Beyerdynamic DT220

General Information

The Beyerdynamic DT220 is a strange headphone. Nobody quite knows when production ended, but there have been ads for them dating back to the late '70's. They are studio headphones. Other than the ad, there is pretty much no information about them to be found other than a few Head-Fier's opinions.

Latest reviews

Pros: Sound, comfort (w/ new pads), easy to fix, it's a Beyer
Cons: Comfort (w/ old pads), narrow soundstage, only few parts available
First off, I'm not an audiophile, I'm a musician and a music lover - and my interest in HiFi stuff and headphones comes from there.
I've known those phones for years, they have been the in-store headphones of a German record chain, and apparently they simply don't break. So when I found a DT220 clean, fully working and cheap on eBay I couldn't resist.
With the old pads the sound was reasonably detailled, but rather low-mid heavy with a slightly pronounced bass. Treble sounded pretty accurate though unassuming. Anyway, a very pleasing sound, if slightly fatiguing. Also, soundstage is more or less a non-issue, it all plays pretty much within the listener's head. Still - not bad for such an old design!
The classic Beyer layout with the metal headband makes it easy to adjust the phones to the head, however, the old pads had gone extremely soft, which caused the elliptical rubber parts to exert some pressure on my ears. Not very comfortable!
Good news: Beyer still sells replacement pads for €15 a pair. I ordered them and a new cable (the dual-entry cable of the DT211/411 fits, but make sure to order sleeves with the cable!). That's what you call customer service!
With the new pads in place, it's amazing how comfortable those things are. The DT220 gets close to the classic AKGs, which fit my head perfectly. Changing the cable was a piece of cake, the screws for disassembly hide under the pads, contacts for soldering are marked, so this isn't really a big deal. 
However, the pad replacement changed the sound, too. Compared to what it was before, it is now almost amazingly linear and even with a much leaner/more natural bass response. It took some time for me to get used to it - actually even some time in which I didn't listen to the DT220 at all - to forget the old sound signature. 
Anyway, it changed for the better, it's less fatiguing now, sounds more natural. Isolation stayed pretty much the same I think - reasonable but nothing special. 
Apparently, the impedance of my unit is 400Ω. They do work on basically everything, even my Macbook and my Sony Walkman MP3 player, but they sound a lot better with my old JVC CD deck.
If you can get them cheap, go for them. Also, they come from one of the nicest and friendliest companies I know in the audio business - so if there's a problem, they are happy to help.
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You can check their impedance using an Ohm-meter. I'm surprised you can drive them using portable players, even if you had the 250Ohm version. They must be very sensitive phones.
Alright, my ohm meter is acting strangely, but apparently the DT220 is 400Ω. Concerning the use with the MP3 player, maybe I got ahead of myself a little. Let's say it works at a volume that is enough for home use. It wouldn't be my choice for a busy regional train etc. and it sounds better from the output of my old JVC.
Pros: Great flat response,well built.
Cons: Less comfort than DT-100.Ear pads a get a bit hard over time.
The Beyer DT-220 are a very solid pair of headphones and excellent for serious mixing requirements.

While the DT-100 are now the industry standard (and for good reason) I have no regrets buying 4 pairs of the DT-220 which I managed to pick up 2nd hand for £40 a pair.

The range is good at 20-20,000 htz and the sound is fairly neutral,being neither  too bassy nor too trebbley.
What you hear is what you get which makes these ideal for professional jobs. I have used these for day long sessions without suffering any ear fatigue which is essential.

The only downside I've found is that out of the 4 pairs I have 2 of them had rather hard ear cushions whereas 2 pairs did not. I think that over time the rubber cushions get slightly harder. Thankfully you can still get replacement parts for the 220's which includes new ear cushions.

