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Sennheiser 6XX high second hand price? Where to buy.

Galway

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Mar 17, 2026
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Im a bit of a headphone hoarder / collector and have always wanted the Sennheiser HD600, who wouldn’t? But as a collector part of the appeal is getting a bargain off the second hand markets avoiding the landmines of fakes/scams/faulty deals to be had. I think we all here have similar goals and yet the price of these desires always seam to be far too high.

If anyone has such a goal as me, and laugh at the high second hand market price of these might want to pop over to Sennheiser outlet and be pleasantly surprised.

I understand why they command such a high price, but do you think this is justified?
I have heard them lots of times, and I really want to add them to my collection and now they have been bought and i'm awaiting delivery. Who else covets these legendary cans.


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Those really are good prices and reminds me of hifiman because they often sell open box or refurb units for well under what is being asked for used units on eBay. I did have a HD6XX a while back and felt they were a bit underwhelming, but that was back before I started using peq. I do think it's useful to have heard the hd600 or 6xx because reviewers quite often use them as a reference point e.g. these headphones have more bass than the HD600, or brighter than the HD6XX etc.
 
The Sennheiser HD6XX was only sold via Drop (which does not exist anymore).
They thus are only found 2nd hand.
HD6XX is a HD650 with a shorter cable and simpler paintjob.

Both the HD600 and HD650 have had (silent) revisions over the many years of existence.

I assume you meant both the HD600 and 650. (HD6x0)
HD 660S(2) uses a different driver and HD630VB as well as HD620S are using different drivers and chassis.
 
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Those really are good prices and reminds me of hifiman because they often sell open box or refurb units for well under what is being asked for used units on eBay. I did have a HD6XX a while back and felt they were a bit underwhelming, but that was back before I started using peq. I do think it's useful to have heard the hd600 or 6xx because reviewers quite often use them as a reference point e.g. these headphones have more bass than the HD600, or brighter than the HD6XX etc.
This is why I have always wanted the HD600. They ARE the most referred to reference point and there are times when im listening to music would like to hear how they sound under this baseline. I will be using it with a Topping DX5 2 which should be more than capable of driving and through Foobar.
 
For anyone who buys from Sennheiser outlet, I got them today in a standard box with a refurb sticker on the bottom of the box.
They look brand new with not a mark on them ! They came with brand new pads, already attached new leads and a instructions booklet.
Fired them up and they sound amazing as expected. For £139 I stole them.
 
The Sennheiser HD6XX was only sold via Drop (which does not exist anymore).

I didn't realize Drop was no more - sorry to hear that. I got a pair of HD6xx's from them during a sale/promotion and have always enjoyed them. Also got a great deal on a Moccamaster coffee maker, of all things, from them.
 
The Sennheiser HD 6XX was and remains one of the best deals and high quality headphones that came at an incredible price. It was basically a carbon copy of the Sennheiser HD 560. When I bought it from Drop the price was 122 $2 to which you needed to add transport and Customs for his brought the price up about 30 dollars for stop. I owned a HD 560 but I preferred the hd6xx because I find it slightly bassist what is the sound profile that I prefer. The sound of this headphone is simply fantastic on par on power with units that around six to seven hundred Dollars. The day I heard this thing for the first time on my audio system, i immediately ordered a second one to make sure that I had a guarantee if something happened to the first one. So far the first one is behaving impeccably
I know that I'm being off Topic but you're really have a chance to give a solid credit to this extraordinary headphones.
 
If I see some drop HD6XX on Ebay I will get them if they are at a price I cant resist. I do like the HD600s for the vocals and to have as a reference and they are exceptional for the money I got them for. They do hold their money well !
 
I too have a pair of HD6XX from Drop. I bought them a couple of months before Drop ceased to exist.

Unfortunately I never really warmed up to them. They are probably the most uncomfortable pair of headphones I've ever used, the clamp is extreme and gives me headaches about 10 minutes after wearing them. I tried gently stretching them as suggested on so forums to no avail. They are sitting there basically in as new condition, I should really sell them.

Also with the music I listen to I never thought they did anything better than my HD800 with the French Resonator mod really, and the HD800 are about a million times more comfortable so there's that.
 
I too have a pair of HD6XX from Drop. I bought them a couple of months before Drop ceased to exist.

Unfortunately I never really warmed up to them. They are probably the most uncomfortable pair of headphones I've ever used, the clamp is extreme and gives me headaches about 10 minutes after wearing them. I tried gently stretching them as suggested on so forums to no avail. They are sitting there basically in as new condition, I should really sell them.

Also with the music I listen to I never thought they did anything better than my HD800 with the French Resonator mod really, and the HD800 are about a million times more comfortable so there's that.
Clamping force is like the easiest thing to solve with HD6x0 series headphones. You can bend them to your liking. It's a non-issue. If there's no change then you are not using enough force.
 
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the clamp is extreme and gives me headaches about 10 minutes after wearing them. I tried gently stretching them as suggested on so forums to no avail.
tried this ?
clamping-force.jpg

Do NOT attempt to bend the plastic part of the headband, just the metal as close as possible to the headband.
The trick works well for nearly all similar steel headband slider mechanisms.
Below the same trick but for Jade Audio headphones.
headband.jpg
 
Clamping force is like the easiest thing to solve with HD6x0 series headphones. You can bend them to your liking. It's a non-issue. If there's no change then you are not using enough force.

Well it is an issue FOR ME.

I think I wrote in acceptable English didn't I.

I tried.

I didn't apply extreme force as I don't find them so special anyway and prefer to pass them on in as new condition to the next owner.

Wouldnt want to buy Tup3X stretchy-flabby "near mint" HD6XX myself, so I won't inflict this in turn on a potential buyer.
 
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tried this ?
clamping-force.jpg

Do NOT attempt to bend the plastic part of the headband, just the metal as close as possible to the headband.
The trick works well for nearly all similar steel headband slider mechanisms.
Below the same trick but for Jade Audio headphones.
headband.jpg


No I did not. I left them to stretch for a week clamping their own box. Didn't change much at all, and I found the earcups themselves pretty claustrophobic for my ears, with the inner velour touching my ears.

I thought my old DT880 Premium were way more comfortable, pity they sounded so much worse to me than the 6XX. Luckily the HD800 solve all my problems.
 
Stretching does not help because it simply goes back to its original position.
The metal needs to be bent carefully beyond its point.
Try the described method. Its reversible you can always bend it back.
Start with a gentle force and increase it step by step.
Both sides alternately.

Yes, Beyerdynamics are more comfortable but have even less pad thickness.
 
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