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The Beyerdynamic DT880 Discussion thread - Page 119

post #1771 of 10435

Hi guys.

I bought a second hand pair of 880/600ohms (or so i am told).

I have my doubts because of the following reasons...

 

1. They are tighter than my pair of DT990 32ohms, not as comfortable

2. There is no engraving on the plug end to indicate impedance rating

3. They work great just from my macbook output or mp3 player, electric piano etc, without need of an amp, and reaches quite loud levels (though not QUITE as loud as the dt990s).

 

This leads me to believe i have a pair of DT880 PROs, BUT it does not say Pro on the side plates.

I don't know what to believe anymore!!

Any help would be much appreciated. thanks

post #1772 of 10435
Quote:
Originally Posted by Jdiggity View Post

This leads me to believe i have a pair of DT880 PROs, BUT it does not say Pro on the side plates.

I don't know what to believe anymore!!

Any help would be much appreciated. thanks

If you have a multimeter just measure the impedance.

post #1773 of 10435
Quote:
Originally Posted by Jdiggity View Post

Hi guys.

I bought a second hand pair of 880/600ohms (or so i am told).

I have my doubts because of the following reasons...

 

1. They are tighter than my pair of DT990 32ohms, not as comfortable

2. There is no engraving on the plug end to indicate impedance rating

3. They work great just from my macbook output or mp3 player, electric piano etc, without need of an amp, and reaches quite loud levels (though not QUITE as loud as the dt990s).

 

This leads me to believe i have a pair of DT880 PROs, BUT it does not say Pro on the side plates.

I don't know what to believe anymore!!

Any help would be much appreciated. thanks

 

I have the DT880 600ohm.  You can actually drive them out of an iPod (takes about 90% volume) - BUT - they aren't driven well (dynamics).  Volume is OK - but they're 'lifeless' for want of a better word.  So just 'volume' won't actually give you a definitive answer.

 

I originally owned the DT 880 Pro 250ohm.  Biggest difference (aside from the clamp) between the Pros and the Premiums that I can remember - was that the Pros I owned had a coiled cable, and the Pro's had the snap-on headband cover - while the Premium's cover is fixed.

 

Photo of my Pros (since sold) for reference .....

dt880-6.jpg dt880-7.jpg

post #1774 of 10435

Call me subscribed!

popcorn.gif

I have a pair myself and they are awesome!

post #1775 of 10435
Quote:
Originally Posted by Brooko View Post

 

I have the DT880 600ohm.  You can actually drive them out of an iPod (takes about 90% volume) - BUT - they aren't driven well (dynamics).  Volume is OK - but they're 'lifeless' for want of a better word.  So just 'volume' won't actually give you a definitive answer.

 

Maybe the iPod is still not loud enough, or it is clipping, which would not be very surprising at 90% volume. In any case, the volume difference does suggest that Jdiggity does not have a 32 Ohm DT880, but it may still be either 250 or 600 Ohm, the difference between those two is not that large.

post #1776 of 10435

Brooko, Stv014, thank you very much for the help. ALTANertive, while i do own a multimeter, i am not sure if i trust myself with it, especially since i have read that it is possible to do harm to the drivers.

So maybe the volume thing can be explained, but i am still unsure as to why it clamps so tight and doesn't have a marking on the plug...

The investigation continues! Thanks again guys

post #1777 of 10435
Quote:
Originally Posted by Jdiggity View Post

ALTANertive, while i do own a multimeter, i am not sure if i trust myself with it, especially since i have read that it is possible to do harm to the drivers.

 

Measuring the impedance with a multimeter is simple. Regarding driver damage, you may want to check the manual of your multimeter, it should be noted how much current/voltage it outputs when measuring resistance. Generally, at a higher range setting, the current is lower. For example, with my DMM, at the 20 kiloohm setting, the short circuit current is less than 0.1 mA, and the voltage on a 600 ohm load would be less than 40 mV. A FiiO E10 has a DC offset of ~30 mV in high gain mode, so I do not think the measurement in this particular example is likely to damage the driver over a short period of time.

 

But you can also just check if your headphone looks more like this (Pro on the left), or this (Premium on the right):

DT880PRO_3c_1.jpg    DT880_bg_2.jpg


Edited by stv014 - 5/2/12 at 6:27am
post #1778 of 10435

My 600Ω gets to listenable levels with the iPod nano 7G, to LOUD levels with an iPod shuffle 1G, and to levels that are above my preference on the iPod touch 4G and iPhone 4S at volume settings below 90%.