In total, I would go for the DT-100 over the 220 due to the slightly increased comfort and broader freq range.However, for the money the DT-220 are more than decent for the studio professional, have great sound quality and will also last a long time.
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This is a mini review of the beyerdynamic dt220 400ohm.
Last year I stumbled upon a pair of dt220 on ebay for $75. I was unable to find information in regards to their sound but I bought them anyway. A true impulse buy. After hearing them, I bought another pair from the same seller. I could tell that I had found a special headphone, a true diamond in the rough.
The dt220 is rare and information is hard to find. There are a few pictures and specs but very little in terms of listening impressions. Luckily I have two original boxes, so here are the specs listed for my pairs:
20-200000 Hz 400ohm
102mW = 122db = 6.4 V an 400ohm 260g
There is also a 20ohm version of this headphone which I do not own.
Judging by the phrase "a quality product made in West-Germany", I can safely assume this particular headphone was made, at the latest, in the late eighties. Though it could very well be from the seventies. As said before, little is known about production timelines.
My two pairs are identical, likely bought at the same time for the same studio, as I got them from one seller. The pads are very different from modern pads. They are made from rubber and filled with foam. The drivers are comparatively small compared to modern drivers. There is also a dense foam piece that surrounds the driver, which your ear rests on. This gives the bass a very punchy feel, just like Grados. It's a nice departure from my other headphones. My pairs feature single sided entry cable, which must have been implemented after some time indicated by this awesome beyerdynamic photo featuring a dual entry cable:
This posed a problem, though. The depth of these headphones (thickness from front of pad to back of cup) is small compared to most beyerdynamics. This means that cup rotation is greatly hindered because of the cable entry/exit on top of the cups. You can even see where the aluminum cup brackets dug into the cable strain relief. Because of this limitation, the pads sat on my head at an angle which prevented a proper seal and removed what little comfort these headphones had.
To fix this I converted the headphone to dual entry using a sennheiser hd650 cable. I also removed the physical anti-rotation portion built into the cup hinge sockets and cup brackets. The result is perfect seal and the best comfort you're going to get with this headphone.
My first listen was made using a TI class-D amplifier board modified to be a headphone amplifier. This little amp works great for all my other headphones but I feel that the impedance of the dt220 (400ohm) is well beyond its capability. Not knowing this, I still enjoyed this headphone immensely. The sound was the same as using it unamped out of my iriver h320. Bass was lean, mids a bit cold and treble sounded good. They seemed ruler-flat and took about any music with stride. Though, they sounded almost horn-like with some music. This was my impression of them for months, as I had taken a break from my tube amp.
Eventually I decided to try them with my SS Millet tube amp and the difference was night and day. Many people say amplifiers make no difference, but with this headphone the difference was overwhelmingly positive and far too large to be placebo. Instead of an overall cold/flat sound, music became warmer and closer. Bass can extend extremely deep and the physical feel of kick drums is prevalent. Mids are smooth, not recessed and clearly audible. Treble is slightly relaxed but not to the point of being hard to distinguish.
Overall the sound these headphones present just works. Warm, musical, yet somehow faithful to the recording. Faithful in the way that just about anything you play will be represented accurately and pleasantly. Some headphones just can't do that.
Comfort is where these headphones fall short. Granted, these were geared towards studio  monitor users so comfort may have been placed on the back burner. The main problem (with single entry models) is the limited cup rotation as stated above. Remedy this problem, and all you have left to complain about are the pads themselves.
The pads are foam coated with flexible rubber. The ear openings in these circumaural pads are rather small, which my small ears barely fit into. People with larger ears may experience untold discomfort. I can last a couple hours before I need a break.
Just beneath the main pad is a smaller pad made out of dense foam rubber. This smaller pad surrounds the driver and makes contact with your ear. This pad is interesting because its removal means loss of all warmth and bass. I believe the pad is there to limit the amount of dead air in between the driver and ear, as well as physically transmit vibrations to the ear. This gives a very punchy, physical bass experience much like supra-aural Grados. Remember, the driver in this headphone is actually very small, being around 30mm instead of beyerdynamics current 45mm. It doesn't move air quite as effortlessly.
These headphones sell for relatively cheap as far as I can tell. I got both my pairs for around $75 and I consider that a great bargain. I have even heard of them going for well under $50. At any of these prices they are a great deal. They can compete with all my other headphones.
If you want these, consider proper amplification. It's even more important with these 400ohm headphones than it is with the k702. My tube amp brought out the best in these headphones, so try to have an amp on hand with specs greater or equal to the SS Millett.
That's it.
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