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AKG K601 & K612 Pro Owners... UNITE!! - Page 83

post #1231 of 1499
Quote:
Originally Posted by kman1211 View Post
 
Quote:
Originally Posted by elwappo99 View Post
 

 

The K601 and K501 are very strange beasts. They really take an unusually large amount of power to get them going, so don't be fooled by the lower impedance they have. I find beyerdynamics take a lot less wattage to run even though they are 600Ohms. 

 

 

Also, I don't hear a lot of complaints about driving beyers, but they do have plenty of other SQ related issues :p


I would say the same about the K701 family as well in that they are picky suckers just like the K601 and K501. They are easier to drive but still a pain to get going like the K601 family.

 

Definitely. The K701 set have their own quarrels with amplifiers. But in my experience they don't require the same amount of power the K601 and K501 I had did. 

post #1232 of 1499
Quote:
Originally Posted by elwappo99 View Post
 

 

Definitely. The K701 set have their own quarrels with amplifiers. But in my experience they don't require the same amount of power the K601 and K501 I had did. 


I have noticed that, I was thinking my K712 was veiled then I changed tubes and they completely opened up and the veil disappeared while taming treble spike and bringing the mids forward. From what I've been told AKGs are voltage hungry. The K612 is harder to driver overall, on my amp the difference isn't much but I do have to turn the volume pot slightly higher on the K612 than the K712.

post #1233 of 1499

Well, a lot of amps output a lot less power into 120ohms than let's say into 60 or 30ohms.

I've never had to turn the knob more than halfway with the Mstage, but that's still a lot more than easy to drive headphones [MA900, X1], which don't go above 10% or 15% respectively... Those are 15 and 35 ohms though.

So I'd estimate the K612 to be rather hard to drive, compared to most dynamic headphones. They don't hold a candle to certain planars of course.

Oh, and they're indeed a bit picky :rolleyes: 

post #1234 of 1499
Quote:
Originally Posted by kman1211 View Post
 
Quote:
Originally Posted by elwappo99 View Post
 

 

Definitely. The K701 set have their own quarrels with amplifiers. But in my experience they don't require the same amount of power the K601 and K501 I had did. 


I have noticed that, I was thinking my K712 was veiled then I changed tubes and they completely opened up and the veil disappeared while taming treble spike and bringing the mids forward. From what I've been told AKGs are voltage hungry. The K612 is harder to driver overall, on my amp the difference isn't much but I do have to turn the volume pot slightly higher on the K612 than the K712.

 

That's pretty interesting you felt that way about the tubes. Looking of the EF2a, it doesn't seem like it really has lots of juice on the bottom end. 

 

I'd bet the K612 would sound sweet with a vintage receiver. 

post #1235 of 1499
Quote:
Originally Posted by elwappo99 View Post
 

 

That's pretty interesting you felt that way about the tubes. Looking of the EF2a, it doesn't seem like it really has lots of juice on the bottom end. 

 

I'd bet the K612 would sound sweet with a vintage receiver. 


Yea, well the differences are easily audible, especially with the K712 and K612. The EF2A has a lot of gain and outputs a lot of voltage, every single AKG I hooked up to it sounds sweet, powerful, dynamic, physical, and musical with the amp. It's not the most soundstage oriented amp, but it's not really lacking in soundstage either. It brings out the dynamics and physicality out of AKGs from the bass, mids, and treble. The slam, presence, and physicality of the bass is impressive. It's a fun amp that gives you quite a physical experience.

 

I haven't heard them on a vintage receiver. I loved both the K612 and K712 with various tube amps I heard though.

post #1236 of 1499
Quote:
Originally Posted by kman1211 View Post
 
Quote:
Originally Posted by elwappo99 View Post
 

 

That's pretty interesting you felt that way about the tubes. Looking of the EF2a, it doesn't seem like it really has lots of juice on the bottom end. 

 

I'd bet the K612 would sound sweet with a vintage receiver. 


Yea, well the differences are easily audible, especially with the K712 and K612. The EF2A has a lot of gain and outputs a lot of voltage, every single AKG I hooked up to it sounds sweet, powerful, dynamic, physical, and musical with the amp. It's not the most soundstage oriented amp, but it's not really lacking in soundstage either. It brings out the dynamics and physicality out of AKGs from the bass, mids, and treble. The slam, presence, and physicality of the bass is impressive. It's a fun amp that gives you quite a physical experience.

 

I haven't heard them on a vintage receiver. I loved both the K612 and K712 with various tube amps I heard though.

 

Well bravo for hifiman then. I think you'd been even more impressed with these headphones if you ever get the chance to hook them up to something that really puts out some power. They love it. 

post #1237 of 1499
Quote:
Originally Posted by elwappo99 View Post
 

 

Well bravo for hifiman then. I think you'd been even more impressed with these headphones if you ever get the chance to hook them up to something that really puts out some power. They love it. 


