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KRK KNS-6400 Review - Impressive $99 Giant Killer - Page 8

post #106 of 225
A big thank you to all that contributed to this thread. i have a set of the 6400's on the way. I have a question regarding the detachable cord. I know im going to want a shorter cord right off the bat... is it a 3.5 on both ends or 3.5 to 2.5 or? Also, from what ive seen it only connects to one side of the phones. is that correct? any help would be appreciated.
post #107 of 225
Quote:
Originally Posted by Guizan View Post

A big thank you to all that contributed to this thread. i have a set of the 6400's on the way. I have a question regarding the detachable cord. I know im going to want a shorter cord right off the bat... is it a 3.5 on both ends or 3.5 to 2.5 or? Also, from what ive seen it only connects to one side of the phones. is that correct? any help would be appreciated.


1/8" on both ends with a 1/4" screw on adaptor (on the input side, obviously).

 

It connects to the left side of the headphone. The connection has not only a very narrow fit, but it's proprietary as well. There's a little carved out channel on the plastic portion of the connector head that slides into place on the headphone upon rotation.

 

KRK has a smaller length cord (1m, perhaps?) available as an accessory through its distributors.


Edited by zyzyx - 8/6/11 at 11:13am
post #108 of 225

I figured I would update my findings on both the 6400 and 8400.

 

Let's get to the bottom line. The 6400 with memory foam pads is the superior headphone. Without them, the 8400 is superior. Yes, the memory foam pads make that much of a difference. They bring out the much needed bass on the 6400, while balancing it out a bit more. Without them, I'd take the 8400, as it sounds better to my ears than the 6400 with stock pads. So, my highest recommendation is to buy the 6400 and buy the 8400's memory foam pads and headband. That's definitely the headphone I'd take between the two.

post #109 of 225

Actually, it's 2.5mm on the earpiece end and 3.5mm on the connector end. I've got my pair right here. Just unplug it and you compare the two terminals.
 

Quote:
Originally Posted by zyzyx View Post





1/8" on both ends with a 1/4" screw on adaptor (on the input side, obviously).

 

It connects to the left side of the headphone. The connection has not only a very narrow fit, but it's proprietary as well. There's a little carved out channel on the plastic portion of the connector head that slides into place on the headphone upon rotation.

 

KRK has a smaller length cord (1m, perhaps?) available as an accessory through its distributors.



 

post #110 of 225
Quote:
Originally Posted by soundstige View Post

Actually, it's 2.5mm on the earpiece end and 3.5mm on the connector end. I've got my pair right here. Just unplug it and you compare the two terminals.
 



 


Duh!  Good catch. That would account for the narrower entry at the headphone end :)

 

post #111 of 225

Ok, we've discussed the sound quite much. They state this at KRK's site regarding the 8400's:  "Being able to discern the most subtle differences in pitch, timbre and tone"

 

Now that's ALL that matters in the end: whether you're able to hear what's played. I listen to a lot of n-jazz (heh, had to throw that in) that's mostly modal. Anyone care to 'pitch' in and comment on this between the two models and gladly against an SRH940 as well? I'd appreciate it. :)

 

For instance, even though the K601 is flatter in FR than the K701, the latter one is better at distinguishing notes in pitch. I've not heard much pop from Jamaica, but that genre generally is usually void of melodic content, which is the reason I don't use it for evaluating headphones. I also think that if this factor is regarded in headphone design, it should perform more than adequately throughout, regardless of musical genre.

post #112 of 225

I'm loving the 6400's. Can anyone recommend an IEM with a similar sound signature? After burning these in and getting used to them... It's almost gotten hard to listen to my Monster Miles Davis Tributes so I think it's time to move on. I was thinking of something like the Vsonic GR07 or the fischer dba-002?                                                                                                                                                                             

post #113 of 225
Quote:
Originally Posted by Katun View Post

I figured I would update my findings on both the 6400 and 8400.

 

Let's get to the bottom line. The 6400 with memory foam pads is the superior headphone. Without them, the 8400 is superior. Yes, the memory foam pads make that much of a difference. They bring out the much needed bass on the 6400, while balancing it out a bit more. Without them, I'd take the 8400, as it sounds better to my ears than the 6400 with stock pads. So, my highest recommendation is to buy the 6400 and buy the 8400's memory foam pads and headband. That's definitely the headphone I'd take between the two.



