Superlux HD-669


Studio Headphones

  • Ideal as stage monitor and in the studio
  • High external noise reduction
  • Linear response with defined, powerful bass
  • Circumaural
  • Closed
  • Dynamic
  • Neodymium magnets
  • Peak SPL: 98 dB
  • Impedance 56 Ohm
  • Frequency range: 10 - 30,000 Hz
  • Power capacity: 200 mW
  • Detachable cable
  • 1 m and 3 m cables with 3.5 mm stereo jack
  • Weight with cable: 300 g
  • Weight without cable: 244 g
  • Includes: Carry bag and 6.3 mm stereo jack adaptor
Available since August 2011
Item number 245989
Sales Unit 1 piece(s)
Design Over-Ear
System Closed Back
Impedance 56 Ohms
Frequency range 10 Hz – 30000 Hz
Adaptor Yes
Replaceable Cable Yes
Colour Black
Max. SPL 98 dB
Type Of Connector Mini Jack
Weight 244 g
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521 Customer ratings

4.2 / 5

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299 Reviews

Bang for the buck, I guess?
Karmo7 07.03.2020
Bought them for only monitoring live recording levels at church.
First thing i did was to compare them to my ATH-M50x. Here are my thoughts:

Build quality:
Nothing no praise unfortunately. Manufacturing marks, cheap looking thin cables, cheap-feel plastic, ugly carrying pouch and "leather" headband pads.

These are huge! Pads feel stiff and earcups can only move few degrees to adapt over your ears. But this can be a good thing when you happen to have slightly bigger ears.

About the sound:
I found them very bass heavy, but bass is quite tight and defined. But for my taste, too much bass.
Low-midrange is quite "missing" and what's left is muddy.
Upper-midrange is good! Vocals sound very clean, nice and present through these!
There is a very audible presence boost say, about 5-8kHz range. It gets a little annoying and tiring when listened on high volume for some time.
Unfortunately above these frequencies there is mud again. Highest frequency details, often referred as "air" or "shine", are poorly defined and sound dull.
They are not very sound proof either. Outside bleeds in and otherwise. Wouldn't recommend for tracking.
One more thing, compared to ATH-m50x, they sound "distant". While ATH feels really close, in your face, HD-669 creates "distance" between the the ears and the sound. Can't say if it a good or a bad thing.

Power hungry!
They do need a lots of power to drive them. When plugged straight to smartphone, you cant get anywhere near loud without distortion. But my MacBook Pro preamp did just fine.

FOR THE PRICE I would say amazing sound! Useable for a lots of things, but for serious mixing or everyday music listening, please consider something else. In blind test I would have guessed them in 50-60 euro price range by the sound.


R0aDkilL 29.11.2017
I have roughly around 14 sets of headphones & these are in my top 3
i use them daily (along side the dt 770 & hd25) for editing, mixing & daily listening.


+Build Quality is super solid
the removable mini-jack-type connection is a freaking lifesaver, it has saved me & musicians from breaking the cable like +10 times

the support wings have metal arms so you can bend them to fit abnormally large or small head sizes

+sound quality is superb
its insane for this price, it easily beats other cans 6x its price. i measure (frequency analyse) all my headphones & there are super small differences in the Left Right hi end (+7K) response which adds depth to the stereo spectrum.
overall response has flat mids, 10db sub boost (20-90hz) & 7dB hi end (5K-12K) boost (with a typical 3.5k cut)

you shouldnt be able to break em, but if you do, its not even a big deal


the original ear cushions are a good quality but they are a to firm for me so i ll be upgrading them with Brainwavez hm5


good headphones
Mehto 19.11.2020
Cheaper alternatives got dropped from the table once and broke. Had to buy new ones and decide to go with a little pricier ones.

Comes in with shorter and longer cables that are quite handy. Headband feels kind of cheap and I don't really like them. Then again they don't bother that much so in this price range it's not that big of a deal


Awesome sound! but my head hurts.
Anonymous 11.05.2014
I really like these phones, but the reason why I bought these was not the reason why I will keep these.

The headphones have a really clear sound, and according to my friend who also uses these. The phones have a straight EQ curve. (with my own EQ settings) The bass is huge. The mids are okay, The treble is okay, but a bit too much for me.

The phones are big, over the ears, huge. They look a bit weird when they are on you, but if you don't care how you look, that really doesn't matter.

These will not break on you, like seriously these are built to last. You don't have to worry about breaking these when you take them off of your head, unlike with some other headphones.

I bought these headphones, so I could have massive amount of quality while on the buss for example. These do deliver in the sound department, but not in the portability. They are a bit heavy and a bit un-comfy. You need to let these morph to your head until they become comfy.

They are really big, so be aware of that! And whilst these are on your head they are borderline UGLY!

I still do recommend these, because if you want big headphones that have good quality for dirt cheap. These are just meant for that.