I'm getting a bug to buy these, tell me why not..

[Happy Camper]

aA,

The K70x need a good break in of several (3-4) hundred hours. Initial sessions will be light bodied presentation, some sibilance, no bass impact. They will do best with a hybrid or ss amp. They are very detailed with an artificial high and about the largest headstage out there. When broken in, the highs will smooth out and bass will gain accuracy and extend to about 30~. The headstage extends outside your skull. They do well with natural instruments and vocals. Not real engaging with high energy genre and bass heavy music.

I'd suggest a hybrid amp with a digital source and an ss amp with analog. A full tube amp would be expensive because of the power supply needed to run the well. I'd suggest an output of at least 500 mw. The K70x are 64ohm but not very sensitive. AKG says 200mw max power rating but experience is complex material needs more reserve current. The K70x will scale well with better front ends and are ruthless on poor recordings.

A couple of things to help the break in. Wash your pads a couple of times (notice the position of the donuts before removing them as the thicker part goes to the back). This will get the foam to conform to your skull quicker. This will help the bass. Positioning is important to get the best bass too. They respond well with pink noise at moderate volume.

And after doing all that, you may not like them. Re-sell on these are around $190. If you do like them, responses have been favorable on a re-cable. They get another level of clarity and speed. I don't think I'd re-cable unless perhaps a silver coated copper with an analog source.

Negatives include plastic sounding mid-highs that throws off the natural timbre and pitch of stringed instruments. They have no bass impact and present everything in an airy presentation. Little weight in the mid-lows down. Many people have problems with the headband bumps on their heads. A little leather conditioner and a hard fold at the crown of the headband will loosen them up quicker than just wearing them.

And the worst thing is you can never wear them in public. They look to some like toilet seats.

[atomicAdam]

aA,

The K70x need a good break in of several (3-4) hundred hours. Initial sessions will be light bodied presentation, some sibilance, no bass impact. They will do best with a hybrid or ss amp. They are very detailed with an artificial high and about the largest headstage out there. When broken in, the highs will smooth out and bass will gain accuracy and extend to about 30~. The headstage extends outside your skull. They do well with natural instruments and vocals. Not real engaging with high energy genre and bass heavy music.

I'd suggest a hybrid amp with a digital source and an ss amp with analog. A full tube amp would be expensive because of the power supply needed to run the well. I'd suggest an output of at least 500 mw. The K70x are 64ohm but not very sensitive. AKG says 200mw max power rating but experience is complex material needs more reserve current. The K70x will scale well with better front ends and are ruthless on poor recordings.

A couple of things to help the break in. Wash your pads a couple of times (notice the position of the donuts before removing them as the thicker part goes to the back). This will get the foam to conform to your skull quicker. This will help the bass. Positioning is important to get the best bass too. They respond well with pink noise at moderate volume.

And after doing all that, you may not like them. Re-sell on these are around $190. If you do like them, responses have been favorable on a re-cable. They get another level of clarity and speed. I don't think I'd re-cable unless perhaps a silver coated copper with an analog source.

Negatives include plastic sounding mid-highs that throws off the natural timbre and pitch of stringed instruments. They have no bass impact and present everything in an airy presentation. Little weight in the mid-lows down. Many people have problems with the headband bumps on their heads. A little leather conditioner and a hard fold at the crown of the headband will loosen them up quicker than just wearing them.

And the worst thing is you can never wear them in public. They look to some like toilet seats.

Well - you obviously have had a pair or know what the hell you are talking about.

Sound stage is small and dynamics are tight right now. Listening to simple vinyl recordings sounds good but Darkside of the Moon was horrible at parts.

Right now I've got the AVA Omega III pre-amp and the KingRex Tripath Headphone amp and have been switching between the two. The AVA puts out better bass, fuller body, no punch, but I've got to turn the volume almost all the way up. The KingRex sound ok in the mids highs to highs. Lacking lower mids and upper bass. Which is a critique i've read in a 6moon review of the Tripath T2020-20 chip. But who knows.

I'm supposed to have a Trends Audio T10 tube amp on the way, that might not cut it for these.

I'm going to run them on the pinknoise all day tomorrow - thanks puppachub - I saw that link before and d/l that app. But I can't find now.

The head strap doesn't bother me too much, but the ear muffs are a bit hard. Washing machine? Really? Would a hand wash be better?

So far I don't here the shhhhh sounds and they did really pretty well with NIN FDTS - though not awesome. Was going to try Massive Attack soon. But good to know the bass will get better. If it does it sounds like it will be perfect for me.

You have some recommended amps to pair with? Ajani suggested Musical Fidelity XCan V8 and Benchmark DAC1 (or maybe just the Benchmark H1).

Thanks -

-aA

[atomicAdam]

seems like the KingRex should be a good match in power - at 360mW at 60ohm.

the TrendsAudio is 3.0 Watts per channel on 33 Ohm Headphone

1mW = 1thousandth of a watt - so 3.0 Watts would be 3,000mW. Looking at the KingRex stats - it appears that as Ohms go up mW go down. Help me if my math is wrong, or logic - but if the K701 are 64Ohm than about double the 33 of the TA so about 1.5Watts per channel. Which would mean 1,500mW. Or do I have one extra zero? and it is 150mW. Which is a bit under what is recommended. So a good test would be to see if it has issues with large complex musical pieces.

[atomicAdam]

aA,

I'd suggest a hybrid amp with a digital source and an ss amp with analog. A full tube amp would be expensive because of the power supply needed to run the well. I'd suggest an output of at least 500 mw. The K70x are 64ohm but not very sensitive. AKG says 200mw max power rating but experience is complex material needs more reserve current. The K70x will scale well with better front ends and are ruthless on poor recordings.


.

Specs around the web for the K701 are

Frequency Response: 10Hz to 39.8k Hz

Efficiency: 105 dB SPL /V

Maximum input power: 200 mW

Impedance: 62 Ohms