of 227

        Hi All..

 

  Guys can you help me here.. ı bought a

Pioneer hdj 2000 headphone

  • Lightweight magnesium design
  • Protein leather surface with memory foam padding
  • Removable Mini XLR connector
  • 'i-hinge' design with 90° auto return
  • Type: Fully enclosed dynamic headphones
  • Frequency response: 5 Hz to 30,000 Hz
  • Impedance: 36 Ω
  • Sensitivity: 107 dB
  • Maximum power input: 3,500 mW
  • Driver units: 50 mm dome type
  • Cord: 1.2-m-long one-side connection coiled type (extended length 3 m)
  • Plug: 3.5 mm 3P mini-plug (gold-plated, threaded type)
  • Weight: 290 g (without cord)
  • Accessories: Carrying pouch, 6.3 mm 3P plug adaptor (gold-plated, threaded type)

 my problem is it sound like 10$ headphono when ı use my desctops onboar soundcard realtech output..Well ım now looking for an dac/amp for my headphone.Yesterday ı found Fiio e10 and ım thinking to buy it.But before that ı just want to be sure if it can fully drive my headphones cans.Iwill write dawn the specs of fiio e10

fiio e10

● Power supply: Standard MINI USB port
● Output Power: 150mW(32Ω)
● Sample rate USB decoder: 96KHz/24 Bit (Maximum support)
● Coaxial output: Stereo PCM
● Frequency response: 20Hz~20KHz
● Suitable Headphone Impedance: 16Ω~300Ω
● Size: 79mm×49.1mm×21mm
● Weight: 82g

 

   So.. ı will ask this directly... Will ı be able to listen insanely high volumes without distortion with this fiio e10 dac/amp or not.... if not what would be your adviceses....

 

            Thank you all from now........

post #98 of 227

It should be OK, the low gain mode of the E10 is likely loud enough and is recommended.

post #99 of 227

Am I that deaf that I do not hear too huge differences between my Sansa Clip + (near zero Ohm) and the Behringer soundcard (50 Ohm) with a Sennheiser HD 205 II (32 Ohm)? 

post #100 of 227

The impedance of the HD205 II seems to be pretty flat so there should only be small frequency response differences.

post #101 of 227
Quote:
Originally Posted by JohnSantana View Post

in my Fiio E11 I cannot see any option to bump it down ? apart from volume knob and the 0 1 2 equalizer preset switch and gain switch.

 

The "EQ" on the FiiO E11 is an analog bass boost. If implemented properly, it should not clip unless you set the volume too high.

post #102 of 227
Hi xnor, thank you for your response!
It may explain a lot. Could you tell me how I could find out how flat the impedance is of any headphone? I also own some other headphones and I would like to know if I can use them too with higher impedance sources.
post #103 of 227
Quote:
Originally Posted by Ruben123 View Post

Could you tell me how I could find out how flat the impedance is of any headphone?

 

Check the impedance vs. frequency graphs at innerfidelity.com, headphone.com, doctorhead.ru, or goldenears.net. Interestingly, there are some inconsistencies between their measurements, perhaps not all of them measured the impedance while the headphone is on a dummy head (it does makes a difference).

 

You could also test it yourself, having a source of known high output impedance (or simply whatever you intend to drive the headphones with, to verify that there are no significant frequency response or distortion problems), a splitter, and a PC sound card.


Edited by stv014 - 10/29/12 at 6:31am
post #104 of 227

Can anyone help me decode these specifications:

 

ftp://209.222.7.36/pc/audio/ALC888_DataSheet_1.4.pdf

 

Headphone output @32 Ohms is given as 1Vrms. Analog power supply current is given as 51 mA. So, my guess is that 1*51 = 51 mW of available power @ 32 Ohms. Output impedance is 1 Ohm. @ 64 Ohms, output should be something like 26 mWs (assuming no additional voltage is compensating for impedance change). At 50 Ohms, which is my actual rated headphone impedance, the estimate would be about 29 mWs. 

 

I am getting new phones that are rated 35 Ohms, but have appeared to test at 50 Ohms. They are rated 93.4 Db, but unknown if @ 1 mW or 1 Volt RMS (current headset). To reach 110 Db, I would need 16.6 times the power, or, 16.6 mW.

 

I am finding that manufacturers really don't rate gear consistently. I have been trying to determine what my existing available wattage is, so I can make a better decision about how much I might need later from an amp upgrade.

 

The Schiit Asgard, for example, has THD + Noise of .1% @ 1 Vrms, but is rated to supply up to 20 Vs between loads of 8-600 Ohms. It is a known 1-watt or so amp, yet I can't figure this out based on their published specs.

post #105 of 227

I have just posted a reply related to this topic in the Computer Audio forum, so I also link it here: how to calculate power and SPL.

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