The two 'phones look similar. Is there any way we can be sure that the 8400 is not just the 6400 with memory phone pads and a white semi-circle stripe? The specs look very similar as well.

 

I just ordered the 6400 because I'm looking for something similar to the SRH940 without the brightness.

 

post #114 of 225
Thread Starter 


 

Quote:
Originally Posted by Beagle View Post





The two 'phones look similar. Is there any way we can be sure that the 8400 is not just the 6400 with memory phone pads and a white semi-circle stripe? The specs look very similar as well.

 

I just ordered the 6400 because I'm looking for something similar to the SRH940 without the brightness.

 


I bet the KRK KNS-6400 would be a good match since the treble isn't too bothersome and I'm fairly sensitive to treble. When it comes to the sound, I don't know how well it holds up. I hope it does well, but it's still a $99 headphone, but quite a good one.

 

The 6400 and 8400 definitely don't share the same drivers unless they did some major tweaking to the cable or internal configuration.

 

I had the 6400 and 8400 at the very same time and they just sound totally different.

 

The 8400's mids are kind of laid back, not recessed or anything, but would be great for someone who is in the studio and listening to them for 8 hours. Due to this, some detail is easier to spot on the 6400. The 6400 mids are far more forward sounding and far more engaging to me. Not too forward, but better for some music. I think the 6400 has a little less treble extension than the 8400. The treble on my first 8400 was painful, but not so much on the 2nd pair I got a year later. The treble on the 6400 is non-fatiguing for my ears.

 

I ended up selling my 8400 and keeping the 6400. 6400 is just a lot more fun to listen to and I love it's mids. My 6400 with memory foam pads also had a little more bass impact than the 8400. It could be the memory foam pads helping in this area, but who knows. Memory foam pads for the 6400 are totally worth it despite the $30 price. I could have sworn they were cheaper 6 months ago, but when I bought them they were out of stock for a month.

 

 


Edited by tdockweiler - 8/21/11 at 11:12am
post #115 of 225

Thanks! I guess the 6400 is a good starting point anyway. I was wondering how much difference the pads made. Looks to be rather significant. I tried the grey velour SRH940 pads on my ATH-M50 and they made quite a difference, toning down the slight bass bloat.

 

If I might ask, where did you get the memory phone 8400 pads for your 6400? Direct from KRK? I apologize if this has already been answered.

 

 

post #116 of 225
Thread Starter 

I got my pads from American Musical Supply I think:

http://www.americanmusical.com/Item--i-KRK-CUSK00003-LIST

 

When I originally bought them they were much cheaper and I was pretty sure I had only paid around $24 shipped. I had to wait around 3-4 weeks though and it looks like they just increased the price to $30.

They're for the 8400 but fit the 6400 perfectly. They're a bit tricky to get on and it's best to click each "clip" on place with a fingernail or something flat. This is why it's hard to compare them side by side. I only did it once and didn't hear any major changes, but I believe Katun told me it may improve the bass on the 6400. Hard to say for sure. This may be why my 6400 with memory foam pads had better bass than the 8400.

 

The memory foam pads are totally worth it because I've found they're the most comfortable pads ever made for a portable. They even have those Triport memory foam pads beat!

 

You can even buy the 8400's memory foam headband pieces, but I didn't have any reason to do that.
 

Quote:
Originally Posted by Beagle View Post

Thanks! I guess the 6400 is a good starting point anyway. I was wondering how much difference the pads made. Looks to be rather significant. I tried the grey velour SRH940 pads on my ATH-M50 and they made quite a difference, toning down the slight bass bloat.

 

If I might ask, where did you get the memory phone 8400 pads for your 6400? Direct from KRK? I apologize if this has already been answered.

 

 



 

post #117 of 225

Thanks again!

