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Ohm value
#2996915 06/30/20 03:44 AM
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So with my AvantGrand N1X due to arrive in a couple days' time, I feel like getting a pair of new open back headphones to go with it since I am not satisfied with my current closed back ones due either to comfort or sound quality.

I've decided that I want to give Beyerdynamic a try and I am looking at the DT-990 Pro. But there are different ohm values, and I believe the ones available are 32, 80 and 250?

Anybody can advise which value is best suited for the N1X?


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Re: Ohm value
Beowulf #2996917 06/30/20 03:51 AM
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I don’t have experience with Beyers but I own HD650 (300 ohm) and HD-595 (50 Ohm). The former were a bit quiet and for a satisfactory loud sound the volume was almost maxed out. With the HD-595 the volume is at 2 o’clock. Besides, I like the slightly brighter sound of the HD595 more suitable to the N1X’s binaural CFX. So, you should be careful with high impedance headphones. They may be OK but may also be quiet. Also depending on how loud you like the sound.

Last edited by CyberGene; 06/30/20 03:53 AM.

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Previously: NU1X, ES7, MP6, CA63, RD-700SX, CDP-100, FP-5, P90, SP-200
Re: Ohm value
Beowulf #2996919 06/30/20 04:02 AM
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Thanks for sharing, CyberGene! I understand you also play with Garritan CFX. Do you play it through your headphones? If so, how does the VST sound?


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Re: Ohm value
Beowulf #2996923 06/30/20 04:15 AM
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Yes, I use the HD650 with my DIY controller and Garritan CFX. However for it to be loud enough I have an Apogee Groove USB amp which was advertised on the Sennheiser website to be a good match for the HD650s and is barely loud enough, just one tick before max value. But the slightly darker signature is good for the Garritan CFX and it reduces the noise in the samples.


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Currently: Yamaha N1X, DIY hybrid controller -> Garritan CFX
Previously: NU1X, ES7, MP6, CA63, RD-700SX, CDP-100, FP-5, P90, SP-200
Re: Ohm value
Beowulf #2996931 06/30/20 05:15 AM
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[rathole alert]
Interesting that the Groove is only just loud enough. Looking at the specs, I would not have hesitated to pair those two - the peak SPL should be around 120dB. (I get 122dB using official specs, and about 119dB using actual measurements that someone took of the HD650's sensitivity and impedance)

Greg

Re: Ohm value
Beowulf #2996947 06/30/20 06:14 AM
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The 250 ohm version might need a headphone amp. Maybe. The others likely will not.
Originally Posted by Beowulf
I am looking at the DT-990 Pro. ... I believe the ones available are 32, 80 and 250?
That is only a general rule of thumb, not a hard fact ... because pianos generally don't show their specs. You can only know by trying.

Re: Ohm value
Beowulf #2997064 06/30/20 12:22 PM
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You can run any of the headphones with any device.

This is more marketing than science as specs either are undisclosed or misrepresented, generally. Mismatch headphone & amp and music might play too low volume or slightly emphasize / deemphasize certain frequencies. The differences are subtle IMHO but at least you have a choice.

Generally, the lower ohm versions are made for very small devices like smartphones and laptops.

The higher ohm versions might be marketed with better sounding, lighter drivers but are made for more powerful specialised headphone amps. 600 ohm headphones with a smartphone might sound a bit quiet, with uncontrolled bass. Or not.

Beyer summarises some differences among 32, 80, and 250 ohm version headphones, with some marketing spin.

https://translate.google.com/translate?hl=en&sl=de&u=https://support.beyerdynamic.com/hc/de/articles/202502561-F%25C3%25BCr-welche-Anwendung-sollte-man-welche-Impedanz-Variante-des-DT-770-PRO-w%25C3%25A4hlen-&prev=search&pto=aue

https://www.head-fi.org/threads/beyerdynamic-dt990-600-ohm-250-ohm-or-32ohm.490997/

Re: Ohm value
Beowulf #2997301 06/30/20 11:56 PM
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When used with higher impedance headphones like the HD650 I find that the N1X has sufficient volume. That being said, the N1X lacks sufficient power to make the sonic result optimal. The difference between this setup and driving the same phones with a good dedicated headphone amp is not subtle. I am close to permanently strapping a headphone amp to the bottom of the piano.

What has kept me from doing so is that I am coming to increasingly like playing the N1X through its speakers.

Frankly, unless it has internal voltage multipliers in its power supply, I don't think that any USB powered headphone amp would cut it either.

Last edited by NormB; 07/01/20 12:00 AM.
Re: Ohm value
Beowulf #2997315 07/01/20 12:34 AM
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A CA99 customer recently reported that their HD650s are loud with the volume slider set to the 50% position, however the Kawai's upper CA and NV instrument feature a headphone amplifier developed by Onkyo.

Kind regards,
James
x


Employed by Kawai Japan, however the opinions I express are my own.
Nord Electro 3 & occasional rare groove player.

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Re: Ohm value
Beowulf #2997356 07/01/20 03:47 AM
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Think I may give the Sennheiser HD599 a try as well. I'm not an audiophile and I usually prefer playing quietly but just enough to allow myself not to lose control over dynamics. I get ear fatigue so easily that I try to avoid headphones as much as possible, but I also tend to be hyperactive late at night crazy


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Re: Ohm value
NormB #2997360 07/01/20 03:59 AM
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Originally Posted by NormB
When used with higher impedance headphones like the HD650 I find that the N1X has sufficient volume. That being said, the N1X lacks sufficient power to make the sonic result optimal. The difference between this setup and driving the same phones with a good dedicated headphone amp is not subtle.

I can't help wonder whether the difference is simply because the headphone amp can drive them louder, and if that's what you prefer, then the conclusion is that the N1X can NOT drive those headphones loud enough (for you).

Just btw, I've noticed that some folks think it's "wrong" to have to turn a volume control to 100%. There is nothing wrong with that at all. If that's what it takes, set it to 100%.

Greg.

Last edited by sullivang; 07/01/20 03:59 AM.
Re: Ohm value
sullivang #2997507 07/01/20 10:52 AM
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Quote
I can't help wonder whether the difference is simply because the headphone amp can drive them louder, and if that's what you prefer, then the conclusion is that the N1X can NOT drive those headphones loud enough (for you).

Not. I did not want to get into it, but the quality of the sound is significantly better using a good external headphone amp. The CFX samples really open up and the soundstage is bigger. I never have the N1X cranked up to maximum using the HD650 and the internal headphone amp.

There's a big difference between virtually every built-in headphone amp out there and a higher end external one. The latter exist for more reasons than draining your pocketbook.

Last edited by NormB; 07/01/20 10:54 AM.
Re: Ohm value
Beowulf #2997515 07/01/20 10:59 AM
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Thanks for that - very interesting.

Greg

Re: Ohm value
Beowulf #2997534 07/01/20 11:41 AM
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The creator can only guarantee sound performance on the exact hardware they pack.

Whether a line-out / headphone out will sound good is in reality out of their hands.


It's like color-grading. The movie studio can guarantee their mastering is good when viewed on a $50,000 mastering monitor, when it's stamped on a Disc, and mailed to your house, All bets are off. Even with TV calibration, consumer tvs simply can not achieve the static dynamic range of mastering monitors, so it'll be similar but ultimately different.

With sound end-to-end delivery is even more difficult. Good/Bad is mostly a case of psychology when it comes to headphones.


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