I personally wouldn't wait past the 30 day period to be safe. I sent Ken a PM and he was very responsive but I bet he would prefer to communicate about this sort of stuff through email - ken@aloaudio.com. 
 
It sounds like you have the same issue as me. If you are ok with the noise floor/ hiss, and primarily looking to correct the channel imbalance with your IEMs, I would recommend you send your amp back to him. 

hop ham said:

A lot of talk about the noise floor. I got my amp back from Ken a few days ago after he lowered the gain on the low setting. Using my JH16s (balanced and not) and FitEar 334s, the noise floor/ hiss has remained the same but I can turn the volume knob further before reaching my normal IEM listening level, which solves the channel imbalance problem. I think I'm only one of two people in this thread so far that had a serious issue with the volume getting too loud before being able to really tell if the channels were balanced, using sensitive IEMs. No longer. I can live with the hiss. While I would expect a product like this to be quieter (my RSA portable amps all have a black background), the sound is so damn good that I am willing to live with it. 

I don't know if it's product variance/ defects with certain units but I'm willing to guess it can also have something to do with the differences in how sensitive our hearing is.

Ken - thanks for everything. I'm happy.

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Got mine this afternoon and IMO this is a killer amp for HE-6
Even at low gain I could not go beyond 3 o clock!!

With my K3000 IEMs there is the aforementioned hiss and am unable to get the volume over 8.
the sound is excellent thought. Very clean, with exceptional micro detail retrieval and, for once, the BASS is to die for
More later...

Could I ask if the reduction in gain for the low setting affects anything else? Like, does it also affect the mid and high level gain levels or the sound signature of the low gain setting ( ie the amount of bass quantity and impact etc)? Cheers

Quote:

kremer930 said:

Could I ask if the reduction in gain for the low setting affects anything else? Like, does it also affect the mid and high level gain levels or the sound signature of the low gain setting ( ie the amount of bass quantity and impact etc)? Cheers

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I'm also wondering if the reduction in the low settings for IEMs also affects the higher gain settings when using full sized cans?

From the moments I spent with it at the Tokyo Headphone show, I concur, bass is phenomenal. I was just using HD800 though and it was loud, so my experience wasn't as glorious as it could have been.
Quote:

shahzada123 said:

Got mine this afternoon and IMO this is a killer amp for HE-6
Even at low gain I could not go beyond 3 o clock!!
With my K3000 IEMs there is the aforementioned hiss and am unable to get the volume over 8.
the sound is excellent thought. Very clean, with exceptional micro detail retrieval and, for once, the BASS is to die for
More later...

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Hi Shahzada.  I am interested in your views of the RX3 with the HE6.  Do you find that the bass slams as hard or reaches as deep compared to when you run the HE6 from the Lyr?  And if so, what tubes are you running in the Lyr?  Cheers

Quote:

kremer930 said:

Could I ask if the reduction in gain for the low setting affects anything else? Like, does it also affect the mid and high level gain levels or the sound signature of the low gain setting ( ie the amount of bass quantity and impact etc)? Cheers

Click to expand...

 
I asked these same questions to Ken while he was working on my amp. His response "No there will be zero change in the sonics of the amp. Only the low gain is changed not the Med or High."
 
I also tested this myself and find no difference in sound character in low gain setting. But I should mention I only had my amp for about a week before sending to Ken to reduce the gain, and I only got my amp back 4 days ago. 
 

shahzada123 said:

Got mine this afternoon and IMO this is a killer amp for HE-6
Even at low gain I could not go beyond 3 o clock!!
With my K3000 IEMs there is the aforementioned hiss and am unable to get the volume over 8.
the sound is excellent thought. Very clean, with exceptional micro detail retrieval and, for once, the BASS is to die for
More later...

Click to expand...

 
I'd kill for some more impressions of the HE-6 with the Rx Mk3! Especially in the bass region

It's still early days but a few quick thoughts.. 
 
Not only does it drive the HE-6, it ROCKS! This thing has both power and finesse. 
With bass set at the halfway mark, the sound has a somewhat less edgy texture to it, if you know what I mean.
By that I don't mean to say that there's any harshness otherwise. Just a specific effect it has on the overall sound signature.
Female vocals have a slight sibilance but this may be due to the source (CLAS).
I'll change the source tonight and see how it goes.
The mids are very neutral and absolutely grain free.
 
With quite a few amps, the treble on the HE-6 can sometimes get a little fatiguing. This is where the MKIII really excels.
The treble sounds less energetic and is big a welcome to these ears.
 
BTW this amp has a very high gain setting. All my listening with the HE-6 is on the medium gain setting and at the most at 11-12 o'clock 
More later..

shahzada123 said:

It's still early days but a few quick thoughts.. 
 
Not only does it drive the HE-6, it ROCKS! This thing has both power and finesse. 
With bass set at the halfway mark, the sound has a somewhat less edgy texture to it, if you know what I mean.
By that I don't mean to say that there's any harshness otherwise. Just a specific effect it has on the overall sound signature.
Female vocals have a slight sibilance but this may be due to the source (CLAS).
I'll change the source tonight and see how it goes.
The mids are very neutral and absolutely grain free.
 
With quite a few amps, the treble on the HE-6 can sometimes get a little fatiguing. This is where the MKIII really excels.
The treble sounds less energetic and is big a welcome to these ears.
 
BTW this amp has a very high gain setting. All my listening with the HE-6 is on the medium gain setting and at the most at 11-12 o'clock 
More later..

Click to expand...

 
Great! Now i just somehow need to compare it to the sennheiser HD800... xD

shahzada123 said:

It's still early days but a few quick thoughts.. 

