Rabbit
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Post by Rabbit on Sept 2, 2014 16:15:33 GMT
I've switched the pads back to the K702 and have been using them like this for a week or more now, and you know, it's not too bad at all! I keep changing my mind, but the k612 develops a very round and hard hitting bass and is definitely less 'peaky' up top.
Not burn in ....... but 'wear in' . The K702 pads are not quite as fat and they've kind of taken up the shape of my head, so I think the drivers are just a fraction closer to my ears. The result seems to be improved mids which makes them way more balanced than I first thought. Now I'm worried about the pads going any lower. They seem right to me now and I'm starting to think that the massive differences heard on this combo are perhaps due to pad newness. Mine seemed to slightly alter over a week of use and now they are way better balanced with regards to the bass in particular, but that may be the raised mids due to the slight closeness of the drivers.
I would say that anyone who has a 612 or a 601 and doesn't enjoy the brightness of their sound or crave more bass, these pads fix it. Nice and relaxing with a big hearted bass. I have sometimes felt that the K612 lacked in bass quantities but now, I really don't. It hits hard and seems quite low on some recordings.
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solderdude
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Post by solderdude on Feb 27, 2015 8:53:28 GMT
Measurements of Rabbit's K612 headphone with the stock pads: Note my measurements are NOT smoothed like those of GE and thus the peaks are more pronounced in these plots. When I apply 1/3 octave smoothing the sharp peaks aren't visible any more but they do exist and do not appear to be a measurement artefact. and CSD below: Of course I could not help myself and applied some simple and reversable mods. More elaborate impressions and findings can be found HEREScroll down to the K612 section.
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Rabbit
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Post by Rabbit on Feb 27, 2015 16:14:00 GMT
Really toppy and rolled away bass. Great shame. Bass is way stronger with K702 pads.
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solderdude
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Post by solderdude on Feb 27, 2015 17:40:11 GMT
Looks like a candidate for a Kameleon filter. The treble quantity can be altered with a piece of felt. see: diyaudioheaven.wordpress.com/headphones/measurements/brands-a/I don't find it is too rolled off in the bass. That becomes obvious once you know how real subbass should sound. It is a quite neutral headphone with a bit 'shouty' top. Once that top is lowered (the felt) a neutral headphone remains that only lacks 'body'.
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Javier
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Post by Javier on Feb 27, 2015 18:01:38 GMT
Very interesting, thanks Frans. I guess all you've said and do would would apply to the 601 as, I believe, they are basically the same, right?
The 551s are getting most of my listening time now. Great cans!
Sent from my GT-I9100 using proboards
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Rabbit
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Post by Rabbit on Feb 27, 2015 19:18:36 GMT
I don't find it is too rolled off in the bass. That becomes only obvious once you know how real subbass should sound. That is what I suspect has happened to me. I'm beginning to reject any headphone that doesn't deliver low bass properly. I have a 601 here, so I'll give it a go with some felt in front of the driver. I like the relative neutrality of the 601 and 612.
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Crispy
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Post by Crispy on Feb 27, 2015 20:50:08 GMT
The 551s are getting most of my listening time now. Great cans! Glad you like the 551s Javier I think I may have been a bit too hasty in dismissing them, the other night I was listening through my DT770s and was enjoying them for about half an hour then I really became aware of the bass hump that everybody goes on about and it started to get irritating. Then my wife had to go out and pick my daughter up, so I decided to listen through speakers. I am guessing my AE1 loudspeakers do not have a flat frequency response but I was immediately aware of the tight & not so flabby bass as compared to my headphones, so I may have to re-asses this flat headphone listening larkO_o
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Rabbit
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Post by Rabbit on Feb 27, 2015 22:43:30 GMT
It's weird but you kind of tune in to flatter headphones. Once you learn the sound, you become acutely aware of the colourations in many other headphones. I've also become accustomed, I think to hearing very low bass and find loads of headphones just don't go down there very easily. For that reason, there are quite a few headphones I just basically 'tolerate' now but end up back with a T40 which is one of the flattest I have. The hd650 is better once it's sorted out and even that, I now find a bit tainted in the bass!! Soon, I'll have nothing left to listen to.
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Deleted
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Post by Deleted on Feb 27, 2015 22:50:05 GMT
Well in that case...
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solderdude
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Post by solderdude on Mar 10, 2015 19:48:41 GMT
K612 on Kameleon. The treble seems a bit too much BUT if you lower it any further ir starts to sound 'dull'. This is logical as our ears do not detect those peaks and dips as such but hear an 'average' level. The average level (if I were to use the same smoothing as GE) would show a light wiggle only in the treble. Still sounds like the K612 but the bass and mids are more 'correct'. Bass flat down to 20Hz ... a full octave lower ! Even though it measures about equally flat to the (filtered) HD650 it doesn't have the 'balls' and quality the HD650 shows. I do find it an improvement though... alas you can only do so much and increasing the bass levels results in distortion an 'warmth, not in real bass.
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Rabbit
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Post by Rabbit on Mar 10, 2015 20:03:41 GMT
Pretty good though Frans. Half the price of a Senn. The slope upwards in the mids suggests it's still a little sharper than the Senn perhaps? Nice to see an improvement in bass extension and possibly, might work for the K701 and 702? Now that will put the cat amongst the pigeons!! A K702 with bass extension? They'll pass out!!
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solderdude
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Post by solderdude on Mar 10, 2015 20:08:32 GMT
Indeed... the peak around 2 kHz (a resonance) and the treble 'peaks' still make it brighter than the HD650.
It's not a bad headphone, very realistic bass and mids just not top notch and no 'grunt'.
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Rabbit
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Post by Rabbit on Mar 10, 2015 20:22:21 GMT
Well, that could help to fix the problems that some have with the K series. It's a pity about that treble. So GE is giving a slightly nicer picture of headphones? That might account why the subjective boxes don't always match exactly what you'd expect from the graphs.
If the k601 shows a slight wiggle in the treble, then you'd expect it to sound smoother than it actually is. When I look at the fr for the AKGs, I always wonder why they grabbed just so many fans for that sound. I could never relax with it.
Still,maybe you're getting to a point where you can find the best at say, £100, £200 and even £300 where filtering gives most benefit and so bring out some really good buys in headphones as long as they're filtered!
Lucky then that the K601 doesn't do anything better than the Senn. I must admit, the Senn hooked me straight away. It doesn't go 'lifeless' at flat like I feel some can. The K550 for me loses it energy and life but the Senn doesn't. It's almost as though the headphone is damped heavily and no longer has a quick response. Particularly the k550.
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Post by judgebuff on Mar 22, 2015 20:59:41 GMT
My new 612 has been burning in for 6 hours now. I can't wait to see how it pairs with my Horizon/X1 combo.
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Rabbit
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Post by Rabbit on Mar 22, 2015 21:04:09 GMT
Try high output resistance. That just makes it a tad more mellow.
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