[bflat]

Mk3 "hiss" with IEMs, one of the reasons why we made the all new Rx IEM amp we just released was to work in a more targeted product for earphones. The Mk3 was intended for larger headphones and many people were put off with the higher noise floor of the Mk3.

Glad you are liking the amp!

Thank you

Ken

Ken - here's a funny but maybe serious idea.
 
How about a version of the new Rx than can be internally bridged to mono. Then people could buy 2x of those to run BO lol. Not sure how volume control would work, but the setup would look pretty darn cool especially if you offered up a red or black aluminum enclosure.
 
I have to admit, I love seeing these little mini stacks and being reminded of how big desktop components are.
 
Actually if you used an Arduino micro controller for volume you could easily link two and have them communicate bidirectionally to have either dial control volume for both

 

[Law87]

  Just got my RX MK3B+ today from the warehouse sale and it looks 100% new. Very nice box and I was really surprised by how heavy the amp is, but in a good way. Pretty pleased with the sound so far and the bass control is really making this work for me. In case folks are wondering, this does not do well with Shure SE846. Soundwise, it's great, but there is a decent level of hiss that you can hear on low volume passages in music. On a plane, you probably won't notice. I expected this at purchase and never planned to pair the two but did it just to see. I tried a 22 Ohm impedance adapter and that got rid of 100% of the hiss so I think you want 16 ohm or higher IEMs for this amp. Just a great deal on a TOTL portable amp!

 
mine came today too but I was at work damn you work!

I got a 100ohms adapter, I hope it doesnt change the sound too much.

 

[bflat]

   
mine came today too but I was at work damn you work!

I got a 100ohms adapter, I hope it doesnt change the sound too much.

One word of caution - this thing packs some serious power. You probably will need to go to mid gain with the 100 ohm adapter but turn the volume down low before you do.

 

[Law87]

does anyone find the amp get warm when charging and using it  at the same time?

 

[bflat]

Yep, same as my AK240. I'm sure it's normal.

 

[ButtUglyJeff]

But no excessive heat, even when stacked with my CLAS db....

 

[Law87]

thanks guys.

 

[Law87]

another questions, How do you guys mitigate EMI from your cellphone?

p.s I cant believe this is still a problem for Alo amp, I had these in RX mk2 but I wouldnt expect it out of this amp.

 

[bflat]

Other than getting a very good quality and shielded mini stereo cable, it's up to your cellphone's noise performance. I pretty much gave up on smartphone as a DAP.

 

[Law87]

  Other than getting a very good quality and shielded mini stereo cable, it's up to your cellphone's noise performance. I pretty much gave up on smartphone as a DAP.

my JDS C5D have no EMI issue at all, I say this is pretty poor quality for a 650 amp.

 

[bflat]

 
my JDS C5D have no EMI issue at all, I say this is pretty poor quality for a 650 amp.

I would talk to someone at ALO. Since C5D charges from USB and ALO charges from a wall plug, you may be dealing with a ground loop issue instead of EMI.

 

[Law87]

 
I would talk to someone at ALO. Since C5D charges from USB and ALO charges from a wall plug, you may be dealing with a ground loop issue instead of EMI.

 
I'm 100% sure its EMI because it only happen if I am on data on my phone and my phone near the unit otherwise it is fine.

 

[bflat]

You are right. Tried the ALO on my iPhone and I can hear some clicking when data is turned on. If I don't place the phone right on the amp, then EMI goes away. I experienced this to a lesser extent with a JDS C5 and had to place it upside down on the back of my phone.
 
Update - Just tried the same on the ALO and if I place the back of the phone squarely on the underside (non logo) of the amp and slight towards the back of the amp, then EMI goes away. See if that helps. I've struggled with various EMI issues with my phone so I just went DAP.

 

[Law87]

   
Update - Just tried the same on the ALO and if I place the back of the phone squarely on the underside (non logo) of the amp and slight towards the back of the amp, then EMI goes away. See if that helps. I've struggled with various EMI issues with my phone so I just went DAP.

 
 
thanks I'll try it. Its a shame, the amp sound really good.

 

[seeteeyou]

 
http://www.molex.com/molex/products/family?channel=products&chanName=family&key=hozex
http://www.mouser.com/search/refine.aspx?Ntk=P_MarCom&Ntt=112337168
http://www.mouser.com/new/molex/molex-hozox-emi/
 
Maybe HOZOX could work? No reviews were posted for absorbing EMI yet but that could be worth a try.
 

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