Not only does it drive the HE-6, it ROCKS! This thing has both power and finesse. 
With bass set at the halfway mark, the sound has a somewhat less edgy texture to it, if you know what I mean.
By that I don't mean to say that there's any harshness otherwise. Just a specific effect it has on the overall sound signature.
Female vocals have a slight sibilance but this may be due to the source (CLAS).
I'll change the source tonight and see how it goes.
The mids are very neutral and absolutely grain free.

With quite a few amps, the treble on the HE-6 can sometimes get a little fatiguing. This is where the MKIII really excels.
The treble sounds less energetic and is big a welcome to these ears.

BTW this amp has a very high gain setting. All my listening with the HE-6 is on the medium gain setting and at the most at 11-12 o'clock 
More later..

Click to expand...

Listening to this combination again, I am surprised at the level of detail which comes from this rig. But, even trying medium gain as well as my expected high gain level, I don't find that the bass is full or extended. When I try to increase the volume to try and add some impact I find that I can hear the amp running out of power. Turning the volume down lower and attempting to compensate by using the bass boost also delivers the same result.

I must admit that if you had not heard the HE6 near their best before that you may very well be satisfied with their performance from the RX3. I have certainly heard many other rigs which don't sound anywhere near as good.

I am listening to this balanced out to the cans from the CLAS rig.

So I just learned from Ken that when they received my amp back, 2 of his guys checked it out and found nothing wrong! They used a balanced signal and a pair of balanced IEMs and observed no abnormalities where I had heard the serious distortions and noise. (The noise was so pronounced for me that it was even audible with the HD 25-1 II.)

I know some of you have heard the noise from your amps while others say it is "silent" ... This is really very interesting to me -- especially as the sound I heard with IEMs simply could not be characterized as "silent".

To those of you who heard the noise floor, have you tried the balanced input?

Quote:

thread said:

So I just learned from Ken that when they received my amp back, 2 of his guys checked it out and found nothing wrong! They used a balanced signal and a pair of balanced IEMs and observed no abnormalities where I had heard the serious distortions and noise. (The noise was so pronounced for me that it was even audible with the HD 25-1 II.)
I know some of you have heard the noise from your amps while others say it is "silent" ... This is really very interesting to me -- especially as the sound I heard with IEMs simply could not be characterized as "silent".
To those of you who heard the noise floor, have you tried the balanced input?

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I can set mine up for balanced input but usually do not do it since the DX100 single ended to me is better but I will see what I can hear.  I hear a noise floor in mine but no distortion or channel imbalance.  I do not think the noise floor is going to change by having a balanced input but I will check.  The noise floor balanced out is slightly lower than single ended to me.
 
Response:
 
Took me a while to find the right cable for the balanced input since I had not used it for a month or so but I found it.  Set up the iBasso supplied coax out of the iBasso DX100 into the iBasso DB2 into the ALO Rx Mk3-b using a Moon Audio IEM Silver Dragon wired connector.  I have to say I was surprised by how loud the DB2 was compared with how I usually have the DX100 setup.  With the DX100 into the Mk3, I listen to the Mk3 on gain setting of 2 with the DX100 volume setting at 200 (low gain) on the line out of my DX100.  This is very listenable for me compared with the output of the DB2.  With the DB2 I could hear music with the volume setting all the way down. I had to take the Mk3 down to gain setting of 1 and turn the volume knob down almost all the way down (9-11 o'clock) just to not have it to loud for me.  I was also hearing music at zero setting on the Mk3 knob which could be taken as an imbalanced I guess.  However, depending on the track I could hear things on either side.  I did not hear any distortions that I could make out and I still heard a noise floor; albeit,  it seems a little less than my normal single ended input while listening balanced out.  The dishwasher is on behind me now so my background is noisy; so take what I said about noise being lower with several grains of salt.  Balanced all the way may make the noise floor lower but it does not make it black.  If loudness was the measurement for sound the DB2 wins but the delicacy of sound from the DX100 wins in my book.  My sensitive IEM is the Westone ES5 balanced cabled.
 
I think their is a sensitivity level on the Mk3 for voltage input that needs to be cared for best control of the music when using the Mk3.

I don't yet have anything to feed in a balanced input signal. Will have to wait til the end of the year for the Shiit statement rig for that choice.

What source are you using?

I agree that the noise floor can be a little Higher than some but with my JH16 it is never an issue. Even when listening at a reasonably low volume. With no source playing I can crank the volume to max and hear nothing.

The only issue that i have is the channel imbalance at super low volumes. This is more than I have heard with most amps but it is also a non issue as it is way below my usual listening volume and also below my quiet times listening volume.

I was at home studying yesterday so let my Lyr/Bifrost rig warm up for over 30 mins and then had a listen to the same song from my CLAS/RX3 rig versus the Lyr rig using my HE6. The Lyr sounded anaemic compared to the bass textures of the Rx3 and Jh16. I was amazed that the difference was so great. My portable rig was always just meant to be something to use when I was not at home. Now it is my go to rig of choice.

Looks like another excuse to get some Schiit statement gear....

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stephenm said:

[size=10pt]When I plug in and unplug the headphone connector from my RXIII, I can feel the circuit board is not firmly fastened to the enclosure compartment.  The movement is not of a big magnitude, but is very obvious that I can feel it.  Anyone has similar situation?[/size]

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The circuit board isn't attached to the enclosure. It slides into slots which are part of the extruded case and is held in place by the front and rear panels. There's bound to be some tolerance differences in the length of the extrusion and the lengths of the circuit boards so some units may have a bit of "play" in them. But it's not any sort of problem or anything to worry about.
 
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