 

I was looking at this review and it claims the 8400's bass is recessed in comparison to the mids. Judging by the graph, one would think that it should be the opposite.

http://www.avguide.com/review/krk-kns-8400-professional-monitoring-headphone-playback-47?page=1


Edited by Beagle - 8/21/11 at 2:26pm
post #118 of 225
Thread Starter 

It may be recessed slightly in comparison to the mids. Maybe a very tiny bit. I like this though. I just think people looking for a lot of bass impact should look elsewhere. The bass seems a bit different on these. My first pair had almost non-existent bass and to this day I don't know if I got a lemon. Second pair was a little bit better. At least with the 6400 I'm perfectly happy with it's bass.

 

Which graph were you looking at? The Headroom graph makes me sick! It's way off to what I'm hearing. I mean seriously it looks like the XB500 graph or something probably. The 6400 graph looks at least more accurate. Maybe there is variations between pairs. Clamping force may have something to do with it. Mine had very little clamping force. I tried to increase it, but didn't notice much change though.

 

I trust these graphs a little more:

 

http://www.innerfidelity.com/headphone-data-sheet-downloads

 

The review on the avguide I'll need to read. I think he complained about the mid-forward sound on the 8400. This makes little sense to me, because on every amp I tried they're are not really all that forward sounding. He should have compared them to the 6400. The 6400 is the one that has forward sounding mids. I know what forward sounding mids are like (it's what I prefer) and BOTH 8400's did not have it. Maybe a little forward a tiny bit in the upper mids, but not enough to put it into the category of headphones with forward mids. I guess sound varies between sources and amps, so who knows. Tried about 3-4 amps with my KRKs when I had them. The 8400 made my DJ100 sound like some kind of bass monster and it's certainly not! normal_smile%20.gif

 

Reviews are weird on the 8400. On one website, they said it had "scooped out mids" confused_face_2.gif Don't think I'd go that far! My first pair felt like it's main focus was on treble and then the mids. Second one wasn't so treble happy and sounded quite normal. So my only guess is that differences vary between pairs. Even if the mids look forward on paper, mine sure didn't sound that way at all. If they did, I sure wouldn't mind.

 

One strange thing I noticed with the 8400 is that there were some very faint background details I could not hear on the 8400, but could on the 6400. I could not hear it on the 8400 until I boosted the mids with an EQ by about 4db I believe it was! Mostly sounds that nobody (outside of a studio) would normally hear. I think it was the sound of air in a cave!

 

If the 8400 had forward upper mids, then you'd think I'd prefer it for female vocals, but not really at all. I really need to try the SRH-940 and see if it my KRK does anything better. Hope so. I'm happy with the bass on the 6400, but if it has more bass or even more bass impact, then it'll be a bonus.

 

Sorry, none of this has anything to do with the original question. I really like talking about the KRKs I guess! More people should try them.

 

 

 

Quote:
Originally Posted by Beagle View Post

Thanks again!

 

I was looking at this review and it claims the 8400's bass is recessed in comparison to the mids. Judging by the graph, one would think that it should be the opposite.

http://www.avguide.com/review/krk-kns-8400-professional-monitoring-headphone-playback-47?page=1



 


Edited by tdockweiler - 8/21/11 at 3:14pm
post #119 of 225



 

Quote:
Originally Posted by tdockweiler View Post

Which graph were you looking at? The Headroom graph makes me sick! It's way off to what I'm hearing.



Yes, it was the HeadRoom graph. It did not match what the reviews were telling me. Bass on that graph resembles the Beats eek.gif

 

Anyway, I'll see what the 6400 has to offer and go from there. Certainly not an expensive venture and will satisfy my curiosity. Looking forward to something without that all-too-common treble spike.

 

Thanks again for all your help and input.

post #120 of 225

Thank you Tdockweiler for the detailed review.

 

I am not sure why, but I found that my pair has left much to be desired. The clarity is lacking far behind my Sony MDR7506 with DT250 pad mod, it is like we are talking about different phones. The fact that the two pairs of 8400 of Tdockweiler has a slightly different sound makes me wonder if the QC of KRK is adequate.

 

Hopefully this is a run-in issue which will sort itself out overtime.

 

BTW how do one remove the original pads and replace with the 8400 pads ? The pads with my 6400 seem pretty secured with the phones.

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