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Author Topic: DT880-250 Frequency Response and CSD Waterfall Plots  (Read 15060 times)

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Thujone

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #30 on: August 23, 2013, 12:16:46 AM »

Whoaaaaa. I just had my buddy give me his old DT770 silver velours (since he's hooked on the J$ pads right meow) and I put them on the DT880's and they are totally different pads. They feel the same, look the same, but the foam padding used on the old DT880 pads (as seen through the holes on the underside) is black while the new DT770 pads have a white. I didn't think anything of it until I started listening to a few tracks with the DT770 pads... The bass immediately goes through the roof and drowns out the midrange. Since I hadn't ever heard of Beyer making revisions on the pads, I started thinking I had some sort of software EQ on until I finally switched back to the stock pads and everything is back to normal. Is anyone aware of these differences? beyerdynamic-usa.com only carries one set of silver velour pads and they are the "EDT 990 V" while Amazon carries both the 990 and 770.

I guess my main question is if Beyer simply changed pads with the newer version of the DTXX0 series, or is there a EDT880 out there that I'm too dumb to find?

Well there are 2 different pads.  1 for the open/semi-open and another for the closed.  I'll have to check my sets at home.  I seem to recall my DT770s having no holes.  I bought the black DT770 pads but do have the silver ones around still.

What's funny is I have the newer DT770s, I can't recall what year or if there is a version after that, with the solid black cups.  They are bass light, and quite bright.

Anyhow.  Silver DT770 pads.  http://north-america.beyerdynamic.com/shop/hah/accessories/headphone-accessories/ohrmuschelsatz-1.html

DT880 and DT990 used the same pads, IIRC.

Ah, I see that now. If you click on "Accessories" you can find the 990 pads and if you click on "Headphone Accessories" you will find the 770 pads. I also see now that they specifically say to use the 990 pads for the 880, whoops. Danke.
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Solderdude

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #31 on: August 23, 2013, 06:39:33 AM »

Don't use 880/990 pads on a 770 and vice versa.

They have closely the same appearance and size but sound (and measure) VASTLY different and I am talking 10dB+ in the lows.
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2000impreza

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #32 on: August 23, 2013, 05:01:10 PM »

Did anyone notice the recently released Beyerdynamic A20 amp has a fairly high output impedance? Similar to the A1, the output impedance is over 100 ohms. I do wonder if Beyerdynamic intended for the 250 and 600 ohm headphones to be used with a higher output impedance source. 
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wildstar

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #33 on: August 23, 2013, 07:16:50 PM »

Just got these off eBay (they seem to be going cheaply in the UK for some reason) -- DT880 250Ω [latest version].

Tried then on the E9, they noticeably have more bass and less treble on the 43Ω output (vs the 10Ω output). This happens on most cans I've tried, but on the DT880 it seems more pronounced. Thing is, it does sound more "natural" this way, the slight bass hump balances the hot treble better. To me it definitely seems Beyer tuned them for this.

There is some obscure audio standard for headphone output impedance that specifies 120Ω. Beyer amps follow this to the letter, and hearing this DT880 it does make me feel that they indeed tuned the headphones for 120Ω sources.

I'm tempted to get one of those ER-4P to ER-4S 75Ω adapters (assuming they're just a pair of resistors in series).
« Last Edit: August 24, 2013, 12:07:43 AM by wildstar »
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holland

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #34 on: August 23, 2013, 07:48:24 PM »

I almost always use 100-120ohm outputs for my Beyer(s), all of them.  DT440, DT660, DT770, DT990, and DT150.  It's the only way I listen, IMO.

Some people hate it, so YMMV.  Some people say it gets too flatulent.
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donunus

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #35 on: August 24, 2013, 01:02:23 AM »

I have a 120ohm adapter, would that be approximately the same compared to plugging the cans in a 100+ ohm headphone jack? or would the 75 ohm adapter work better? How does it work, does the impedance adapter get added on to the current headphone jacks output impedance or does it work like adding an extra 120 ohms to the headphone itself ex 250 ohms become 370 ohms when adding that adapter...
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2000impreza

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #36 on: August 24, 2013, 02:00:58 AM »

Adding series resistance increases the source output impedance. The 120ohm adapter adds to whatever your source output impedance. 
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donunus

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #37 on: August 24, 2013, 04:39:40 AM »

ahh thats cool. I tried using a tester with my 120 ohm adaptor and it gave me a reading of 25 on the x10. So 250 ohms? Is that because I am hitting two things inside the jack and the tip on the other side?
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2000impreza

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #38 on: August 24, 2013, 05:38:02 AM »

Try testing each channel separately. Assuming this is a TRS jack, the tip is the left channel and the middle ring is the right channel. To test the resistance, you need to connect the multi-meter to each side of the adapter, one channel at a time. If the adapter is well made, the resistance should match or very close at least.

I made a 100 ohm adapter awhile back to test on the akg k701. I'm curious how the dt880-250 will sound with the increased impedance. I'll test this out next time I get a chance.   

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donunus

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Re: DT880-250 Frequency Response and CSD Waterfall Plots
« Reply #39 on: August 24, 2013, 06:17:46 AM »

The thing is I can't see what part of the TR or S I am touching inside at the other end. I dont have a cable I can use at the moment LOL
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