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Re: AvantGrand Headphone volume
altrent #1882651 04/19/12 08:31 PM
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Originally Posted by altrent
Without the headphones, volume at 3pm is plenty satisfying.


Yes, I would say exactly the same so I reckon the headphone stage is relatively quiet on the AG.


C. Bechstein Model B | Roland RD-1000 | Kawai VPC1
Re: AvantGrand Headphone volume
altrent #1882695 04/19/12 10:07 PM
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Originally Posted by altrent
Greg, thanks for the maths - even if I don't understand it. laugh


You're welcome smile

Quote
Wouldn't be correct to say, at constant ouput impedance, an headphone with lower impedance is going to be louder than an headphone with higher impedance?


No. As I showed before, it depends on what the output impedance actually is, and also what the sensitivity of the headphones is.

I contacted Yamaha, and the output impedance of the N1/N2/N3 is approximately 33 ohms.

I've calculated the relative loudness of all headphones mentioned so far in this thread except for the Phillips (can't find the sensitivity specs) taking into account the 33 ohm output impedance. I used the headphone.com measurement for the AH-D2000. The DT770 Pro, HD650, and AKG K701 are all pracitally identical. The Denon AH-D2000 is 4.4dB louder, and the HD-598 is the loudest, being 2.3dB louder again than the Denon. To get an idea for what these dB figures represent in terms of how loud it actually feels to humans, a 3dB increase is about 23% louder, 6dB = 50%, and 10dB = 100% (twice as loud). Note that all this is very approximate - the overall loudness will also depend on the frequency response of the headphones, and I have not made any attempt to account for that.

Quote

Originally Posted by sullivang
Good headphone amps can be bought very cheaply now.

Such as?


FiiO make pretty good stuff that doesn't cost a lot. For your AH-D2000, I'd look at something like the E6 (it won't be able to drive some of the other models mentioned very loudly, but it should be loud enough for the Denon I think).

Greg.

Last edited by sullivang; 04/19/12 10:12 PM.
Re: AvantGrand Headphone volume
altrent #1882696 04/19/12 10:07 PM
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I ran into the same problem with the Roland FP-7F when paired with the AKG 240s. My solution was to use a headphone amp.

Re: AvantGrand Headphone volume
altrent #1882768 04/20/12 03:14 AM
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I must have good hearing. To me it quickly starts to become painful when playing with headphones. It's like certain frequencies are ringing in my head and I cringe every time. It really kind of hurts. The only thing I can do then is lower the volume.

Re: AvantGrand Headphone volume
sullivang #1882807 04/20/12 05:32 AM
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Originally Posted by sullivang
I've calculated the relative loudness of all headphones mentioned so far in this thread except for the Phillips


Thanks Greg.

The Philips are 32 ohm with input sensitivity of 104 dB. And they are significantly louder than BD and AKG. I couldn't listen to the Philips at maximum volume for long, although they are not ear-splitting as such.


C. Bechstein Model B | Roland RD-1000 | Kawai VPC1
Re: AvantGrand Headphone volume
EssBrace #1882830 04/20/12 06:37 AM
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Originally Posted by EssBrace

The Philips are 32 ohm with input sensitivity of 104 dB.


That must be 104 dB/mW, because if it were dB/V, they would be the quietest out of all of them. wink Assuming dB/mW, they are about 5dB louder than the HD598. (so yes, the loudest headphones here by a healthy margin)

Greg.

Re: AvantGrand Headphone volume
altrent #1883163 04/20/12 05:50 PM
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I wish I had your understanding of this stuff!


C. Bechstein Model B | Roland RD-1000 | Kawai VPC1
Re: AvantGrand Headphone volume
altrent #1883173 04/20/12 06:03 PM
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These links might help:
http://nwavguy.blogspot.com.au/2011/09/more-power.html
http://nwavguy.blogspot.com.au/2011/02/headphone-amp-impedance.html

Unfortunately we don't yet know how much voltage & current the AvantGrand puts out, so we can't make any estimates of the actual sound level that any given headphones will produce.

Greg.

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