 

I've found that depending on the iPod/iPhone model, anywhere past 80% on the volume slider can induce artefacts. Clipping is another matter entirely. Channel imbalance, high IMD, etc., but the new models are very competent. If I can relax my audiophile tendencies, I can enjoy the 600Ω DT800 with any of the units that get to comfortable listening levels.

post #1779 of 10435
Quote:
Originally Posted by Jdiggity View Post

Brooko, Stv014, thank you very much for the help. ALTANertive, while i do own a multimeter, i am not sure if i trust myself with it, especially since i have read that it is possible to do harm to the drivers.

So maybe the volume thing can be explained, but i am still unsure as to why it clamps so tight and doesn't have a marking on the plug...

The investigation continues! Thanks again guys

If it's a standard one using one of the 12v batteries you probably have nothing to worry about.  Just make sure it's set to give an ohm rating and apply the contacts to the appropriate locations.

http://upload.wikimedia.org/wikipedia/commons/archive/9/93/20060512201439%21Jack_plug.png

Touch the negative to the sleeve (1) and the positive to the right channel (2) and then the left channel (3) one at a time, getting the reading for each side.

post #1780 of 10435

Thanks ALTANertive. I did what you said using the settings shown in the picture here: http://img232.imageshack.us/img232/8717/wp000278.jpg (i hope they are correct)

And i got a reading of 237 for both left and right channels. Does this mean i have a 250 ohm model?

Thanks again

 

And regarding the images below, mine is basically a combo of the two. It looks like the one on the right, but the headband is a lot tighter like the one on the left. Instead of the cups dangling, they rest against each other when not on a head.

Quote:
Originally Posted by stv014 View Post

 

Measuring the impedance with a multimeter is simple. Regarding driver damage, you may want to check the manual of your multimeter, it should be noted how much current/voltage it outputs when measuring resistance. Generally, at a higher range setting, the current is lower. For example, with my DMM, at the 20 kiloohm setting, the short circuit current is less than 0.1 mA, and the voltage on a 600 ohm load would be less than 40 mV. A FiiO E10 has a DC offset of ~30 mV in high gain mode, so I do not think the measurement in this particular example is likely to damage the driver over a short period of time.

 

But you can also just check if your headphone looks more like this (Pro on the left), or this (Premium on the right):

DT880PRO_3c_1.jpg    DT880_bg_2.jpg

post #1781 of 10435

.


Edited by BeyerFan - 5/3/12 at 1:52am
post #1782 of 10435
Quote:
Originally Posted by Jdiggity View Post

Thanks ALTANertive. I did what you said using the settings shown in the picture here: http://img232.imageshack.us/img232/8717/wp000278.jpg (i hope they are correct)

And i got a reading of 237 for both left and right channels. Does this mean i have a 250 ohm model?

Thanks again

 

And regarding the images below, mine is basically a combo of the two. It looks like the one on the right, but the headband is a lot tighter like the one on the left. Instead of the cups dangling, they rest against each other when not on a head.

Same settings - mine show ~ 617 for each channel - so guessing yours must be 250 ohm.  Also - if it looks like the one on the right - then it's probably the Premium version.  AFAIK all the 'Pro" versions have the snap-on headband.  At rest, the cups on mine (Premium 600 ohm) touch as well - but so far I haven't found them overly clampy.  They're still extremely comfortable to me.

 

One guess as to why you don't have the impedance printed on the plug - perhaps they've been recabled at some stage?

post #1783 of 10435
Quote:
Originally Posted by Brooko View Post
One guess as to why you don't have the impedance printed on the plug - perhaps they've been recabled at some stage?

 

The impedance is not printed on the 250 Ohm versions, perhaps because that is considered the "standard" impedance.

post #1784 of 10435

OK - that makes sense then - his are very likely to be 250ohm Premiums.  Thanks for clarifying.

post #1785 of 10435

Ok, i'm pretty convinced i have a standard pair of premium 250s now. thanks everyone. Although i am still confused about the headband being so tight....

no matter. Thanks guys! And enjoy your 600ohm pairs! biggrin.gif

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