Yea, a good cheap tube amp option for AKGs. I do plan to upgrade probably later this year, just not sure to what yet. I wonder how the Lyr would do with them.


Edited by kman1211 - 5/3/14 at 6:45pm
post #1238 of 1499
Quote:
Originally Posted by kman1211 View Post
 


Yea, a good cheap tube amp option for AKGs. I do plan to upgrade probably later this year, just not sure to what yet. I wonder how the Lyr would do with them.

 

I'm all ears for a recommendation that's not too costly. I am constantly looking around for more home theatre type amplifiers, instead of 'headphone' amplifiers, in hopes I can find something with lots of power, at a Vintage cost (instead of a collector's cost).

post #1239 of 1499

FYI, I've replaced the LM4562 with the LME49710HA [props to chodi] in my Mstage and I am loving the K612 even more now! It has a similar effect like swapping the pads for the K701 pads but to a lesser degree [the K701 pads were too warm for me] it doesn't mask any details either [a very nice op-amp I should say!]. The treble is still not completely grain free and a bit peaky sometimes but it's no longer harsh and in balance with mids and lows :] I am seeing [or rather hearing] the limitations of the K612 more now though cause I can focus on the music more easily, like a lack of top refinement. But they are now amazingly musical and PRaT is top notch as well :gs1000smile: 


Edited by conquerator2 - 5/12/14 at 1:13pm
post #1240 of 1499
Quote:
Originally Posted by conquerator2 View Post
 

FYI, I've replaced the LM4562 with the LME49710HA [props to chodi] in my Mstage and I am loving the K612 even more now! It has a similar effect like swapping the pads for the K701 pads but to a lesser degree [the K701 pads were too warm for me] it doesn't mask any details either [a very nice op-amp I should say!]. The treble is still not completely grain free and a bit peaky sometimes but it's no longer harsh and in balance with mids and lows :] I am seeing [or rather hearing] the limitations of the K612 more now though cause I can focus on the music more easily, like a lack of top refinement. But they are now amazingly musical and PRaT is top notch as well :gs1000smile: 


The treble does have some grain up top that cant really be eliminated but with the right synergy it's never harsh and well-balanced. That's one aspect where my K712 is better, the treble is more refined, while it can be harsh on some systems there is less grain and more refinement up top as it becomes smoother and more defined on a system it does well with. On a higher end system I can see the K712 outpacing the K612 by a good amount. Can't wait until I get a better amp, but it will have to wait for a while.

 

The K612 is extremely musical with great PRAT on some systems, it's why I grew to love it's sound so much.


Edited by kman1211 - 5/12/14 at 2:21pm
post #1241 of 1499

I think LM4562/49710 sounds gross in whatever I put it into unless I add at least a 0.1uF C0G/NP0 ceramic cap across the power pins.  That awful plasticky sound and boosted upper treble.  With the cap for improved stability, it is linear and great.

post #1242 of 1499
Quote:
Originally Posted by Mad Max View Post

I think LM4562/49710 sounds gross in whatever I put it into unless I add at least a 0.1uF C0G/NP0 ceramic cap across the power pins.  That awful plasticky sound and boosted upper treble.  With the cap for improved stability, it is linear and great.

Well absolutely - http://m.ebay.com/itm/180872434827?nav=SEARCH

I have the LM4562 without the caps and it sounds inferior IMO...
post #1243 of 1499

Any quick tips on cleaning the pads?

post #1244 of 1499
Need some advice on the K612Pro. I really like the AKG sound (Not a Senn fan, BTW). I have the K550s and the K518 LE.

In AKG open headphones, I've only tried the Q701s. Overall, I really liked them. I did feel like the bass was not quite as well extended as I would like, but that's not a deal breaker. And the slightly smaller soundstage of the K612 is attractive to me. I did find the Q701 soundstage to be a little bigger than it needed to.

However, I have tinnitus, and the particular treble peak on the Q701s tended to irritate it. It seems like the K612 would be an improvement in that regard, more neutral in treble response compared to the overall frequency response?

Does that sound about right?
post #1245 of 1499
Quote:
Originally Posted by cel4145 View Post

Need some advice on the K612Pro. I really like the AKG sound (Not a Senn fan, BTW). I have the K550s and the K518 LE.

In AKG open headphones, I've only tried the Q701s. Overall, I really liked them. I did feel like the bass was not quite as well extended as I would like, but that's not a deal breaker. And the slightly smaller soundstage of the K612 is attractive to me. I did find the Q701 soundstage to be a little bigger than it needed to.

However, I have tinnitus, and the particular treble peak on the Q701s tended to irritate it. It seems like the K612 would be an improvement in that regard, more neutral in treble response compared to the overall frequency response?

Does that sound about right?

Yep, sounds about right.
Still, pairing the K612 with a warmer source or amp is recommended. The treble is still very focused/present. That's a trait all open AKGs share smily_headphones1.gif
Edited by conquerator2 - 5/18/14 at 10:44am
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